KNT-01-BD-E-0001_ELECTRICAL PRE-FEED BOD FOR KNT_B1_150413.pdf

PROVISION OF CONCEPTUAL STUDY KINH NGU TRANG FIELD, AND OTHER POTENTIAL PROSPECTS, BLOCK 092/09, OFFSHORE VIETNAM ELECTRICAL PRE-FEED BOD FOR KNT

Document No.: KNT-01-BD-E-0001

Page 2 of 53

Revision No. Section

B1 5.4

B1 9.3

B1 9.6

PROVISION OF CONCEPTUAL STUDY KINH NGU TRANG POTENTIAL PROSPECTS, BLOCK 09-

FEED BOD FOR KNT

REVISION LOG

Revision Description

Ingress protection of Transformers: replace IP44 with

Ingress protection of LV Bus duct: replace IP68 with

Ingress protection of Transformers:replace IP44 with

Replace “The 400V LV Switchgear/MCC shall be designed

and constructed in accordance with the

Switchgear/MCC and Datasheet for LV Switchgear/MCC

which will be prepared during FEED.” w

shall be design and constructed in accordance with the

requirements of the latest edition of IEC 60439, IEC 61439

and IEC 60529, the Specification for LV Switchgear/MCC and

Datasheet for LV Switchgear/MCC which will be prepa

during FEED.”

: replace IP44 with IP23

: replace IP68 with IP55

:replace IP44 with IP23

The 400V LV Switchgear/MCC shall be designed

Specification for LV

Switchgear/MCC and Datasheet for LV Switchgear/MCC

with “LV switchgear

shall be design and constructed in accordance with the

requirements of the latest edition of IEC 60439, IEC 61439

the Specification for LV Switchgear/MCC and

Datasheet for LV Switchgear/MCC which will be prepared



Page 3 of 53

1. INTRODUCTION ................................

2. PROJECT DEFINITION

2.1 Abbreviations

2.2 Purpose of document

2.3 Reference Documents

2.4 Units of measurements

2.5 Language ................................

3. CODES, STANDARDS AND

3.1 Applicable IEC standards

3.2 Other standards

4. ENVIRONMENT CONDITIO

5. ELECTRICAL EQUIPMENT

5.1 Operational safety and reliability

5.2 Standardization of Equipment and Materials

5.3 Maintainability and Accessibility

5.4 Protection against Explosion and Fire Hazard

6. ELECTRICAL SYSTEM DE

6.1 General ................................

6.2 System Voltage

6.3 Equipment Operating Voltages

6.4 Voltage and Frequency Variation

6.5 Spare and contingency

7. LOAD ASSESSMENT AND ELE

7.1 Main Power Generators


FEED BOD FOR KNT

TABLE OF CONTENT

................................................................................................

PROJECT DEFINITION ................................................................

Abbreviations ........................................................................................

Purpose of document ................................................................

Reference Documents ................................................................

Units of measurements ................................................................

............................................................................................

CODES, STANDARDS AND APPILCABLE DOCUMENTS ..............................

Applicable IEC standards ................................................................

Other standards ................................................................

ENVIRONMENT CONDITIONS ................................................................

ELECTRICAL EQUIPMENT AND HAZARDOUS AREA CLASSIFICATION

Operational safety and reliability .........................................................

Standardization of Equipment and Materials ................................

Maintainability and Accessibility ..........................................................

Protection against Explosion and Fire Hazard ................................

ELECTRICAL SYSTEM DESIGN ................................................................

...............................................................................................

System Voltage ................................................................

Equipment Operating Voltages ...........................................................

Voltage and Frequency Variation ........................................................

Spare and contingency ................................................................

D ASSESSMENT AND ELECTRICITY CONSUMPTION ...........................

Main Power Generators ................................................................

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7.1.1 Option 1: Gas Turbine Generators

7.1.2 Option 2: Gas Engine Generator

7.2 Distribution Transformers

7.3 Emergency Power Generator

7.4 Other Electrical Equipment

7.5 Short Circuit Ratings

8. ELECTRICAL POWER GEN

8.1 Power Generation System Operation

8.2 Power Distribution

9. DESIGN AND SELECTION




9.2 MV Switchgear

9.3 Distribution Transformer

9.4 Neutral Grounding Resistor (NGR)

9.5 Emergency Diesel Generator

9.6 400V LV Switchgear/MCC

9.7 Low Voltage Distribution Boards

9.8 Variable Frequency Drive (VFD)

9.9 Uninterruptible Power Supply (UPS)

9.9.1 AC UPS

9.9.2 Batteries

9.10 Electric Motors

9.11 Electrical Heater

9.11.1 Crude oil heater


FEED BOD FOR KNT

Option 1: Gas Turbine Generators ................................

Option 2: Gas Engine Generator ................................

Distribution Transformers ................................................................

Emergency Power Generator ..............................................................

Other Electrical Equipment ................................................................

Short Circuit Ratings ................................................................

ELECTRICAL POWER GENERATION AND DISTRIBUTION SYSTEM

Power Generation System Operation ................................

Power Distribution ................................................................

DESIGN AND SELECTION OF ELECTRICAL EQUIPMENT ............................

Main Power Generators ................................................................

Option 1: Gas Turbine Generators ................................

Option 2: Gas Engine Generator ................................

MV Switchgear ................................................................

on Transformer ................................................................

Neutral Grounding Resistor (NGR) ......................................................

Emergency Diesel Generator ..............................................................

400V LV Switchgear/MCC ................................................................

Low Voltage Distribution Boards .........................................................

Variable Frequency Drive (VFD) .........................................................

Uninterruptible Power Supply (UPS) ................................

AC UPS ................................................................

Batteries ................................................................

Electric Motors ................................................................

cal Heater ................................................................

Crude oil heater ................................................................

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TION SYSTEM ........... 25

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9.11.2 Heat Tracing

9.12 Integrated Motor Control Centre (IMCS)

9.13 Bus duct ................................

9.14 Electric Power and Control Cables

9.15 Lighting System

9.16 Navigational Aids

9.16.1 Marine Navigational Lights

9.16.2 Foghorns

9.16.3 Aviation

9.16.4 Helideck Lightings

9.17 Welding Socket Outlets and convenience socket outlets

9.18 Junction Boxes

9.19 Cable Ladder/ Tray

10. PROTECTION, METERING

10.1 Generator Feeders

10.2 Switchgear/ MCC Incomer Feeders

10.3 Motor................................

10.4 Transformer Feeder

10.5 Feeders ................................

10.6 Lighting and

11. EARTHING ................................

11.1 System Earthing

11.2 Equipment Earthing

11.3 Lightning Protection


FEED BOD FOR KNT

Heat Tracing ................................................................

ted Motor Control Centre (IMCS) ................................

..............................................................................................

Electric Power and Control Cables ......................................................

Lighting System ................................................................

Navigational Aids ................................................................

Marine Navigational Lights ................................

Foghorns ................................................................

Aviation Obstruction lights ................................

Helideck Lightings .............................................................

Welding Socket Outlets and convenience socket outlets .....................

Junction Boxes ................................................................

adder/ Tray ................................................................

PROTECTION, METERING, CONTROL AND SUPPERVISION ......................

Generator Feeders ................................................................

hgear/ MCC Incomer Feeders ................................

................................................................................................

Transformer Feeder ................................................................

...............................................................................................

Lighting and Small Power................................................................

................................................................................................

System Earthing ................................................................

nt Earthing ................................................................

Lightning Protection ................................................................

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Page 6 of 53

1. INTRODUCTION

The Petroleum Sharing Contract of Block 09

Gas Group (PVN) and Petrovietnam

August 2009 and effective from 21st August 2009 (Effective Date) providing for PVEP to

conduct petroleum exploration within block 09

The block 09-2/09 includes the following: KinhNguTrang (KNT) a

discoveries, Song Ngu (SN) and Lead A prospects.

The KinhNguTrang (KNT) was discovered following the drilling of KNT

wells in 2010, 2011 and 2012 relatively and tested at commercial oil rates. The KinhNguTr

South (KTN) was then also discovered by drilling of KTN

2014 with a good well testing result.

Other exploration wells will also be drilled during 2014

gas potential on the KTN discovery, SN and Lead A prospects.

KNT structures located approximately 16km from CLPP and 14km from E1 Platform of Rang

Dong Field of Block 15-2 (JVPC) or 50km east of Bach Ho (Block 09.1) while KTN structure is

located 5km from KNT structure.

With the oil discovery in the KinhNguTrang field, the tentative first oil target of the early

development plan is 4th Quarter, 2016 from KinhNguTrang discovery. The KinhNguTrang South

will then be put into production in 3th Quarter, 2018.

Depending on the results of t

such as Song Ngu and Lead A, these prospects will be considered to put into development

together with KinhNguTrang field.

In general, the offshore facilities concept is determined based on t

flexibility to cater to the future, and to maximize the return on investment by considering using

the existing facilities in the nearby fields. The following concepts have been considered during

the screening selection study do

study as a minimum:

Tie-in development concept

Stand-alone development concept


FEED BOD FOR KNT

The Petroleum Sharing Contract of Block 09-2/09 was signed between Vietnam National Oil &

Gas Group (PVN) and Petrovietnam Exploration Production Corporation (PVEP) on the 6th


conduct petroleum exploration within block 09-2/09.

2/09 includes the following: KinhNguTrang (KNT) and KinhNguTrang South (KTN)

discoveries, Song Ngu (SN) and Lead A prospects.

The KinhNguTrang (KNT) was discovered following the drilling of KNT-1X, KNT

wells in 2010, 2011 and 2012 relatively and tested at commercial oil rates. The KinhNguTr

South (KTN) was then also discovered by drilling of KTN-1X and KTN-

2014 with a good well testing result.

Other exploration wells will also be drilled during 2014 - 2015 to explore and confirm the oil and

scovery, SN and Lead A prospects.


2 (JVPC) or 50km east of Bach Ho (Block 09.1) while KTN structure is

located 5km from KNT structure.

discovery in the KinhNguTrang field, the tentative first oil target of the early


will then be put into production in 3th Quarter, 2018.

Depending on the results of the exploration of other potential prospects in the block 09


together with KinhNguTrang field.

In general, the offshore facilities concept is determined based on the criterion of the need for



the screening selection study done by CLIENT, which will be used as a basis for this conceptual

in development concept

alone development concept

2/09 was signed between Vietnam National Oil &

Exploration Production Corporation (PVEP) on the 6th


nd KinhNguTrang South (KTN)

1X, KNT-2X and KNT-3X

wells in 2010, 2011 and 2012 relatively and tested at commercial oil rates. The KinhNguTrang

-2X in 2013 and early

2015 to explore and confirm the oil and


2 (JVPC) or 50km east of Bach Ho (Block 09.1) while KTN structure is

discovery in the KinhNguTrang field, the tentative first oil target of the early


he exploration of other potential prospects in the block 09-2/09


he criterion of the need for



ne by CLIENT, which will be used as a basis for this conceptual



Page 7 of 53

An overview Location of Block 09


FEED BOD FOR KNT

Location of Block 09-2/09is shown in the Figure 1.0 below:

Figure 1: Location of Block 09-2/09

Block 09.2 OpenLô 09-2/09



Page 8 of 53

2. PROJECT DEFINITION

Terms

PVEP POC / Company

EC

VENDORS/SUB-

CONTRACTORS/SUPPLIE

2.1 Abbreviat ions

ACB Air Circuit Breaker

CCU Central Control Unit

TCWB Tinned Copper Wire Braided

DCS Distributed Control System

ELCB Earth Leakage Circuit Breaker

ESD Emergency shutdown (system)

FGS Fire and Gas System

FCU Feeder Control Unit

FPR Feeder Protection Relay

GCP Generator Control Panel

ICSS Integrated control safety system

IMCS Integrated Motor Control System

HPS High Pressure Sodium

LSZH

MV

Low smoke zero halogen

Medium

LV Low Voltage

LCS Local Control Station or Remote Control Unit (RCU)

MBI Metal Halide


FEED BOD FOR KNT

PROJECT DEFINITION

Definitions

Petrovietnam Domestic Exploration Production

Operating Company Limited

Engineering Consortium (PVE/ATPCE SDN BHD)

CONTRACTORS/SUPPLIERS

Means any and all VENDORS, SUB

CONTRACTORS, and SUPPLIERS to the

CONTRACTOR at any tier and any lower tiers of

sub-contractors, suppliers and vendors.

Air Circuit Breaker

Central Control Unit

Tinned Copper Wire Braided

Distributed Control System

Earth Leakage Circuit Breaker

Emergency shutdown (system)

Fire and Gas System

Feeder Control Unit

Feeder Protection Relay

Generator Control Panel

Integrated control safety system

Integrated Motor Control System

High Pressure Sodium

Low smoke zero halogen

Medium Voltage

Low Voltage

Local Control Station or Remote Control Unit (RCU)

Metal Halide

Petrovietnam Domestic Exploration Production

Engineering Consortium (PVE/ATPCE SDN BHD)

Means any and all VENDORS, SUB-

CONTRACTORS, and SUPPLIERS to the

CONTRACTOR at any tier and any lower tiers of

contractors, suppliers and vendors.

Local Control Station or Remote Control Unit (RCU)



Page 9 of 53

MCB Miniature Circuit Breaker

MCCB Moulded Case Circuit

MCC Motor control centre

MCT Multi Cable Transit

MCU Motor Control Unit

NGR Neutral Grounding Resistor or Neutral Earthing Resistor (NER)

PAGA Public Address and General Alarm

PSMCS Power Supply Monitoring and Control System

PCS Process

RCCB Residual Current Circuit Breaker

UPS Uninterruptible Power Supply

UCP Unit Control Panel

VCB Vacuum Circuit Breaker

VCU Vacuum Contactor Unit

VFD Variable Frequency Drive

2.2 Purpose of document

The intent of this document is to provide an overview and guidelines for electrical power

generation, distribution, and Pre

KinhNguTrang Wellhead platform (

This BoD will be developed in con

- Option 1: main generators are 2x100% gas turbine generators with gas booster

compressor and crude oil heater to be electric type.

In this option, the KNT WHP shall generate its own three phase

6.6kV by dual fuel Gas Turbine Generators (GTG), each one has capability of supplying

100% load (2x100% arrangement) to the MV Switchgear. The MV Switchgear distributes

power to the WHP major loads

Switchgear/MCC via two (2) 6.6kV/400V step

transformer is capable to supply 100% of load. The 400V

as the main distribution board for

- Option 2: main gene

booster compressor and glycol direct gas burner heater type.


FEED BOD FOR KNT

Miniature Circuit Breaker

Moulded Case Circuit Breaker

Motor control centre

Multi Cable Transit

Motor Control Unit

Neutral Grounding Resistor or Neutral Earthing Resistor (NER)

Public Address and General Alarm

Power Supply Monitoring and Control System

Process Control System

Residual Current Circuit Breaker

Uninterruptible Power Supply

Unit Control Panel

Vacuum Circuit Breaker

Vacuum Contactor Unit

Variable Frequency Drive

Purpose of document


Pre-FEED Basis design of the electrical systems and services in

Wellhead platform (KNT).

developed in consideration of 2 (two) options as below:

Option 1: main generators are 2x100% gas turbine generators with gas booster

compressor and crude oil heater to be electric type.

In this option, the KNT WHP shall generate its own three phase

Gas Turbine Generators (GTG), each one has capability of supplying


power to the WHP major loads such as motor driver compressorand 400V

via two (2) 6.6kV/400V step-down Power Transformers. Each

transformer is capable to supply 100% of load. The 400V LVSwitchgear

as the main distribution board for all other electrical equipment installed on the platform

main generator is 1x100% gas engine generator with gas engine driven

booster compressor and glycol direct gas burner heater type.

Neutral Grounding Resistor or Neutral Earthing Resistor (NER)


design of the electrical systems and services in

Option 1: main generators are 2x100% gas turbine generators with gas booster

In this option, the KNT WHP shall generate its own three phase electrical supply at

Gas Turbine Generators (GTG), each one has capability of supplying


motor driver compressorand 400V LV

down Power Transformers. Each

Switchgear/MCC shall serve

installed on the platform.

rator is 1x100% gas engine generator with gas engine driven



Page 10 of 53

In this case, the KNT WHP shall generate its own three phase electrical

by 1x100% Gas Engine Generator (GEG)

engine driver and Glycol direct gas burner heater will be used. The LV

serve as the main distribution board for

option, Emergency Diesel Generator shall be rated

Finalized selection for electrical configuration will be subjected to the result of KNT WHP

Primary Equipment Design.

In any cases, theelectrical system

requirements:

Safe operation and maintenance for personnel as well as equipment

Reliable electrical power generation and distribution systems under all working condition

at site

Selection of electrical equipment and accessories appropriate for the environmental

condition at site.

Efficient power distribution and utilisation

Commonality & interchange ability of equipment

Spare capacity for future load

Ease of operation, and minimum maintenance of equipment

Constructability and operability of installation and equip

Withstand the technical scrutiny of the third party independent verification body

(appointed by Company

The purposes of this document is to summarise the Basis of Design in preparation for

FEED.

It is noted that the design basis and philosophies that were selected in this document is not the

only design that could be developed nor itis the necessary optimum design. FEED contractor

shall review, verify and validate (excluding the key data) and as a

design may be improved during the FEED execution

2.3 Reference Documents

KNT-01-BD-E-0001

KNT-01-DW-E-0001


FEED BOD FOR KNT

In this case, the KNT WHP shall generate its own three phase electrical

Engine Generator (GEG). Booster compressor was driven by gas

and Glycol direct gas burner heater will be used. The LV

serve as the main distribution board for utility systems installed on the platform

option, Emergency Diesel Generator shall be rated similar to Gas Engine Generator.


electrical system design shall fulfill the following engineering/design




Efficient power distribution and utilisation

Commonality & interchange ability of equipment

Spare capacity for future load

Ease of operation, and minimum maintenance of equipment

Constructability and operability of installation and equipment


(appointed by Company)

The purposes of this document is to summarise the Basis of Design in preparation for



shall review, verify and validate (excluding the key data) and as a result to determine that the

design may be improved during the FEED execution.

Reference Documents

Electrical Load List Analysis Report

Key Single Line Diagram

In this case, the KNT WHP shall generate its own three phase electrical supply at 400V

mpressor was driven by gas

and Glycol direct gas burner heater will be used. The LV Switchgear shall

installed on the platform. In this

similar to Gas Engine Generator.


design shall fulfill the following engineering/design





The purposes of this document is to summarise the Basis of Design in preparation for Pre-



result to determine that the

Analysis Report



Page 11 of 53

2.4 Units of measurements

The International System of units (S.I.) shall be used in all drawings and documentation unless

otherwise stated.

2.5 Language

All drawings, documentation and correspondence shall be in the English Language.

3. CODES, STANDARDS AND

The electrical system design shall generally comply with the latest revision and relevant

sections of the following regulations, standards and codes of practices.

The applicable laws, international codes and standards are as follows:

Relevant Laws of Soci

International Electrotechnical Commission (IEC), and other standards listed in

3.1 and 3.2 of this document.

Note: Unless specifically designated by date, the latest edition of each publication shall be used,

together with amendments, supplements or revision thereto.

3.1 Appl icable IEC standards

IEC 60034 Series Rotating Electrical Machines

IEC 60038 IEC Standard Voltage

IEC 60044-1 Instru

IEC 60044-2 Instruments Transformers

IEC 60050 International Electro technical Vocabulary

IEC 60071 Insulation Co

IEC 60072 Series Dimensions and output series for rotating electrical machines

IEC 60073 Basic and Safety Principles for

and Identification

IEC 60076 Power transformers (all parts applicable to dry type power

transformers)


FEED BOD FOR KNT

Units of measurements

System of units (S.I.) shall be used in all drawings and documentation unless


CODES, STANDARDS AND APPILCABLE DOCUMENTS


sections of the following regulations, standards and codes of practices.

The applicable laws, international codes and standards are as follows:

Relevant Laws of Socialist Republic of Vietnam

International Electrotechnical Commission (IEC), and other standards listed in

of this document.


amendments, supplements or revision thereto.

Appl icable IEC standards

Rotating Electrical Machines

IEC Standard Voltage

Instruments Transformers – Part 1: Curent Transformer

Instruments Transformers – Part 2: Inductive Voltage Transformer

International Electro technical Vocabulary

Insulation Co-ordination

Dimensions and output series for rotating electrical machines

Basic and Safety Principles for Man-machine Interface, Marking

and Identification - Coding Principles for Indicators and Actuators

Power transformers (all parts applicable to dry type power

transformers)

System of units (S.I.) shall be used in all drawings and documentation unless


APPILCABLE DOCUMENTS


International Electrotechnical Commission (IEC), and other standards listed in section


rent Transformer

Part 2: Inductive Voltage Transformer

Dimensions and output series for rotating electrical machines

machine Interface, Marking

Coding Principles for Indicators and Actuators

Power transformers (all parts applicable to dry type power



Page 12 of 53

IEC 60079 Electrical Apparatus for Explosive Gas Atmospheres.

IEC 60079-30 Electrical Apparatus for Explosive Gas Atmospheres

resistance heat tracing.

IEC 60085 Thermal evaluation and classification of electrical insulation

IEC 60092-350 Electrical Installations in Ships

cables

IEC 60092-351

Electrical Installations in Ships

shipboard and offshore units, power, control, instrumentation,

telecommunication and data cables

IEC 60092-352 Electrical

of electrical cables

IEC 60092-353


non

rated voltage 1 kV and 3 kV

IEC 60092-354


power cables with extruded solid insulation for rated voltages 6 kV

(Um = 7,2kV) up to 30 kV (Um = 36 kV)


Shipboard Power and Telecommunication Cables


instrumentation circuits 150/250 V (300 V)

IEC 60099 Surge Arresters

IEC 60137 Bushings for Alternating Voltages Above 1000V

IEC 60146 Semiconductor converters

IEC 60228 Conductors of insulated cables

IEC 60255 Electrical relays (all parts relevant to Project application)

IEC 60269 Low

IEC 60270 Partial discharge measurements


FEED BOD FOR KNT

Electrical Apparatus for Explosive Gas Atmospheres.

Electrical Apparatus for Explosive Gas Atmospheres

resistance heat tracing.

Thermal evaluation and classification of electrical insulation

Electrical Installations in Ships - Part 350: Shipboard power

cables - General construction and test requirements

Electrical Installations in Ships - Part 351: Insulating materials for


telecommunication and data cables

Electrical Installations in Ships - Part 352: Choice and installation

of electrical cables

Electrical Installations in Ships - Part 353: Single and multi

non-radial field power cables with extruded solid insulation for

rated voltage 1 kV and 3 kV

Electrical Installations in Ships - Part 354: Single


(Um = 7,2kV) up to 30 kV (Um = 36 kV)

Electrical Installations in Ships - Part 359: Sheathing Materials for


Electrical Installations in Ships - Part 376: Cables for control and

instrumentation circuits 150/250 V (300 V)

Surge Arresters

Bushings for Alternating Voltages Above 1000V

Semiconductor converters

Conductors of insulated cables

Electrical relays (all parts relevant to Project application)

Low-voltage fuses

Partial discharge measurements

Electrical Apparatus for Explosive Gas Atmospheres.

Electrical Apparatus for Explosive Gas Atmospheres – Electrical

Thermal evaluation and classification of electrical insulation

Part 350: Shipboard power

General construction and test requirements

Part 351: Insulating materials for


Part 352: Choice and installation

Part 353: Single and multi-core

radial field power cables with extruded solid insulation for

Part 354: Single -and three-core


Part 359: Sheathing Materials for


Part 376: Cables for control and

Bushings for Alternating Voltages Above 1000V

Electrical relays (all parts relevant to Project application)



Page 13 of 53

IEC 60282 High

IEC 60287 Electric cables

IEC 60331 Fire resisting characteristics of electric cables

IEC 60332 Tests on electric cables under fire conditions

IEC 60391 Marking of insulated conductors

IEC 60404 Magnetic Materials (all parts relevant to Project application)

IEC 60439 Low voltage switchgear and control gear assemblies

IEC 61439 Low

Power switchgear and controlgear assemblies

IEC 60445

Basic and safety principles of man

and identification

-

IEC 60470 High

IEC 60502:2006 Extruded solid dielectric insulated power cables for rated voltages

from 1kV to 30 kV

IEC 60514 Acceptance Inspection of Class 2 Alternating Current Watthour

Meters

IEC 60529 Classification of Degrees of Protection Provided by

IEC 60664 Insulation co

IEC 60688 Electrical measuring transducer for converting A.C. electrical

quantities to analogue or digital signals

IEC 60754 Test on gases evolved during combustion

cables (Part 1 & Part 2)

IEC 60811 Common test methods for insulating and sheathing materials of

electric cables

IEC 60836 Specification for Silicone Liquids for Electrical Purposes

IEC 60885 Electrical test methods for electric cables


FEED BOD FOR KNT

High-voltage fuses

Electric cables – Calculation of the current rating

Fire resisting characteristics of electric cables

Tests on electric cables under fire conditions

Marking of insulated conductors

Magnetic Materials (all parts relevant to Project application)

Low voltage switchgear and control gear assemblies

Low-voltage switchgear and controlgear assemblies


Basic and safety principles of man-machine interface, marking

and identification

Identification of equipment terminals and conductor terminals

High-voltage A.C. contactors

Extruded solid dielectric insulated power cables for rated voltages

from 1kV to 30 kV

Acceptance Inspection of Class 2 Alternating Current Watthour

Meters

Classification of Degrees of Protection Provided by

Insulation co-ordination for equipment within low

Electrical measuring transducer for converting A.C. electrical

quantities to analogue or digital signals

Test on gases evolved during combustion of materials from

cables (Part 1 & Part 2)

Common test methods for insulating and sheathing materials of

electric cables

Specification for Silicone Liquids for Electrical Purposes

Electrical test methods for electric cables

Calculation of the current rating

Fire resisting characteristics of electric cables

Magnetic Materials (all parts relevant to Project application)

Low voltage switchgear and control gear assemblies

assemblies - Part 2:


machine interface, marking

Identification of equipment terminals and conductor terminals

Extruded solid dielectric insulated power cables for rated voltages

Acceptance Inspection of Class 2 Alternating Current Watthour

Classification of Degrees of Protection Provided by Enclosures

ordination for equipment within low-voltage systems

Electrical measuring transducer for converting A.C. electrical

of materials from

Common test methods for insulating and sheathing materials of

Specification for Silicone Liquids for Electrical Purposes



Page 14 of 53

IEC 60896 Stationary lead

methods of test & Part 22: Valve regulated types requirements)

IEC 60898-1 Circuitsimilar installations

IEC 60909 Short

IEC 60947 Low voltage switchgear and control gear

IEC 61000 Electromagnetic compatibility (EMC)

IEC 61034 Measurement of smoke density of electric cables burning under

defined conditions

IEC 61140 Protection against electric shock

installation and equipment

IEC 61204 Low voltage power and supply devices, DC output

characteristic

IEC 61515 Mineral insulated thermocouple cables and thermocouples

IEC 61850 Series Communication Networks and Systems in Substations

IEC 61892 Mobile and Fixed Offshore Units

relevant to Project application)

IEC 62040 Stabilized Power Supplies, D.C. Output

IEC 62271 High

Project application)

IEC 62305 Protection against Lightning

3.2 Other standards

API RP 14FZ

Design and Installation of Electrical Systems for Fixed and

Floating Offshore Petroleum Facilities

I, Zone 0, Zone 1 and Zone 2 Locations

IES Lighting Handbook

IES RP-12 Recommended Practice for Marine Lighting


FEED BOD FOR KNT

Stationary lead-acid batteries (Part 21: Valve regulated types


Circuit-breakers for overcurrent protection for household and similar installations

Short-circuit currents in three-phase A.C. systems

Low voltage switchgear and control gear

Electromagnetic compatibility (EMC)

Measurement of smoke density of electric cables burning under

defined conditions

Protection against electric shock – common aspects for

installation and equipment

Low voltage power and supply devices, DC output

characteristic

Mineral insulated thermocouple cables and thermocouples

Communication Networks and Systems in Substations

Mobile and Fixed Offshore Units - Electrical Installations

relevant to Project application)

Stabilized Power Supplies, D.C. Output

High-voltage switchgear and control gear (all parts relevant to

Project application)

Protection against Lightning


Floating Offshore Petroleum Facilities for Unclassified and Class

I, Zone 0, Zone 1 and Zone 2 Locations

Lighting Handbook

Recommended Practice for Marine Lighting

Valve regulated types


breakers for overcurrent protection for household and

. systems

Measurement of smoke density of electric cables burning under

common aspects for

Low voltage power and supply devices, DC output – Performance

Mineral insulated thermocouple cables and thermocouples

Communication Networks and Systems in Substations

Electrical Installations (all parts

(all parts relevant to


for Unclassified and Class



Page 15 of 53

CAP 437

Civil Aviation Authority (London) Offshore Helicopter Landing

Areas : A Guide to Criteria, Recommended

and Best Practices

NFPA 496 Standard for Purged and Pressurized Enclosures for Electrical

Equipment in Hazardous (Classified) Locations

NEMA MG 1 Motors and Generators

NEMA MG 2 Safety standard and guide for selection, installation an

electric motors and generators

NEMA VE 1 Metal Cable Tray Systems

NEMA VE 2 Cable Tray Installation Guidelines

IALA International Association of Lighthouse Authorities

NEK606 Cables for Offshore Installations Halogen Free, or Mud Resistant

NFPA 70 National Electrical Code (2011)

IEE Recommendations for the electrical and electronic equipment of

Mobile and Fixed offshore Installations

NFPA 780 Standard for the Installation of Lightning Protection Systems

IEEE std 32 Standard Requirements,

Neutral Grounding Devices

IEEE std 515

IEEE Standard for the Testing, Design, Installation, and

Maintenance of Electrical Resistance Trace Heating for Industrial

Applications

IEEE std 844 IEEE Recommended Practice

and Skin Effect Heating of Pipelines and Vessels

IEEE std 519 IEEE Recommended Practices and Requirements for Harmonic

Control in Electrical Power Systems

IEEE std 484

IEEE Recommended Practice for Installation Design

Installation of Vented Lead

Applications


FEED BOD FOR KNT


Areas : A Guide to Criteria, Recommended

and Best Practices

Standard for Purged and Pressurized Enclosures for Electrical


Motors and Generators

Safety standard and guide for selection, installation an

electric motors and generators

Metal Cable Tray Systems

Cable Tray Installation Guidelines

International Association of Lighthouse Authorities

Cables for Offshore Installations Halogen Free, or Mud Resistant

National Electrical Code (2011)

Recommendations for the electrical and electronic equipment of

Mobile and Fixed offshore Installations

Standard for the Installation of Lightning Protection Systems

Standard Requirements, Terminology, and Test Procedures for

Neutral Grounding Devices



Applications

IEEE Recommended Practice for Electrical Impedance, Induction,


IEEE Recommended Practices and Requirements for Harmonic

Control in Electrical Power Systems

IEEE Recommended Practice for Installation Design

Installation of Vented Lead-Acid Batteries for Stationary

Applications


Areas : A Guide to Criteria, Recommended Minimum Standards

Standard for Purged and Pressurized Enclosures for Electrical


Safety standard and guide for selection, installation and use of

International Association of Lighthouse Authorities

Cables for Offshore Installations Halogen Free, or Mud Resistant

Recommendations for the electrical and electronic equipment of

Standard for the Installation of Lightning Protection Systems

Terminology, and Test Procedures for



for Electrical Impedance, Induction,


IEEE Recommended Practices and Requirements for Harmonic

IEEE Recommended Practice for Installation Design and

Acid Batteries for Stationary



Page 16 of 53

IEEE std 485 IEEE Recommended Practice for Sizing Lead

Stationary Applications

IEEE std 142 IEEE Recommended Practice for Grounding of Industrial and

Commercia

IEEE std 242 IEEE Recommended Practice for Protection and Coordination of

Industrial and Commercial Power Systems

ISO 13702 Petroleum and natural gas industries

fires and explosions on offshore production

SOLAS 2004 Safety Of Life At Sea

DNV-OS-A101 Safety principles and Arrangements

DNV-OS-D201 Electrical Installations

DNV-OS-D202 Automation, Safety, and Telecommunication Systems (Oct. 2008)

The design and engineering of the electrical

the national and/or local authorities.

The electrical installation shall be suitable for the site conditions.

In the event of contradiction between the requirements of this document, IEC, ISO, NFPA,

NEMA, API, the particular IEC requirement shall prevail, provided the statutory obligations of

both local and national authorities of the Socialist Republic of Vietnam are satisfied.

4. ENVIRONMENT CONDITIO

All electrical equipment installed outdoors s

environment conditions. Electrical equipment installed indoors shall normally be operated in air

conditioned environment; however they shall be suitable for short time duty in the outdoor

environmental conditions prevailing at site, without temperature rise of any part of the electrical

equipment exceeding the maximum permissible temperature rise values stipulated in the

relevant IEC standards. The design environmental and climatic data are summarised below:

Atmosphere: Slat laden marine

Max Ambient Temperature:

Min Ambient Temperature: 20


FEED BOD FOR KNT

IEEE Recommended Practice for Sizing Lead

Stationary Applications

IEEE Recommended Practice for Grounding of Industrial and

Commercial Power Systems

IEEE Recommended Practice for Protection and Coordination of

Industrial and Commercial Power Systems

Petroleum and natural gas industries - Control and mitigation of

fires and explosions on offshore production installations

Safety Of Life At Sea

Safety principles and Arrangements

Electrical Installations

Automation, Safety, and Telecommunication Systems (Oct. 2008)

The design and engineering of the electrical installation shall satisfy all statutory requirements of

the national and/or local authorities.

The electrical installation shall be suitable for the site conditions.

In the event of contradiction between the requirements of this document, IEC, ISO, NFPA,



ENVIRONMENT CONDITIONS

All electrical equipment installed outdoors shall be suitable for operation on offshore



prevailing at site, without temperature rise of any part of the electrical



here: Slat laden marine

Max Ambient Temperature: 34.8 OC

Min Ambient Temperature: 20 OC

IEEE Recommended Practice for Sizing Lead-Acid Batteries for

IEEE Recommended Practice for Grounding of Industrial and

IEEE Recommended Practice for Protection and Coordination of

Control and mitigation of

installations

Automation, Safety, and Telecommunication Systems (Oct. 2008)

installation shall satisfy all statutory requirements of

In the event of contradiction between the requirements of this document, IEC, ISO, NFPA, DNV,



hall be suitable for operation on offshore



prevailing at site, without temperature rise of any part of the electrical





Page 17 of 53

Relative Humidity: Min: 47%; Mean 82%; Max 100%

Wind: Extreme Ws1-h =20.2 [m/s]

Indoor Design Temperature

With Air-conditioning : 2

Without Air-conditioning

5. ELECTRICAL EQUIPMENT

5.1 Operational safety and rel iabi l i ty

The design of the electrical installation shall be based on the provision of a safe and reliable

supply of electricity at all times. Safe conditions shall be ensured under all operating conditions,

including those associated with start

throughout the intervening shutdown periods. The design of electrical systems and equipment

shall ensure that all operating and maintenance activities can be performed safely. Provisions

for alternative supply sources and supply routes,

restarting schemes are required.

5.2 Standardizat ion of Equipment and Materials

Equipment of similar nature, identical components and construction should be of the same

manufacturer. This applies to

socket outlets and convenience

safety switch.

Standardization of materials and equipment shall be aimed for and compatible with rational

design. Equipment which will become obsolete in the near future shall not be selected.

5.3 Maintainabil i ty and Accessibil i ty

Electrical facilities shall be designed, constructed and installed so that components of the

facilities are accessible for maintenance and capable of bei

5.4 Protect ion against Explosion and Fire Hazard

The design of the electrical facilities and equipment shall be such as to minimize the risk of

explosion of fire due to the use of electricity where flammable liquid, vapour or gases ma

present. The type of protection shall be used based on certification definition of hazardous


FEED BOD FOR KNT

Relative Humidity: Min: 47%; Mean 82%; Max 100%

h =20.2 [m/s]

Indoor Design Temperature

conditioning : 24OC, +/- 2OC (E&I Room)

20OC, +/- 2OC (Battery Room)

conditioning : 40OC

ELECTRICAL EQUIPMENT AND HAZARDOUS AREA CLASSIFICATION

Operational safety and rel iabi l i ty



including those associated with start-up and shutdown of platform



for alternative supply sources and supply routes, spare/stand-by capacity and automatic

restarting schemes are required.

Standardizat ion of Equipment and Materials


manufacturer. This applies to MV switchgear, LV Switchgear/MCC, transformers,

and convenience socket outlets and luminaries, local control station, battery and


which will become obsolete in the near future shall not be selected.

Maintainabil i ty and Accessibil i ty


facilities are accessible for maintenance and capable of being repaired and replaced.

Protect ion against Explosion and Fire Hazard


explosion of fire due to the use of electricity where flammable liquid, vapour or gases ma


LASSIFICATION



and equipment, and



by capacity and automatic


MCC, transformers, welding

outlets and luminaries, local control station, battery and


which will become obsolete in the near future shall not be selected.


ng repaired and replaced.


explosion of fire due to the use of electricity where flammable liquid, vapour or gases may be




Page 18 of 53

areas. During FEED, Hazardous Area Classification shall be prepared based on

15. Electrical equipment should as far as is reasonably practicab

in the non-hazardous area. Electrical and Instrument Room shall be situated in a non

hazardous area.

Electrical equipment installed in hazardous area shall have a type of protection suitable for the

relevant zones and specified in accordance with IEC 60079.

Electrical equipment installed in indoor, non

standard industrial type as specified in the relevant equipment design requirements.

The following type of protection shall

Zone 1: All inherently non

protection ‘e’ (EEx’e’). All electric motors shall have type of protection ‘d’ (EEx’d’) or ‘de’

(EEx’de’). All inherently sparking equipment e.g. switchgear and control gear, shall have

type of protection ‘d’ (EEx’d’).

Zone 2: All electric motors and inherently non

protection ‘n’ (EEx’n’) for LV motors while EEx’d’ for

equipment shall have type of protection ‘d’ (EEx’d’) as stated for Zone 1.

For electrical apparatus in Zone 1 and Zone 2 areas, a certificate of conformity shall be

obtained from the Manufacturer.

The minimum equipment enclosure degree of in

accordance with IEC 60529 as follows:

IP42 for indoor Electrical Equipment

IP56 for Electric Motor

IP66 for outdoor use of small installation materials such as, but not limited to junction

boxes, lighting fixtures, c

The table below gives the summary of electrical equipment selection based on the area

classification requirements:

EQUIPMENT

TYPE ZONE 1

Gas Turbine Generator

N/A


FEED BOD FOR KNT

areas. During FEED, Hazardous Area Classification shall be prepared based on

. Electrical equipment should as far as is reasonably practicable and economical, be located

hazardous area. Electrical and Instrument Room shall be situated in a non


ied in accordance with IEC 60079.

Electrical equipment installed in indoor, non-hazardous areas within process areas shall be of a


The following type of protection shall be used for Zone 1 and Zone 2 areas, as a minimum:

Zone 1: All inherently non-sparking equipment, e.g. junction boxes shall have type of


ly sparking equipment e.g. switchgear and control gear, shall have

type of protection ‘d’ (EEx’d’).

Zone 2: All electric motors and inherently non-sparking equipment shall have type of

protection ‘n’ (EEx’n’) for LV motors while EEx’d’ for MV motors. Inher



obtained from the Manufacturer.

The minimum equipment enclosure degree of ingress protection to be used shall be in

accordance with IEC 60529 as follows:

IP42 for indoor Electrical Equipment

IP56 for Electric Motor


boxes, lighting fixtures, control stations


ZONE 1 ZONE 2 SAFE AREA EXPOSED

N/A N/A IP 54

areas. During FEED, Hazardous Area Classification shall be prepared based on latest IP Part

le and economical, be located

hazardous area. Electrical and Instrument Room shall be situated in a non-


hazardous areas within process areas shall be of a


be used for Zone 1 and Zone 2 areas, as a minimum:

sparking equipment, e.g. junction boxes shall have type of


ly sparking equipment e.g. switchgear and control gear, shall have

sparking equipment shall have type of

V motors. Inherently sparking



gress protection to be used shall be in



SAFE AREA INDOORS

IP 54



Page 19 of 53

EQUIPMENT

TYPE ZONE 1

Emergency Diesel Generator

N/A

MV Switchgear N/A

Transformers N/A

LV Bus Duct N/A

LV Switchgear/ Distribution Boards

N/A

MV Motors EEx'de', IIA, T3,

IP 56

LV Motors EEx'de', IIA, T3,

IP 56

MV VSD/Soft Starter

N/A

LV VSD/Soft Starter

N/A

Local control stations (LCS)

EEx'd' or EEx'de', IIA, T3,

IP 66

Lighting EEx'de' or EEx ‘ed’, IIA, T3 IP

66

Convenience Socket Outlets

EEx'de', IIA, T3, IP 66

Welding Socket Outlets


Electrical Junction Boxes

EEx'e', IIA, T3, IP 66

Battery Charger & UPS

N/A

Cable Glands EEx'de' (Nickelplated brass), IIA, T3, IP 66


FEED BOD FOR KNT


N/A N/A IP 56

N/A N/A N/A

N/A N/A IP 23

N/A N/A IP 55

N/A N/A IP 56





EEx'n', IIA, T3, IP 56

EEx'n', IIA (EEx'd', IIC for Battery Room Exhaust

Fans), T3, IP 56

N/A N/A N/A

N/A N/A N/A


IP 66


IP 66

EEx'd' or EEx'de', IIC, T3, IP 66

EEx'de' or EEx ‘ed’, IIA, T3 IP

66

EEx'de' or EEx ‘ed’, IIA, T3 IP

66

EEx'de' or EEx ‘ed’, IIA, T3 IP 66







EEx'de', IIA, T3, IP




N/A N/A N/A

EEx'de' (Nickel-plated brass), IIA, T3, IP 66

EEx'de' (Nickel-plated brass), IIA, T3, IP 66

EEx'de' (Nickel-plated brass), IIA,

T3, IP 66

SAFE AREA INDOORS

N/A

IP 42

IP 21

IP 55

IP 42

IP 56

IP 56

IP 42

IP 42

IP 66

N/A

IP 41, BS-1363 SQUARE 3-PIN

indoor type


N/A

IP 42

EEx'de' (Nickel-plated brass), IIA,

T3, IP 66



Page 20 of 53

EQUIPMENT

TYPE ZONE 1

Navigation Aids EEx'de', IIA, T3,

IP 66

Area classification drawing(s) shall be prepared based on

For the installation of electrical equipment in hazardous areas, IEC 60079

with and shall be certified by CENELEC, BASEEFA, PTB, CSI, FM, CSA approved authority or

equivalent acceptable to KNT.

For the installation of electrical equipment in hazardous areas, IEC 60079 shall be complied

with.

The detail type and hazardous are rating of the electrical equipment specified are as per

tabulated in the electrical bulk material sheet. Where electrical equipment is to b

hazardous areas, equipment with a type of protection suitable for the relevant Class and Zone

of hazard will be selected and specified.

6. ELECTRICAL SYSTEM DE

6.1 General

The design of electrical installation shall be based on the above fundamental principles. Fit for

purpose and package design shall be aimed for. It shall be commensurate with the design

criteria philosophy and/ or objective that stated in the project defin

specification.

6.2 System Voltage

The voltages have been selected in accordance with IEC 60038

process and utilities platform

adopted to ensure standardisation as below:

Generation voltages and frequency:

MV generation : 6.6kV, 3-phase, 3

LV generation : 400/230V, 3

Distribution/Utilization voltages and frequency:


FEED BOD FOR KNT





Area classification drawing(s) shall be prepared based on latest IP Part 15 issue.

For the installation of electrical equipment in hazardous areas, IEC 60079


equivalent acceptable to KNT.

tion of electrical equipment in hazardous areas, IEC 60079 shall be complied


tabulated in the electrical bulk material sheet. Where electrical equipment is to b


of hazard will be selected and specified.

ELECTRICAL SYSTEM DESIGN



criteria philosophy and/ or objective that stated in the project definition phase, and/ or project

The voltages have been selected in accordance with IEC 60038 to suit the requirement of

platform. The following voltage levels for electrical equipment shall be

adopted to ensure standardisation as below:

Generation voltages and frequency:

phase, 3-wire, 50Hz

400/230V, 3-phase, 4-wire, 50Hz

Distribution/Utilization voltages and frequency:

SAFE AREA INDOORS

EEx'd'/EEx'e', IP 42

latest IP Part 15 issue.

For the installation of electrical equipment in hazardous areas, IEC 60079-14 shall be complied


tion of electrical equipment in hazardous areas, IEC 60079 shall be complied


tabulated in the electrical bulk material sheet. Where electrical equipment is to be installed in




ition phase, and/ or project

to suit the requirement of

. The following voltage levels for electrical equipment shall be



Page 21 of 53

MV System : 6.6kV, 3-phase, 3

LV System : 400/230V, 3

: 230V, 1-phase, 2

6.3 Equipment Operating Voltages

The system details at various utilization equipm

Service

MV Main Power Generator

MV Power Distribution

LV Motors (200kW and below)

Emergency Power Generator

LV Power distribution

Lighting & Small Power

Uninterruptible Power Supply

Navigational Aids

Helideck Lights, Aviation

Obstruction Lights

ICSS (PCS, ESD, FGS

Address and Alarm (PAGA) System

Gas Turbine/Gas

Generator Control Panel, Turbine

compressor control paneland

critical mechanical package control

panel


FEED BOD FOR KNT

phase, 3-wire, 50Hz

400/230V, 3-phase, 4-wire, 50Hz

phase, 2-wire, 50Hz

Equipment Operating Voltages

The system details at various utilization equipment voltages shall be as given below:

Service Voltage

V Main Power Generator 6.6kV 50Hz , 3

V Power Distribution 6.6kV 50Hz , 3

LV Motors (200kW and below) 400V 50Hz , 3

Emergency Power Generator 400V 50Hz , 3

LV Power distribution 400V 50Hz , 3

Lighting & Small Power 230V 50Hz , 1

Uninterruptible Power Supply Voltage

24V Dedicated DC UPS

Lights, Aviation 230V AC UPS, 50Hz , 1

CS, ESD, FGS), Public

Address and Alarm (PAGA) System 230V

AC UPS, 50Hz , 1

(Redundant)

Gas Engine/Diesel

Generator Control Panel, Turbine

compressor control paneland

critical mechanical package control

230V AC UPS, 50Hz , 1

ent voltages shall be as given below:

Phase

50Hz , 3-phase, 3-wire






Phase

Dedicated DC UPS

AC UPS, 50Hz , 1-phase, 2-wire


(Redundant)




Page 22 of 53

Telecommunication

VCB & ACB tripping/closing circuit,

and protective relays

signalization

Note 1: Any other required

6.4 Voltage and Frequency Var iat ion

The electrical system shall be designed based on the following

a) Under steady state conditions the voltages at all points on the system should be held

constant within a tolerance of ±5% of the nominal voltage and the frequency should not

deviate from the rated frequency by more than ±2%.

b) Transient voltage depr

motor starting/acceleration shall be such as to maintain a minimum of 85% rated voltage

on switchgear busbars, and at least 80%, but not more than 115%, of rated equipment

voltage on all other consumers. Transient frequency variation shall not be more than +10

% of rated frequency.

c) During starting or reacceleration of a motor, either alone or in a group, the voltage at the

motor terminals, shall not vary more than plus 10% and minus 20% from rat

d) For DC power system, supply voltage at equipment terminals shall not deviate from

rated voltage by +5% and

e) For AC UPS system, output voltage shall not deviate from rated voltage by +5% and

5% during steady state while output frequency sha

of rated frequency.

f) The power system shall be designed to meet the requirement of Total Harmonic

Distortion (THD) less than 5%.

6.5 Spare and contingency

Unless otherwise specified by Company, minimum

be applied for sizing of various AC power supply equipment in

factor is not applicable for any equipment, a technical query to specify different factor for power

supply equipment shall be submitted to Company for approval. In addition, 10% to 20% of spare

hardware shall be provided for

distribution board.


FEED BOD FOR KNT

230V AC UPS, 50Hz , 1

VCB & ACB tripping/closing circuit,

and protective relays and 230V AC UPS, 50Hz , 1

(Refer Note 1)

: Any other required operating voltage should be derived internally by Manufacturer

Voltage and Frequency Var iat ion

The electrical system shall be designed based on the following criteria:

Under steady state conditions the voltages at all points on the system should be held


deviate from the rated frequency by more than ±2%.

Transient voltage depressions occurring at switchgear bus bars during motor or group



consumers. Transient frequency variation shall not be more than +10

During starting or reacceleration of a motor, either alone or in a group, the voltage at the

motor terminals, shall not vary more than plus 10% and minus 20% from rat

For DC power system, supply voltage at equipment terminals shall not deviate from

rated voltage by +5% and -5%.

For AC UPS system, output voltage shall not deviate from rated voltage by +5% and

5% during steady state while output frequency shall be maintained within +2% and

The power system shall be designed to meet the requirement of Total Harmonic

Distortion (THD) less than 5%.

Spare and contingency

Unless otherwise specified by Company, minimum 20% factor for spare and contingency shall

be applied for sizing of various AC power supply equipment in FEED stage. Since any above


e submitted to Company for approval. In addition, 10% to 20% of spare

hardware shall be provided for each type of feeders and motor starters in Switchgear



(Refer Note 1)

voltage should be derived internally by Manufacturer.

Under steady state conditions the voltages at all points on the system should be held


essions occurring at switchgear bus bars during motor or group



consumers. Transient frequency variation shall not be more than +10

During starting or reacceleration of a motor, either alone or in a group, the voltage at the

motor terminals, shall not vary more than plus 10% and minus 20% from rated voltage.

For DC power system, supply voltage at equipment terminals shall not deviate from

For AC UPS system, output voltage shall not deviate from rated voltage by +5% and -

ll be maintained within +2% and -2%

The power system shall be designed to meet the requirement of Total Harmonic

0% factor for spare and contingency shall

stage. Since any above


e submitted to Company for approval. In addition, 10% to 20% of spare

Switchgear and power



Page 23 of 53

7. LOAD ASSESSMENT AND

A schedule of the installed electrical loads, the maximum normal running load and the peak

load, expressed in kilo-watt, kilo

operating under the site conditions specified, shall be prepared.

It shall be completed and updated regularly throughout the design stage of the project and shall

form the basis for provision of the necessary electricity supply and distribution system capacity.

The load list details loads for each consumer on the basis of the consumer being a cont

intermittent or standby duty category load, defined as follows:

Continuous: Consumers which are normally running / energised for 24

hours per day, 365 days per year.

Intermittent: Consumers in service on an intermittent basis.

Standby: C

permanent basis and installed spares.

The electrical load is calculated using the following formula:

Maximum Running Load = 100% all continuous loads + either (30% intermittent load or

largest ind

Peak Running Load = Maximum Running Load + either (largest individual standby

load or 10% total standby, whichever is larger)

Total Required Load = 12


There are two scenarios for main power generators at the beginning of the conceptual

engineering. The optimized option will be selected during FEED.


There shall be two (2) nos. of gas turbine driven main po

Each of the main power generators shall be sized to cater for 100% of the total (ultimate) load of

the KNT during normal operation. Hence, one of the two main power generator shall act as the

duty machine, the remaining unit


FEED BOD FOR KNT

LOAD ASSESSMENT AND ELECTRICITY CONSUMPTION

electrical loads, the maximum normal running load and the peak

watt, kilo-VAr and kilo-VA and based on the facility design capacity when

operating under the site conditions specified, shall be prepared.

pdated regularly throughout the design stage of the project and shall


The load list details loads for each consumer on the basis of the consumer being a cont

intermittent or standby duty category load, defined as follows:

Consumers which are normally running / energised for 24

hours per day, 365 days per year.

Consumers in service on an intermittent basis.

Consumers connected but not normally energised on a

permanent basis and installed spares.

The electrical load is calculated using the following formula:

100% all continuous loads + either (30% intermittent load or

largest individual intermittent load, whichever is larger

Maximum Running Load + either (largest individual standby


120% of Peak Operating Load (20% contingency).

Power Generators


The optimized option will be selected during FEED.

: Gas Turbine Generators

There shall be two (2) nos. of gas turbine driven main power generators (n + 1) on


during normal operation. Hence, one of the two main power generator shall act as the

duty machine, the remaining unit will act as the “cold” standby machine.

ION

electrical loads, the maximum normal running load and the peak

VA and based on the facility design capacity when

pdated regularly throughout the design stage of the project and shall


The load list details loads for each consumer on the basis of the consumer being a continuous,

Consumers which are normally running / energised for 24

Consumers in service on an intermittent basis.

onsumers connected but not normally energised on a

100% all continuous loads + either (30% intermittent load or

ividual intermittent load, whichever is larger)

Maximum Running Load + either (largest individual standby


% contingency).


wer generators (n + 1) on KNT.


during normal operation. Hence, one of the two main power generator shall act as the



Page 24 of 53

The main power generation shall be capable of fulfilling at least the following specific

requirements:

a) Supplying maximum load and simultaneously starting the largest motor load, with the

spare unit inoperative in acc

b) Maintaining the stability of the electrical system in response to step changes in load or

available power.

c) Maintain adequate spare capacity for known future loads as shown in electrical load list

and mechanical equipment

Main power generator plant site rating should be capable of sustaining at least 120% of the

calculated “peak load”.

The two main power generators installed shall have gas fuel capability of using treated well gas

as fuel.

7.1.2 Option 2: Gas Engine

The platform main power generation shall be by 1 x 100% Gas Engine Generator. During

normal operation, the Gas Engine Generator shall provide 400VAC power to cater for all type of

platform loads i.e. utilities loads, telecommunication loads, inst

power distribution, heat tracing, etc.

Diesel Generator shall be automatically start up.

The main generator on KNT WHP

Generation shall be at 400V, 3 phase, 4 wire, 50Hz.

Rated power shall be sized at 1

Starting requirement of the largest motor, with normal operating (running) essential load

shall be considered while sizing th

UCP of EDG shall be provided for synchronizing facilities and load sharing between GEG and

EDG. Provision of permanent loadbank may require to cater for minimum loading of both

GEG&EDG.

7.2 Distr ibut ion Transformers

If option 1 is selected, Dry type cast resin distribution transformers shall be used. Two

distribution transformers feeding into each main LV


FEED BOD FOR KNT


Supplying maximum load and simultaneously starting the largest motor load, with the

spare unit inoperative in accordance with the load list summary.

Maintaining the stability of the electrical system in response to step changes in load or

Maintain adequate spare capacity for known future loads as shown in electrical load list

and mechanical equipment list.



: Gas Engine Generator



loads, telecommunication loads, instrument loads, lightings and small

, heat tracing, etc. During failure of the Gas Engine Generator, the

Diesel Generator shall be automatically start up.

generator on KNT WHP shall be designed in accordance with the foll

Generation shall be at 400V, 3 phase, 4 wire, 50Hz.

shall be sized at 120% of the platform peak load.


shall be considered while sizing the generator.

G shall be provided for synchronizing facilities and load sharing between GEG and

Provision of permanent loadbank may require to cater for minimum loading of both

Distr ibut ion Transformers

Dry type cast resin distribution transformers shall be used. Two

distribution transformers feeding into each main LV Switchgear and shall be rated for 2 x 100%


Supplying maximum load and simultaneously starting the largest motor load, with the

Maintaining the stability of the electrical system in response to step changes in load or

Maintain adequate spare capacity for known future loads as shown in electrical load list





rument loads, lightings and small

During failure of the Gas Engine Generator, the Emergency

shall be designed in accordance with the following criteria:


G shall be provided for synchronizing facilities and load sharing between GEG and

Provision of permanent loadbank may require to cater for minimum loading of both

Dry type cast resin distribution transformers shall be used. Two

and shall be rated for 2 x 100%



Page 25 of 53

configuration – i.e. Both operating transformers shall be capable of catering to at least 100% o

the entire main LV Switchgear

Transformers shall be sized to handle the tabulated peak operating

capacity.

For option 2, MV/LV transformer is not required for the platform.

7.3 Emergency Power Generator

In the event of loss of mains power supply from all the main power generators, emergency

electrical power to the KNT will be supplied by an emergency power generator. The emergency

power generator shall be sized to cater for all the life support loads, essential process

loads plus black-starting loads (i.e. those necessary to allow restarting of the first main power

generator).

The emergency power generator shall have battery start (primary) and hydraulic (secondary)

start facilities.

The emergency power generator shall have additional at least 20% spare capacity of the

calculated emergency ‘peak load’ in anticipation for future load growth.

7.4 Other Electr ical Equipment

Unless otherwise specified, other electrical not identified on the above shall be sized bas

the peak load plus 20% spare capacity.

7.5 Short Circuit Rat ings

All equipment shall be capable of withstanding the effects of short circuit currents and

consequential voltages arising in the event of equipment or circuit faults.

The short circuit ratings of equipment and cables, including the short circuit making and

breaking capacity of circuit switching devices, shall be based on parallel operations of all

supplies which can be paralleled during normal

that can be expected from the connected load.

The use of current-limiting reactors, Is

means of limiting the magnitude of short circuit currents shall not be used.

8. ELECTRICAL POWER GEN

8.1 Power Generat ion System Operat ion


FEED BOD FOR KNT

i.e. Both operating transformers shall be capable of catering to at least 100% o

Switchgear load.

Transformers shall be sized to handle the tabulated peak operating load, plus 20% spare

For option 2, MV/LV transformer is not required for the platform.

Emergency Power Generator

s power supply from all the main power generators, emergency

will be supplied by an emergency power generator. The emergency

power generator shall be sized to cater for all the life support loads, essential process

starting loads (i.e. those necessary to allow restarting of the first main power


erator shall have additional at least 20% spare capacity of the

calculated emergency ‘peak load’ in anticipation for future load growth.

Other Electr ical Equipment

Unless otherwise specified, other electrical not identified on the above shall be sized bas

the peak load plus 20% spare capacity.

Short Circuit Rat ings


consequential voltages arising in the event of equipment or circuit faults.

s of equipment and cables, including the short circuit making and


supplies which can be paralleled during normal-operations; it will also include the contribution

that can be expected from the connected load.

limiting reactors, Is-limiters and similar devices intended specifically as a

means of limiting the magnitude of short circuit currents shall not be used.

ELECTRICAL POWER GENERATION AND DISTRIBUTION SYSTEM

Power Generat ion System Operat ion

i.e. Both operating transformers shall be capable of catering to at least 100% of

load, plus 20% spare

s power supply from all the main power generators, emergency

will be supplied by an emergency power generator. The emergency

power generator shall be sized to cater for all the life support loads, essential process and utility

starting loads (i.e. those necessary to allow restarting of the first main power


erator shall have additional at least 20% spare capacity of the

Unless otherwise specified, other electrical not identified on the above shall be sized based on


s of equipment and cables, including the short circuit making and


operations; it will also include the contribution

limiters and similar devices intended specifically as a

DISTRIBUTION SYSTEM



Page 26 of 53

Option 1: the main generationon the platform

50 Hz, 3-phase to cater all loads

Option 2: the main power generation shall be by 1 x 100% Gas Engine

50Hz, 3-phase,4wire to cater all utilities loads.

Emergency power shall be provided at 400/230V, 50

Diesel Generator.

8.2 Power Distr ibut ion

The power distribution system philosophy requires electrical sy

maximize flexibility, reliability and maintainability. The ultimate goal during distribution system

design is to allow for reliable process operation concurrent with ongoing isolation and

maintenance of selected parts of the electri

The project distribution system voltages shall be as follows:

a) 6.6 kV, 50Hz, 3-phase, 3

generation and distribution

grounded wye shall be utilised for power generation and distribution

b) 400/230V, 50Hz, 3-phase, 4

to motor control centres;

c) 230V, 50 Hz, 1-phase, 2

telecommunication, control loads

The design of low voltage (400/230V, 50Hz, 3

provided with both main bus sections and emergency bus sections. An auto

system shall transfer power supply from main generator (normal) supply to emergency

generator supply and vice versa (re

by “make-before-break” principle so as to realise a no

available.

9. DESIGN AND SELECTION

Design life for all facilities shall be

proven offshore field experience with good client reference. All equipment/material shall be

sourced from the well-known Manufacturer which had been approved by

Separate E&I room, Transform


FEED BOD FOR KNT

Option 1: the main generationon the platform shall consist of 2 x 100% gas turbine driven 6.

to cater all loads.

main power generation shall be by 1 x 100% Gas Engine

to cater all utilities loads.

all be provided at 400/230V, 50Hz, 3-phase, 4wire by an Emergency

The power distribution system philosophy requires electrical systems to be designed to



maintenance of selected parts of the electrical system.

The project distribution system voltages shall be as follows:

phase, 3-wire, low resistance grounded wye shall be utilised for power

generation and distribution for option 1 or 400/230V, 50Hz, 3-

wye shall be utilised for power generation and distribution

phase, 4-wire, solidly grounded wye shall be utilised for distribution

to motor control centres;

phase, 2-wire un-grounded shall be supplied

telecommunication, control loads.

The design of low voltage (400/230V, 50Hz, 3-phase, 4-wire) power distribution system shall be

provided with both main bus sections and emergency bus sections. An auto

er supply from main generator (normal) supply to emergency

generator supply and vice versa (re-transfer). Both “Transfer” and “re-transfer” shall be effected

break” principle so as to realise a no-break transition - when both sources are

DESIGN AND SELECTION OF ELECTRICAL EQUIPMENT

Design life for all facilities shall be 15 years. Equipment/materials must have at least 2 years of


Manufacturer which had been approved by Company

room, Transformer room and Battery room shall be provided.

shall consist of 2 x 100% gas turbine driven 6.6kV,

main power generation shall be by 1 x 100% Gas Engine Generator, 400/230V,

phase, 4wire by an Emergency

stems to be designed to



wire, low resistance grounded wye shall be utilised for power

-phase, 4-wire, solidly

wye shall be utilised for power generation and distribution for option 2.

wire, solidly grounded wye shall be utilised for distribution

supplied for instrumentation,

wire) power distribution system shall be

provided with both main bus sections and emergency bus sections. An auto-transfer switch

er supply from main generator (normal) supply to emergency

transfer” shall be effected

when both sources are

ENT

years. Equipment/materials must have at least 2 years of


Company.

er room and Battery room shall be provided.



Page 27 of 53



The 6.6kV, 2x100% dual fuel gas

The generators shall be of synchronous, brushless, 4 salient pole, cylindrical rotor

for continuous duty type S1 in accordance with IEC 60034

air circuit, self-cooling type or open drip proof type. Both GTGs shall be provided with dual fuel

facilities.

The GTG package will be located in a

an additional protection, the generator & turbine / generator electrical & instrumentation devices,

terminal boxes and all associated accessories shall be certified and shall be suitable for

operation / installation in hazardous area, classified as Zone 2, Gas Group IIA and Temperature

Classification T3. This is in accordance with the recommendations outlined in IP Part 15.

Main electrical generation shall be derived from one of the two GTGs operating

phase, 50Hz. During normal operating condition only one GTG set shall be in service to cater

for the total power requirement for KNT platform with the second GTG set in standby.

Consequently, the GTGs shall be provided with automatic and manua

and shall be capable of parallel operation.

The main power generators shall each be furnished a package comprising an enclosed skid

mounted turbine driver/generator assembly and a remotely mounted PLC based unit control

panel (GCP) complete with all controls, governors, automatic voltage regulator and ancillary

equipment.

Gas Turbine Generator shall be suitable for operation

a) In stand-alone operation

b) Synchronize and load sharing

c) Synchronize and load sharing

power transfer from GTG to EDG or vice versa.

Generator performance is following as:

- Rate phase to phase voltage:

- Number of phase : 03 Phases

- Frequency


FEED BOD FOR KNT

Main Power Generators

1: Gas Turbine Generators

kV, 2x100% dual fuel gas turbine generators shall be designed.

The generators shall be of synchronous, brushless, 4 salient pole, cylindrical rotor

for continuous duty type S1 in accordance with IEC 60034-1 and either totally enclosed, closed

cooling type or open drip proof type. Both GTGs shall be provided with dual fuel

The GTG package will be located in a safe area (where possible) on the platform. However, as



n / installation in hazardous area, classified as Zone 2, Gas Group IIA and Temperature


Main electrical generation shall be derived from one of the two GTGs operating



Consequently, the GTGs shall be provided with automatic and manual synchronising facilities

and shall be capable of parallel operation.



P) complete with all controls, governors, automatic voltage regulator and ancillary

Generator shall be suitable for operation mode:

alone operation

Synchronize and load sharing with the other main power generators

ze and load sharing with the emergency generator for short duration during

power transfer from GTG to EDG or vice versa.


Rate phase to phase voltage: 6.6kV

Number of phase : 03 Phases, start connected

: 50 HZ

The generators shall be of synchronous, brushless, 4 salient pole, cylindrical rotor type suitable

1 and either totally enclosed, closed

cooling type or open drip proof type. Both GTGs shall be provided with dual fuel

safe area (where possible) on the platform. However, as



n / installation in hazardous area, classified as Zone 2, Gas Group IIA and Temperature


Main electrical generation shall be derived from one of the two GTGs operating at 6.6kV, 3-



l synchronising facilities



P) complete with all controls, governors, automatic voltage regulator and ancillary

with the other main power generators

for short duration during



Page 28 of 53

- Rated power factor

- System earthing:Earthed

fault current.

- Auxiliaries system

power and normal)


The main power generation shall be 400V, 3phase, 4 wire, 50Hz gas engine generator. Upon

loss of GEG, the EDG shall automatically start to cater to the entire platform load

Switchgear bus is automatically energised by the

Stopping of the EDG shall be manual. At any time, if necessary, the

operated in parallel.

Power Management Panel shall be provided for synchronizing fa

between GEG and EDG The standby diesel generator shall be auto

engine generator before connected to the loads.

The Gas Engine Generator skid shall be installed in outdoor non

The gas engine generator shall be provided with primary electric starting (battery

bank/charger).A common back

EDG.


- Rate phase to phase voltage:

- Number of phase : 03 Phases

- Frequency

- Rated power factor

- System earthing: solid earth

- Auxiliaries system

Phase 50 Hz from UPS

Main power generator plant site rating should be capable of sustaining at 120% of the

load.

9.2 MV Switchgear

The MV switchgear shall be designed and constructed in accordance with the requirements of

the latest edition of IEC 62271


FEED BOD FOR KNT

Rated power factor : 0.8

rthed with dedicated Neutral Ground Resistor (N

Auxiliaries system : 400V AC, 3 phase, 50 HZ and 230VAC, 1 Phas

Option 2: Gas Engine Generator


G shall automatically start to cater to the entire platform load

bus is automatically energised by the EDG, the loads shall be restored manually.

G shall be manual. At any time, if necessary, the ED

Power Management Panel shall be provided for synchronizing facilities and load sharing

G The standby diesel generator shall be auto -synchronized with the gas

engine generator before connected to the loads.

The Gas Engine Generator skid shall be installed in outdoor non-hazardous classification are


bank/charger).A common back-up hydraulic starting system shall be provided for both GEG and


Rate phase to phase voltage: 400/VAC

Number of phase : 03 Phases, 4 wire

: 50 HZ

Rated power factor : 0.8

solid earth.

Auxiliaries system : 400V AC, 3 phase, 50 HZ normal supply

UPS

Main power generator plant site rating should be capable of sustaining at 120% of the


the latest edition of IEC 62271-200. The MV switchgear shall consist of “cassette

Resistor (NGR) to limit earth

0VAC, 1 Phase 50 Hz (UPS


G shall automatically start to cater to the entire platform loads. After the LV

G, the loads shall be restored manually.

EDG and GEG may be

cilities and load sharing

synchronized with the gas

hazardous classification area.


up hydraulic starting system shall be provided for both GEG and

normal supply and 230VAC, 1

Main power generator plant site rating should be capable of sustaining at 120% of the peak


“cassette-type" vacuum



Page 29 of 53

circuit breakers (VCB) for generator incomers, bustie, tran

switching devices shall be of withdrawable type.

The MV switchgear shall be suitable for operation in

requirements:

- Supply system: 6.6 kV, 3 phase, 50 hz, 3 wire

- System fault level : (*)

- Busbar rating : (*)

- Auxiliary supply : 230V from UPS

Any other required operating voltage should be derived internally by Manufacturer

The design of the MV switchgear shall be fully tested and certified for fault and duty rating by a

recognized and approved independent international testing laboratory.

The MV switchgear shall be totally sheet metal enclosure, free standing, floor mounted pane

of single front, dead front construction, withdrawable construction and fully compartmentalised

arrangement. Facility for future extension at both ends shall be provided. Cable entry shall be

from the top.

Interfacing required with the SDS and IMCS for

hardwired connection and via serial link. Any interposing voltage, or signals requiring the

interposing relays, Breaker Control Relay, G

Relay, Feeder Management R

The MV switchgear shall be suitable for indoor installation in an air

degree of ingress protection shall be to IP 42.

Anti-condensation heaters shall be provided

Each of the MV circuit protection, control and monitoring devices shall employ the intelligent

microprocessor based technology. The switchgear shall be intelligently linked with an IMCS

which will offer an integrated protection, control

communication via serial link with remote process control and instrumentation ICSS and to the

remote GTG UCP and VFD/ Soft Starter panels as appropriate.

9.3 Distr ibut ion Transformer


FEED BOD FOR KNT

circuit breakers (VCB) for generator incomers, bustie, transformer, and outgoings feeders.

switching devices shall be of withdrawable type.

The MV switchgear shall be suitable for operation in accordance with the following

Supply system: 6.6 kV, 3 phase, 50 hz, 3 wire

230V from UPS

Any other required operating voltage should be derived internally by Manufacturer

design of the MV switchgear shall be fully tested and certified for fault and duty rating by a

recognized and approved independent international testing laboratory.

The MV switchgear shall be totally sheet metal enclosure, free standing, floor mounted pane



Interfacing required with the SDS and IMCS for control and monitoring shall be respectively via


interposing relays, Breaker Control Relay, Generator Management Relay

Relay, I/O, and terminals shall be installed in the marshalling panel.

The MV switchgear shall be suitable for indoor installation in an air-conditioned room. Minimum

degree of ingress protection shall be to IP 42.

condensation heaters shall be provided for each cubicle.



which will offer an integrated protection, control and monitoring functions suitable for


remote GTG UCP and VFD/ Soft Starter panels as appropriate.

Distr ibut ion Transformer

sformer, and outgoings feeders. All

accordance with the following

Any other required operating voltage should be derived internally by Manufacturer.

design of the MV switchgear shall be fully tested and certified for fault and duty rating by a

The MV switchgear shall be totally sheet metal enclosure, free standing, floor mounted panels



control and monitoring shall be respectively via


elay, Motor Management

, I/O, and terminals shall be installed in the marshalling panel.

conditioned room. Minimum



and monitoring functions suitable for




Page 30 of 53

Distribution transformers shall be

designed and constructed in accordance with the Specification for Distribution Transformer and

Datasheet for Distribution Transformer which will prepared during FEED.

Passive protection against thermal

to a local detection relay for interfacing with the primary circuit breaker feeder protection relay

located at MV switchgear.

The distribution transformer base

Transformer configurations are as follows:

Primary system

Secondary system

Neutral wye point

Winding insulation /

temperature rise

Method of cooling

Vector group

Tapping

The distribution transformers shall be installed in a pressurized /force

room and shall be suitable for continuous operation at

Distribution transformers shall be provided with louvered factory

minimum ingress protection of

9.4 Neutral Grounding Resistor

Facilities shall be provided to earth 6.6kV generators via a grounding resistor designed to limit

the generating system earth fault current will developed during FEED. The neutral of each main

power generator shall be connected to their dedicated NGR.

During normal operation both generators’ star

The NGR shall be the rustless

ingress protection of IP 23.

9.5 Emergency Diesel Generator


FEED BOD FOR KNT

Distribution transformers shall be double copper wound fully “cast-resin” type units and


Datasheet for Distribution Transformer which will prepared during FEED.

Passive protection against thermal overload shall be by winding embedded RTD’s that are wired


The distribution transformer base-rating shall be derived from natural cooling (i.e. AN);

Transformer configurations are as follows:

: 6.6kV, 50 Hz, 3-phase, 3-wire

: 400V, 50 Hz, 3-phase, 4-wire

: Solidly grounded

: Class F / Class B

: AN

: Dyn11

: Manual, off-circuit, 5 steps at ±2.5 % steps

The distribution transformers shall be installed in a pressurized /force-ventilated transformer

room and shall be suitable for continuous operation at full load (under site conditions).

Distribution transformers shall be provided with louvered factory-installed safety enclosure with

of IP23 for safe area exposed.

Neutral Grounding Resistor (NGR)



power generator shall be connected to their dedicated NGR.

ring normal operation both generators’ star-points shall be grounded through the NGR.

shall be the rustless-unbreakable grid type in protected enclosure with minimum

Emergency Diesel Generator

resin” type units and


overload shall be by winding embedded RTD’s that are wired


cooling (i.e. AN);

circuit, 5 steps at ±2.5 % steps

ventilated transformer

full load (under site conditions).

installed safety enclosure with



points shall be grounded through the NGR.

unbreakable grid type in protected enclosure with minimum



Page 31 of 53

The 400/230V emergency pow

with the Specification for Emergency Diesel Generator Packageand Datasheet for Emergency

Diesel Generator which will be prepared during FEED.

A diesel engine driven Emergency Power Generator shal

3-phase, 4-wire, 0.8 power factor, neutral solidly grounded. The emergency power generator

package shall be furnished as a skid mounted package (consisting of prime mover, cooling

system, dual starting systems, exhaust

316L stainless steel clad weather

housed in a GCP consisting of the controls, speed governor, automatic voltage regulator shall

be installed remotely in the E&I

Facilities for automatic start, test, synchronize and prolonged operation in parallel with the main

power generator shall be provided. The emergency diesel generator shall capable of continuous

parallel operation with the main power generators for weekly o

The Emergency Power Generator itself shall have battery start system and hydraulic start

system as primary and secondary starting facilities respectively.

The final rating of the emergency diesel generator shall be sele

criteria, but not limited to these items:

a) Able to support all the process and utility emergency loads

b) Able to power up all life support systems

c) All Black starting loads (for starting

9.6 400V LV Switchgear

LV switchgear shall be design and constructed in accordance with the requirements of

edition of IEC 60439, IEC 61439 and IEC 60529

Datasheet for LV Switchgear/MCC which will be prepared

Low voltage type tested factory

access, self-supporting, with bottom cable entry and fully compartmentalised multi

assembly of heavy industrial type. It should be “fully

separation shall be based on Form 3b, Type 2 construction (minimum standard). The floor or

deck-plate (below the Switchgear

Motor starters and outgoing feede


FEED BOD FOR KNT

The 400/230V emergency power generator shall be designed and constructed in accordance


Diesel Generator which will be prepared during FEED.

A diesel engine driven Emergency Power Generator shall be provided, rated 400/230V, 50Hz,

wire, 0.8 power factor, neutral solidly grounded. The emergency power generator


system, dual starting systems, exhaust system, ventilation system and alternator) housed in a

316L stainless steel clad weather-proof / acoustic enclosure. The balance of equipment shall be


E&I room.



parallel operation with the main power generators for weekly on load testing and maintenance.


system as primary and secondary starting facilities respectively.

The final rating of the emergency diesel generator shall be selected to cater for the following

criteria, but not limited to these items:

Able to support all the process and utility emergency loads

Able to power up all life support systems

All Black starting loads (for starting-up one main power generator)

Switchgear/MCC

LV switchgear shall be design and constructed in accordance with the requirements of

IEC 61439 and IEC 60529, the Specification for LV Switchgear/MCC and

Datasheet for LV Switchgear/MCC which will be prepared during FEED.

Low voltage type tested factory-built assemblies shall be completely metal enclosed, front

supporting, with bottom cable entry and fully compartmentalised multi

assembly of heavy industrial type. It should be “fully withdrawable and modular”, and internal


Switchgear) shall not be considered as being part of the enclosure.

Motor starters and outgoing feeder modules shall be ‘full-width’.

er generator shall be designed and constructed in accordance


l be provided, rated 400/230V, 50Hz,

wire, 0.8 power factor, neutral solidly grounded. The emergency power generator


system, ventilation system and alternator) housed in a

proof / acoustic enclosure. The balance of equipment shall be




n load testing and maintenance.


to cater for the following

LV switchgear shall be design and constructed in accordance with the requirements of the latest

the Specification for LV Switchgear/MCC and

built assemblies shall be completely metal enclosed, front

supporting, with bottom cable entry and fully compartmentalised multi-cubicle

withdrawable and modular”, and internal-


) shall not be considered as being part of the enclosure.



Page 32 of 53

The low voltage assemblies shall be designed for co

specifically stated, all LV Switchgear

tested assemblies (TTA).

All main and dropper busbars shall be fully insulated.

All structural work shall be adequately protected against corrosion. Frame and partitions may be

of galvanised steel without the need for a further paint coating. Those parts/covers requiring

painting shall be properly pre

(are) applied.

Assemblies shall comprise one or more sections of busbars to which incoming and outgoing

units are connected. Busbar sections shall be linked through sectional

sectionalizer units shall fully withdraw

incoming feeder “Air Circuit Breaker”.

LV Switchgear incomer units shall be ACB and managed by an intelligent feeder protection

relay (FPR).

All motor starter modules shall comprise MCCB/contactor/motor control unit (MCU). Non

feeders rated up to 400A shall c/w MCCB, non

ACB/feeder control unit (FCU).

Each main incoming feeder shall be rated wit

The Switchgear shall be control by ICSS over dry contact and monitoring via serial link.

All ESD relays shall be hard wired between the LV

Fully equipped spare compartments shall be prov

compartments shall be 25% of each size of outgoing units subject to the minimum number

being 1 for each size.

Unless specifically stated otherwise, all LV induction motors sh

LV motors rated 100kW and above shall be assisted star

All motors shall be protected with intelligent MPR. The MPR shall have LCD panel as HMI either

as integrated into the MPR.

Motor earth fault protection to be provided for

Motors may be remotely controlled (for start/stop) from the PCS through the IMCS, and tripped

from ESD (in case of exercising emergency shut


FEED BOD FOR KNT

The low voltage assemblies shall be designed for continuous operation at full load.

Switchgear shall be indoor installed low voltage factory built type

nd dropper busbars shall be fully insulated.



roperly pre-treated before the final coat(s) of oil resistant finishing paint is


units are connected. Busbar sections shall be linked through sectional

sectionalizer units shall fully withdraw-able and be identical in construction/make to those of the

incoming feeder “Air Circuit Breaker”.

incomer units shall be ACB and managed by an intelligent feeder protection

All motor starter modules shall comprise MCCB/contactor/motor control unit (MCU). Non

feeders rated up to 400A shall c/w MCCB, non-motor feeder rated above 400A shall c/w

ACB/feeder control unit (FCU).

Each main incoming feeder shall be rated with 25% spare current carrying capacity.

shall be control by ICSS over dry contact and monitoring via serial link.

All ESD relays shall be hard wired between the LV Switchgear and the ESD system.

Fully equipped spare compartments shall be provided in each Switchgear. The number of spare


Unless specifically stated otherwise, all LV induction motors shall be started

motors rated 100kW and above shall be assisted started by electronic soft starters


Motor earth fault protection to be provided for all motors.


from ESD (in case of exercising emergency shut-down).

ntinuous operation at full load. Unless

shall be indoor installed low voltage factory built type-



treated before the final coat(s) of oil resistant finishing paint is


units are connected. Busbar sections shall be linked through sectionalizer units. These

able and be identical in construction/make to those of the

incomer units shall be ACB and managed by an intelligent feeder protection

All motor starter modules shall comprise MCCB/contactor/motor control unit (MCU). Non-motor

motor feeder rated above 400A shall c/w

h 25% spare current carrying capacity.

shall be control by ICSS over dry contact and monitoring via serial link.

and the ESD system.

. The number of spare


all be started-up by DOL method.

ted by electronic soft starters.





Page 33 of 53

All package equipment motors which have Unit Control Panels (UCP),

controlled by hard-wired start/stop command signals and status signals. Shutdown/trip

originating from ESD shall only be effected through one hardwired signal from the ESD to the

Unit Control Panel.

Push button type of local control sta

all electric motor [to be confirmed

30kW [to be confirmed]. Depending on the application (whether control by DCS or by package

UCP), LCS configuration for motor starters shall either be H

Electrical interlock shall be provided in the LV

switching of the incoming ACBs and bus

During emergency power generato

main power generator and emergency power generator supply. However,

(i.e., from normal power supply, EDG supply) of essential LV

the same time.

9.7 Low Voltage Distr ibut ion Board

The distribution boards shall be designed and constructed in accordance with the requirements

of the latest edition of IEC 60439

Distribution boards shall be used to supply power to load centres

etc.). The MCCB shall be used for the distribution board main incoming. Small power and

lighting circuits shall be controlled by miniature circuit breakers (MCBs) with thermal

trip to protect against overload and sho

outlets shall be provided with individual 30mA

The indoor DBs located inside

AC UPS distribution boards shall be provided

and telecommunication loads.

Provisions shall be made to enable the incoming MCCB to be switched without opening the

cover of distribution board enclosure.

Phase indicator lights, voltmeter & ammeter (with selector switch) sh

distribution board incomer.

9.8 Variable Frequency Drive (VFD)


FEED BOD FOR KNT

All package equipment motors which have Unit Control Panels (UCP),

wired start/stop command signals and status signals. Shutdown/trip


Push button type of local control station (LCS) with running indicating light shall be provided for

to be confirmed]. An ammeter shall be provided on LCS for motor rated

]. Depending on the application (whether control by DCS or by package

configuration for motor starters shall either be H-O-A type.

Electrical interlock shall be provided in the LV Switchgear/ MCC to control the automatic

switching of the incoming ACBs and bus-tie ACBs during transfer supply.

During emergency power generator weekly on load testing, it will be parallel supply between

main power generator and emergency power generator supply. However,

(i.e., from normal power supply, EDG supply) of essential LV Switchgear

Voltage Distr ibut ion Boards

shall be designed and constructed in accordance with the requirements

439, IEC 61439 and IEC 60529.

Distribution boards shall be used to supply power to load centres (small power & lighting, UPS,


lighting circuits shall be controlled by miniature circuit breakers (MCBs) with thermal

trip to protect against overload and short circuit. Outgoing feeders for convenience socket

shall be provided with individual 30mA earth leakage protection device.

The indoor DBs located inside E&I Room shall be rated IP42.

AC UPS distribution boards shall be provided for feeding instrument loads (P

and telecommunication loads.


cover of distribution board enclosure.

Phase indicator lights, voltmeter & ammeter (with selector switch) shall be provided for the

Variable Frequency Drive (VFD)

All package equipment motors which have Unit Control Panels (UCP), shall be remotely

wired start/stop command signals and status signals. Shutdown/trip


tion (LCS) with running indicating light shall be provided for

]. An ammeter shall be provided on LCS for motor rated ≥

]. Depending on the application (whether control by DCS or by package

/ MCC to control the automatic

r weekly on load testing, it will be parallel supply between

main power generator and emergency power generator supply. However, two incoming feeders

Switchgear cannot be closed at

shall be designed and constructed in accordance with the requirements

(small power & lighting, UPS,


lighting circuits shall be controlled by miniature circuit breakers (MCBs) with thermal-magnetic

Outgoing feeders for convenience socket

earth leakage protection device.

ent loads (PCS, FGS and SIS)


all be provided for the



Page 34 of 53

Variable frequency drives shall be employed where either speed

equipment is necessary or to regulate the high starting current encountered for except

large LV motors.

For applications in hazardous locations, the VFD and driven electric motor shall be matched and

the electric motor shall be designed, constructed and certified for hazardous area operation.

The combination of VFD and motor shall be specified to be supplied from same

Manufacturer/Supplier – in order that single

Depending on required motor rating and overall power system configuration, voltage levels for

VFD/electric motors may either be at LV or

Current harmonic distortion caused by the rectifier input current of VFDs shall be controlled and

mitigated in order that system voltage harmonic distortion is kept within 5% and 3%

harmonic distortion (THD) and any single harmonic respectively.

VFDs of motors driving process equipment shall have direct communication with PCS for

start/stop commands, speed raise/lower commands, common fault alarms, and stand

Either hard-wire signaling or

acceptable. However, tripping signal from ESD shall be hardwired to trip the upstream breaker

of the VFD.

VFD motor feeders shall be 3

constructed and rated for VFD applications; single core cables shall not be used for VFD

application.

9.9 Uninterrupt ible Power Supply (UPS)

9.9.1 AC UPS

AC UPS systems shall be provided for powering up vital loads.

The AC UPS system shall be designed and constructed in accordance with the Specification for

AC Uninterruptible Power Supply and Datasheet for AC Uninterruptible Power Supply which will

be prepared during FEED.

UPS system shall be provided to power vital

control supply, helideck lights, aviation obstruction lights, generator control panel, compressor

control panel, telecommunication systems, and instrument systems like ESD/FGS/PCS

workstation and other vital package control panels.


FEED BOD FOR KNT

Variable frequency drives shall be employed where either speed-control of motor driven

equipment is necessary or to regulate the high starting current encountered for except




in order that single-point responsibility is ensured.


ectric motors may either be at LV or MV.


mitigated in order that system voltage harmonic distortion is kept within 5% and 3%

THD) and any single harmonic respectively.


start/stop commands, speed raise/lower commands, common fault alarms, and stand

wire signaling or serial link data communication between PCS and VFD may be


VFD motor feeders shall be 3-core power cables with three symmetrical ground conductors

ed and rated for VFD applications; single core cables shall not be used for VFD

Uninterrupt ible Power Supply (UPS)

AC UPS systems shall be provided for powering up vital loads.



UPS system shall be provided to power vital electrical loads such as LV

lights, aviation obstruction lights, generator control panel, compressor


workstation and other vital package control panels.

control of motor driven

equipment is necessary or to regulate the high starting current encountered for exceptionally




point responsibility is ensured.



mitigated in order that system voltage harmonic distortion is kept within 5% and 3% - for total


start/stop commands, speed raise/lower commands, common fault alarms, and stand-by status.

link data communication between PCS and VFD may be


core power cables with three symmetrical ground conductors

ed and rated for VFD applications; single core cables shall not be used for VFD



electrical loads such as LV Switchgear/MCC

lights, aviation obstruction lights, generator control panel, compressor




Page 35 of 53

The selection of either 3 phase or 1 phase outpu

estimated during the course of equipment sizing.

The AC UPS installation shall consist of 2 x 100% UPS units (connected in Parallel Redundant

configuration each with its own charger, battery, static changeover, Inver

maintenance by-pass transformer, common maintenance bypass switch and a common AC

UPS distribution panel.

A static by-pass shall be provided to allow the automatic changeover of the output supply from

the inverter to a stabilised supply

A maintenance by-pass shall be provided via a changeover switch to allow manual changeover

of the output supply from inverter to isolation of the UPS for maintenance.

The AC UPS shall be suitable f

Input supply

Output voltage

(depending on installed

kVA)

The AC UPS unit shall be of free standing, sheet metal, front access with floor mounted panel

suitable for mounting by bolts. The enclosure degree of protection shall be

The UPS shall be installed inside the E&I room. Battery bank shall be

mounted inside the battery room.

Battery circuit breaker shall be provided inside the battery room to isolate the battery bank from

the battery charger and load bus. The breaker shall be installed in explosion proof enclosure.

The circuit breaker shall have tripping facility from FGS/ESD and manual/remote.

The battery circuit breaker shall be manually close only.

9.9.2 Batteries

The batteries (2 x50%) [to be confirmed]

a) VRLA (Valve Regulated

requiring minimal maintenance. Cells shall be equipped with pressure relief valves of

self-resealing type


FEED BOD FOR KNT

The selection of either 3 phase or 1 phase output AC UPS shall depend on installed kVA

estimated during the course of equipment sizing.


configuration each with its own charger, battery, static changeover, Inver

pass transformer, common maintenance bypass switch and a common AC

pass shall be provided to allow the automatic changeover of the output supply from

the inverter to a stabilised supply from a bypass-transformer when both of rectifiers fail.

pass shall be provided via a changeover switch to allow manual changeover


The AC UPS shall be suitable for operation with the following requirements:

: 400V, 50 Hz, 3-phase, 3-wire

(depending on installed

: Either 230V, 50 Hz, 3-phase, 3-wire, or 230V, 50 Hz,

1-phase, 2-wire


suitable for mounting by bolts. The enclosure degree of protection shall be

The UPS shall be installed inside the E&I room. Battery bank shall be installed on the steel rack

mounted inside the battery room.



he circuit breaker shall have tripping facility from FGS/ESD and manual/remote.

The battery circuit breaker shall be manually close only.

[to be confirmed] shall be considered by following options:

VRLA (Valve Regulated Lead Acid) sealed type which is of gas recombine type,


t AC UPS shall depend on installed kVA


configuration each with its own charger, battery, static changeover, Inverter) with a common

pass transformer, common maintenance bypass switch and a common AC

pass shall be provided to allow the automatic changeover of the output supply from

transformer when both of rectifiers fail.

pass shall be provided via a changeover switch to allow manual changeover


or operation with the following requirements:

wire, or 230V, 50 Hz,


suitable for mounting by bolts. The enclosure degree of protection shall be IP 42 minimum.

installed on the steel rack



he circuit breaker shall have tripping facility from FGS/ESD and manual/remote.

shall be considered by following options:

Lead Acid) sealed type which is of gas recombine type,




Page 36 of 53

b) Sealed maintenance free Nickel Cadmium (NI

The type of battery will be specified at the FEED stage.

Battery room temperature should be maintained at 20°C, in order to maintain optimum

performance and ensure full design life.

Batteries shall be sized with a 25% ageing factor and a further 10% con

Batteries mounted in indoor battery rooms shall be as per specified on the technical data

sheets.

The batteries of UPS units shall be rated to energise the relevant loads for not less than

confirmed]:

45 min. - For

other systems like Metering panels, etc

45 min. - For non

CCTV and etc.

1 hour - For

1 hour - For

1 hour - For helideck lighting i.e., flood lights/ perimeter lights

1 hour - For Fire and Gas System, FGS

12 hours - For Illuminated Windsock and Aviation Obstruction Light

24 hours - For

equipment

96 hours - For

9.10 Electr ic Motors

Electric motors shall be designed and constructed in accordance with the Specification for

Electrical LV Motor and the relevant Datasheet for Electrical LV Motor which

during FEED.


FEED BOD FOR KNT

Sealed maintenance free Nickel Cadmium (NI-Cd).

The type of battery will be specified at the FEED stage.


performance and ensure full design life.

Batteries shall be sized with a 25% ageing factor and a further 10% contingency shall be added.


The batteries of UPS units shall be rated to energise the relevant loads for not less than

ForSwitchgears, packaged equipment unit control panels, and all

other systems like Metering panels, etc.

or non-SOLAS (if required) communication equipment e.g. LAN,

CCTV and etc.

For shutdown system, ESD.

ForProcess Control System, PCS.

or helideck lighting i.e., flood lights/ perimeter lights

or Fire and Gas System, FGS

or Illuminated Windsock and Aviation Obstruction Light

For SOLAS (Safety of Life at Sea, if required

equipment

For Navigational Aids marine lanterns, and beacon


Electrical LV Motor and the relevant Datasheet for Electrical LV Motor which


tingency shall be added.


The batteries of UPS units shall be rated to energise the relevant loads for not less than[to be

s, packaged equipment unit control panels, and all

communication equipment e.g. LAN,

or helideck lighting i.e., flood lights/ perimeter lights

or Illuminated Windsock and Aviation Obstruction Light

, if required) communications

Navigational Aids marine lanterns, and beacon


Electrical LV Motor and the relevant Datasheet for Electrical LV Motor which will be prepared



Page 37 of 53

Electric motors shall generally be delivered as part of a mechanical equipment package, i.e.

mounted on the same skid or base plate as the driven equipment. For hazardous area

installation, motors shall be suitably certified.

All electric motors shall be of squirrel cage, totally enclosed fan cooled (TEFC) induction type,

continuously rated for duty type S1, and generally suitable for direct

enclosure and terminal box shall have IP56 as minimum ingress

submerged electrical motors IP68

Motor winding shall be made from copper and insulated to insulation class F with maximum

temperature rise allowable for class B. However, winding insulation class for submer

shall be as per Manufacturer’s standard.

Electrical motors, as a minimum, shall be provided with proper sealing of motor shaft and cable

entry.

VFD driven motors shall have additional nameplate stating that the motor being suitable for

hazardous location duty while being driven by a matching VFD, and whatever operating

conditions to be observed.

Motor anti-condensation heater shall be provided for all motors

anti-condensation heater shall be controlled from the

contact – to energise when motor is not running.

The location of the Local Control Station (LCS) and / or safety switch shall be on the opposite

side of the motor to the main terminal box. LCS enclosures located at open area exposed to

direct sun ray and rain shall be made from 316L stainless or

Glass Reinforced Fibre (GRP) can also be used as alternative material for LCS enclosures

installed in shaded areas.

9.11 Electr ical Heater

9.11.1 Crude oi l heater

Electric heater power shall be regulated by thyristors fired according to the zer

(with a controlled output power range down to 1 cycle) in conjunction with step

approved by Company, phase angle control shall not be utilised as a solution for power

regulation.


FEED BOD FOR KNT



installation, motors shall be suitably certified.


continuously rated for duty type S1, and generally suitable for direct-on

enclosure and terminal box shall have IP56 as minimum ingress of protection, but for

submerged electrical motors IP68 (if required) shall apply.


temperature rise allowable for class B. However, winding insulation class for submer

shall be as per Manufacturer’s standard.



us location duty while being driven by a matching VFD, and whatever operating

condensation heater shall be provided for all motors ≥ 15 kW [to be confirmed]

condensation heater shall be controlled from the motor starter main contactor auxiliary

to energise when motor is not running.



direct sun ray and rain shall be made from 316L stainless or aluminum


Electric heater power shall be regulated by thyristors fired according to the zer

(with a controlled output power range down to 1 cycle) in conjunction with step





on-line starting. Motor

of protection, but for


temperature rise allowable for class B. However, winding insulation class for submersible motor



us location duty while being driven by a matching VFD, and whatever operating

[to be confirmed]. Motor

motor starter main contactor auxiliary



alloy (LM6). Polyester


Electric heater power shall be regulated by thyristors fired according to the zero crossover mode

(with a controlled output power range down to 1 cycle) in conjunction with step-controller; unless




Page 38 of 53

Electric heaters with total load greater

loads. These discrete heater loads should be controlled by step

contactors, with one remaining as “thyristor controlled”.

Thyristor stack protection shall include over

voltage transient suppressors.

The heater elements shall be designed to withstand the highest possible temperature which can

occur under all process conditions.

Tubular heater elements shall be constructed fr

surrounded by compacted magnesium oxide powder, designed to minimise peak in rush

current. The element shall include an overall sheath tube made from material providing

corrosion/ erosion resistance suitable fo

20% spare (of the total number of elements required to fulfil the operational duties of the unit)

installed heater elements, but not connected, shall be provided. All spare elements shall be

fitted with wires of sufficient length to conne

use. The number of heating elements provided in the heater bundle shall be indicated.

Heater elements shall be protected against over

thermocouples. The devices shal

phases) and located in an area of highest anticipated sheath temperature.

Electrical Heater shall be provided with thermocouple control to cut

high skin temperature.

Temperature sensing wiring shall be brought out to separate terminal box of IP 66 rating.

Terminal boxes material shall be stainless steel SS 316L.

Thermocouple material shall be chromel

thermocouple sheath shall be of the same material as the heating element sheath with a

minimum wire size of 0.75mm2. Thermocouple wires extending from the sheath shall be

hermetically sealed in the head.

The heater control panel and associated heater shall be designed to provide

operation at rated output to suit process gas temperature conditions as per stipulated process

requirements.

The heater control panel shall be located indoor and be designed to withstand the

environmental conditions as specified in this document


FEED BOD FOR KNT

Electric heaters with total load greater than 45kW shall be split into smaller discrete heater

loads. These discrete heater loads should be controlled by step-controller acting on power

contactors, with one remaining as “thyristor controlled”.

Thyristor stack protection shall include over-current protection by means of ultra

voltage transient suppressors.


occur under all process conditions.

Tubular heater elements shall be constructed from 80/20 NiCr (Nickel Chrome) resistance wire



corrosion/ erosion resistance suitable for the operation.



fitted with wires of sufficient length to connect the element to any bus-bar in the event of their


Heater elements shall be protected against over-temperature by means of at least

thermocouples. The devices shall be clamped or welded to the sheaths of elements (different


Electrical Heater shall be provided with thermocouple control to cut-off the heater in case of

emperature sensing wiring shall be brought out to separate terminal box of IP 66 rating.

Terminal boxes material shall be stainless steel SS 316L.

Thermocouple material shall be chromel-alumel with swaged sheath mineral oxides. The

l be of the same material as the heating element sheath with a


hermetically sealed in the head.

The heater control panel and associated heater shall be designed to provide



environmental conditions as specified in this document.

than 45kW shall be split into smaller discrete heater

controller acting on power

protection by means of ultra-rapid fuses and


om 80/20 NiCr (Nickel Chrome) resistance wire





bar in the event of their


temperature by means of at least three

l be clamped or welded to the sheaths of elements (different


off the heater in case of

emperature sensing wiring shall be brought out to separate terminal box of IP 66 rating.

alumel with swaged sheath mineral oxides. The

l be of the same material as the heating element sheath with a


The heater control panel and associated heater shall be designed to provide continuous





Page 39 of 53

The design of the Heater Control Panel shall be provided with the facilities for remote and

monitoring operation with PCS

9.11.2 Heat Tracing

Heat tracing shall be provided in accordance with requirement identified on the Process and

Instrumentation Diagrams (P & ID). The power supplies from Low Voltage

power cable shall be connected to power terminal kits or power junction boxes near relevant

process piping from the self-

termination kits shall be accessible locations. The leakage protection for heat tracing system

shall be provided with earth leakage circuit breaker (ELCB). All components of heat tracing

system shall be in compliance with hazardous area classification.

9.12 Integrated Motor Control Centre (IMCS)

The Integrated Motor Control Centre (IMCS) shall be a system complete with microprocessor

based intelligent motor/feeder protection relays, control and monitoring system for both

[HOLD] and LV Switchgears, and other electrical systems (e.g. UPS).

The IMCS shall be part of the 400V

manufacturers must be approved by the Company.

Each motor circuit and outgoing feeder shall be controlled by the microprocessor

Control Unit (MCU) and Feeder Control Unit (FCU). The microprocessor based interface device,

Central Control Unit (CCU) shall have a

MCUs and FCUs. This connection shall be of the “daisy chain”

the communication link is broken at a single point, all devices are still accessible from the CCU.

If necessary, IMCS shall be capable of interfacing with intelligent

via a separately configured Ethernet link network

PCS communication with the Integrated Motor Control System (IMCS) shall be via redundant

serial link with MODBUS protocol.

Remote start/stop of motors from

PCS shall also receive status and alarm signals for each motor.

The motor standby/run status and alarm shall be displayed at

Station (OWS).


FEED BOD FOR KNT


CS.


(P & ID). The power supplies from Low Voltage


-regulating heating cable will be connected. Heat tracing power

n kits shall be accessible locations. The leakage protection for heat tracing system


system shall be in compliance with hazardous area classification.

tor Control Centre (IMCS)


based intelligent motor/feeder protection relays, control and monitoring system for both

s, and other electrical systems (e.g. UPS).

The IMCS shall be part of the 400V Switchgear/ MCC package order and both equipment

manufacturers must be approved by the Company.

Each motor circuit and outgoing feeder shall be controlled by the microprocessor


Central Control Unit (CCU) shall have an Ethernet link connection for communication with

MCUs and FCUs. This connection shall be of the “daisy chain” type thus ensuring that even if


If necessary, IMCS shall be capable of interfacing with intelligent Feeder Protection Relay (

d Ethernet link network – so as to link the FPR to the IMCS CCU.

CS communication with the Integrated Motor Control System (IMCS) shall be via redundant

serial link with MODBUS protocol.

Remote start/stop of motors from PCS shall be provided as required.

CS shall also receive status and alarm signals for each motor.

The motor standby/run status and alarm shall be displayed at PCS and at IMCS Operator Work



(P & ID). The power supplies from Low Voltage Switchgear, the


regulating heating cable will be connected. Heat tracing power

n kits shall be accessible locations. The leakage protection for heat tracing system



based intelligent motor/feeder protection relays, control and monitoring system for both MV

/ MCC package order and both equipment

Each motor circuit and outgoing feeder shall be controlled by the microprocessor based Motor


Ethernet link connection for communication with

type thus ensuring that even if


Feeder Protection Relay (FPR)

so as to link the FPR to the IMCS CCU.

CS communication with the Integrated Motor Control System (IMCS) shall be via redundant

CS and at IMCS Operator Work



Page 40 of 53

Motor trip command from the ESD shall be hardwired to the 400V

The trip relays required for the ESD signals shall be available in the 400V

When the trip command is active, motor shall not be possible to start either from

the LCS in the field.

Electrical main circuit breakers’ open/cl

IMCS.

Other miscellaneous electrical system I/Os which are not available from IMCS, such as battery

and charger alarms, UPS common alarms, etc. shall be hardwired to the

9.13 Bus duct

Bus ducts shall be used in place of high “ampacity” feeders requiring multiple runs of single or

multi-core cables e.g. feeders between transformers and LV

The bus ducts shall be designed as a system consisting of straight lengths, bends, elbows,

break-outs, and terminal (flexible connectors).

The connection bus ducts shall be designed and constructed to IEC 61439

ingress protection of IP 55 for indoor bus duct.

Bus ducts shall comprise of annealed hard drawn copper busbars self

homogenous insulation, rigidly supported in a totally enclosed and non

enclosure. The bus ducts shall be flame retardant and shall consist of 3 phase and neutral

busbars complete with internal earth bus. Busbars shall be insulated over t

The temperature rise of busbars inside the bus ducts shall not exceed the permissible values

stipulated in IEC 61439, while carrying the rated full load current. Neutral bus shall have

continuous current ratings of 100 % of the phase b

Busbars shall be sized, braced and supported to withstand the mechanical and thermal stresses

of the rated short circuit current of the Transformers,

terminated. Bus ducts shall have short time ratings not less th

Bus duct access openings shall be provided at each end of bus ducts for testing and

commissioning purposes.

The busduct system design shall carry type test certification from a recognized independent

testing laboratory for short-circuit withstand capability.

9.14 Electr ic Power and Control Cables


FEED BOD FOR KNT

Motor trip command from the ESD shall be hardwired to the 400V Switchgear

The trip relays required for the ESD signals shall be available in the 400V

When the trip command is active, motor shall not be possible to start either from

Electrical main circuit breakers’ open/close status shall be relayed to the


and charger alarms, UPS common alarms, etc. shall be hardwired to the P

used in place of high “ampacity” feeders requiring multiple runs of single or

core cables e.g. feeders between transformers and LV Switchgear.


terminal (flexible connectors).

The connection bus ducts shall be designed and constructed to IEC 61439

ingress protection of IP 55 for indoor bus duct.

Bus ducts shall comprise of annealed hard drawn copper busbars self

homogenous insulation, rigidly supported in a totally enclosed and non


busbars complete with internal earth bus. Busbars shall be insulated over t



continuous current ratings of 100 % of the phase bus.


of the rated short circuit current of the Transformers, Switchgear to which the bus ducts are

terminated. Bus ducts shall have short time ratings not less than the upstream circuit breakers.



circuit withstand capability.

Electr ic Power and Control Cables

Switchgear/ MCC directly.

The trip relays required for the ESD signals shall be available in the 400V Switchgear/ MCC.

When the trip command is active, motor shall not be possible to start either from PCS or from

ose status shall be relayed to the PCS through the


PCS.

used in place of high “ampacity” feeders requiring multiple runs of single or


The connection bus ducts shall be designed and constructed to IEC 61439-2 with degree of

Bus ducts shall comprise of annealed hard drawn copper busbars self-extinguishing with

homogenous insulation, rigidly supported in a totally enclosed and non-ventilated metal


busbars complete with internal earth bus. Busbars shall be insulated over their entire lengths.




to which the bus ducts are

an the upstream circuit breakers.





Page 41 of 53

Electric cables to be installed shall be designed and constructed in accordance with the

Specification for Electrical Cables which will be prepared during FEED.

Cables shall be stranded (Class 2), tinned annealed copper conductor according to IEC 60228.

Where more flexible cable bending is required, and upon the approval from the Company, Class

5 cables shall be employed where needed.

For LV distribution system, maximum copper conduct

mm2 and 185 mm2 for power feeders and motor feeders respectively.

For MV distribution system, maximum copper conductor size for multi

mm2.

Minimum cable cross-section for power and ligh

1.5mm2 respectively.

Cables for normal services shall be flame retardant to IEC 60332

services shall be flame retardant and fire resistant to IEC 60331.

9.15 Lighting System

The lighting system shall consist of normal lighting fed by normal lighting distribution boards

while emergency lighting will be powered by emergency lighting distribution boards.

floodlights and well-glass lights will be used for general lighting. The

floodlight shall be made for open areas; glare control shall be exercised. Floodlights and well

glass lights with either Ex’d’ or Ex’de’ certification and IP66. The lamp wattage will depend on

the area to be lit.

Fluorescent luminaries will be used, where necessary, for local lighting of operating areas

requiring higher illumination level which will be difficult to achieve using floodlights.

Fluorescent luminaires shall be used for escape route lightings. For escape lighting, the same

type of luminaires shall each be equipped with an internal self

battery/charger.

The location and mounting of luminaries shall take account of efficient illumination, accessibility

of luminaries and convenience of servicing. Luminaries sh

having exposed moving parts. Adjacent luminaires shall, as far as practicable, be on separate

circuits. Lighting circuits shall also be arranged to avoid stroboscopic effects.


FEED BOD FOR KNT


Specification for Electrical Cables which will be prepared during FEED.

ed (Class 2), tinned annealed copper conductor according to IEC 60228.


5 cables shall be employed where needed.

For LV distribution system, maximum copper conductor sizes for multi-core cables shall be 240

mm2 and 185 mm2 for power feeders and motor feeders respectively.

V distribution system, maximum copper conductor size for multi-core cables shall be 185

section for power and lighting/control cables shall be 2.5mm2 and

Cables for normal services shall be flame retardant to IEC 60332-3 Cat A while those for critical

services shall be flame retardant and fire resistant to IEC 60331.


while emergency lighting will be powered by emergency lighting distribution boards.

glass lights will be used for general lighting. The maximum usage of the

floodlight shall be made for open areas; glare control shall be exercised. Floodlights and well

or Ex’de’ certification and IP66. The lamp wattage will depend on

s will be used, where necessary, for local lighting of operating areas



type of luminaires shall each be equipped with an internal self


of luminaries and convenience of servicing. Luminaries shall not be mounted above machinery




ed (Class 2), tinned annealed copper conductor according to IEC 60228.


core cables shall be 240

core cables shall be 185

ting/control cables shall be 2.5mm2 and

3 Cat A while those for critical


while emergency lighting will be powered by emergency lighting distribution boards. HPS

maximum usage of the

floodlight shall be made for open areas; glare control shall be exercised. Floodlights and well-

or Ex’de’ certification and IP66. The lamp wattage will depend on

s will be used, where necessary, for local lighting of operating areas



type of luminaires shall each be equipped with an internal self-contained backup


all not be mounted above machinery





Page 42 of 53

Lighting circuits shall be single phase and n

maximum 16A MCBs, but not be loaded higher than 12A. Lighting distribution boards shall

include minimum 10% spare outgoing circuits.

A lighting circuit shall have a maximum load of 1800W or a maximum of 24

The required illumination levels measured at the working plan or 0.8m from floor level in a

horizontal, are shown in the table 2, table 3 & table 4

The illumination levels shall base on the following tables below.

Table 2 (Normal lightin

Outdoor

Walkways, Stairways, Exterior

Entrance Door Stops

Open Deck Areas

Wellhead Areas

Compressor, Pump and Generator bays, General

Panel Fronts

Outdoor Process Area

Outdoor Non Process Area

Indoor

Offices, General

Offices, Desk Area ( Achieved with supplementary

lighting from table-lamps)

Recreations room


FEED BOD FOR KNT

Lighting circuits shall be single phase and neutral (1 phase + neutral + earth), protected with


include minimum 10% spare outgoing circuits.

A lighting circuit shall have a maximum load of 1800W or a maximum of 24


horizontal, are shown in the table 2, table 3 & table 4

The illumination levels shall base on the following tables below.

Table 2 (Normal lighting):

LOCATION Emin (lux)

Walkways, Stairways, Exterior

Compressor, Pump and Generator bays, General

Outdoor Process Area

Outdoor Non Process Area

Offices, Desk Area ( Achieved with supplementary

lamps)

eutral (1 phase + neutral + earth), protected with


A lighting circuit shall have a maximum load of 1800W or a maximum of 24 fixtures/circuit.


Emin (lux)

50

50

50

50

300

100

150

75

500

700

300



Page 43 of 53

Bedrooms, General

Hallways, Stairways, Interior

Bath, General

Bath, Mirror

Mess hall

Galley, General

Galley, Sink & Counter Areas

Electrical control rooms

Central Control Room (lighting controlled by electronic

dimmers)

E&I Room ( Transformer, Battery, E&I Room)

Instrument Equipment Room

Store rooms, Utility Closets

Walk-in Freezers, Refrigerators

TV Rooms (Lights equipped with dimmers)

Workshops, General

Workshops (Difficult Seeing Task Area)


FEED BOD FOR KNT

Hallways, Stairways, Interior

Galley, Sink & Counter Areas

Electrical control rooms

Central Control Room (lighting controlled by electronic Up to 400

Room ( Transformer, Battery, E&I Room)

Instrument Equipment Room

Closets

in Freezers, Refrigerators

TV Rooms (Lights equipped with dimmers) Up to 300

Workshops (Difficult Seeing Task Area)

200

100

100

500

300

500

1000

300

Up to 400

300

400

50

50

Up to 300

700

1000



Page 44 of 53

Table 3 (Emergency lighting): When powered by Essential Distribution board

Outdoor

Stairways

Escape route

Process area

General process

Wellhead Area

Indoor

Instrument equipment room

E&I Room

Workshop

Battery room

Shelter

Transformer Room

Table 4 (Escape route lighting):

back-up battery)

Outdoor

Stairways

Escape route


FEED BOD FOR KNT


LOCATION Emin (lux)


Table 4 (Escape route lighting): Emergency mode (When powered by internal

LOCATION Emin (lux)


Emin (lux)

20

20

45

23

-

50

50

100

50

50

50

Emergency mode (When powered by internal

Emin (lux)

5

1



Page 45 of 53

Indoor


Center Control room

Workshop

Battery room

E&I room

Transformer Room

9.16 Navigational Aids

The navigation aids system shall be supplied from a dedicated DC UPS and control system

complete with 96-hour back-up battery bank.

9.16.1 Marine Navigational Lights

All equipment and all it accessories shall be suitable for areas classification (normally Z

Navigational Aids System shall be provided to comply with the statutory requirements. Main

white navigation lights with 10 nautical miles visibility

requirements of the International Association of Lighthous

Marine lanterns shall be provided at the corners of the platform. Flashing white light exhibiting

Morse code 'U' signal every 15 seconds shall be provided to mark the furthest corners of the

platform such that at the horizontal extrem

vessel.

The marine navigational aids system shall operate from the Navigational A

Panel (NCCP) with synchronizing facilities.

A dedicated 24V DC UPS system for the navigational aids

following main components shall form part of the package:

1 x 100% Rectifier (charger)

1 x 100% Battery bank


FEED BOD FOR KNT



up battery bank.

Mar ine Navigational Lights

All equipment and all it accessories shall be suitable for areas classification (normally Z


with 10 nautical miles visibility shall be provided in accordance with the

requirements of the International Association of Lighthouse Authorities (IALA).



platform such that at the horizontal extremities of the platform is visible to the approaching

The marine navigational aids system shall operate from the Navigational A

Panel (NCCP) with synchronizing facilities.

A dedicated 24V DC UPS system for the navigational aids system, comprising at least the

following main components shall form part of the package:

1 x 100% Rectifier (charger)

1 x 100% Battery bank

5

5

5

5

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All equipment and all it accessories shall be suitable for areas classification (normally Zone 1).


shall be provided in accordance with the

e Authorities (IALA).



ities of the platform is visible to the approaching

The marine navigational aids system shall operate from the Navigational Aid Central Control

system, comprising at least the



Page 46 of 53

The Ex”de” NCCP shall be located in E&I room with a minimum ingress protection of IP41

(min.); battery bank shall be housed in Ex’e’ battery box.

The 24V DC UPS system for navigational aids shall never be tripped even under gas

conditions.

Battery backup time shall be at least 96 hours or 4 days continuous.

9.16.2 Foghorns

Foghorns shall be provided for deployment during per

Installed locations of the foghorns shall enable the blasts to be in unison, heard from all

approach directions to the KNT platform.

Activation of the foghorns shall be automatic on detection of poor visibility at KNT platform.

9.16.3 Aviat ion Obstruct ion l ights

Red coloured aviation obstruction lights shall be installed on the pedestal crane, near/below the

flight path, which are considered as potential obstructions to aviation. The lighting luminaires

shall be Omni-directional with a

platform central AC UPS system with battery backup time of 12 hours.

9.16.4 Helideck Lightings

Helideck lighting shall be provided in accordance with International Civil Aviation Organisation

(ICAO) or CAP 437. Helideck shall be lighted up with green lanterns along the perimeter of the

landing area, together with helideck floodlights.

Helideck lighting shall be designed such that glaring to the pilot and hazard to helicopter landing

is avoided. Power supply to

Battery backup time shall be 1 hour.

Status lights (wave-off) and illuminated windsock shall be installed at the helideck.

9.17 Welding Socket Outlets

Welding socket outlets installed outdoors shall be suitable for Zone 1 areas, gas group IIA,

temperature class T3 as minimum, fitted with padlocking facilities and the distribution circuit

breakers associated with these socket outlets should be trip interlocked with the fi

gas/shutdown system.

In non-hazardous indoor areas, convenience socket outlets of the industrial type shall be

installed where required.


FEED BOD FOR KNT

NCCP shall be located in E&I room with a minimum ingress protection of IP41

e housed in Ex’e’ battery box.


Battery backup time shall be at least 96 hours or 4 days continuous.

Foghorns shall be provided for deployment during periods of poor visibility.


approach directions to the KNT platform.


Aviat ion Obstruct ion l ights



directional with a minimum intensity of 10 candelas and powered from the

platform central AC UPS system with battery backup time of 12 hours.

Helideck Lightings


. Helideck shall be lighted up with green lanterns along the perimeter of the

landing area, together with helideck floodlights.


the helideck lighting shall be from the AC UPS power supply.

Battery backup time shall be 1 hour.

off) and illuminated windsock shall be installed at the helideck.

Socket Outlets and convenience socket outlets

installed outdoors shall be suitable for Zone 1 areas, gas group IIA,


breakers associated with these socket outlets should be trip interlocked with the fi

hazardous indoor areas, convenience socket outlets of the industrial type shall be

NCCP shall be located in E&I room with a minimum ingress protection of IP41


iods of poor visibility.





minimum intensity of 10 candelas and powered from the


. Helideck shall be lighted up with green lanterns along the perimeter of the


the helideck lighting shall be from the AC UPS power supply.

off) and illuminated windsock shall be installed at the helideck.

installed outdoors shall be suitable for Zone 1 areas, gas group IIA,


breakers associated with these socket outlets should be trip interlocked with the fire and

hazardous indoor areas, convenience socket outlets of the industrial type shall be



Page 47 of 53

Welding socket outlets shall be mounted approximately 1.5m above grade level, on a free

standing support, on structural steelwork or on a building wall.

Convenience socket outlets shall be mounted approximately 0.3 to 1.5m above grade level, on

a building wall.

Outgoing circuit breaker for Welding socket outlets

with earth leakage protection (current operated ELCB or RCCB) with the following sensitivity:3

phase – 100mA and 1 phase –

Welding socket outlets shall be fed from 400V

shall be fed from distribution boards.

9.18 Junction Boxes

Power and lighting junction boxes for outdoor application, shall be made from electro

316L stainless steel, IP 66 and certified to Ex ’e’.

Indoor junction boxes may be made of high impact resistant, flame retardant glass

black polyester with internal ground continuity plate.

All outdoor power junction boxes cable entry shall be from bottom except for lighting junction

boxes where side and/ or bottom entries are acceptable.

9.19 Cable Ladder/ Tray

Cable support system shall gen

installed rigid cable supports shall be made of

Installed cables shall be fastened by means of Nylon sheathed stainless ste

every 1.5m for horizontal ladders/trays and 1m for vertical ladders/trays. Supports for cable

ladders or trays shall be painted carbon steel.

Separate cable ladder / tray shall be provided for

ladder shall be mounted as far as possible from i

10. PROTECTION, METERING

All distribution control, protection and monitoring functions shall be located on the respective

distribution panels and starters. Remote operation of power users (e.g. start/stop commands,

run/stop status and trip alarm for motor starters) shall be throug

Variable frequency drives (VFD) shall have their “running” and “stopped” status and “tripped”

alarm indicated on a built-in annunciator (LCD) panel.

Start/stop and ramp-up/ramp-


FEED BOD FOR KNT

shall be mounted approximately 1.5m above grade level, on a free

uctural steelwork or on a building wall.


Welding socket outlets and small power circuits shall be equipped

leakage protection (current operated ELCB or RCCB) with the following sensitivity:3

– 30mA.

Welding socket outlets shall be fed from 400V Switchgear/MCC and convenience socket outlets

shall be fed from distribution boards.

Power and lighting junction boxes for outdoor application, shall be made from electro

316L stainless steel, IP 66 and certified to Ex ’e’.

Indoor junction boxes may be made of high impact resistant, flame retardant glass

black polyester with internal ground continuity plate.


boxes where side and/ or bottom entries are acceptable.

Cable support system shall generally comprise cable racks, cable trays, cable ladders. All

installed rigid cable supports shall be made of firbe class (GRP/FRP).

Installed cables shall be fastened by means of Nylon sheathed stainless ste

adders/trays and 1m for vertical ladders/trays. Supports for cable

ladders or trays shall be painted carbon steel.

Separate cable ladder / tray shall be provided for MV, LV and DC cables. High voltage cable

ladder shall be mounted as far as possible from instrumentation cable ladder system.

PROTECTION, METERING, CONTROL AND SUPPERVISION



run/stop status and trip alarm for motor starters) shall be through the PCS.


in annunciator (LCD) panel.

-down commands to VSD shall be hardwired from the

shall be mounted approximately 1.5m above grade level, on a free-


and small power circuits shall be equipped

leakage protection (current operated ELCB or RCCB) with the following sensitivity:3

/MCC and convenience socket outlets

Power and lighting junction boxes for outdoor application, shall be made from electro-polished

Indoor junction boxes may be made of high impact resistant, flame retardant glass-reinforced


erally comprise cable racks, cable trays, cable ladders. All

Installed cables shall be fastened by means of Nylon sheathed stainless steel cable tie wraps in

adders/trays and 1m for vertical ladders/trays. Supports for cable

V, LV and DC cables. High voltage cable

nstrumentation cable ladder system.

VISION



.


down commands to VSD shall be hardwired from the PCS.



Page 48 of 53

If required, VFD shall also have the capability to relay status & alarm, load current, speed and

other critical information to the

The electrical system shall be equipped with automatic protection which shall provide

safeguards in the event of electrical equipmen

The selection and specification of switching and protective devices, control circuits and

associated auxiliary equipment shall be in accordance with international standards.

Notwithstanding these requirements, automatic

selective isolation of faulted equipment with minimum delay. In any event this shall be within a

time corresponding to the short circuit current withstand capability of equipment, system stability

limits and the maximum fault clearance times.

All incomers, transformer, and main ACB/VCB outgoing feeders are controlled and protected by

intelligent Feeder Protection Relays (FPR).

All electrical parameter such as volt, ampe, watt, frequency (Hz)…shall be read on t

system.

Unless otherwise specified, all protection devices related to generator/driver protection will be

provided by generator packager which form part of each generator UCP.

10.1 Generator Feeders

The generators incoming feeders shall have the

minimum. The protection and metering device shall be multifunction electronic type.

Differential relay (87)

Reverse power relay (32)

Synchronising check relay (25)

Voltage restrained overcurrent relay

Phase balance current relay (46)

Overvoltage relay / Undervoltage relay (59/27)

Over/under frequency (81 O/U)

Lockout relay (86)

Overcurrent relay (50/51)

Over temperature protection (49)

Earth fault protection (50N/51N)

Negative phase sequence relay (47)


FEED BOD FOR KNT

VFD shall also have the capability to relay status & alarm, load current, speed and

other critical information to the PCS.


safeguards in the event of electrical equipment failures or system mal-operation.



Notwithstanding these requirements, automatic protective systems shall be designed to achieve



the maximum fault clearance times.


intelligent Feeder Protection Relays (FPR).

All electrical parameter such as volt, ampe, watt, frequency (Hz)…shall be read on t


provided by generator packager which form part of each generator UCP.

Generator Feeders

The generators incoming feeders shall have the following protective and metering devices as a


Reverse power relay (32)


Voltage restrained overcurrent relay

balance current relay (46)

Overvoltage relay / Undervoltage relay (59/27)

Over/under frequency (81 O/U)


Over temperature protection (49)

Earth fault protection (50N/51N)

Negative phase sequence relay (47)

VFD shall also have the capability to relay status & alarm, load current, speed and


operation.



protective systems shall be designed to achieve




All electrical parameter such as volt, ampe, watt, frequency (Hz)…shall be read on the PCS


following protective and metering devices as a




Page 49 of 53

Trip coil supervision relay (TCM)

Metering devices includes ammeter with selector switch, voltmeter with selector switch, kWh

meter, wattmeter, frequency meter and power factor meter.

Surge arrester/suppressor, diode failure, loss of excitation, and over excita

for generator protection.

10.2 Switchgear/ MCC Incomer Feeders

The switchgear/ MCC incomer shall have the following protective and metering devices as a

minimum.The protection and metering device shall be multifunction electronic type

microprocessor based:

Thermal overload protection (49)


Earth fault (50N/51N)

Undervoltage relay (27)

Lockout relay (86)



Ammeter and voltmeter with selector switch

The switchgear bus-tie shall have synchronizing check relay (25).

10.3 Motor

MCCB for protection against short circuit shall be provided in addition to either motor protection

relay or thermal overload relay

All motor starters units shall each be equipped with a

which is capable of providing a range of motor

functions, control functions through input/output contacts, non

storing data of up to 10 trip events)

LV motors which are controlled by variable speed drives (VFD) shall be appropriately be

provided with PTC thermistor or RTD winding temperature detection.


FEED BOD FOR KNT

coil supervision relay (TCM)


meter, wattmeter, frequency meter and power factor meter.

Surge arrester/suppressor, diode failure, loss of excitation, and over excita

Switchgear/ MCC Incomer Feeders



Thermal overload protection (49)


Undervoltage relay (27)



Ammeter and voltmeter with selector switch

tie shall have synchronizing check relay (25).


relay or thermal overload relay.

units shall each be equipped with an intelligent motor protection relay (MPR)

which is capable of providing a range of motor-protection functions, monitoring and metering

functions, control functions through input/output contacts, non-volatile memory (capable of

events).


provided with PTC thermistor or RTD winding temperature detection.


Surge arrester/suppressor, diode failure, loss of excitation, and over excitation shall be provided




intelligent motor protection relay (MPR)

protection functions, monitoring and metering

volatile memory (capable of




Page 50 of 53

10.4 Transformer Feeder

Transformers are protected primarily against faults and overloads. The

should minimize the time of disconnection for faults within the transformer and to reduce the risk

of catastrophic failure to simplify eventual repair.

Any extended operation of the transformer under abnormal condition such as fau

compromises the life of the transformer, which means adequate protection should be provided

for quicker isolation of the transformer under such conditions

Vacuum circuit breaker (VCB) unit with multifunction electronic type of protection

provided.

Distribution transformers shall be connected in accordance with IEC standards, and shall be

controlled and protected on the primary side by the following:

VCB in conjunction with phase short circuit and earth fault protective relay

Earth fault protection shall be provided on the (earthed) star connected windings of distribution

transformers. This shall be achieved by means of a relay that shall be energised by a current

transformer (CT) placed in the neutral

winding. The primary current rating of the CT supplying this relay shall correspond to the

nominal current of the transformer secondary

with downstream protection device.

10.5 Feeders

Non-motor feeder MCCB rated at

thermal-magnetic type release.

Non-motor feeder MCCB rated above

Relay (FPR) and shunt-trip release.

10.6 Lighting and Small Power

Distribution board main incomer shall be provided with thermal

against overload and short circuit.

All lighting and small power outgoing circuits shall be protected by miniature circuit breaker

(MCB) against overload and short circuit.

Each outgoing circuits for socket outlets/ receptacles shall be provided with earth leakge circuit

breakers.


FEED BOD FOR KNT

Transformer Feeder

Transformers are protected primarily against faults and overloads. The type of protection used


of catastrophic failure to simplify eventual repair.

Any extended operation of the transformer under abnormal condition such as fau


for quicker isolation of the transformer under such conditions.

Vacuum circuit breaker (VCB) unit with multifunction electronic type of protection


controlled and protected on the primary side by the following:

VCB in conjunction with phase short circuit and earth fault protective relays shall be provided.



transformer (CT) placed in the neutral-earth connection of the power transformer secondary


nominal current of the transformer secondary the characteristic of this relay shall be coordinate

with downstream protection device.

motor feeder MCCB rated at 630A and below may be equipped with built

magnetic type release.

motor feeder MCCB rated above 630A and ACB shall be equipped with Feeder Protection

trip release.

Lighting and Small Power

Distribution board main incomer shall be provided with thermal-magnetic MCCB for protection

against overload and short circuit.

all power outgoing circuits shall be protected by miniature circuit breaker

(MCB) against overload and short circuit.


type of protection used


Any extended operation of the transformer under abnormal condition such as faults or overloads


Vacuum circuit breaker (VCB) unit with multifunction electronic type of protection relay shall be


s shall be provided.



th connection of the power transformer secondary


characteristic of this relay shall be coordinate

0A and below may be equipped with built-in electronic type

nd ACB shall be equipped with Feeder Protection

magnetic MCCB for protection

all power outgoing circuits shall be protected by miniature circuit breaker




Page 51 of 53

11. EARTHING

11.1 System Earthing

System earthing arrangement for individual systems shall be as follows:

System Voltage

6.6kV

400V

Instrument I.S.

Instrument Non IS

The LV power generation and distribution neutral for KNT,

designated as ‘TN-S’.

Generator neutral resistor and transformer star point are connected directly to main platform

steel structure beam via dedicated connections. Electrical earthing grid, instrument IS earth and

instrument non IS earth are connected directly to main platform

point per earthing system. All other earthing points shall be connected to main platform steel

structure beam.

11.2 Equipment Earthing

All exposed metal of electrical items, equipment and installation other than current carrying

parts will be double bonded and earthed, that is earthed via a separate earthing conductor

connected from the equipment frame externally to the earthing grid.

All non-electrical metallic equipment and installation not welded to structural steel framework

including skid mounted packages, vessel, steel structures etc. will be provided with (two

diagonally opposite where possible) earthing bosses bolted to the equipment skid. Earthing

conductors will then be connected to the equipment earthing from main struct

Earthing conductors are required to bond the main components of the generation and

distribution systems (namely

UPS units) to the platform steelwork/ main structure beam.


FEED BOD FOR KNT

System earthing arrangement for individual systems shall be as follows:

Earthing

Low resistance earthed at MV main power generator

neutral star point

Solidly earthed at distribution transformer secondary

star point and LV emergency power generator neutral

star point.

Instrument I.S. earthing system

Instrument clean earthing system

The LV power generation and distribution neutral for KNT, being “solidly ground” shall be



instrument non IS earth are connected directly to main platform steel structure, minimum at two




connected from the equipment frame externally to the earthing grid.

electrical metallic equipment and installation not welded to structural steel framework

ncluding skid mounted packages, vessel, steel structures etc. will be provided with (two


conductors will then be connected to the equipment earthing from main struct


distribution systems (namely MV and LV generators, transformers, Switchgear

UPS units) to the platform steelwork/ main structure beam.

V main power generator

Solidly earthed at distribution transformer secondary

ncy power generator neutral

solidly ground” shall be



steel structure, minimum at two




electrical metallic equipment and installation not welded to structural steel framework

ncluding skid mounted packages, vessel, steel structures etc. will be provided with (two


conductors will then be connected to the equipment earthing from main structure beam.


Switchgears, motors and



Page 52 of 53

Proper earthing to the transformer must be provided when welding of equipment to foundation,

base plates and piping. Earthing cables shall never be connected to any part of rotating

equipment including base plates, pedestal, drive, etc.

All cable racks / ladders / trays

structures and in no event the intervals shall exceed 25m.

On cabinets or panels with hinged doors, earthing

flexible earth bonding straps between the fixed and moving parts of the cabinet/panel.

The cross-sectional area of branch conductors connecting equipment and structures to the main

earth ring shall be as follows:

To metallic enclosure of M

To metallic enclosures of LV electrical equipment, having a

supply cable cross-sectional area > 35 mm²


supply cable cross-sectio

To control panels. Etc.

To non-electrical equipment exposed to lightning, e.g. tanks,

columns and tall structures

To other non-electrical equipment

11.3 Lightning Protect ion

Offshore platform topside shall be of fully structural steel construction welded to the jacket and

the jacket bonded to the ground. Hence conventional lightning protection system for the fixed

offshore platforms not required.

However, the lightning protection system should be insta

air termination rod and down conductors that will be bonded to the platform structural steel.

Lightning Surge Arresters shall be required for sensitive field instruments such as CCTV

cameras and antennas inside

arrestors shall be provided if recommended by the vendors for ESD/FGS cabinets, field

instruments, etc.


FEED BOD FOR KNT

g to the transformer must be provided when welding of equipment to foundation,


equipment including base plates, pedestal, drive, etc.

All cable racks / ladders / trays shall be earth bonded between sections and to welded steel

structures and in no event the intervals shall exceed 25m.

On cabinets or panels with hinged doors, earthing integrity shall be assured by the use of


sectional area of branch conductors connecting equipment and structures to the main

o metallic enclosure of MV electrical equipment : 70 mm²


sectional area > 35 mm²

: 70 mm²


sectional area < 35 mm²

: 25 mm²

To control panels. Etc. : 25 mm²

electrical equipment exposed to lightning, e.g. tanks,

columns and tall structures

: 70 mm²

electrical equipment : 25 mm²

Lightning Protect ion

shall be of fully structural steel construction welded to the jacket and


offshore platforms not required.

However, the lightning protection system should be installed on the top of crane, have separate



cameras and antennas inside PCS marshalling cabinet for field bus loops. Lightning surge


g to the transformer must be provided when welding of equipment to foundation,


shall be earth bonded between sections and to welded steel

integrity shall be assured by the use of


sectional area of branch conductors connecting equipment and structures to the main

70 mm²

70 mm²

25 mm²

25 mm²

70 mm²

25 mm²

shall be of fully structural steel construction welded to the jacket and


lled on the top of crane, have separate



arshalling cabinet for field bus loops. Lightning surge




Page 53 of 53

Furthermore, where the metal frame or steel structure is not welded to platform deck or

steelworks, and therefore is not continuous to earth, adequate bonding shall be provided.

Lightning protection for the KNT shall be designed in accordance with IEC 62305 ‘Protection

against Lightning’


FEED BOD FOR KNT


ks, and therefore is not continuous to earth, adequate bonding shall be provided.



ks, and therefore is not continuous to earth, adequate bonding shall be provided.


KNT-01-BD-E-0001_ELECTRICAL PRE-FEED BOD FOR KNT_B1_150413.pdf

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