ARC FLASH RISK ASSESSMENT REPORT · IEC/IEEE Std. 142-1991 (IEEE Green Book—see Section 1.6.4 and...

ARC FLASH STUDY

REPORT

ARC FLASH RISK ASSESSMENT REPORT

(REV 2019)

CLIENT: QATAR FUEL ADDITIVES COMPANY LIMITED

(QAFAC, QATAR)

CONDUCTED BY: M/s VIJAYA BHANU ENGINEERING INDIA PVT LTD

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002

Contents

1 Abbreviations 006

1.1 Organization and standard

1.2 Other Abbreviations

2 Executive Summery 007

3 Introduction 007-008

3.1 System Input Data for Calculations 008

3.2 Assumptions 008

3.3

System modes of Operation 008

4

Single Line Diagrams 009

5

Input Data 011-035

6

Short Circuit Analysis 036-042

6.1 General Procedure 036

6.2 Data Used in The Calculations 037

6.2.1 Power Company Data 037

6.2.2 Cable Data 037

6.2.3 Transformer Data 037

6.2.4

Motor Contribution to Short Circuit Current 037

6.3

Short Circuit Analysis Results 038

7 Protective Device Coordination Study 043-109


7.2

Specific Procedure 043

7.2.1 Time over Current relay Co-ordination 043

7.2.2 Low Voltage Breaker Settings 044

7.3 Analysis of Results 044

8 Arc Flash Risk Assessment 110-421


8.2 Specific Flash Risk Assessment Procedure 111

003

8.3 Arc Flash Calculations Based on IEEE1584 113

8.4 Analysis of Results 121

8.5 Observations 126

10 Recommendations 127

11 Arc Flash Labels 131

12 References 209

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005

1. ABBREVATIONS

1.1 Organizations and Standards

a) ANSI - American National Standards Institute. b) IEEE - Institute of Electrical and Electronics Engineers. c) IPCEA - Insulated Power Cable Engineers Association. d) NEMA - National Electrical Manufacturers Association. e) NFPA - National Fire Protection Association. f) NEC – National Electric Code. g) UL – Underwriters Laboratories, Inc.

1.2 Other Abbreviations. i. A - Amperes (RMS symmetrical) ii. AIC – Amperes Interrupting Capacity (Three-Phase RMS sym) iii. ASD - Adjustable Speed Ac Drive iv. ATS - Automatic Transfer Switch v. C/B - Circuit Breaker vi. CHP - Combined Horsepower vii. CFLA - Combined Full Load Amperes viii. CT - Current Transformer FLA - Full Load Amperes HP - Horsepower ix. IL - Max. Demand Load Current at PCC ISC - Short-Circuit Current at PCC x. KVA - Kilovolt-Ampere xi. KVAm - Kilovolt-Amperes of Motor Short Circuit contribution xii. KW - Kilowatt xiii. L-L - Line-To-Line xiv. LRA - Locked-Rotor Amperes xv. L.V. - Low Voltage xvi. MCC - Motor Control Center MCS - Molded Case Switch M ohms - Milliohms xvii. MV - Medium Voltage xviii. Mom – Momentary Current xix. O.L. - Overload xx. PCC - Point of Common Coupling xxi. PF - Power Factor xxii. PWM - Pulse Width Modulated xxiii. R - Resistance xxiv. RMS - Root-Mean-Square xxv. SCA - Short-Circuit Amperes xxvi. SCAM - Short-Circuit Amperes of Motor Contribution xxvii. S.F. - Service Factor sym. – Symmetrical xxviii. TCR - Trip Current Rating xxix. TDD - Total Demand Distortion xxx. THD - Total Harmonic Distortion xxxi. V - Line-To-Line Volts (RMS sym.) WCR - Withstand Current Rating xxxii. X - Reactance xxxiii. Z – Impedance xxxiv. %Z - Percent Impedance xxxv. SWBDS- Switch Board Distribution System

006

2. EXECUTIVE SUMMARY

M/s Qatar Fuel Additives Company Limited, QAFAC, QATAR Plant hired services of M/s Vijaya Bhanu Engineering India Pvt Ltd., Hyderabad, India for performing Arc Flash Risk Assessments for their electrical power distribution in their plant. This report contains the results of the Short circuit, Protective Device Coordination and Arc Flash Risk Assessment report by considering worst case as mode of operation of Plant.

The project objectives are to: a) Calculate the short circuit levels throughout the system and evaluate each equipment fault

rating at each study bus. b) Determine optimal settings for all over current protective devices. c) Compile the Arc flash hazards at each study location. Make corrections to system

coordination and provide corrective action recommendations to ensure the least amount of arc flash hazard exists.

3. INTRODUCTION

As per OSHA (Occupational Safety & Health Administration) & NFPA 70E 2018 Safety regulations, employee safety is most important while working. “The Employer shall ensure that each employee exposed to Electric Arcs shall not wear clothing that could increase injury when exposed to these Arcs”. NFPA-70E & its revision A2018 include “The Employer shall implement and document overall Electrical Safety program that directs activity appropriate for the voltage, energy level & Circuit conditions”. From Safety point of view, Electrical Safety auditing shall be conducted. NFPA-70E, revision A2018 guides, “An Electrical Safety program shall require auditing of the work being performed of an identified frequency to help assure that principals & procedure of electrical safety programs are being followed. All electrical safety procedure shall be reviewed & revised, based upon the auditing findings on frequency no greater than 3 years.”

Arc Flash Risk Assessments are performed to determine the risk to the personnel, warn them of the hazards, and to instruct them as to what kind of personal protective equipment that they must wear.

The short-circuit analysis evaluates the adequacy of a large portion of the electrical distribution equipment in the facility, based on the maximum available short-circuit current at its location. The study includes evaluation of all medium-voltage equipment and low voltage equipment. The arc flash risk assessment establishes the flash protection boundary around electrical equipment within which a worker exposed to an arcing fault would expect to receive 2nd degree burns if not adequately protected. The analysis also determines the incident energy level at a specific working distance from equipment, which can be used to select appropriate Personal Protective Equipment (PPE) to be worn when working within the flash protection boundary.

Section 3 provides introduction; Section 4 provides the Single Line Diagrams considered for the study and Section-5 provides the information of Input data collected during the visit. Section-6,7,8 provides the detailed reports of Short circuit, Protective Device Coordination and Arc Flash Risk Assessment reports respectively. Section-9 discuss about the Recommendations. Arc Flash Labels are provided in Section 10.

007

The Results of this study assumes that all devices are operational and properly calibrated. Regular testing and maintenance of the electrical equipment in the facility can help ensure proper device operation. Also, the recommended ground-fault settings assume that the facility’s power system is effectively grounded and bonded to complete a low-impedance path for ground-fault current. Regular testing and maintenance of the facility’s grounding system, as recommended in IEC/IEEE Std. 142-1991 (IEEE Green Book—see Section 1.6.4 and 4.1.6, for example) and IEC/IEEE Std 80- 1986, can help ensure continued proper operation of ground fault protective devices.

3.1 System Input Data for Calculations:

The results of the study were based on the technical information and single-line diagrams Compiled by QAFAC, as summarized below.

1. Single line diagrams.

2. The conductor & cable lengths, types, sizes, and motor data compiled from QAFAC.

3. The model and type of protective devices & their settings collected from QAFAC in technical data templates.

4. The Short Circuit Fault analysis includes the following equipment. Short circuit Contributions from motors rating less than 10KW –LV and 50HP-MV are not included in the study.

_ 33000V Power Supply from GIS Switchgear MIB & MID. _ Main 33KV/6.6KV Transformer (25 MVA x 4) _ 400V Distribution Switchgear units _ Typical Main Distribution Panels at various locations in the plant

3.2 System Modes of Operations:

We considered the following modes of operations for the study they are:

a) Worst Case: GIS Switchgear with MIB & MID feeding the networks.

008

4. Single Line Diagrams

009

5. Input Data

011

ETAPProject: IMPROVEMENT OF POWER SUPPLY RE

Location: QATAR

Contract: QTC-062-16_QAFAC

Engineer:

Filename: Arc Flash

Page: 1

Date: 15-09-2019

Revision: Base

Config: Normal Opera

LOAD FLOW ANALYSIS REPORT

19.0.0C

Transformer Schedule

Transformer ID kVA Prim. kV Sec. kV % Z X/R Pri. Sec.

2-Winding Transformer

% Tap Setting

% Tol.

Rating

Status

TR-021-L 33.000 6.90025000 9.5 3.000 0.000 0.0Energized 20.00

TR-021-R 33.000 6.90025000 9.5 3.000 0.000 0.0Energized 20.00

TR-031-L 6.600 0.4202000 6.0 2.000 0.000 0.0Energized 6.00

TR-031-R 6.600 0.4202000 6.0 2.000 0.000 0.0Energized 6.00

TR-032-L 6.600 0.4202000 6.0 2.000 0.000 0.0Energized 6.00

TR-032-R 6.600 0.4202000 6.0 2.000 0.000 0.0Energized 6.00

TR-033 6.600 0.4201000 5.0 1.000 0.000 0.0Energized 3.50

TR-131-L 6.600 0.4202000 6.0 2.000 0.000 0.0Energized 6.00

TR-131-R 6.600 0.4202000 6.0 2.000 0.000 0.0Energized 6.00

TR-132-L 6.600 0.4202000 6.0 2.000 0.000 0.0Energized 6.00

TR-132-R 6.600 0.4202000 6.0 2.000 0.000 0.0Energized 6.00

TR-133-L 6.600 0.4202000 6.0 2.000 0.000 0.0Energized 6.00

TR-133-R 6.600 0.4202000 6.0 2.000 0.000 0.0Energized 6.00

TR-221-L 33.000 6.90025000 9.5 3.000 0.000 0.0Energized 20.00

TR-221-R 33.000 6.90025000 9.5 3.000 0.000 0.0Energized 20.00

TR-231-L 6.600 0.4202000 6.0 1.000 0.000 0.0Energized 6.00

TR-231-R 6.600 0.4202000 6.0 1.000 0.000 0.0Energized 6.00

TR-232-L 6.600 0.4202000 6.0 1.000 0.000 0.0Energized 6.00

TR-232-R 6.600 0.4202000 6.0 1.000 0.000 0.0Energized 6.00

TR-233-L 6.600 0.4202000 6.0 1.000 0.000 0.0Energized 6.00

TR-233-R 6.600 0.4202000 6.0 1.000 0.000 0.0Energized 6.00

TR-234-L 6.600 0.4202000 6.0 1.000 0.000 0.0Energized 6.00

TR-234-R 6.600 0.4202000 6.0 1.000 0.000 0.0Energized 6.00

TR-235 6.600 0.4202000 6.0 1.000 0.000 0.0Energized 6.00

TR-331 6.600 0.4201250 6.2 2.000 0.000 0.0Energized 3.50

TR-431-L 6.600 0.420400 4.0 2.000 0.000 0.0Energized 1.50

TR-431-R 6.600 0.420400 4.0 2.000 0.000 0.0Energized 1.50

TR-531 6.600 0.420630 4.0 2.000 0.000 0.0Energized 1.50

012


Location: QATAR


Engineer:

Filename: Arc Flash

Page: 1

Date: 15-09-2019

Revision: Base



19.0.0C

Cable Data Schedule

Cable ID Library Size Length #/ph T (C) R X Y Impedance UnitStatus

240 2 90 0.09870 0.07030 0 Ohms per 1 km70-K001A (Future)-Feeder 200.00 mEnergizedCable Sizing, XLPE, 1.0, 100,

Copper, 3/C, Non-Mag., 90,1 km,5

0, Metric, 30 90 250 43 90

240 2 90 0.09870 0.07030 0 Ohms per 1 km70-K001B (Future)-Feeder 200.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

35 1 90 0.66800 0.11200 0 Ohms per 1 kmB-3201-FAM-Feeder 140.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

2.5 1 90 9.45000 0.09320 0 Ohms per 1 kmB-3201-FA-P-A/B-M-Feeder 169.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

400 1 90 0.06220 0.10200 0 Ohms per 1 kmC-1301M-Feeder 127.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

25 1 90 0.92700 0.07680 0 Ohms per 1 kmC-1301-P-A-M-Feeder 131.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

70 1 90 0.34200 0.10000 0 Ohms per 1 kmC-2101AM-Feeder 308.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

70 1 90 0.34200 0.10000 0 Ohms per 1 kmC-2101BM-Feeder 312.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

70 1 90 0.34200 0.07260 0 Ohms per 1 kmC-2201-P-B-M-Feeder 209.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

50 1 90 0.49400 0.10600 0 Ohms per 1 kmC-3501M-Feeder 152.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

4 1 90 5.88000 0.08750 0 Ohms per 1 kmC-3501-P-B-M-Feeder 114.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

4 1 90 5.88000 0.08750 0 Ohms per 1 kmC-3601-A-P-B-M-Feeder 132.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

35 1 90 0.66800 0.11200 0 Ohms per 1 kmC-3601BM-Feeder 161.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

70 1 90 0.34200 0.07260 0 Ohms per 1 kmE-1118-ACEGM-Feeder 288.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

70 1 90 0.34200 0.07260 0 Ohms per 1 kmE-1118-BDFHM-Feeder 282.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

95 1 90 0.24700 0.07080 0 Ohms per 1 kmE-1123LM1-Feeder 350.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

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Engineer:

Filename: Arc Flash

Page: 2

Date: 15-09-2019

Revision: Base



19.0.0C

Cable Data Schedule


95 1 90 0.24700 0.07080 0 Ohms per 1 kmE-1123LM2-Feeder 350.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

95 1 90 0.24700 0.07080 0 Ohms per 1 kmE-1123RM1-Feeder 332.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

95 1 90 0.24700 0.07080 0 Ohms per 1 kmE-1123RM1-Feeder2 332.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

95 1 90 0.24700 0.07080 0 Ohms per 1 kmE-1123RM2-Feeder 332.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

50 1 90 0.49400 0.07390 0 Ohms per 1 kmE-2105AM-Feeder 138.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

50 1 90 0.49400 0.07390 0 Ohms per 1 kmE-2105BM-Feeder 145.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

70 1 90 0.34200 0.07260 0 Ohms per 1 kmE-2111-AM-Feeder 248.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

70 1 90 0.34200 0.07260 0 Ohms per 1 kmE-2111-BM-Feeder 240.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

35 1 90 0.66900 0.07430 0 Ohms per 1 kmE-2205-A/CM-Feeder 204.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

35 1 90 0.66900 0.07430 0 Ohms per 1 kmE-2205-B/DM-Feeder 195.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

50 1 90 0.49400 0.07390 0 Ohms per 1 kmE-2240-A/CM-Feeder 181.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

50 1 90 0.49400 0.07390 0 Ohms per 1 kmE-2240-B/DM-Feeder 173.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

16 1 90 1.47000 0.07610 0 Ohms per 1 kmE-2312AM-Feeder 151.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

16 1 90 1.47000 0.07610 0 Ohms per 1 kmE-2312BM-Feeder 147.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

630 4 90 0.04050 0.08720 0 Ohms per 1 kmESG-131-Feeder 554.00 mDe-energizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

240 4 90 0.09870 0.07030 0 Ohms per 1 kmESG-331-Feeder 388.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

25 1 90 0.92700 0.07680 0 Ohms per 1 kmFA-1201-P-A-M-Feeder 223.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

150 1 90 0.15900 0.08970 0 Ohms per 1 kmFA-1202M-Feeder 247.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

50 1 90 0.49400 0.10600 0 Ohms per 1 kmFA-1401-M-Feeder 200.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90 014


Location: QATAR


Engineer:

Filename: Arc Flash

Page: 3

Date: 15-09-2019

Revision: Base



19.0.0C

Cable Data Schedule


185 2 90 0.12800 0.07120 0 Ohms per 1 kmFA-2602M-Feeder 233.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

70 1 90 0.34200 0.07260 0 Ohms per 1 kmFA-2603-M-Feeder 239.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

630 2 90 0.04050 0.08720 0 Ohms per 1 kmG-3901-Feeder 82.000 mDe-energizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

300 2 90 0.07910 0.11938 0 Ohms per 1 kmKahramaa Feeder E10 2265 mEnergizedCable Sizing, XLPE,36, 100,


0, Metric, 40 90 250 43 90

300 2 90 0.07910 0.11938 0 Ohms per 1 kmKAHRAMAA FEEDER E110 750.00 mEnergizedCable Sizing, XLPE,36, 100,


0, Metric, 40 90 250 43 90

300 2 90 0.07910 0.11938 0 Ohms per 1 kmKAHRAMAA FEEDER E130 750.00 mEnergizedCable Sizing, XLPE,36, 100,


0, Metric, 40 90 250 43 90

300 2 90 0.07910 0.11938 0 Ohms per 1 kmKahramaa Feeder E20 2265 mEnergizedCable Sizing, XLPE,36, 100,


0, Metric, 40 90 250 43 90

70 1 90 0.34200 0.07260 0 Ohms per 1 kmME-1102-PM-Feeder 169.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

120 2 90 0.19600 0.07050 0 Ohms per 1 kmME-2101-CM-Feeder 255.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

4 1 90 5.88000 0.08750 0 Ohms per 1 kmME-2101-P-AM-Feeder 255.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

185 1 90 0.12800 0.07120 0 Ohms per 1 kmP-1001AM-Feeder 270.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

185 1 90 0.12800 0.07120 0 Ohms per 1 kmP-1001BM-Feeder 261.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

35 1 90 0.66800 0.11200 0 Ohms per 1 kmP-1101CM-Feeder 269.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90 015


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Engineer:

Filename: Arc Flash

Page: 4

Date: 15-09-2019

Revision: Base



19.0.0C

Cable Data Schedule




0, Metric, 30 90 250 43 90

50 1 90 0.49400 0.07390 0 Ohms per 1 kmP-1110-A-M-Feeder 138.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

50 1 90 0.49400 0.07390 0 Ohms per 1 kmP-1110-B-M-Feeder 136.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

35 1 90 0.66800 0.11200 0 Ohms per 1 kmP-1118-C-M-Feeder 200.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

50 1 90 0.49400 0.10600 0 Ohms per 1 kmP-1453A-M-Feeder 200.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

50 1 90 0.49400 0.10600 0 Ohms per 1 kmP-1453B-M-Feeder 200.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

2.5 1 90 9.45000 0.09320 0 Ohms per 1 kmP-2204-M-Feeder 144.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

150.0 1 90 0.16000 0.07090 0 Ohms per 1 kmP-2301AM-Feeder 200.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90 016


Location: QATAR


Engineer:

Filename: Arc Flash

Page: 5

Date: 15-09-2019

Revision: Base



19.0.0C

Cable Data Schedule


2.5 1 90 9.45000 0.09320 0 Ohms per 1 kmP-2301-A-P-M-Feeder 213.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

150.0 1 90 0.16000 0.07090 0 Ohms per 1 kmP-2301BM-Feeder 201.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

2.5 1 90 9.45000 0.09320 0 Ohms per 1 kmP-2301-B-P-M-Feeder 213.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

35 1 90 0.66900 0.07430 0 Ohms per 1 kmP-3104-AM-Feeder 615.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90 017


Location: QATAR


Engineer:

Filename: Arc Flash

Page: 6

Date: 15-09-2019

Revision: Base



19.0.0C

Cable Data Schedule




0, Metric, 30 90 250 43 90

4 1 90 5.88000 0.08750 0 Ohms per 1 kmP-3201-A-P-B-M-Feeder 190.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

2.5 1 90 9.45000 0.09320 0 Ohms per 1 kmP-3205-A/B-M-Feeder 213.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

120 1 90 0.19600 0.07050 0 Ohms per 1 kmP-3405-A/B-M-Feeder 169.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

120 1 90 0.19600 0.07050 0 Ohms per 1 kmP-3405-C-M-Feeder 166.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

50 1 90 0.49400 0.10600 0 Ohms per 1 kmP-3XXX-A-MFuture-Feeder 200.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

50 1 90 0.49400 0.10600 0 Ohms per 1 kmP-3XXX-B-M(Future)-Feeder 200.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

185 1 90 0.12800 0.08730 0 Ohms per 1 kmP-5201DM-Feeder 294.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

500 3 90 0.05020 0.08780 0 Ohms per 1 kmSG-033-Feeder 52.000 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

630 2 90 0.04000 0.09530 0 Ohms per 1 kmSG-421L-Feeder 1206 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90 018


Location: QATAR


Engineer:

Filename: Arc Flash

Page: 7

Date: 15-09-2019

Revision: Base



19.0.0C

Cable Data Schedule


630 2 90 0.04000 0.09530 0 Ohms per 1 kmSG-421R-Feeder 1216 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

500 1 90 0.05020 0.08780 0 Ohms per 1 kmSG-431L-Feeder 31.000 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

500 1 90 0.05020 0.08780 0 Ohms per 1 kmSG-431R-Feeder 33.000 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

300 2 90 0.07810 0.12300 0 Ohms per 1 kmTR-021L-Feeder 160.00 mEnergizedCable Sizing, XLPE,36, 100,


0, Metric, 30 90 250 43 90

300 2 90 0.07810 0.12300 0 Ohms per 1 kmTR-021R-Feeder 153.00 mEnergizedCable Sizing, XLPE,36, 100,


0, Metric, 30 90 250 43 90

150 1 90 0.15900 0.08970 0 Ohms per 1 kmTR-031L-Feeder 66.000 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

150 1 90 0.15900 0.08970 0 Ohms per 1 kmTR-031R-Feeder 61.000 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

150 1 90 0.15900 0.08970 0 Ohms per 1 kmTR-033-Feeder 46.000 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

300 2 90 0.07810 0.12300 0 Ohms per 1 kmTR-221L-Feeder 418.00 mEnergizedCable Sizing, XLPE,36, 100,


0, Metric, 30 90 250 43 90

300 2 90 0.07810 0.12300 0 Ohms per 1 kmTR-221R-Feeder 423.00 mEnergizedCable Sizing, XLPE,36, 100,


0, Metric, 30 90 250 43 90 019


Location: QATAR


Engineer:

Filename: Arc Flash

Page: 8

Date: 15-09-2019

Revision: Base



19.0.0C

Cable Data Schedule




0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90



0, Metric, 30 90 250 43 90

150 1 90 0.15900 0.08970 0 Ohms per 1 kmTR-531-Feeder 2059 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

185 1 90 0.12800 0.08730 0 Ohms per 1 kmX-1103-C-A-M-Feeder 200.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

185 1 90 0.12800 0.08730 0 Ohms per 1 kmX-1103-C-B-M-Feeder 200.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

185 1 90 0.12800 0.08730 0 Ohms per 1 kmX-1104-C-A-M-Feeder 200.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

185 1 90 0.12800 0.08730 0 Ohms per 1 kmX-1104-C-B-M-Feeder 200.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

150 1 90 0.15900 0.08970 0 Ohms per 1 kmX-2701-CM-Feeder 224.00 mEnergizedCable Sizing, XLPE, 6.6, 100,


0, Metric, 30 90 250 43 90

10 1 90 2.33000 0.07850 0 Ohms per 1 kmX-3502-G-P-A-M-Feeder 105.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90 020


Location: QATAR


Engineer:

Filename: Arc Flash

Page: 9

Date: 15-09-2019

Revision: Base



19.0.0C

Cable Data Schedule


10 1 90 2.33000 0.07850 0 Ohms per 1 kmX-3502-G-P-B-M-Feeder 106.00 mEnergizedCable Sizing, XLPE, 1.0, 100,


0, Metric, 30 90 250 43 90

021

Project: IMPROVEMENT OF POWER SUPPLY RE

Location: QATAR


Engineer:

Filename: Arc Flash

ETAP19.0.0C

Load Feeder Tag Name

&

Description

Page: 1

Date: 15-09-2019

Revision: Base



Connected Bus ID FDR Tag Name DescriptionState

C-2201-P-B-M R.E.C LUBE OIL PUMPESG-031 Energized

ESG031-Conti. ESG-031 SWGR Continuous loadESG-031 Energized

ESG031-Future ESG-031 SWGR Future loadESG-031 Energized

ESG031-Mtr Conti. ESG-031 SWGR Continuous loadESG-031 Energized

ESG031-Std. ESG-031 SWGR Stand-by loadESG-031 Energized

P-2201AM Circulating Water PumpESG-031 Energized

P-2201BM Circulating Water PumpESG-031 Energized

P-2204-M SULFUR INJECTION PUMPESG-031 Energized




P-2301AM Ethermax methanol feed pumpESG-131 Energized

P-2301BM Ethermax methanol feed pumpESG-131 Energized

B-3201-FA-P-A/B-M No.1 and No.2 Utility Boiler FDF L

/O Pump

ESG-231 Energized

C-1301-P-A-M Inlet gas compressor L/O PumpESG-231 Energized

C-3601-A-P-B-M Inst/Utility Air compressor L/O

Pump

ESG-231 Energized


ESG231-Intr. ESG-231 SWGR Intermittant loadESG-231 Energized

ESG231-Mtr Conti. ESG-231 SWGR Continuous loadESG-231 Energized

ESG231-Std. ESG-231 SWGR Stand-By loadESG-231 Energized

FA-1201-P-A-M Fuel gas fan turbine L/O pumpESG-231 Energized

ME-1102-PM C-1101, C-1102 L/O PumpESG-231 Energized

P-3201-A-P-B-M Methanol BFW L/O PumpESG-231 Energized

P-3205-A/B-M Oxygen Scavenger Injection PumpESG-231 Energized

P-3206-AM LP Phosphate Boiler Injection

Pump

ESG-231 Energized

P-3207-A/BM Neutralizing Amine Injection

Pumps

ESG-231 Energized

P-3405-A/B-M Demineralized water pumpESG-231 Energized

P-3405-C-M Demineralized water pumpESG-231 Energized




ESG-631_Future Future ESG-631 SWGR load (N-ZL

D)

ESG-331 Energized

P-3112-B-M Fresh water pumpESG-331 Energized






C-2101AM Make-Up Gas CompressorMC-022-L Energized

P-2101AM Deisobutanizer Overhead PumpMC-022-L Energized

P-2102AM Butamer Charge PumpMC-022-L Energized

P-2303AM Reactor Recycle PumpMC-022-L Energized

P-2305AM Raffinate PumpMC-022-L Energized

022


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ETAP19.0.0C


&

Description

Page: 2

Date: 15-09-2019

Revision: Base




P-2701AM Flash Drum pumpMC-022-L Energized

C-2101BM Make-Up Gas CompressorMC-022-R Energized

P-2101BM Deisobutanizer Overhead PumpMC-022-R Energized

P-2102BM Butamer Charge PumpMC-022-R Energized

P-2303BM Reactor Recycle PumpMC-022-R Energized

P-2305BM Raffinate PumpMC-022-R Energized

P-2701BM Flash Drum pumpMC-022-R Energized

B-3201-FAM No.1 Utility boiler forced draft fanMC-222-L Energized



P-1101AM Saturated water pumpMC-222-L Energized

P-1101BM Instrument/ utility air compressorMC-222-L Energized

P-1118-A-M Chilled water pumpMC-222-L Energized

P-1453A-M Sea water circulation pump CO2 recovery plantMC-222-L Energized

P-3105AM Methanol Product loading pumpMC-222-L Energized

P-3109AM Fire water pumpMC-222-L Energized

P-3XXX-A-M (Future) FEED for MTBE Tanks & Pipeline B

/W QAFAC &QP Refin

CO2 recovery plantMC-222-L Energized

C-3601BM Saturated water pumpMC-222-R Energized

FA-1401-M Flue Gas Blower CO2 recovery PlantMC-222-R Energized

P-1101CM Saturated water pumpMC-222-R Energized

P-1118-B-M Chilled water pumpMC-222-R Energized

P-1118-C-M Chilled water pumpMC-222-R Energized

P-1453B-M Sea water circulation pump CO2 recovery plantMC-222-R Energized

P-3105BM Methanol product loading pumpMC-222-R Energized

P-3202CM Utility BFW pumpMC-222-R Energized

P-3XXX-B-M (Future) FEED for MTBE Tanks & Pipeline B

/W QAFAC &QP Refin

CO2 recovery plantMC-222-R Energized

SC-021-LSG-021-L Energized

SG-631_Future FutureSG-631+ESG-631 LoadSG-021-L Energized

H-2401_Future Future Salt Bath HeaterSG-021-R Energized

SC-021-RSG-021-R Energized

X-2701-CM Refrigerant CompressorSG-021-R Energized

SG031L-Conti. SG-031L SWGR Continuous loadSG-031-L Energized

SG031L-Std. SG-031L SWGR Stand-By loadSG-031-L Energized

SG031R-Conti. SG-031R SWGR Continuous loadSG-031-R Energized

SG031R-Future SG-031R SWGR Future loadSG-031-R Energized

SG031R-Std. SG-031R SWGR Stand-By loadSG-031-R Energized

E-2111-AM Stabilizer condenserSG-032-L Energized

E-2205-A/CM REC discharge coolerSG-032-L Energized

E-2240-A/CM Wash oil circulation coolerSG-032-L Energized

ME-2101-CM Butamer Refrigerant CompressorSG-032-L Energized

ME-2101-P-AM Butamer refrigerant Lube Oil PumpSG-032-L Energized


SG032L-Future SG-032L SWGR Future loadSG-032-L Energized

SG032L-Intr. SG-032L SWGR Intermittant loadSG-032-L Energized

023


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Filename: Arc Flash

ETAP19.0.0C


&

Description

Page: 3

Date: 15-09-2019

Revision: Base




SG032L-Mtr Conti. SG-032L SWGR Continuous loadSG-032-L Energized


E-2111-BM Stabilizer condenserSG-032-R Energized

E-2205-B/DM REC discharge coolerSG-032-R Energized

E-2240-B/DM Wash oil circulation coolerSG-032-R Energized

FA-2602M Regeneration BlowerSG-032-R Energized

FA-2603-M Regeneration cooler blowerSG-032-R Energized

P-2240-B-M WASH OIL CIRCULATION PUMPSG-032-R Energized


SG032R-Intr. SG-032R SWGR Intermittant loadSG-032-R Energized

SG032R-Mtr Conti. SG-032R SWGR Continuous loadSG-032-R Energized


H-2206 Reduction Gas HeaterSG-033 Energized

H-2207 Reactor No.2 surge pot heaterSG-033 Energized

H-2208 Reactor No.3 surge pot heaterSG-033 Energized

H-2602 Regeneration HeaterSG-033 Energized

H-2603 Air HeaterSG-033 Energized

P-2301-A-P-M METHANOL FEED PUMP

PRIMING PUMP

SG-131-L Energized

P-2451AM CSP feed pumpSG-131-L Energized




SG131L-Std. SG-131L SWGR Stand-by loadSG-131-L Energized

P-2301-B-P-M METHANOL FEED PUMP

PRIMING PUMP

SG-131-R Energized

P-2451BM CSP feed pumpSG-131-R Energized


SG131R-Std. SG-131R SWGR Stand-by loadSG-131-R Energized

P-2302AM Isobutylene feed pumpSG-132-L Energized





P-2302BM Isobutylene feed pumpSG-132-R Energized




E-2105AM Deisobutanizer overhead condenserSG-133-L Energized

E-2312-AM METHANOL COLUMN

CONDENSER

SG-133-L Energized



E-2105BM Deisobutanizer overhead condenserSG-133-R Energized

E-2312-BM METHANOL COLUMN

CONDENSER

SG-133-R Energized


024


Location: QATAR


Engineer:

Filename: Arc Flash

ETAP19.0.0C


&

Description

Page: 4

Date: 15-09-2019

Revision: Base






C-1301M Inlet gas compressorSG-221-L Energized

C-3501M N2 generation air compressorSG-221-L Energized

FA-1202M Cumbustion air fanSG-221-L Energized

P-3106AM MTBE Product loading pumpSG-221-L Energized

SC-221-LSG-221-L Energized

X-1103-C-A-M Refrigeration compressor motorSG-221-L Energized

X-1103-C-B-M Refrigeration compressor motorSG-221-L Energized

P-3106BM MTBE Product loading pumpSG-221-R Energized

P-3201BM Methanol BFW pumpSG-221-R Energized

SG221-CAP-RSG-221-R Energized

X-1104-C-A-M Refrigeration compressor motorSG-221-R Energized

X-1104-C-B-M Refrigeration compressor motorSG-221-R Energized

E-1118-ACEGM Light end column condenserSG-231-L Energized

P-1001AM Plant 100 steam condensate pumpSG-231-L Energized





X-3502-G-P-A-M N2 cold box expan. turbine L/O

pump

SG-231-L Energized

C-3501-P-B-M N2 generation air compressor L/O

pump

SG-231-R Energized

E-1118-BDFHM Light end column condenserSG-231-R Energized

P-1001BM Plant 100 steam condensate pumpSG-231-R Energized





X-3502-G-P-B-M N2 cold box expan. turbine L/O

pump

SG-231-R Energized

E-1123-LM1 Refined Methanol CondenserSG-232-L Energized

E-1123-LM2 Refined Methanol CondenserSG-232-L Energized



E-1123-BM Refined methanol condenserSG-232-R Energized

E-1123-RM1 Refined methanol condenserSG-232-R Energized

E-1123RM2 Refined methanol condenserSG-232-R Energized



70-K001A (Future) SCNR Proj. Air CompressorSG-233-L Energized

P-1110-A-M CIRCULATOR TURBINE

CONDENSATE PUMP

SG-233-L Energized

P-1111-A-M SYN. GAS TURBINE

CONDENSATE PUMP

SG-233-L Energized



025


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ETAP19.0.0C


&

Description

Page: 5

Date: 15-09-2019

Revision: Base






70-K001B (Future) SNCR Proj. Air CompressorSG-233-R Energized

P-1110-B-M CIRCULATOR TURBINE

CONDENSATE PUMP

SG-233-R Energized

P-1111-B-M SYN. GAS TURBINE

CONDENSATE PUMP

SG-233-R Energized





P-3203AM Condensate storage pumpSG-234-L Energized





P-3203BM Condensate storage pumpSG-234-R Energized




P-3801BM Cooling water pumpSG-235 Energized

SG235-Mtr Conti. SG-235 SWGR Continuous loadSG-235 Energized

SG235-Std. SG-235 SWGR Stand-By loadSG-235 Energized

P-1108BM Refined methanol transfer pumpSG-331 Energized

P-3104-A-M METHANOL FEED PUMPSG-331 Energized

SG331-Conti. SG-331 SWGR Continuous loadSG-331 Energized

SG331-Future SG-331 SWGR Future loadSG-331 Energized



P-5201AM Sea water pumpSG-421-L Energized

P-5201CM Sea water pumpSG-421-L Energized

ME-5201-X Transformer / Rectifier for ME-5201XSG-421-R De-energized

P-5201BM Sea water pumpSG-421-R Energized

P-5201DM Sea water pumpSG-421-R Energized







SG431R-Mtr Conti. SG-431R SWGR Continuous loadSG-431-R De-energized


SG531-Conti. SG-531 SWGR Continuous loadSG-531 Energized

SG531-Future SG-531 SWGR Future loadSG-531 Energized

SG531-Intr. SG-531 SWGR Intermittent loadSG-531 Energized


026


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&

Description

Page: 6

Date: 15-09-2019

Revision: Base





027


Location: QATAR


Engineer:

Filename: Arc Flash

Page: 1

Date: 9-15-19

Revision: Base

Config.: Normal Opera


Bus Loading

19.0.0C

Connected Bus ID Load ID Feeder Tag Qty Status Rating kVA kV % PF % EFFUnit

C-2201-P-B-M 0.400 1 83.00 96.10 46.39Spare 37.0 kWESG-031

ESG031-Conti. 0.400 93.04 253.99ContinuousESG-031

ESG031-Future 0.400 80.00 249.50ContinuousESG-031

ESG031-Mtr Conti. 0.400 77.83 5.26ContinuousESG-031

ESG031-Std. 0.400 79.34 17.60SpareESG-031

P-2201AM 0.400 1 87.40 96.10 130.97Continuous 110.0 kWESG-031

P-2201BM 0.400 1 87.40 96.10 130.97Spare 110.0 kWESG-031

P-2204-M 0.400 3 85.00 96.10 0.49Continuous 0.4 kWESG-031



ESG131-Std. 0.400 49.99 19.28SpareESG-131

P-2301AM 0.400 1 93.00 92.00 87.66Continuous 75.0 kWESG-131

P-2301BM 0.400 1 93.00 92.00 87.66Spare 75.0 kWESG-131

B-3201-FA-P-A/B-M 0.400 1 85.00 80.60 2.17Spare 1.5 kWESG-231

C-1301-P-A-M 0.400 1 85.00 91.10 19.37Continuous 15.0 kWESG-231

C-3601-A-P-B-M 0.400 1 88.00 84.00 5.41Spare 4.0 kWESG-231


ESG231-Intr. 0.400 87.65 43.10IntermittentESG-231

ESG231-Mtr Conti. 0.400 80.58 15.91ContinuousESG-231

ESG231-Std. 0.400 79.77 235.80SpareESG-231

FA-1201-P-A-M 0.400 1 85.00 89.70 15.12Continuous 11.0 kWESG-231

ME-1102-PM 0.400 1 87.00 93.40 55.38Spare 45.0 kWESG-231

P-3201-A-P-B-M 0.400 1 85.00 83.40 3.10Spare 2.2 kWESG-231

P-3205-A/B-M 0.400 2 84.00 74.00 0.32Continuous 0.2 kWESG-231

P-3206-AM 0.400 69.80 1.10ContinuousESG-231

P-3207-A/BM 0.400 69.91 1.26ContinuousESG-231

P-3405-A/B-M 0.400 2 89.00 93.00 108.74Continuous 90.0 kWESG-231

P-3405-C-M 0.400 1 89.00 93.00 108.74Spare 90.0 kWESG-231



ESG331-Std. 0.400 74.26 14.53SpareESG-331

ESG-631_Future 0.400 80.00 257.00ContinuousESG-331

P-3112-B-M 0.400 1 93.00 91.00 64.99Spare 55.0 kWESG-331



ESG431-Std. 0.400 74.57 10.31SpareESG-431


ESG531-Std. 0.400 79.28 4.04SpareESG-531

C-2101AM 6.600 1 92.00 94.60 999.63Continuous 870.0 kWMC-022-L

P-2101AM 6.600 1 87.00 95.00 580.76Continuous 480.0 kWMC-022-L

P-2102AM 6.600 1 88.00 94.00 241.78Spare 200.0 kWMC-022-L

P-2303AM 6.600 1 88.00 94.00 223.65Spare 185.0 kWMC-022-L

P-2305AM 6.600 1 88.00 94.00 223.65Spare 185.0 kWMC-022-L


C-2101BM 6.600 1 91.00 94.60 1010.62Spare 870.0 kWMC-022-R

P-2101BM 6.600 1 87.00 95.00 580.76Spare 480.0 kWMC-022-R

P-2102BM 6.600 1 88.00 94.00 241.78Continuous 200.0 kWMC-022-R 028


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Filename: Arc Flash

Page: 2

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Revision: Base



Bus Loading

19.0.0C


P-2303BM 6.600 1 88.00 94.00 223.65Continuous 185.0 kWMC-022-R

P-2305BM 6.600 1 88.00 94.00 223.65Continuous 185.0 kWMC-022-R

P-2701BM 6.600 1 90.00 94.10 264.49Spare 224.0 kWMC-022-R

B-3201-FAM 6.600 1 87.10 95.70 536.26Spare 447.0 kWMC-222-L

B-3202-FAM 6.600 1 87.10 95.70 536.26Spare 447.0 kWMC-222-L

B-3203-FAM 6.600 1 87.40 95.10 537.79Spare 447.0 kWMC-222-L


P-1101BM 6.600 1 93.00 95.20 355.79Spare 315.0 kWMC-222-L

P-1118-A-M 6.600 1 87.00 94.50 255.43Continuous 210.0 kWMC-222-L

P-1453A-M 6.600 1 82.00 94.70 785.54Spare 610.0 kWMC-222-L

P-3105AM 6.600 1 91.00 95.50 1081.64Spare 940.0 kWMC-222-L

P-3109AM 6.600 1 88.00 96.50 536.98Spare 456.0 kWMC-222-L

P-3XXX-A-M (Future) 6.600 1 80.00 85.00 235.29Spare 160.0 kWMC-222-L

C-3601BM 6.600 1 92.19 93.35 560.08Continuous 482.0 kWMC-222-R

FA-1401-M 6.600 1 87.00 95.30 832.22Continuous 690.0 kWMC-222-R

P-1101CM 6.600 1 88.00 88.75 403.33Spare 315.0 kWMC-222-R

P-1118-B-M 6.600 1 87.00 94.50 255.43Continuous 210.0 kWMC-222-R

P-1118-C-M 6.600 1 87.00 94.50 255.43Spare 210.0 kWMC-222-R

P-1453B-M 6.600 1 85.00 94.70 757.81Continuous 610.0 kWMC-222-R

P-3105BM 6.600 1 91.00 95.50 1081.64Spare 940.0 kWMC-222-R

P-3202CM 6.600 1 89.00 94.50 439.93Spare 370.0 kWMC-222-R

P-3XXX-B-M (Future) 6.600 1 80.00 85.00 235.29Continuous 160.0 kWMC-222-R

SC-021-L 6.600 5 500.00ContinuousSG-021-L

SG-631_Future FutureSG-631+ESG-631

Load

6.600 83.00 1485.00ContinuousSG-021-L

H-2401_Future Future Salt Bath Heater 6.600 1 80.00 1470.60ContinuousSG-021-R

SC-021-R 6.600 5 500.00ContinuousSG-021-R

X-2701-CM 6.600 1 89.00 95.40 1766.66Continuous 1500.0 kWSG-021-R

SG031L-Conti. 0.400 86.42 330.71ContinuousSG-031-L

SG031L-Std. 0.400 80.00 156.38SpareSG-031-L

SG031R-Conti. 0.400 80.00 243.64ContinuousSG-031-R

SG031R-Future 0.400 80.00 367.10ContinuousSG-031-R

SG031R-Std. 0.400 80.00 109.65SpareSG-031-R

E-2111-AM 0.400 1 85.00 92.30 38.24Continuous 30.0 kWSG-032-L

E-2205-A/CM 0.400 2 86.00 90.00 23.90Continuous 18.5 kWSG-032-L

E-2240-A/CM 0.400 2 85.00 92.30 38.24Continuous 30.0 kWSG-032-L

ME-2101-CM 0.400 1 89.00 95.40 131.91Continuous 112.0 kWSG-032-L

ME-2101-P-AM 0.400 1 83.00 76.80 2.35Continuous 1.5 kWSG-032-L


SG032L-Future 0.400 80.00 402.36ContinuousSG-032-L

SG032L-Intr. 0.400 79.99 39.38IntermittentSG-032-L

SG032L-Mtr Conti. 0.400 84.00 316.07ContinuousSG-032-L

SG032L-Std. 0.400 100.00 3.00SpareSG-032-L

E-2111-BM 0.400 1 85.00 92.30 38.24Continuous 30.0 kWSG-032-R

E-2205-B/DM 0.400 2 86.00 90.00 23.90Continuous 18.5 kWSG-032-R

E-2240-B/DM 0.400 2 85.00 92.30 38.24Continuous 30.0 kWSG-032-R

FA-2602M 0.400 1 92.00 94.50 166.78Continuous 145.0 kWSG-032-R

029


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Engineer:

Filename: Arc Flash

Page: 3

Date: 9-15-19

Revision: Base



Bus Loading

19.0.0C


FA-2603-M 0.400 1 90.00 92.70 41.95Continuous 35.0 kWSG-032-R

P-2240-B-M 0.400 1 87.40 94.50 133.18Spare 110.0 kWSG-032-R


SG032R-Intr. 0.400 79.99 26.88IntermittentSG-032-R

SG032R-Mtr Conti. 0.400 86.86 211.94ContinuousSG-032-R

SG032R-Std. 0.400 86.05 146.77SpareSG-032-R

H-2206 0.400 1 100.00 108.60ContinuousSG-033

H-2207 0.400 1 100.00 121.90ContinuousSG-033

H-2208 0.400 1 100.00 121.90ContinuousSG-033

H-2602 0.400 1 100.00 349.00ContinuousSG-033

H-2603 0.400 1 100.00 73.10ContinuousSG-033

P-2301-A-P-M 0.400 1 85.00 96.10 0.49Continuous 0.4 kWSG-131-L

P-2451AM 0.400 1 89.00 94.00 179.30Continuous 150.0 kWSG-131-L




SG131L-Std. 0.400 80.00 98.82SpareSG-131-L

P-2301-B-P-M 0.400 1 85.00 96.10 0.49Spare 0.4 kWSG-131-R

P-2451BM 0.400 1 89.00 94.00 179.30Spare 150.0 kWSG-131-R


SG131R-Std. 0.400 86.31 563.41SpareSG-131-R





SG132L-Std. 0.400 92.41 4.45SpareSG-132-L

P-2302BM 0.400 1 89.00 94.00 179.30Spare 150.0 kWSG-132-R



SG132R-Std. 0.400 90.87 234.84SpareSG-132-R

E-2105AM 0.400 1 83.00 93.00 47.93Continuous 37.0 kWSG-133-L

E-2312-AM 0.400 1 86.00 88.30 14.49Continuous 11.0 kWSG-133-L



E-2105BM 0.400 1 83.00 93.00 47.93Continuous 37.0 kWSG-133-R




SG133R-Std. 0.400 88.88 12.96SpareSG-133-R

C-1301M 6.600 1 91.00 96.60 4667.49Continuous 4103.0 kWSG-221-L

C-3501M 6.600 1 92.00 96.20 1053.06Continuous 932.0 kWSG-221-L

FA-1202M 6.600 1 86.00 95.90 1358.00Continuous 1120.0 kWSG-221-L

P-3106AM 6.600 1 89.00 95.60 1175.31Spare 1000.0 kWSG-221-L

SC-221-L 6.600 5 500.00ContinuousSG-221-L

X-1103-C-A-M 6.600 1 89.00 92.00 1831.95Continuous 1500.0 kWSG-221-L

X-1103-C-B-M 6.600 1 89.00 92.00 1831.95Continuous 1500.0 kWSG-221-L

P-3106BM 6.600 1 89.00 95.60 1175.31Spare 1000.0 kWSG-221-R 030


Location: QATAR


Engineer:

Filename: Arc Flash

Page: 4

Date: 9-15-19

Revision: Base



Bus Loading

19.0.0C


P-3201BM 6.600 1 91.00 96.00 2174.91Spare 1900.0 kWSG-221-R

SG221-CAP-R 6.600 4 500.00ContinuousSG-221-R

X-1104-C-A-M 6.600 1 89.00 93.15 1809.33Continuous 1500.0 kWSG-221-R

X-1104-C-B-M 6.600 1 89.00 93.70 1798.71Continuous 1500.0 kWSG-221-R

E-1118-ACEGM 0.400 4 85.00 92.30 38.24Continuous 30.0 kWSG-231-L





SG231L-Std. 0.400 79.75 53.37SpareSG-231-L

X-3502-G-P-A-M 0.400 1 81.00 80.00 7.10Continuous 4.6 kWSG-231-L

C-3501-P-B-M 0.400 1 89.00 86.20 5.21Spare 4.0 kWSG-231-R

E-1118-BDFHM 0.400 4 85.00 92.30 38.24Continuous 30.0 kWSG-231-R

P-1001BM 0.400 1 86.00 93.50 111.93Spare 90.0 kWSG-231-R




SG231R-Std. 0.400 84.56 88.97SpareSG-231-R

X-3502-G-P-B-M 0.400 1 81.00 89.00 6.38Spare 4.6 kWSG-231-R

E-1123-LM1 0.400 9 83.00 93.00 47.93Continuous 37.0 kWSG-232-L

E-1123-LM2 0.400 9 83.00 93.00 47.93Continuous 37.0 kWSG-232-L




E-1123-RM1 0.400 8 83.00 93.00 47.93Continuous 37.0 kWSG-232-R

E-1123RM2 0.400 9 83.00 93.00 47.93Continuous 37.0 kWSG-232-R


SG232R-Std. 0.400 83.95 124.96SpareSG-232-R

70-K001A (Future) 0.400 1 92.00 92.00 172.50Continuous 146.0 kWSG-233-L

P-1110-A-M 0.400 1 85.00 92.00 38.36Continuous 30.0 kWSG-233-L

P-1111-A-M 0.400 1 85.00 92.00 38.36Continuous 30.0 kWSG-233-L




SG233L-Std. 0.400 80.00 263.50SpareSG-233-L

70-K001B (Future) 0.400 1 92.00 92.00 172.50Spare 146.0 kWSG-233-R

P-1110-B-M 0.400 1 85.00 92.00 38.36Spare 30.0 kWSG-233-R

P-1111-B-M 0.400 1 85.00 92.00 38.36Spare 30.0 kWSG-233-R




SG233R-Std. 0.400 85.88 537.38SpareSG-233-R





SG234L-Std. 0.400 85.19 37.93SpareSG-234-L 031


Location: QATAR


Engineer:

Filename: Arc Flash

Page: 5

Date: 9-15-19

Revision: Base



Bus Loading

19.0.0C


P-3203BM 0.400 1 86.00 93.00 93.77Spare 75.0 kWSG-234-R



SG234R-Std. 0.400 85.87 127.17SpareSG-234-R

P-3801BM 0.400 1 87.00 92.20 411.40Spare 330.0 kWSG-235

SG235-Mtr Conti. 0.400 86.57 779.58ContinuousSG-235

SG235-Std. 0.400 86.62 455.53SpareSG-235

P-1108BM 0.400 1 86.00 93.00 93.77Spare 75.0 kWSG-331

P-3104-A-M 0.400 1 86.00 93.00 9.38Continuous 7.5 kWSG-331

SG331-Conti. 0.400 87.73 66.95ContinuousSG-331

SG331-Future 0.400 79.96 305.54ContinuousSG-331


SG331-Std. 0.400 83.20 407.57SpareSG-331

P-5201AM 6.600 1 89.00 96.80 2797.38Spare 2410.0 kWSG-421-L

P-5201CM 6.600 1 89.00 96.80 2797.38Continuous 2410.0 kWSG-421-L

ME-5201-X 6.600 80.00 470.00ContinuousSG-421-R

P-5201BM 6.600 1 89.00 96.80 2797.38Continuous 2410.0 kWSG-421-R

P-5201DM 6.600 1 89.00 96.80 2797.38Continuous 2410.0 kWSG-421-R




SG431L-Std. 0.400 80.00 131.76SpareSG-431-L




SG431R-Std. 0.400 83.71 15.96SpareSG-431-R

SG531-Conti. 0.400 86.39 28.20ContinuousSG-531

SG531-Future 0.400 80.00 66.11ContinuousSG-531

SG531-Intr. 0.400 80.00 100.03IntermittentSG-531


SG531-Std. 0.400 81.72 89.16SpareSG-531

032


Location: QATAR


Engineer:

Filename: Arc Flash

Page: 1

Date: 15-09-2019

Revision: Base



19.0.0C

Motor Nameplate Schedule

Motor ID Connected Bus Feeder Tag Phi # Status Rating SF kV RPM FLA % PF % EFF

Nameplate

Unit

96.10 83.00 65.38 3000 0.400 1.00 37.0Spare 13ESG-031C-2201-P-B-M kW

96.10 87.40 189.03 3000 0.400 1.00 110.0Continuous 13ESG-031P-2201AM kW

96.10 87.40 189.03 3000 0.400 1.00 110.0Spare 13ESG-031P-2201BM kW

96.10 85.00 0.71 1500 0.400 1.00 0.4Continuous 33ESG-031P-2204-M kW

92.00 93.00 126.52 3000 0.400 1.00 75.0Continuous 13ESG-131P-2301AM kW

92.00 93.00 126.52 3000 0.400 1.00 75.0Spare 13ESG-131P-2301BM kW

80.60 85.00 3.57 1500 0.400 1.00 1.5Spare 13ESG-231B-3201-FA-P-A/B-M kW

91.10 85.00 28.63 1500 0.400 1.00 15.0Continuous 13ESG-231C-1301-P-A-M kW

84.00 88.00 7.81 3000 0.400 1.00 4.0Spare 13ESG-231C-3601-A-P-B-M kW

89.70 85.00 21.83 1500 0.400 1.00 11.0Continuous 13ESG-231FA-1201-P-A-M kW

93.40 87.00 79.93 1500 0.400 1.00 45.0Spare 13ESG-231ME-1102-PM kW

83.40 85.00 4.89 1500 0.400 1.00 2.2Spare 13ESG-231P-3201-A-P-B-M kW

74.00 84.00 0.46 1500 0.400 1.00 0.2Continuous 23ESG-231P-3205-A/B-M kW

93.00 89.00 156.95 3000 0.400 1.00 90.0Continuous 23ESG-231P-3405-A/B-M kW

93.00 89.00 156.95 3000 0.400 1.00 90.0Spare 13ESG-231P-3405-C-M kW

91.00 93.00 94.72 1500 0.400 1.00 55.0Spare 13ESG-331P-3112-B-M kW

94.60 92.00 87.45 1500 6.600 1.00 870.0Continuous 13MC-022-LC-2101AM kW

95.00 87.00 50.80 1500 6.600 1.00 480.0Continuous 13MC-022-LP-2101AM kW

94.00 88.00 21.15 1500 6.600 1.00 200.0Spare 13MC-022-LP-2102AM kW

94.00 88.00 19.56 1500 6.600 1.00 185.0Spare 13MC-022-LP-2303AM kW

94.00 88.00 19.56 1500 6.600 1.00 185.0Spare 13MC-022-LP-2305AM kW


94.60 91.00 88.41 1500 6.600 1.00 870.0Spare 13MC-022-RC-2101BM kW

95.00 87.00 50.80 1500 6.600 1.00 480.0Spare 13MC-022-RP-2101BM kW

94.00 88.00 21.15 1500 6.600 1.00 200.0Continuous 13MC-022-RP-2102BM kW



94.10 90.00 23.14 1500 6.600 1.00 224.0Spare 13MC-022-RP-2701BM kW

95.70 87.10 46.91 1500 6.600 1.00 447.0Spare 13MC-222-LB-3201-FAM kW

95.70 87.10 46.91 1500 6.600 1.00 447.0Spare 13MC-222-LB-3202-FAM kW

95.10 87.40 47.04 1500 6.600 1.00 447.0Spare 13MC-222-LB-3203-FAM kW


95.20 93.00 31.12 3000 6.600 1.00 315.0Spare 13MC-222-LP-1101BM kW

94.50 87.00 22.34 1500 6.600 1.00 210.0Continuous 13MC-222-LP-1118-A-M kW

94.70 82.00 68.72 1500 6.600 1.00 610.0Spare 13MC-222-LP-1453A-M kW

95.50 91.00 94.62 1500 6.600 1.00 940.0Spare 13MC-222-LP-3105AM kW

96.50 88.00 46.97 1500 6.600 1.00 456.0Spare 13MC-222-LP-3109AM kW

85.00 80.00 20.58 1500 6.600 1.00 160.0Spare 13MC-222-LP-3XXX-A-M (Future) kW

93.35 92.19 48.99 1500 6.600 1.00 482.0Continuous 13MC-222-RC-3601BM kW

95.30 87.00 72.80 1500 6.600 1.00 690.0Continuous 13MC-222-RFA-1401-M kW

88.75 88.00 35.28 1500 6.600 1.00 315.0Spare 13MC-222-RP-1101CM kW

94.50 87.00 22.34 1500 6.600 1.00 210.0Continuous 13MC-222-RP-1118-B-M kW

94.50 87.00 22.34 1500 6.600 1.00 210.0Spare 13MC-222-RP-1118-C-M kW

033


Location: QATAR


Engineer:

Filename: Arc Flash

Page: 2

Date: 15-09-2019

Revision: Base



19.0.0C



Nameplate

Unit

94.70 85.00 66.29 1500 6.600 1.00 610.0Continuous 13MC-222-RP-1453B-M kW

95.50 91.00 94.62 1500 6.600 1.00 940.0Spare 13MC-222-RP-3105BM kW

94.50 89.00 38.48 3000 6.600 1.00 370.0Spare 13MC-222-RP-3202CM kW

85.00 80.00 20.58 1500 6.600 1.00 160.0Continuous 13MC-222-RP-3XXX-B-M (Future) kW

95.40 89.00 154.54 3000 6.600 1.00 1500.0Continuous 13SG-021-RX-2701-CM kW

92.30 85.00 55.19 1500 0.400 1.00 30.0Continuous 13SG-032-LE-2111-AM kW

90.00 86.00 34.50 1500 0.400 1.00 18.5Continuous 23SG-032-LE-2205-A/CM kW

92.30 85.00 55.19 1500 0.400 1.00 30.0Continuous 23SG-032-LE-2240-A/CM kW

95.40 89.00 190.40 3000 0.400 1.00 112.0Continuous 13SG-032-LME-2101-CM kW

76.80 83.00 3.40 1500 0.400 1.00 1.5Continuous 13SG-032-LME-2101-P-AM kW

92.30 85.00 55.19 1500 0.400 1.00 30.0Continuous 13SG-032-RE-2111-BM kW

90.00 86.00 34.50 1500 0.400 1.00 18.5Continuous 23SG-032-RE-2205-B/DM kW

92.30 85.00 55.19 1500 0.400 1.00 30.0Continuous 23SG-032-RE-2240-B/DM kW

94.50 92.00 240.73 3000 0.400 1.00 145.0Continuous 13SG-032-RFA-2602M kW

92.70 90.00 60.55 3000 0.400 1.00 35.0Continuous 13SG-032-RFA-2603-M kW

94.50 87.40 182.62 3000 0.400 1.00 110.0Spare 13SG-032-RP-2240-B-M kW

96.10 85.00 0.71 1500 0.400 1.00 0.4Continuous 13SG-131-LP-2301-A-P-M kW

94.00 89.00 258.79 3000 0.400 1.00 150.0Continuous 13SG-131-LP-2451AM kW

96.10 85.00 0.71 1500 0.400 1.00 0.4Spare 13SG-131-RP-2301-B-P-M kW

94.00 89.00 258.79 3000 0.400 1.00 150.0Spare 13SG-131-RP-2451BM kW


94.00 89.00 258.79 3000 0.400 1.00 150.0Spare 13SG-132-RP-2302BM kW

93.00 83.00 69.19 1500 0.400 1.00 37.0Continuous 13SG-133-LE-2105AM kW

88.30 86.00 20.91 1500 0.400 1.00 11.0Continuous 13SG-133-LE-2312-AM kW

93.00 83.00 69.19 1500 0.400 1.00 37.0Continuous 13SG-133-RE-2105BM kW


96.60 91.00 408.30 3000 6.600 1.00 4103.0Continuous 13SG-221-LC-1301M kW

96.20 92.00 92.12 1500 6.600 1.00 932.0Continuous 13SG-221-LC-3501M kW

95.90 86.00 118.79 1500 6.600 1.00 1120.0Continuous 13SG-221-LFA-1202M kW

95.60 89.00 102.81 1500 6.600 1.00 1000.0Spare 13SG-221-LP-3106AM kW

92.00 89.00 160.25 1500 6.600 1.00 1500.0Continuous 13SG-221-LX-1103-C-A-M kW

92.00 89.00 160.25 1500 6.600 1.00 1500.0Continuous 13SG-221-LX-1103-C-B-M kW

95.60 89.00 102.81 1500 6.600 1.00 1000.0Spare 13SG-221-RP-3106BM kW

96.00 91.00 190.26 3000 6.600 1.00 1900.0Spare 13SG-221-RP-3201BM kW

93.15 89.00 158.28 1500 6.600 1.00 1500.0Continuous 13SG-221-RX-1104-C-A-M kW

93.70 89.00 157.35 1500 6.600 1.00 1500.0Continuous 13SG-221-RX-1104-C-B-M kW

92.30 85.00 55.19 1500 0.400 1.00 30.0Continuous 43SG-231-LE-1118-ACEGM kW


80.00 81.00 10.25 3000 0.400 1.00 4.6Continuous 13SG-231-LX-3502-G-P-A-M kW

86.20 89.00 7.53 1500 0.400 1.00 4.0Spare 13SG-231-RC-3501-P-B-M kW

92.30 85.00 55.19 1500 0.400 1.00 30.0Continuous 43SG-231-RE-1118-BDFHM kW

93.50 86.00 161.55 1500 0.400 1.00 90.0Spare 13SG-231-RP-1001BM kW

89.00 81.00 9.21 3000 0.400 1.00 4.6Spare 13SG-231-RX-3502-G-P-B-M kW

034


Location: QATAR


Engineer:

Filename: Arc Flash

Page: 3

Date: 15-09-2019

Revision: Base



19.0.0C



Nameplate

Unit

93.00 83.00 69.19 1500 0.400 1.00 37.0Continuous 93SG-232-LE-1123-LM1 kW

93.00 83.00 69.19 1500 0.400 1.00 37.0Continuous 93SG-232-LE-1123-LM2 kW


93.00 83.00 69.19 1500 0.400 1.00 37.0Continuous 83SG-232-RE-1123-RM1 kW

93.00 83.00 69.19 1500 0.400 1.00 37.0Continuous 93SG-232-RE-1123RM2 kW

92.00 92.00 248.98 3000 0.400 1.00 146.0Continuous 13SG-233-L70-K001A (Future) kW

92.00 85.00 55.37 1500 0.400 1.00 30.0Continuous 13SG-233-LP-1110-A-M kW

92.00 85.00 55.37 1500 0.400 1.00 30.0Continuous 13SG-233-LP-1111-A-M kW

92.00 92.00 248.98 3000 0.400 1.00 146.0Spare 13SG-233-R70-K001B (Future) kW

92.00 85.00 55.37 1500 0.400 1.00 30.0Spare 13SG-233-RP-1110-B-M kW

92.00 85.00 55.37 1500 0.400 1.00 30.0Spare 13SG-233-RP-1111-B-M kW


93.00 86.00 135.35 1500 0.400 1.00 75.0Spare 13SG-234-RP-3203BM kW

92.20 87.00 602.81 1500 0.400 1.00 330.0Spare 13SG-235P-3801BM kW

93.00 86.00 135.35 1500 0.400 1.00 75.0Spare 13SG-331P-1108BM kW

93.00 86.00 13.54 1500 0.400 1.00 7.5Continuous 13SG-331P-3104-A-M kW

96.80 89.00 244.71 750 6.600 1.00 2410.0Spare 13SG-421-LP-5201AM kW

96.80 89.00 244.71 750 6.600 1.00 2410.0Continuous 13SG-421-LP-5201CM kW

96.80 89.00 244.71 750 6.600 1.00 2410.0Continuous 13SG-421-RP-5201BM kW

96.80 89.00 244.71 750 6.600 1.00 2410.0Continuous 13SG-421-RP-5201DM kW

035

6. SHORT CIRCUIT ANALYSIS 6.1 General Procedure

An electrical system short-circuits analysis is used for the following:

a) To compare the calculated maximum fault current with the interrupting ratings of over current Protective devices such as fuses and circuit breakers b) To investigate applicable, short-circuit series ratings and the protection of electrical equipment

by Current- limiting devices. c) To verify the adequacy of other equipment (such as transformers, switches, equipment

bussing) to Withstand the effects of the calculated maximum fault current levels. d) To assist in the selection and/or determination of settings for relays, fuses and circuit breakers.

The engineer performed the short circuit study on the existing equipment. The engineer calculated the fault current using the ETAP computer program & compared the fault values to the equipment short circuit rating.

This analysis was made utilizing a digital computer programmed to calculate the maximum available three-phase, RMS symmetrical and asymmetrical short-circuit amperes at each piece of equipment in the system. The calculation procedures are based on recommendations included in ANSI standards

The computer program simulates a bolted three-phase fault at each point of consideration in the system and calculates the maximum available short-circuit current at that point without any reduction due to current-limiting protective devices which may be present. (However, the effects of current limiting devices are considered when determining the adequacy of the equipment.) The calculated short-circuit values are RMS symmetrical amperes and are comparable with the RMS symmetrical short-circuit ratings of electrical equipment. In addition, when the X/R ratio associated with this calculated RMS symmetrical current is greater than the tested breaker X/R ratio, the calculated value is increased by an appropriate multiplying factor.

The computer program was also used to calculate single line-to-ground fault currents. Actual distribution system zero sequence impedance (Z0) values are difficult to calculate. The zero sequence impedances utilized by the computer program are based on simple, conservative linear relationships with the corresponding positive sequence impedance (Z1).

Electrical distribution equipment must be able to withstand and/or interrupt the most severe fault duty that it may be subjected to at its location in the system. In general, circuit breakers to have a rating sufficient for interrupting the maximum available fault current present at their line side terminals. For locations where calculated fault currents exceed the ratings of equipment, recommendations for remedies are provided. The included one-line diagrams are a simplified version of the engineer's drawings, showing only those parts of the electrical system under consideration. The various circuit locations on the diagrams have been labeled with bus identification numbers so input data could be supplied to the computer and the computer output could be readily interpreted.

036

6.2 Data Used in the Calculations.

6.2.1 Power Company Data

M/s QAFAC provided the basic information of Plant SLD (Single Line Diagram) and some information which are related to the switch gear panels & distribution Boards. Utility Supply Configuration:

Normally, QAFAC is getting the supply from the 33KV distribution stations which are under the KAHRAMAA.

A] Source feeding from 33KV Substation.

The system was modeled for worst-case maximum & minimum fault currents. In order to model the system for worst-case Incident energy in the event of Arc Flash incident; maximum & minimum values of bolted fault current are calculated for various system operating conditions as mentioned below. 6.2.2 Cable Data

The "FEEDER DATA" computer printout lists the cable data used for each circuit segment. Included are cable lengths, number per phase, size, conductor material, cable insulation type, conduit material values. Also, circuit segment cable lengths, number per phase, and size are recorded on the one-line diagrams. 6.2.3 Transformer Data

Transformer nameplate provided the Make, type, Rating & the %Z values.

6.2.4 Motor Contribution to Short-Circuit Current All connected motors were assumed to be running at the time of the fault. For calculation of low voltage fault duty, the contribution from all induction motors in the system was considered. For medium and high-voltage buses, contribution for induction motors less than 50 hp are neglected. Motors fed by adjustable-speed drives are also not considered, since they generally do not contribute to fault current. To increase the accuracy in the calculations motors greater than 10 kW is considered for the low Voltage Short circuit calculations. 6.3 Short Circuit Analysis Results Short Circuit Fault levels are determined with various

ARC FLASH RISK ASSESSMENT REPORT · IEC/IEEE Std. 142-1991 (IEEE Green Book—see Section 1.6.4 and...

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Transcript of ARC FLASH RISK ASSESSMENT REPORT · IEC/IEEE Std. 142-1991 (IEEE Green Book—see Section 1.6.4 and...