SECTION 16220 Motors and Generators, Rev 0

7/30/2019 SECTION 16220 Motors and Generators, Rev 0

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SECTION 16220:GUIDELINE SPECIFICATION FORMOTORS AND GENERA TORS

0 31/01/06 I IssuedforUse c=,. ~REV DATE DESCRIPTION PREPARED BY

KINGDOMOFSAUDIARABIARoyalCommissionorJubail&Yanbu

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SECTION 16220MOTORS AND GENERATORS

Rev 0 i Contract No:

TABLE OF CONTENTS

Item No Title Page No

PART 1 GENERAL............................................................................................................11.01 DESCRIPTION OF WORK ..................................................................................11.02 SECTION INCLUDES..........................................................................................11.03 RELATED SECTIONS .........................................................................................11.04 REFERENCES..................................................................................................... 11.05 DEFINITIONS....................................................................................................... 31.06 SUBMITTALS....................................................................................................... 41.07 QUALITY CONTROL...........................................................................................51.08 HEALTH AND SAFETY CONSIDERATIONS...................................................... 51.09 FACTORY TESTING ...........................................................................................61.10 SERVICE CONDITION ........................................................................................61.11 DELIVERY, HANDLING AND STORAGE ...........................................................7

PART 2 PRODUCTS .........................................................................................................82.01 GENERAL............................................................................................................82.02 PACKAGED ENGINE GENERATOR SETS........................................................82.03 DIESEL ENGINE................................................................................................ 102.04 GENERATOR..................................................................................................... 152.05 MOTORS............................................................................................................ 19

PART 3 EXECUTION ......................................................................................................263.01 GENERAL..........................................................................................................263.02 INSTALLATIONS ...............................................................................................263.03 TESTING AND COMMISSIONING....................................................................29


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Rev 0 1 of 32 Contract No:

PART 1 GENERAL

1.01 DESCRIPTION OF WORK

A. This Section specifies minimum technical requirements for designing, manufacturing,

supplying, installing, storing, handling, testing and commissioning of Motors, andEmergency and Standby Generators as specified and shown on the ContractDrawings/Documents.

1.02 SECTION INCLUDES

A. Packaged Engine Generator Sets

B. Diesel Engine

C. Generator

D. Motors

1.03 RELATED SECTIONS

A. Section 01320 Construction Progress Documentation

B. Section 01330 Submittal Procedures

C. Section 01410 Regulatory Requirements

D. Section 01450 Quality Control

E. Section 01650 Product Delivery Requirements

F. Section 01660 Product Storage and Handling Requirements

G. Section 02315 Excavation and Fill

H. Section 03310 Structural Concrete

I. Section 15190 Fuel Piping

J. Section 16055 General Provision of Low Voltage Electrical Works

K. Section 16060 Grounding and Bonding

L. Section 16075 Electrical Identifications

1.04 REFERENCES

A. The referred codes and standards are intended to provide an acceptable level ofquality for materials and products. In case of conflict between these standards andthe text of this Specification, the Specification text shall govern.


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B. The latest revision of the referred codes and standards shall be used whereverapplicable. In case of conflict, the Contractor shall propose equipment conforming toone group of codes and standards.

C. ANSI American National Standards Institute

1. ANSI C50.13 Requirements for Rotating Electrical MachineryCylindrical Rotors Synchronous Generators

D. ASTM American Society of Testing Materials

1. ASTM A53M Standard Specification for Pipe, Steel, Black, andHot-Dipped. Zinc Coated Welded and Seamless

2. ASTM B88M Standard Specification for Seamless Copper WaterTube [Metric]

E. IEC International Electrotechnical Commission

1. IEC 60034 Rotating Electrical Machines

2. IEC 60050 International Electrotechnical Vocabulary

3. IEC 60072 Dimension and Output Series for Rotating ElectricMachine

4. IEC 60079 Electrical Apparatus for Explosive Gas Atmospheres

5. IEC 60529 Classification of Degree of Protection Provided byEnclosure (IP Code)

F. IEEE Institute of Electrical and Electronic Engineers

1. IEEE 43 Recommended Practice for Testing InsulationResistance of Rotating Machinery

2. IEEE 112 Standard Test Procedure for Polyphase InductionMotors and Generators

3. IEEE 114 Standard Test Procedure for Single Phase InductionMotors

4. IEEE 115 Standard Test Procedure for Synchronous Machines

5. IEEE C37.96 Guide for AC Motor Protection

G. ISO International Standard Organization

1. ISO 3046 Reciprocating Internal Combustion Engines

2. ISO 8528 Reciprocating Internal Combustion Engine DrivenAlternating Current Generating Sets


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H. NEMA National Electrical Manufacturers Association

1. NEMA 250 Enclosure for Electrical Equipment

2. NEMA MG1 Motors and Generators

3. NEMA MG2 Safety Standard for Construction and Guide forSelection, Installation, and Use of Electric Motorsand Generators

I. NFPA National Fire Protection Association

1. NFPA 70 National Electric Code

2. NFPA 99 Standard for Health Care Facilities

3. NFPA 110 Emergency and Standby Power System

J. UL Underwriters Laboratories Inc.

1. UL 674 Electric Motors and Generators for Use in Division 1Hazardous Locations

1.05 DEFINITIONS

A. code letter: A letter which appears on nameplates of alternating current (ac) motorsto show their locked rotor kilovolt-amperes per horsepower at rated voltage andfrequency.

B. duty:A continuous or short-time rating of a machine.

C. frequency: The number of cycles per second. Alternating current frequency isexpressed in cycles per second, termed as Hertz (Hz).

D. generator: A machine that is used to convert mechanical power into an electricpower.

E. insulation class: A letter or number that designates the temperature rating of aninsulation material or system with respect to thermal endurance.

F. motor:A rotating machine that converts electrical power into mechanical power.

G. poles: The magnetic poles set up inside the machine by the placement and

connection of the windings.

H. power factor: The ratio of watts to volt-amperes of an ac electric circuit.

I. rotor: The rotating element of any motor or generator.

J. rated output: Motor rated output is mechanical power available at the shaftexpressed in watts (w).


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K. slip: The difference between the speed of the rotating magnetic field (which isalways synchronous) and the rotor in a non-synchronous induction motor and isexpressed as a percentage of a synchronous speed. Slip generally increases with anincrease in torque.

L. speed factor: A factor derived by multiplying internal diameter of a bearing inmillimeter (mm) by motor speed in revolution per minute (rpm).

M. stator: The stationary part of a rotating machine. Commonly used to describe thestationary part of an ac machine that contains the power windings.

N. synchronous speed: A speed of rotating machine element of an ac motor thatmatches the speed of the rotating magnetic field created by the armature winding.

O. thermistor: A resistive device used for temperature sensing that is composed ofmetal oxides formed into a bead and encapsulated in epoxy or glass.

1.06 SUBMITTALS

A. The Contractor shall submit to the Royal Commission, under the provisions ofSECTION 01330, the following items for review and approval before commencingWork:

1. Shop Drawings

a) A complete drawing list/index identifying all drawings in the ShopDrawing package.

b) Legend, symbols and specialized terminology used on the drawings.

c) Layouts showing concrete pad dimensions, conduit entrance andavailable space, electrical ratings, nameplate nomenclature.

d) Single line diagram.

e) Schematic diagram.

f) Control schematics.

g) Interconnection wiring diagram.

h) Front, side and rear elevations showing location of all components.

i) Nameplate Schedules.

2. Data Sheets and Specifications.

3. Maintenance Data and Operating Instructions

a) Manufacturers catalogs giving description of the equipment and itscomponents.


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b) Manufacturers operating and maintenance instructions manuals.

c) Storage and handling Instructions.

d) Installation instructions.

e) Part list.

f) Illustrations and diagram of components.

g) Recommended list of spare parts along with price list.

h) Factory test report.

4. Quality Program as specified in SECTION 01450.

B. The Contractor shall submit Field Test Report after completion of testing andcommissioning.

1.07 QUALITY CONTROL

A. The Contractor shall be responsible for the quality of work and shall develop andpropose programs and methods of construction and testing to achieve the specifiedquality to the approval of the Royal Commission in accordance withSECTION 01450.

1.08 HEALTH AND SAFETY CONSIDERATIONS

A. All works undertaken in relation to this Specification are to be completed in full

accordance with the respective health and safety requirements established by thefollowing:

1. Kingdom of Saudi Arabia

a) Legislation, Regulation, Standards and Codes.

2. Royal Commission Regulations

a) Standards, Contractual Conditions, and Health and Safety Systems.

3. Contractor

a) Health and Safety Standards and Systems as accepted by the RoyalCommission.

B. In the absence of any of the above, best accepted industry practice shall beemployed throughout.


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1.09 FACTORY TESTING

A. All equipment/material shall be tested at factory in accordance with latest applicablecodes and standards. All type tests as per applicable codes and standards shall beperformed on first unit of every new design. The Contractor shall notify the Royal

Commission in writing not less than 30 days prior to the scheduled starting date ofthe factory tests.

B. The Royal Commission reserves the right of deputing their representative forwitnessing the factory test.

C. Upon completion of factory test and before shipment of the equipment/material, theContractor shall submit 5 certified copies of test reports not later than 10 days aftercompletion of all factory test for review/approval by the Royal Commission.

1.10 SERVICE CONDITION

A. Motors and Diesel Generators installed indoor shall be suitable for continuousoperation under the following service conditions:

1. Ambient Air Temperature

a) A maximum of 40C.

b) A minimum of 0C.

c) Average temperature measured over a period of 1 month is 35C.

2. Average Value of Relative Humidity

a) For a period of 24 hours does not exceed 95%.

b) For a period of 1 month does not exceed 90%.

c) Relative humidity may be temporarily 100%.

B. Motors and Diesel Generators installed outdoors shall be suitable for continuousoperation under the following service conditions:

1. Ambient Air Temperature

a) A maximum of 50C.

b) A minimum of 0C.

c) Average temperature measured over a period of 1 month is 45C.

2. Altitude shall be less than 1000 m, unless a higher altitude is specified in theContract Drawings/Documents.

3. Average Value of Relative Humidity


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a) For a period of 24 hours does not exceed 95%.

b) For a period of 1 month does not exceed 90%.

c) Relative humidity may be temporarily 100%.

C. Motors and Generators installed in hazardous locations shall comply with therelevant requirements of Article 500 of NEC.

1.11 DELIVERY, HANDLING AND STORAGE

A. The Contractor shall deliver, handle and store equipment and material units inaccordance with SECTIONS 01650 and 01660, as well as the followingrequirements:

1. Provide marking on each item in accordance with the referenced standards.Ship each unit securely wrapped, crated and wrapped or packaged and

labeled for safe handling in shipment and to avoid damage or distortion.

2. On arrival at site, the equipment/material shall be checked for completenessand physical damage.

3. Store equipment in secure and dry storage facility as recommended bymanufacturer.

4. Protect all units from physical damage from work of other trades.

5. The Contractor shall be responsible for any damage occurring duringtransportation, handling and storage of the equipment.


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PART 2 PRODUCTS

2.01 GENERAL

A. All goods and products covered by these Specifications shall be procured, when

available, from an in-Kingdom manufacturer. Procurement of all goods and productsmanufactured out-of-Kingdom must be approved by the Royal Commission.

B. All parts and materials shall be new, good quality, and shall be selected by theContractor and the manufacturer to perform as specified herein.

C. The Equipment Supplied:

1. Shall fully confirm to or exceed the minimum requirements specified in thisSpecification.

2. Shall be a product of an original manufacturer.

3. Shall be factory assembled and tested to the extent possible so as to minimizefield erection.

D. Items or components of the equipment not specifically covered herein shall be inaccordance with latest editions of the referenced codes and standards.

E. The components of assembled unit shall be UL listed or approved by a testinglaboratory acceptable to the Royal Commission.

F. Reliability and maximum service continuity shall be the fundamental considerationsof engineering, design, operational functions and material used in the design ofcomponents and manufacturing.

G. The Contractor shall have full responsibility for testing and inspection to ensure thatthe equipment provided shall comply with all regulatory codes, standards, andregulations applicable to the specified service and to the requirements of thisSpecification.

2.02 PACKAGED ENGINE GENERATOR SETS

A. The Contractor shall supply factory assembled, completely wired except for the fieldcomponents, fully automatic diesel engine-generator system as specified in theContract Drawings/Documents and in accordance with related standards specifiedin par. 1.04.

B. The unit shall be skid-mounted or mobile, package type consisting of a water-cooleddiesel engine, coupled directly or geared to an alternating current generator. Themobile generator shall either be provided with wheel or trolley mounted. The unitshall be furnished complete with all auxiliaries, including starting system, fuel storageand supply system, cooling system, exhaust system, switching equipment, controls,protections, alarms, piping and accessories.

C. Steel Skid for Packaged Set


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1. The engine generator set shall be integrally mounted on steel skids fabricatedfrom channels or I-beams with welded steel cross bracing.

2. The skids shall be of sufficient size and rigidity to support the assembled unit,to permit moving of the assembly without the addition of wheels or rollers and

to maintain alignment between the engine and generator during all skidding,transporting, and operating conditions.

3. Holes at the bottom flange of the skid shall be provided for proper alignmentwith anchor bolts.

4. Units rated 200 kW and below shall have rubber vibration dampers installedbetween the engine-generator and the skid.

5. Units above 200 kW shall be supplied with spring type vibration damperswhich shall be installed between the skid and the foundation.

D. The Diesel Generator set shall be aligned properly after proper coordination of

various components required for such alignment.

E. Couplings, shafts and other moving parts shall be enclosed and guarded. The guardshall be metal, ruggedly constructed, rigidly fastened and readily removable forconvenient servicing of the equipment without disassembling any pipes and fittings.

F. Technical Characteristic

1. Each unit shall have output rating and other characteristics as specified below:

a) Continuous Output Rating: As specified on the Contract Drawings

b) Rated Voltage: As specified on the Contract Drawings

c) Frequency: 60 Hz

d) No. of Phases: 3-phase, 4-wire

e) Power Factor (pf): 0.8

f) Engine Speed: Not to exceed 1800 rpm

g) Elevation: As specified on the Contract Drawings

2. The unit shall be capable of operating continuously for 2 consecutive hourswithin any 24-hour period of operation at 110% of its specified rating withoutdamage.

3. The diesel generator set shall be capable of single-step load pick-up of 50%nameplate kW rating at 0.8 pf, and shall be capable of assuming 100% loadwithin 10 seconds of startup.


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2.03 DIESEL ENGINE

A. Diesel Engine Requirements

1. Diesel engine shall be 2 or 4 cycle, water-cooled, cold starting type and shall

be of the size required to produce the power required by the generator atsynchronous speeds after appropriate de-rating adjustments have been madeto compensate for conditions cited above and shall be rated for full load of thegenerator for continuous 24-hour duty.

2. Forced feed lubrication system, if required, shall be provided by engine drivenpump at main crank shaft, camshaft bearings and at camshaft chain and geardrives.

3. The engine/flywheel shall be of a proper design for safe operation at speedsbetween 10% of synchronous speed.

4. The engine shall drive the generator through a flexible coupling of the torque

limiting type to minimize de-synchronization. The coupling shall be selected topermit the engine generator assembly to operate free from critical or torsionalvibration within a range of 20% of the normal operating speed.

5. Cylinder heads, exhaust valves, piston and piston rings shall be sufficientlycooled to prevent overheating at ambient temperatures specified inpar. 1.10.

6. There shall be an over-speed shut down with manual reset, overriding thegovernor at 115% of the rated speed.

7. The engine supplier shall consider the long periods, the engines will stand idle,and ensure that engine can meet full-rated load immediately after attaining thefull-rated speed after a cold start.

B. Starting of the Engine

1. The engine shall be provided with a complete automatic electric startingsystem, consisting of starting motor, battery charger, voltage regulator, heavyduty diesel cranking type batteries and associated accessories and wiring toprovide a complete starting system.

2. The starting battery (12 or 24 V as specified on the Contract Drawings), shallhave sufficient capacity to crank the engine for temperatures specified inpar. 1.10 for a minimum of 5 consecutive start trials. The battery charger shallbe adequate to fully recharge the depleted battery within 24 hours.

3. Battery console consisting of floor standing cabinet, battery charger andbattery cells of nickel cadmium or lead-acid type, for 12 or 24 V DC operation.Charger shall be constant potential, line compensated type, rated volt input,and shall include a DC voltmeter and ammeter.

4. The motor shall be locked out and an audible alarm shall be initiated if theengine fails to start after fifth attempt.

5. Extra large engines could have other means of starting, such as compressed


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air. In such cases, the manufacturer shall completely specify the startingsystem.

C. Engine Cooling System

1. The engine cooling system shall consist of liquid cooled closed looparrangement with a unit mounted or remote radiator as specified on theContract Drawing.

2. Cooling capacity of the system shall not be less than the cooling requirementsof the engine-generator set and its lubricating oil while operating continuouslyat 110% of its specified rating. The system shall have sufficient capacity tomaintain stable operating temperature under the worst site condition.

3. The engine driven pump used for circulating the coolant shall be centrifugaltype.

4. Appropriate pressure relief valves shall be provided to prevent excessive

pressure increase after the engine stops.

5. Forced air fan driven by engine shaft and controlled by thermostat shall beprovided. The fan shall operate if the temperature of coolant exceeds the valueas determined by manufacturer.

6. A thermostat set shall be provided to initiate coolant circulation at a specifiedtemperature with a radiator by-pass to control the circulation. The radiator andfan shall be protected by a heavy duty metal guard.

7. The coolant shall be extended life antifreeze solution of 50% ethylene and50% soft water. Corrosion inhibitor additive as recommended by themanufacturer shall be added to the coolant to prevent corrosion.

8. Coolant hoses shall be flexible as per manufacturer's recommendation.

9. Self-contained thermostatic-control valve shall be provided to modulate coolantflow to maintain optimum constant coolant temperature as recommended bythe engine manufacturer.

10. Drain pipes for the radiator and for the engine block shall be provided at lowpoints in a system.

11. An engine mounted, thermostatically controlled immersion type engine coolantheater shall be provided to ensure a minimum coolant temperature of 49C.Heater shall be suitable for operation on voltage rating as specified on theContract Drawings.

12. An expansion tank shall be located at the highest point in the system and shallhave a minimum volume of 10% of the entire cooling system. The tank shallbe supplied with a visual gage so that the coolant level can be checked withoutremoving the radiator cap.

13. If certain installations require remote radiator, additional electric motor drivenfan and starter, with protective and interlock controls shall be provided toprevent engine operation without proper cooling system.


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D. Governor

1. The engine shall be equipped with a hydraulic or electronic type governormeeting steady state and transient response requirements of the system. Thegovernor shall provide the following speed regulations:

a) At no load and rated rpm, the periodic variation in speed shall notexceed 1% above or below the mean rpm.

b) For any constant load between 25% and full load of generator rating,the governor shall maintain the frequency constant between 0.5%.

c) The change in the speed when the generator load is gradually reducedfrom 100% rated capacity to no-load, when initially operated at ratedrpm, shall not exceed 3%. For certain installations, such astelecommunication facilities, governor speed regulation shall be within 0.25%.

d) While engine is running, it shall be possible to adjust the speedmanually.

E. Engine Air Intake

1. Engine intake replaceable air filters shall be a combined heavy duty pre-cleaner and dry filter arrangement with a local differential pressure indicator toascertain the dirty condition of the filter. The filter shall be suitable for the worstsite conditions.

F. Exhaust System

1. The exhaust system shall be designed in such a way that the pressure drop inthe complete exhaust system shall be small enough for satisfactory operationof the engine-generator set while it is delivering 110% of its specified rating.

2. Exhaust pipe size from the engine to the muffler shall be as recommended bythe engine manufacturer. Pipe size from muffler to air discharge shall be2-pipe sizes larger than engine exhaust pipe.

3. Connections at the engine exhaust outlet shall be made with a flexible exhaustpipe. Provide bolted type pipe flanges welded to each end of the flexiblesection.

4. The muffler shall be designed to keep noise level below allowable limit.Condensate drain at muffler shall be made with Schedule 40 black steel pipethrough a petcock.

5. Exhaust piping and muffler shall be adequately supported, supplied withflexible joints to absorb thermal expansion stresses and insulated with 50 mmthick glass fiber covered with an aluminum jacket of minimum thickness0.8 mm. The jacket is to be held in place by 0.38 mm thick and 15 mm widealuminum bands.


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G. Fuel System

1. The fuel system shall be as shown on the Contract Drawings and shallincorporate all the necessary pumps, valves, filters, piping, fittings, Day andBulk Storage tanks to provide a clean reliable supply of fuel to the engine.

2. The engine fuel pump shall be an engine driven, positive displacement pumpcapable of supplying an adequate amount of fuel to the engine under alloperating conditions.

3. Fuel injection system shall operate satisfactorily under load and specifiedtemperature conditions and shall be provided with injector nozzles of suchdesigns as to obtain the most efficient fuel distribution.

4. Fuel filtration system shall consist of a primary fuel filter installed in the linebetween the fuel Bulk Storage tank and the engine-driven pump and asecondary replaceable fuel filter, installed integrally with engine ahead of theinjector system.

5. The construction of the secondary filter shall be such as to prevent leakagewhen the filter is subjected to the maximum pressure which the fuel pump iscapable of generating when the fuel system becomes completely obstructed.

6. Both primary and secondary filters shall be full-flow type and shall be mountedso as to prevent injury from shock and vibration throughout the normal life ofthe unit.

7. Filter elements shall be replaceable without removing the filter assembly fromthe engine. The filters shall entrap and remove water moisture asrecommended by engine manufacturer.

8. The fuel lines shall be designed to withstand pressures developed by the fuelpump under all conditions and so installed and supported as to prevent strainsand chafing from vibration.

9. A schematic flow diagram shall be provided showing the entire fuel systemincluding the arrangements and location of the valves.

10. Day Tank

a) The capacity of the day tank shall be sufficient to run the engine for12 hours at full load and shall not be less than:

1) 190 L (50 gallons) for generator sets specified from 50 to 200 kW.

2) 284 L (75 gallons) for generator sets specified from 201 to

300 kW.

3) 379 L (100 gallons) for generator sets specified over 300 kW.

b) Fuel pipe shall be secured and connected to the tank adequately formaximum protection from fire hazards, including oil leaks. Removabledrip trays shall be provided for collection of oil leakages and its disposal.

c) The day tank shall have a vent, drain cock, shutoff cocks and gage


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glass.

d) The day tank shall have adequate sized breather vent designed toexclude dust and water from the tank.

e) A float switch shall be incorporated on the day tank to control the fuel oiltransfer pump and to actuate an alarm in the engine generator controlcubicle when the oil level in the tank drops below the level at which thetransfer pump should start to refill the tank.

1) The float switch contacts, which control the fuel oil transfer pump,shall be set to energize the pump when the liquid level in the tankreaches 33% of the total volume of the tank.

2) The float switch contacts, which actuate the low fuel oil day tankalarm device, shall be set to alarm and energize the second fueltransfer pump when the liquid level in the tank reaches 25% of thetotal volume of the tank.

H. Engine Control Panel

1. The engine control panel shall be mounted integrally with the unit and shallinclude, but not necessarily be limited to, the following components:

a) Lubricating oil pressure gage (kPa).

b) Over-speed trip device.

c) Manual push-button starter, in addition to auto cranking circuitry.

d) Water temperature gage (C).

e) Running time indicator (Hr).

f) Tachometer (rpm).

g) Signal indication or alarm lights shall indicate the following engineshutdown cases:

1) Low lubricating oil pressure.

2) High coolant temperature.

3) Low coolant flow.

4) Over-speed and over-crank.

h) Indicating lights shall remain on until "abnormal" condition is corrected,at which time, a "reset" button can be depressed to de-energize thelamps and alarm bell.

i) Any of the above conditions shall prevent re-starting the engine untilnormal start-up condition is restored. Spare contacts of the aboveconditions shall be provided for remote alarm or annunciation.


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2.04 GENERATOR

A. Generator shall be rotating armature or rotating field type with built-in exciter,automatic voltage regulation, and radio shielding, all designed and built to applicablestandards as specified in par. 1.04. Voltage regulation shall be within 5% and

frequency regulation within 3%.

B. Generator shall be capable of withstanding 20% over-speed without mechanicaldamage.

C. Generator rotation shall be dictated by the driver rotation. Phase sequence shall be1, 2, and 3 with counterclockwise phase rotation.

D. Stator

1. The stator frame shall be of fabricated steel construction with sufficientstrength and rigidity to withstand the stresses to which it may be subjected inhandling, transporting or due to short circuit or other forces while in service.

2. The stator frame shall have easily removable end enclosures and associatedventilation system.

3. The stator core shall be formed from high permeability, low loss, high gradesteel laminations. Each lamination shall be insulated from adjacent laminationto reduce eddy currents losses.

4. Spacers shall be provided at intervals along the length of the core to formradial ventilating ducts to ensure uniform temperature distribution across thestator winding.

5. The laminations shall be tightly clamped together to reduce noise and

vibrations to a minimum. Design shall prevent excessive vibration beingtransmitted to the generator foundations, pipes or associated equipment.

E. Rotor

1. Machine shall have a cylindrical pole rotor of laminated construction. Radialslots shall be machined in the rotor body to receive the field coils.

2. Generator rotor shall be statically and dynamically balanced.

F. Generator shall have Class H insulation with the temperature rise limited to Class B(80C rise by winding RTD) in a 50C ambient. Generator shall be capable ofcontinuous operation at the limiting observable temperature rise, as specified in

ANSI C50.13. Generator shall conform to the design requirements specified inNEMA MG 1.

G. Generator windings shall be suitable for wye or delta connection with both ends ofeach winding brought out to terminals, in an accessible location, for furtherconnections.

H. Machines rated 1000 kW and above shall have the stator windings equipped withtwelve 100 W platinum RTDs, 4 per phase, wired to a terminal strip in a NEMA 4X


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stainless steel or cast iron terminal box. The RTDs shall be 3-wire and shall belocated in each phase where the maximum temperature may be detected. Six of theRTDs shall be used for local temperature indication and 6 RTDs shall be used forprotective relaying.

I. For machines rated 1500 kW and above, the lower section of each bearing shall beprovided with two 100 W, platinum RTDs. The RTDs shall be located within 6 mm ofthe bearing surface. The RTDs shall be wired to a separate terminal box.

J. Bearing

1. Antifriction or sleeve type bearing shall be used as recommended by themanufacturer.

2. Antifriction Bearing

a) Antifriction bearings shall have no filling slots. Bearing race-metaltemperature shall not exceed 90C based on a maximum ambient

temperature of 50C.

b) Regreasable bearing shall be provided with 2 Nominal Pipe Thread(NPT) tapped and plugged holes, fill in and drainage plugs. The holesshall be provided with threaded Type 300 series stainless steel plugs.

c) The bearings shall be serviceable without moving or disconnecting thegenerator.

3. Sleeve Bearing

a) Sleeve type bearings shall be equipped with split, labyrinth type endseals and deflectors where the shaft passes through the housing.

b) Lip type seals shall not be used.

c) The sleeve bearing shell-metal temperature shall not exceed 90Cbased on a maximum ambient temperature of 50C.

4. Bearings shall be insulated to prevent shaft current circulation.

K. Generator Control Panel

1. Generator Control Panel shall be dead front and dust tight. The panel shall befree standing, rack mounted, wall mounted or an integral component of thegenerator unit as specified on the Contract Drawings.

2. All meters, control switches etc. shall be mounted on hinged doors and shallbe arranged and identified in accordance with good engineering practice.

3. All metering and controls shall be factory wired. Terminal blocks shall besupplied at hinge side of doors for internal and remote wiring. All wiring shallbe numbered in accordance with standard practice and in accordance withwiring diagrams.

4. The generator panelboard shall include the following components:


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a) AC Ammeter with 100 scale, 2% accuracy, and a phase selectorswitch.

b) Frequency meter with scale 55 to 65 Hz, vibration reed or dial type withintegral transducer, 100 scale, 2% accuracy.

c) Elapsed operating time meter.

d) Ground fault detector.

e) Generator winding over-temperature.

f) Automatic voltage regulator.

g) Wiring, terminal blocks, miscellaneous relays.

h) Current and potential transformers as required.

i) Energy meter.

j) Proper nameplates shall be provided for all equipment.

k) Synchroscope.

l) Voltmeter with 100 scale and 2% accuracy.

m) Power Factor Meter.

n) Ground Bus.

o) Panel illumination light and duplex receptacle.

L. Automatic Transfer and Controls

1. The automatic transfer switch shall be provided if required and shown on theContract Drawings. The transfer switch mechanism shall be quick make quickbreak type. The switch shall be electrically operated with positive mechanicalinterlock to provide load transfer.

2. Four wire automatic transfer switch shall have fully rated switched neutral.

3. The switch shall be fully enclosed in NEMA 1 enclosure for indoor installationsand NEMA 4 enclosure for outdoor installation. The switch shall be providedwith fully rated switched neutral.

4. Transfer to emergency shall occur when normal supply voltage falls below70% and to return to normal when normal supply voltage attains 90% of ratedvoltage.

5. Transfer control shall include auxiliary engine starting and stopping contacts,cranking limiter, automatic engine starting controls, 4 position selector switch(TEST-AUTO-OFF-ENGINE START) with TEST position to simulate failure ofnormal power supply.


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6. Automatic operation of generator set for 30 minutes per week without loadshall be provided, except on failure of normal source. A local warning visualand audible alarm is required prior to cranking the engine.

7. The automatic starting controls shall provide four 5 equal length cranking

cycles before the signal indicating failure to start is initiated.

8. Controls shall include an adjustable 0 to 2 minutes time delay to circumventmomentary voltage dips and an adjustable time delay from 5 to 25 minutesagainst re-transfer to normal. After re-transfer of load back to normal, theengine shall run for 5 minutes unloaded and then automatically shut down,ready for immediate operation.

9. A frequency relay shall be provided to prevent transfer from normal togenerator source except when generator frequency is between 58 and 62 Hz.

10. Voltage sensing relay shall prevent transfer to emergency generator exceptwhen generator voltage is within 5% of normal voltage.

11. Transfer shall be designed for on-load switching on normal and emergencysources, at rated voltage and current. Auxiliary contacts shall be provided forlight indication of generator operation.

12. A synchroscope shall be used with adjustments of voltage and frequency tomanually synchronize the generator for testing on loads.

13. The battery console shall be incorporated with automatic transfer switching.The generator set shall power the charger during unit operation when thenormal source is out.

14. Audible and visual alarm signals shall be transmitted with control cables tospecific areas as shown on the Contract Drawings.

15. All transfer switches complete with relays, timers and associated accessoriesshall be listed by UL and approved for use on emergency system.

M. Nameplates

1. Engine and generator shall have a stainless steel nameplate attached bystainless steel screws or rivets and mounted at approximately eye-level insuch a way that the information can be read after the equipment is installed.

2. Entries shall be marked by etching, engraving or other methods of permanentmarkings.

3. Each nameplate shall contain the following performance data:

a) Serial number.

b) Manufacturers name and year of manufacture.

c) Voltage.

d) Output kVA.


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e) Output kW.

f) RPM.

g) Frequency.

h) Number of poles.

i) Temperature rise of armature.

j) Temperature rise of field.

k) Number of phases.

l) Power factor.

m) Excitation voltage.

n) Excitation current.

o) Buyers purchase order number.

p) Connection Diagram indicating winding terminals.

N. Space Heaters

1. Generator shall be supplied with heaters with a nameplate voltage rating oftwice the supply voltage as specified on the Contract Drawings. The heatersshall protect the generator, generator circuit breaker and control componentsfrom condensation.

O. Painting

1. Diesel Generator Units could be subject to intense direct sunlight, exposure todust and abrasion by sand. Generator shall be given an anti-corrosive primercoat followed by a hard weather and abrasion resistant high gloss finish, to atotal thickness of 0.13 mm.

2. Surfaces after preparation shall be primed and painted according tomanufacturer's standard. The surface shall be given 1 further coat of epoxypaint. Metallic flake paint shall not be used on any part.

2.05 MOTORS

A. The Contractor shall supply motors operating at 60 Hz. The voltage rating, number ofphases and type of the motor shall be as specified on Contract Drawings. The motorsshall be supplied as per NEMA MG1.

B. Rated Output

1. Motor rating shall be determined by the intended duty.


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a) The majority of motors shall be employed as continuous duty machine, ifnot specified.

b) All the motors which are required to drive load for a period of more than3 hours shall be specified for continuous duty.

2. Horsepower ratings shall be adequate for operating the connected loadscontinuously in the prevailing ambient temperatures in areas where the motorsare installed, without exceeding the NEMA standard temperature rise for themotor insulation.

C. Motor designs, as indicated by the NEMA code letters, shall be coordinated with theconnected loads to assure adequate starting and running torque.

D. The motors supplied shall be either induction or synchronous motors as follows:

1. Induction Motors

a) Induction motors shall be used for most of the Royal Commissionapplications as these motors are robust and simple in construction.

b) Induction motors shall employ a distributed stator winding and cage typerotors.

2. Synchronous Motors

a) Synchronous motors shall be used for:

1) Low speed and high power applications such as reciprocatingcompressor. The synchronous motors are more efficient, smallerand lighter than equivalent induction motors for such applications.

2) High speed, high power and high inertia applications such as axialcompressor or centrifugal pumps where temperature rise duringstarting of the motor is of prime consideration.

3) Installations where supply system cannot meet the laggingvarying requirements of induction motors resulting in excessivevoltage drop.

b) Synchronous motors shall be self-starting, utilizing a 3-phase distributedstator winding and salient pole rotors. The excitation supplies shall be ofthe brushless type employing a rotary brushless exciter and rotatingdiodes.

E. Construction

1. Stator

a) Frame and Base Plate

1) The stator frame shall be of fabricated steel construction withsufficient strength and rigidity to withstand the stresses to which itmay be subjected in handling, transporting or due to short circuitor other forces when in service.


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2) Bases for motors 185 kW and above shall be provided withmechanical devices to permit accurate horizontal alignment.These mechanical devices such as jack screws shall be installedon the base plate of the frame.

b) Winding1) Windings shall be treated to withstand tropical conditions and the

corrosive effects of industrial sulfurous atmospheres.

2) Form wound stator coils shall be utilized for the motors with ratedvoltage 2.3 kV and above.

3) All motor windings shall be adequately braced to permitapplication of voltage at 133% of rated value.

c) Winding Temperature Monitoring

1) Three lead type, 100 ohm, Platinum Resistance TemperatureDetector (RTD), calibrated at 0C (32F) shall be utilized formonitoring stator winding temperature as well as for protectiverelaying in accordance with IEEE C37.96. RTDs shall be providedin slot portion of stator winding coils as follows:

(a) All motors rated 375 to 7500 kW shall be provided with6 RTDs, two each per phase.

(b) Motors rated 7500 kW and above shall be provided with9 RTDs, three each per phase. Thermistors shall not beused in motor windings.

2. Rotor

a) General

1) Induction motors shall have a cylindrical rotor of the squirrel cagetype and synchronous motor shall have salient pole rotor.

b) Rotor Winding

1) The rotor winding of induction machines shall be of the cage type,formed from copper, copper alloy or aluminum bar.

2) The rotor body of synchronous machines shall be of the salientpole type with the windings of insulated copper wire or strip,treated to withstand tropical conditions.

3) On squirrel cage rotors, end ring connections shall be of highmechanical strength. Filler metals used shall be resistant to attackby sulfurous gases.

3. Insulation of Stator and Rotor Windings

a) Continuous and intermittent rated motors shall be insulated with Class Finsulation. Use of Class B insulation is not acceptable.

b) The maximum permissible temperature for insulation shall not exceedwhen the motor operates at 50C ambient.


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4. Bearing

a) Bearings may be anti-friction (ball/roller) or sleeve type. The selection ofthe bearing system shall be in accordance with speed factor as follows:

1) Anti-friction, grease or oil lubricated bearing shall be used up to

speed factor of 250000.

2) Sleeve type of bearing shall be used for the speed factor between250000 and 300000.

3) Anti-friction, oil lubricated bearing shall be used for speed factorabove 300000.

b) Anti-friction bearings shall typically have an internal fit in accordancewith Class 3 of the Antifriction Bearing Manufacturers AssociationStandards.

c) Ball bearings are preferred to roller, and when provided shall bemanufactured from vacuum degassed steel to motor quality.

d) Sleeve bearings shall be of the journal type horizontally split to facilitateerection and maintenance. The bearing shell halves shall have a whitemetal lining and may be self-aligning permitting the bearing to adjustthemselves to static deflection of the shaft.

e) The anti-friction and sleeve bearing metal temperature shall not exceed90C based on a maximum ambient of 50C.

f) The bearing shall be insulated to prevent circulation of stray currentsinduced in rotor shaft which may damage the rotor shaft journal orbearing.

5. Vibration

a) Motors shall be dynamically balanced. The use of solder or similardeposits is not acceptable. Parent metal removed to achieve dynamic orstatic balance shall be drilled out in a manner which will maintain thestructural integrity of the rotor. Chiseling or sawing is not permitted.

b) All motors shall have provisions for future in-situ balance adjustments bythe buyer.

6. Cooling

a) The stator and rotor of the motor shall be air cooled. For certain design

of motors, secondary cooling system using air cooled heat exchangershall be employed, if required.

7. Enclosures

a) Totally Enclosed Fan Cooled (TEFC)

1) This type of the enclosure shall be provided for the motors ofrating up to 11000 kW.


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2) The motor shall be totally enclosed and equipped with externalcooling by means of a fan or fans integral with the machine butexternal to the enclosing parts.

b) Totally Enclosed Air to Air Cooled (TEFC/CACA)

1) This type of enclosure shall be provided on larger machines foreffective cooling.

2) The motor shall be totally enclosed and shall be cooled bycirculating external air. It is provided with air to air heat exchangerfor cooling the internal air. The internal air shall be circulated by afan integral with the rotor shaft. External air shall be circulated byseparated fan.

c) Weather Protected WPII

1) This type of enclosures shall be used for synchronous motors withrated output above 11000 kW, where cost advantage over TEFCtype is significant.

2) WPII enclosure shall be provided with access to enable inspectionof stator end windings, cleaning of high voltage connectors orleads and removal of dust without removal of motor assemblies.

d) Classified Areas

1) Motors in classified areas shall have explosion proof enclosure.These enclosures shall comply with the requirements ofNEC Article No. 501.8, 502.8 and 503.6.

8. Terminal Boxes

a) The terminal boxes shall meet or exceed the enclosure requirements for

the main machine. Terminal boxes and connectors must withstand theeffects of faults as follows:

1) To contain or relieve the consequences of an internal terminal boxfault without an external detrimental effect to personnel.

2) Terminal box shall be adequately sized for line and neutral endcable terminations.

9. Nameplates

a) Motors shall have a stainless steel nameplate attached by stainlesssteel screws or rivets and mounted in such a way that the informationcan be read after the equipment is installed.

b) Entries shall be marked by etching, engraving or other methods ofpermanent markings.

c) Motor nameplate shall show all the data required by NEMA MG1. Inaddition to this, the following data shall be included on the nameplate.

1) Buyers purchase order number.

2) Year of manufacture.


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3) Maximum ambient temperature specified in this Section for whichthe motor is specifically designed.

10. Space Heaters

a) Motors shall be supplied with heaters with a nameplate voltage rating oftwice the supply voltage as specified on the Contract Drawings. Theheaters shall protect the motors from condensation during theirprolonged outages.

F. Frame Sizes

1. Frame sizes refer to the set of physical dimensions of motors as establishedby NEMA. These dimensions include critical mounting dimensions.

2. The frame sizes for various motors shall be in accordance with NEMA MG1,Section I, Part 4.

G. Operating Characteristics of Motors

1. Different motors of the same rating can have varying starting current, torquecurve and other variables. The four NEMA design have unique speed-torquerelationships making them suitable for different type of applications:

a) NEMA design A motors shall have:

1) High to medium starting current.

2) Normal locked rotor torque.

3) Maximum slip of 5%.

b) NEMA design B motors shall have:

1) Low starting current.

2) High locked rotor torque.

3) Maximum slip of 5%.

c) NEMA design C motors shall have:


2) High locked rotor torque.

3) Maximum slip 5%.

d) NEMA design D motors shall have:


2) Very high locked rotor torque.

3) Maximum slip varying between 5 to 10%.

2. For various values of starting current and locked rotor torques for differentmotor ratings, refer to NEMA MG1, Section II, Part 12.


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H. Speed Control of Motors

1. Multi-speed motor shall be provided if required for particular application asstated in the Contract Document.

2. The speed of the motor shall be changed by varying the connections. A motorshall be wound in such a way that by varying the connections at stator, thespeed of the motor shall be changed.

I. Effect of Load Inertia

1. The time required for acceleration or deceleration of the motor depends uponthe inertia of the load to which the motor is connected. The larger the inertiaload, the larger will be the time taken by motor to accelerate or decelerate.

2. For a high performance, load inertia reflected on motor side shall not exceedthe motor inertia by more than 10 times. Further increase in load inertia willcause unstable system behavior and inefficient power usage.

J. Motor Starters

1. For various types of motor starters, refer to SECTION 16440.


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PART 3 EXECUTION

3.01 GENERAL

A. The Contractor shall provide all materials, equipment and labor as deemed

necessary for complete and proper execution of the work.

B. After the installation is completed and properly adjusted, the Contractor shall conductoperating tests. The various equipment and systems shall be demonstrated tooperate in accordance with the requirements of the specifications. Tests shall beperformed in the presence of the Royal Commission's representative. The Contractorshall provide electric power, instruments and personnel necessary for performing thevarious tests.

3.02 INSTALLATIONS

A. General

1. All installation details, write up on handling of the equipment, instructionmanuals and latest revised drawings furnished by manufacturer shall beavailable at site prior to installation of the equipment. These details shall bereviewed by Royal Commissions representative. The details and instructionsfurnished in these documents shall be followed carefully during installation ofthe equipment.

2. Ensure that all buildings and rooms for the installation of the equipment areready, complete and clean. All embedded channels and anchor bolts shall bein place as per layout drawings.

3. All the facilities required for transportation of electrical equipment from store to

site such as competent manpower, crane and trucks of adequate capacitiesshall be supplied by the Contractor.

4. All equipment moved to the site shall be inspected for damage or deteriorationduring storage. Tag numbers and nameplates shall be verified with the detailsgiven on the Contract Drawings.

5. Installation of the equipment shall be in accordance with the NEC,manufacturers instructions and as shown on the Contact Drawings.

B. Installations

1. Diesel Generator Sets

a) The engine-generator set shall be mounted on concrete base not lessthan 300 mm thick.

b) The base shall be constructed independent of the floor slab of thegenerator room. The base shall be isolated from the floor slab withgranulated cork of proper thickness, or other approved material and thespace shall be sealed with an approved expansion joint material.


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c) For excavation, mass structure backfill under bases, unclassifiedstructure backfill around bases, disposal of surplus and unsuitablematerial, refer to SECTION 02315.

d) Any soft, spongy or other unstable ground at a concrete base shall be

removed and replaced with compacted mass structure backfill asspecified in SECTION 02315.

e) Refer to SECTION 03310 for construction of concrete bases.

f) The entire unit shall be aligned and mounted on pad type vibrationisolators as follows:

1) Vibration isolators mounting bolts shall be securely anchored tothe base.

2) The base of engine generator set shall be bolted and supportedon vibration isolators.

3) Sufficient number of isolators shall be installed so that the floor

(pad) bearing pressure under each isolator is within the floor (pad)loading specification.

4) Equal number of isolators shall be installed on each side of theengine generator set's base.

5) Isolators shall be located for approximately equal load distributionand deflection per isolator. Base of the engine generator set shallbe drilled at the factory for the isolator bolts.

6) All connections between the engine generator set and exteriorsystems, such as fuel lines, electrical connections, engineexhaust system and air exhaust shroud, shall be flexible.

g) The engine generator set shall be balanced properly so that thevibration velocity in the horizontal, vertical, and axial directions shall notexceed 16.25 mm per second peak at any specific frequency. Theselimits apply to main structural components such as the engine block andthe generator frame at the bearings.

h) Exhaust Air from Radiator

1) The exhaust air from the radiator shall be discharged through theopening in masonry wall.

(a) The opening in the wall shall not be less than thedimension of the radiator.

(b) Noncombustible flexible connections made of 20-ounce

neoprene coated fiberglass fabric shall be providedbetween radiator and opening of the wall.

(c) The opening in the wall shall be fitted with a rain guardlouvers.

i) Exhaust Gases from Engine

1) The exhaust pipe work, required for connecting to the exhaustoutlet of the engine for discharging exhaust gases to the


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atmosphere, shall be mounted on an efficient suspensionbrackets fitted with an expansion joints between piping andmuffler of the engine.

2) The pipe work shall be insulated with 50 mm thick glass fibercovered with an aluminum jacket of minimum thickness 0.8 mm.

The jacket is to be held in place by 0.38 mm thick and 15 mmwide aluminum bands.

3) The pipe work shall be supported in such a way that its weightshould not fall on engine or muffler.

4) The opening through which pipe enters the atmosphere shall besealed properly by appropriate sealant.

5) The exhaust outlet shall be protected from any obstruction as wellas falling or infiltration of foreign elements by an appropriatearrangement.

6) The installation shall be neat, thermally and structurally tightwithout sag, neatly finished at all hangers or other penetrations

and shall provide a smooth finish surface.

7) Insulation and jacket shall terminate hard and tight at all anchorpoints.

j) All mechanical system shall be installed and connected properly asshown on the Contract Drawings.

k) All power and control wiring shall be completed as per the ContractDrawings.

l) Adequate working space/clearances shall be maintained around dieselgenerator set as recommended by manufacturer. However the minimumclearance around the set shall not be less than 1 m from nearest object.

m) Grounding of the diesel generator set shall be carried out as specified inSECTION 16060.

2. Motors

a) Motor unit shall be mounted on a firm flat concrete base sufficiently rigidto prevent vibration.

b) The motor foundation must rigidly support all 4 legs in the same plane.The shims shall be placed under the motor leg as required so that theywill not be pulled out of the plane when mounting bolts are tightened.

c) Any items removed during shipment of the motor shall be reinstalled.

d) Guards shall be provided for all exposed rotating parts to preventpossible personnel injury.

e) Electrical Connections

1) All power and control wiring to the motor shall be done inaccordance with NEC.


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2) Power connections shall be made to drive the motor in the samedirection as required by driven equipment.

3) Before coupling the driven equipment, the motor shall beenergized momentarily to check that the direction of rotation isproper.

f) Drive belts and chains shall be tensioned in accordance with supplierrecommendations.

g) Couplings shall be properly aligned and balanced.

h) Grounding of the motor shall be carried out as specified inSECTION 16060.

3.03 TESTING AND COMMISSIONING

A. General

1. The Contractor shall carry out all site tests in accordance with approved testprocedure to ensure that the equipment and materials comply with thespecifications and operational requirements. All tests are subject to witnessingby the Royal Commission representatives.

2. At least 4 weeks prior to scheduled tests, the Contractor shall submit to RoyalCommission an outline of the plan and procedures to be used in performingthe site inspection and site tests. This outline shall include a brief descriptionof the test equipment, connection diagrams, proposed tests and procedures,test sheets, calculations, reference drawings and minimum/maximum test andperformance values in conformance with applicable standards which will beused to determine conformance with the specification and acceptability of the

equipment and installation.

3. Upon completion of installation and prior to final acceptance, each componentof each system shall be tested to the complete satisfaction of the RoyalCommission. The various equipment and systems shall be demonstrated tooperate in accordance with the requirements of the specifications.

4. The Contractor shall provide all test instrumentation, equipment andaccessories necessary for demonstration and putting the equipment intooperation.

5. All testing equipment shall be calibrated by approved authorities andcalibration certificate shall be provided to Royal Commission for their review

and approval.

6. Upon completion of all testing, the Contractor shall submit 5 copies of acertified report attesting that each test has been performed in accordance withthe approved test procedures. The report for each test shall include the nameof the person in charge of test and the date of performance. All factory andfield test reports shall be included in Operation and Maintenance Manuals.


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B. Checking and Testing of Diesel Generator Set

1. The following checks shall be carried out prior to testing the Diesel Generatorset:

a) Check interior and exterior of the equipment for physical damage ordefects, if any.

b) Check the condition of lifting lugs and tightness of all bolt connections.

c) Check for rust spots, if any, and ensure that paint finish has beenrestored as required.

d) Field work and terminations completed.

e) Mechanical checkout of prime mover completed.

f) Nameplate ratings on all control and instrument transformers verified.

g) All devices (relays, meters, fuses, etc) installed and set properly as perthe Contract Drawings.

h) Ground bus bar continuity and connections to plant ground grid/busverified.

2. The following tests shall be carried out on Diesel Generator sets:

a) Insulation resistance test on:

1) Generator winding.

2) Potential and control transformer primary winding.

3) Power and Control wiring.

b) Proper operation of auxiliary devices, governor, voltage regulator,excitation supply and tripping of each relay scheme shall be tested.

c) Performance Test shall be conducted at rated voltage and frequency asstated below:

1) 30 minutes running at 50% load.

2) 30 minutes running at 75% load.

3) 4 hours running at 100% load.

4) 2 hours running at 110% load.

5) Single step load pick-up of 50% nameplate kW rating at 0.8 pf,and 100% load pick-up within 10 seconds of start-up.

6) The following test data shall be recorded at every 30 minutesinterval while performing above test:

(a) kW.

(b) Voltage on each phase.


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(c) Amperes on each phase.

(d) Engine RPM.

(e) Frequency.

(f) Engine water temperature.

(g) Fuel pressure

(h) Oil pressure.

(i) Outdoor temperature.

(j) Average ambient temperature in the vicinity of the dieselengine.

(k) Average ambient temperature in the vicinity of the startingbatteries.

d) Battery and Starting System Test

1) Operation of batteries and cranking motor shall be demonstrated

to prove that they are capable of 5 starting attempts of 10 secondcranking each at 10 second intervals with the battery chargerturned off.

e) Panel Test

1) Functional tests on all control circuit shall be performed usingelementary diagram.

2) Engine failure conditions shall be simulated to test the properoperation of each indicating lamp, alarm device and reset button.

f) Fuel Oil Consumption.

C. Checking and Testing of Motors

1. The following checks shall be carried out prior to testing of motors:

a) Check the outside of the motor carefully for damage with particularattention to terminal box, fans and covers.

b) Check the tightness of all hardware and accessories which may havebecome loose during handling.

c) Check that motor shaft rotates freely by turning it by hand.

d) Check interior and exterior of the equipment for cleanliness and check

that the paint finish has been restored as required.

e) Check all connections are carried out as per elementary wiring diagram.

f) Check ground bus bar continuity and connections to plant ground grid.

2. The following test shall be carried out on motors:

a) Insulation resistance test on winding in accordance with IEEE 43.


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b) Polarization index test.

c) Functional tests on all control circuits as per elementary wiring diagram.

D. Acceptance and performance testing of synchronous machine shall be in accordance

with IEEE 115.

END OF SECTION

SECTION 16220 Motors and Generators, Rev 0

Documents

Transcript of SECTION 16220 Motors and Generators, Rev 0