Gas Engine Spec [PDF]

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S3 / S6 COMPRESSOR STATIONS SPECIAL SPECIFICATION

NATIONAL IRANIAN GAS COMPANY (N.I.G.C.)

THIS DOCUMENT IS OUR PROPERTY AND SHALL NOT BE USED NOR REPRODUCED WITHOUT OUR WRITTEN AUTHORIZATION

01.24

CE DOCUMENT EST NOTRE PROPRIETE ET NE DOIT ETRE NI UTILISE, NIREPRODUIT SANS NOTRE AUTORISATION ECRITE.

92/98 bd Victor Hugo 92115 CLICHY - FRANCE Téléphone 01.41. 06.30.00 Télex 620 428 SOFRGAZ Fax 01.47.37.16.27 E-mail [email protected]

GAS ENGINE GENERATOR PACKAGE

Date : 22/05/00 Rév./Amend. 0

Etablis./Establ. Ph. SAINTE-FOI Vérif/Check MC. CAUSSIN

Projet/Project EMISSION POUR/ISSUE FOR Ph. PEZE First issue Approbat./Approval N° RC291.SP.000.0300.0001 R. ORTIGER

Page 1/32

REVISION RECORD

Revision

Date

Established

Checked

Project

Approved

Issue for

0

22/05/00

PSF

MCC

PZE

ROR

First issue

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CONTENTS

1.

GENERAL

1.1

PURPOSE

1.2

DEFINITION OF TERMS

1.3

DEFINITION OF SUPPLY

1.3.1

Duty

1.3.2

Altitude, ambient temperature

1.3.3

Fuel composition

1.3.4

Power

1.3.5

Dual operating voltage 380 V / 400 V

1.3.6

Installation

1.4

EXTENT OF SUPPLY

1.4.1

Option

1.4.2

Limits of supply

1.4.3

Exclusions from supply

1.5

UNIT AND LANGUAGE

2.

APPLICABLE CODES, NORMS AND STANDARDS

3.

NOx, CO AND HC

4.

FACTORY TESTS

5.

TECHNICAL REQUIREMENTS

5.1

SKID

5.2

ENGINE REQUIREMENT

5.3

SYNCHRONOUS GENERATOR

5.3.1

General data

5.3.2

Information to fill out

5.4

PROTECTIVE RELAYS

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5.5

GAS ENGINE GENERATOR SET CONTROL PANEL

6.

ASSOCIATED SUPPLIES

7.

ASSOCIATED SERVICES

7.1

GENERAL

7.2

DOCUMENTATION AND DOCUMENTS

7.2.1

Documentation

7.2.2

SUPPLIER documentation

7.2.3

Reviewed documents

7.2.4

Good and as built documentation

7.2.5

Test procedure documentation

8.

WARRANTIES

8.1

WARRANTIES AGAINST FAULTY DESIGN

8.2

PERIOD OF WARRANTIES

9.

QUALITY CONTROL

10.

OTHER INFORMATION

10.1

CABLES SPECIFICATION AND PROCUREMENT

10.2

EARTHING SYSTEM

10.3

FIRE AND GAS DETECTION

11.

APPENDICES APPENDIX 1 -

GAS ENGINE AND FOR S3 STATION

GENERATOR

DATA

SHEET

APPENDIX 2 -

GAS ENGINE AND FOR S6 STATION

GENERATOR

DATA

SHEET

APPENDIX 3 -

GENERATOR BUILDING DRAWING

APPENDIX 4 -

MAP

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1.

GENERAL

1.1

PURPOSE The purpose of this document is to provide the minimum technical requirement for the supply of two gas engine-generator sets, and the associated supply and services. The two gas engine generator sets shall be installed at two different sites : - S3 station , at 2061 m elevation :

2000 kW

- S6 station, at 1371 m elevation :

1500 kW.

The thermal mover will be a natural gas fueled reciprocating engine. The generator set will be used to provide an emergency power in case of failure of normal grid supply. This document applies exclusively to : S3 compressor station and S6 compressor station, a project of NIGC, Iran. 1.2

DEFINITION OF TERMS Within the context of this document, the following words shall have the meanings stated : - N.I.G.C.

:

means National Iranian Gas Company

- SHALL

:

indicates a mandatory requirement

- SHOULD

:

indicates a recommendation or that which is advised but not required

- CONTRACTOR

:

means the Company that will place the order

- SUPPLIER

:

mean the manufacturer or the company which SUPPLIES the two gas engine generator sets

- PACKAGE

:

means a complete equipment assembly.

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1.3

DEFINITION OF SUPPLY

1.3.1

Duty This generator set has a stand-by role. A prime power for electrical production is not required. Grid outage may last as long as 8 hours. Cumulative grid outage is presumably less than 500 hours a year. Therefore, the generator set will be built as follows : - temperature equilibrium : continuous running duty, S1 as per IEC 34-1 or ISO 8528-1, - engine wear : light duty, - 10 %, 1 hour overload : yes.

1.3.2

Altitude, ambient temperature Both compressor stations are located at high altitude : S3 Station

S6 Station

Altitude, above mean sea level

2061 m

1373 m

Ambient temperature minimum

- 19 °C

- 14 °C

Ambient temperature maximum

+ 37 °C

+ 43 °C

Design temperature for de-rating

32.2 °C

37.8 °C

35 °C

40 °C

Design temperature for coolers

A de-rating factor will be advised and applied by manufacturer, hereafter called "SUPPLIER" to a dependable and proven product to get the required output. 1.3.3

Fuel composition - Methane

: 88 %

- Nitrogen

: 4.8 %

- Ethane

: 4.8 %

- Carbon dioxide

: 0.3 %

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1.3.4

Power Power requirements are : - 2000 kW for S3 station, - 1500 kW for S6 station. These ratings are understood as : - after de-rating factor due to altitude, - continuous running service, - at generator terminals, - at design temperature as specified (paragraph 1.3.2), - fed by natural gas as above, - 10 % overload 1 hour.

1.3.5

Dual operating voltage 380 V / 400 V Required voltage is : 380 V / 400 V, 3 phases, 4 wires, 50 Hz. 400 V is the standard operating voltage for new low voltage systems (IEC 38 – 1983, 20 years to change progressively from 380 V to 400 V). The existing system is 380 V, 50 Hz. These generator sets will operate at 380 V. It would be wiser to use a standard manufactured generator 400 V and complete the AVR by a set point selector to allow operation at either 380 V or 400 V. AVR with a continuous setting knob (potentiometer) would be acceptable.

1.3.6

Installation The generator set will be installed indoor, inside a generator building (drawing in Appendix 2). Generator buildings are identical at both sites. The radiator will be outside the generator building. Exhaust gas will be evacuated through the building roof. [Continue on paragraph 4 : technical requirements]

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1.4

EXTENT OF SUPPLY The supply includes : - two natural gas fueled engine-generator set built on skid : . power as per dedicated paragraph, . 400V / 230 V, 3 phases, 4 wires, 50 Hz, - AVR : . regulation range : from 360 V to 420 V, - starting system : pneumatic or by battery per SUPPLIER's Standard, - control panel with PLC and remote control feature, - protective relays and current transformers, - control cables and small power cables within generator set package, - fuel gas inlet unit with flexible hose to the engine, - outdoor radiator (if any) : warm and hot water piping network to the engine, - exhaust system with flexible bellows and exhaust pipe to the building roof, - generator circuit breakers : . S3 Station : > 4200 A, 3 phases, 4 poles, 55 kA . S6 Station : > 3200 A, 3 phases, 4 poles, 55 kA, - factory routine test per IEC and ISO standards, witnessed by CONTRACTOR, - site test when option is ordered, - installation studies based on CONTRACTOR's generator building drawings, - documentation, - site commissioning if option is ordered and as built drawings, - consumable for start-up (except fuel gas), - list of spare parts for two years (1000 hours) of operation, - sea worthy packing, SEI standard for thermal engine, - packing list

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1.4.1

Option Associated optional supplies are : - sound traps and louvers for sound attenuation to 75 dB outside building. - capital spare parts (sensitive and hard to find parts for reparation when far away from SUPPLIER factory), - special tools for erection and for regular maintenance, - erection supervision, - site and acceptance test by SUPPLIER, - training, - fire and gas detection, - load test in factory (see paragraph 4).

1.4.2

Limits of supply The limits of supply are : - Tie in point : fuel gas inlet flange of gas inlet unit, 150 Lbs, according to ASME/ANSI B16.5 (raised face, stock finish). - Tie out point : generator circuit breaker, outside connection pads. - Heater : terminal box on engine. - Remote control : control panel terminal blocks. - Generator frame to earth : 2 earthing studs, minimum. - Generator neutral : star point (star point formation by SUPPLIER). - Neutral CT : supplied loose. Within limits of supply, the generator set shall be : - operational manually, - operational when receives remote start / stop signals.

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1.4.3

Exclusions from supply They are : - local erection work, - civil works, - power cables outside package such as generator main cables, neutral to earth cable.

1.5

UNIT AND LANGUAGE English is the contractual language. Metric system shall be used.

2.

APPLICABLE CODES, NORMS AND STANDARDS The following codes and standards shall be applied : INTERNATIONAL STANDARD ORGANIZATION - ISO 8528

:

- ISO 3046-1 to 7 :

Reciprocating internal combustion alternating current generating sets.

engine

driven

Reciprocating internal combustion engines.

INTERNATIONAL ELECTROTECHNICAL COMMISSION - IEC 60034-1

:

Rotating electrical machine : rating and performance.

- IEC 60034-9

:

Rotating electrical machine : noise limits.

- IEC 60034-22

:

Rotating electrical machine : Ac generators reciprocating internal combustion engine.

- IEC 60947-2

:

Low voltage circuit breakers.

for

This listing is not limitative.

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3.

NOX, CO AND HC At the exhaust, the maximal values for NOx, CO and HC shall not be greater than the following : - NOx

:

350 mg / Nm3

- CO

:

650 mg / Nm3

- HC

:

150 mg / Nm3

These values of NOx, CO and HC shall be understood with a residual oxygen concentration of 5 %, in the exhaust gas.

4.

FACTORY TESTS - IEC and ISO routine tests. - Standard SUPPLIER tests certificates. - Load tests (optional) : . 1 hour at 50 % nominal load, . 1 hour at 785 % nominal load, . 4 hours at 100 % nominal load, . ½ hour at 110 % nominal load, . synchronizing simulation. - Test report – Witness with customer.

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5.

TECHNICAL REQUIREMENTS

5.1

SKID The gas engine generator sets shall be made of the following components : - base frame, common for engine and generator, made of rugged structural steel, - anti-vibrations mounts, - flexible hoses, flexible bellows (for outside connections : fuel gas, exhaust gas, coolant waters, lube oil drain, crank case breather filter drains), - gas engine with built on governor, - synchronous generator, brushless, - flexible coupling engine / generator (torque damper), - auxiliary generator with DC output to charge the starting battery, - or else pneumatic starting system with air compressor and air reservoir, - preheating system (the gas engine generator sets shall be ready to start at 40 °C) with resistance fed by normal AC source, - generator set termination boxes, sensors, controls, heaters.

5.2

ENGINE REQUIREMENT - Power rating . Combustible . Temperature

: : :

see paragraph 1.2.4. see paragraph 1.2.3. see paragraph 1.2.2.

- Service

:

see paragraph 1.2.1.

- Over load

:

see paragraph 1.2.4.

- Noise limit

:

IEC and ISO standards.

- Cycle

:

2 or 4 stroke (quick start advantageous).

- Casing

:

mono block.

- Speed

:

1500 rpm.

- Governor accuracy

:

– 0.5 % to + 0.5 %, digital type, reliable and proven product from a well-known SUPPLIER.

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- AVR accuracy

:

– 0.5 % to + 0.5 %, digital type, reliable and proven product from a well-known SUPPLIER.

- Generator

:

see paragraph 4.4.

- Operating time meter

:

in hours and 1/100 of hours.

- Starting system . Store energy . Alternate system

: : :

pneumatic 6 complete starting sequences DC motor Air compressor (or battery charger) shall be supplied including adequate air reservoir (or maintenance free lead acid battery capacity)

- Fuel gas supply

:

the pressure reducing valve from compression station pressure to engine pressure will be provided by

- Sparking system : . Principle . Spark . Coil

: : :

electronic one per cylinder one per head cylinder

- Gas intake system . Filter . Duct . Joint

: : : :

SUPPLIER's standard (3.5 bars) standard of SUPPLIER required anti-vibrating, or outside mounted with flexible hose.

- Air intake system . Principle . Filter . Cooling

: : :

turbo-charged, engine mounted dry air / water.

- Exhaust system . Exhaust . Noise limit . Silencer . Flexible bellows . Exhaust conduit . Safety

: : : : : :

one per engine 75 dB (at 1 m from building wall) standard of SUPPLIER included (standard) by SUPPLIER's installation study, waste gas valve

CONTRACTOR.

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- Lubrication . System . Main pump . Pre lube oil pump . Post oil pump . Oil cooling . Filter . Preheating . Oil consumption . Oil (tank) . Oil refilling during running . Temperature metering . Pressure metering

: : : : : : : : : : : :

under pressure crankshaft driven if any not required standard of SUPPLIER required standard of SUPPLIER 0.5 g / kWh maximum in the crankcase not required 2 steps (alarm + fault) 2 steps (alarm + fault)

- Cooling system . Principle . Main pump . Other pump . Preheating . Temperature metering

: : : : : :

water air coolers, closed circuit direct driven or belt driven electric driven if any standard of SUPPLIER 2 steps (alarm + fault)

- Air coolers . Location . Water pipes

: : :

standard of SUPPLIER outside generator building by SUPPLIER's installation study

- Additional mechanical meters for oil and water on the engine itself . Water cooling system : temperature only . Oil cooling system : temperature and pressure - Temperature sensors . In the exhaust . Cylinder head

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5.3

SYNCHRONOUS GENERATOR

5.3.1

General data The minimum requirements of the synchronous generator shall be as follows : - rated power, 3 phases, 50 Hz : . S3 station, after de-rating : 2500 kVA, pf 0.8 . S6 station after de-rating : 1875 kVA, pf 0.8 At sea level altitude, catalogue rating must be above these figures.

5.3.2

- frame

:

IP 23, self ventilated

- efficiency

:

≥ 96 %

- rated voltage

:

380 V / 400 V, phase to phase (see paragraph 1.3)

- operating voltage : phase to phase

:

380 V, + 10 % / – 10 %

- phase winding

:

6 terminals to bring out

- insulation . stator . rotor

: :

class H class H

- heating, temperature rise

:

class F

- number of bearings

:

2

Information to fill out Independently of data sheet in Appendix 1, SUPPLIER is requested to fill out and / or confirm the following information : S3 Station - apparent power rating (kVA)

:

- current rating of stator (A)

:

- voltage rating of stator Un between phases

:

S6 Station

- voltage rating of stator Un between phase and neutral : - power rating factor : Cos phi

:

- short circuit ratio : Kcc

:

- longitudinal synchronous reactance : Xd/

:

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S3 Station - transversal synchronous reactance : Xq %

:

- longitudinal transient reactance : X'd %

:

- longitudinal sub-transient reactance : X"d %

:

- transversal sub-transient reactance : X"q %

:

- zero sequence reactance : Xo %

:

- armature leakage reactance : Xs %

:

- reverse reactance : X2 %

:

- zero sequence resistance : R0 %

:

- DC resistance of winding, per phase of the stator at 20 °C Ra ohms

:

- direct resistance : R1 %

:

- resistance of rotor Winding at 20 °C Rf : ohms

:

- constant of longitudinal transient time in short circuit : t'd's

:

- constant of longitudinal sub-transient time in short circuit : t"d's

:

- transversal sub-transient time constant in short circuit : t"q's

:

- time constant in short circuit of stator

:

- Number of probes . PT 100 embedded in the winding . Bearing, thermocouple

: :

S6 Station

The following drawings, graphs, data sheets and descriptive bulletins shall be provided : - outline dimension drawing, - voltage, excitation curve, - V curve, - P / Q graph, - generator data sheet, - governor data sheet, - AVR data sheet, - protection relays descriptive bulletin, 01.02

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5.4

PROTECTIVE RELAYS One multifunction digital relay will be provided. The relay shall be programmable. Multi-threshold must be available by program for each of the following protective functions : - generator differential

:

87

- overload

:

49

- reversed power

:

32

- short circuit, voltage restraint

:

51 V

- zero sequence current

:

51 N

- over-voltage

:

59

- under-voltage

:

27

- loss of excitation

:

78

- over-frequency

:

80 O

- under-frequency

:

80 U

Being alone, distance relay 21 (out of step) and negative sequence current relay 46 are not required. The relay will be also a metering device. Through a key board, electrical quantities may be read at any time with an accuracy of 0.2 % : - phase current

:

I1, I2, I3

- phase voltage

:

U12, U23, U31

- neutral voltage

:

V1, V2, V3

- active power

:

P

- reactive power

:

Q

- power factor

:

pf

- active energy

:

kWh

- reactive energy :

Kvarh

and many other quantities.

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This device shall have serial port for link to the DCS (RS 485 and other protocols) transmitted signals are : measurements, relay operation signals, status signals, circuit breaker control commands, etc. The device shall not be sensitive to CT saturation phenomena. Matching CTs for differential protection shall not be required. One set of 3 CTs, ring core type, In/5A, 10 VA 10P10 will be provided for overcurrent and differential protection. One set of 3 CTs, ring core type, In/5A 10VA 10P10 will be provided on neutral side of phase windings for differential protection. One set of 3 CTs, ring core type, In/5A class 0.2 will be provided for discrete components of the control panel. (In = 4000 A of S3 for S3 Station and 3000 A for S6 Station). One CT, ring core type, provided loose for site mounting, 250/5 5VA 10P10, for ground fault detection. 5.5

GAS ENGINE GENERATOR SET CONTROL PANEL The control functions are : - start and stop of the generator set, - manual operation and automatic operation, - remote start / stop is required : once command is given, the plant PLC takes over the control of the generator set operation. The synchronoscope is not required ; synchrocoupler is not required. The generator set shall be able to automatically start upon loss of 400 V mains (through generator PLC). The generator PLC shall carry out the loading sequence according to user's program. The control principle is as follows : - the generator set is full automatic, - the generator set is full manual, with a mode selector switch.

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The control principle shall be as per the following sketch : Typical principle Control cabinet

Control of gas the engine (mechanical)

Control & AVR of generator (electrical)

Gas engine

Synchronous generator

Air cooler

Breaker

In front of the control panel : - Metering for output voltages, currents and frequency, they are : . one voltmeter (with a seven positions switch) for : . voltage phase 1 / phase 2 . voltage phase 2 / phase 3 . voltage phase 3 / phase 1 . voltage phase 1 / neutral . voltage phase 2 / neutral . voltage phase 3 / neutral . stop . three meter (connected on three current transformers) : . current in phase 1, expanded scale 250° . current in phase 2, expanded scale 250° . current in phase 3, expanded scale 250° . one frequency meter (connected on synchronous generator) - Generator protective and metering device (see paragraph 5.5) to implement in this panel in order to read other electrical quantities - Switch, push-buttons and key loads : . one control-panel for the engine . one switch : emergency shut-down (locked by key, color red) . one switch : normal stop of the generator set . one switch control speed : lamps and led test . one push-button : alarm stop

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. one push-button : alarm clear . key board for gas engine control - Pilot lights and / or panel vues, they are : . panel vue : for all gas engine status (as per the standard of the gas engine SUPPLIER, if any) . one pilot light red : fault . one pilot light green : running . one pilot light yellow : normal stop and ready to start - One buzzer - Input / output status to be sent to the control station : . by TOR contacts wired on terminal block : . stop/start or running . local/remote . general fault . by serial link (RS282 or RS485) . stop/start or running . local/remote . oil pressure . water temperature . electrical relay operates . engine emergency shutdown The control panel and material inside shall be designed for continuous operation, + 35 °C design temperature. Inside wiring and components will not exceed 70 % of panel volume. The general construction shall be designed to prevent spreading or damage due to fire or electrical faults and to completely exclude accidental contact with live parts. The control panel shall have front access for operations. It shall be as per standard of SUPPLIER. However freestanding with a frame of steel profiles covered by sheet steel shall be preferred, IP 31.

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6.

ASSOCIATED SUPPLIES The intent of this specification is a complete gas engine generator package. All relevant items not mounted on the skid shall be supplied. They are : - starting system : . pneumatic : complete skid with an electric air compressor, air reservoir 30 bars, the skid is complete by itself including air pipe. Electrical wire to motor box is out of supply, paragraph 10.1) . DC starter : fully integrated on the skid including auxiliary charging generator. - noise limiting device : sound trap will be proposed as an option based on generator building drawing in Appendix 2. Louvers for air entrance shall be proposed. - Fuel gas intake : Fuel gas intake unit shall be included in the supplies (paragraph 5.2). External fuel gas pipe will be arranged by CONTRACTOR up to generator building wall. Remaining supply all the way up to the engine is part of associated supplies.

7.

ASSOCIATED SERVICES

7.1

GENERAL The SUPPLIER shall provide engineering standards, mounting instructions including correct quantities of pipes, cables and accessories. Examples of installation engineering are : - linking pipes from engine to radiator (outdoor), warm water, hot water, - exhaust pipes from engine to the building roof, - interface with fuel gas arrival, - other loose supplies and site mounted equipment such as neutral CT, - heater cable from distribution panel to engine box, - radiator cables from distribution panel to fans, - cable list, Engineering studies will be based on CONTRACTOR's information and drawings.

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In case erection is also carried out by SUPPLIER, SUPPLIER will provide as built drawings. 7.2

DOCUMENTATION AND DOCUMENTS

7.2.1

Documentation English is the contractual language. The drawings shall be under hard copy (paper) and electronic copy (Microstation, Email or diskette). No definitive drawing shall be issued before the corresponding first reviewed issue is reviewed, and no assembly started before construction drawings are approved, unless notified justification of the SUPPLIER to meet contractual delivery schedule. The documents shall be up to date for construction (as built) and shall include the installation, user and maintenance manuals.

7.2.2

SUPPLIER documentation All part of the generator set shall be fully documented. They include the following : - The complete gas engine, - the complete generator set, - all components of the generator set (engine, generator, air coolers, starter, etc.) - power connections drawings, - terminal assembly drawings, - detailed drawings, - cable book, - system hardware list (if any), - system software list, - list of application programs (if any) - programs (if any) - factory acceptance test procedures, - site acceptance test procedure (if applicable), - project schedule, - data sheets in appendices (paragraph 11).

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7.2.3

Reviewed documents These documents shall be submitted by the SUPPLIER after the supply contract, for review prior to fabrication. No fabrication is allowed without the documents having first been reviewed by the CONTRACTOR. Documents, which are part of the bid proposal, are not considered as reviewed documents. The SUPPLIER shall submit its design, study reports, analysis, workshop drawings with bills of equipment and documents as listed in the requisition to the CONTRACTOR for review. The CONTRACTOR shall return one print with comments and / or review.

7.2.4

Good and as built documentation Before erection, SUPPLIER shall certify all his drawings "Good for construction". If delivered equipment fails to conform to these drawings or documents, SUPPLIER shall correct such failures to the satisfaction of CONTRACTOR. After erection, and if ordered, SUPPLIER shall resubmit "as built drawings". As-built drawings are those submitted at the end of the job, and reflect the asfabricated, as-installed and as-tested condition of the equipment. They shall meet the requirements of the project specification.

7.2.5

Test procedure documentation The SUPPLIER shall give a complete documentation for the factory : test of the supply (and for the site and acceptance test if applicable) of the supply. These documents shall describe the following : - the proceeding, - tools and equipment for proceeding and measurements, - the data of the supply, - the attempts data and measurements.

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8.

WARRANTIES In this document the effect of the warranties are limited to the technical warranty. The SUPPLIER shall provide his generator set in full operation order. The SUPPLIER shall ensure that all sub-suppliers comply with all applicable parts of this specification and related documents, standards and code and the selected quality level. Compliance with the provisions of this specification does not relieve SUPPLIER of the responsibility of supplying equipment and accessories of the proper design. The SUPPLIER is responsible of the following : - manufacture, procurement of his components, supply, factory acceptance test, packing, - when applicable : transportation, site acceptance tests, precommissioning, commissioning, start-up of all equipment and materials include in the supply, - the warranties against faulty design and construction of the generator set, - the performance warranties for the consumption of one generator set shall be not greater than the following table.

Load 50 %

60 %

65 %

70 %

75 %

80 %

85 %

90 %

95 % 100 %

100

100

100

100

100

100

100

100

100

100

5

5

5

5

5

5

5

5

5

5

Total a + b

105

105

105

105

105

105

105

105

105

105

c) Not acceptable consumption in %

2.5

2

2

2

1.5

1.5

1.5

1

1

1

Total not acceptable

107.5

107

107

107

106

106

106

a) Typical value b) Acceptable in % as per ISO

106.5 106.5 106.5

The calcul of the consumption of gas shall be based on 85.5 % of methane

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8.1

WARRANTIES AGAINST FAULTY DESIGN The availability shall be 97 %. However, the following shall be applicable, in case of repetitive faults, without extra cost. The consequences on repetitive fault shall be as per the following table : Number of fault

Consequences

For all parts of the gas engine

6 identical faults per year or 12 faults per year during period of warranties

Replacement of the complete engine

For all electrical parts of the gas engine

6 identical faults per year or 12 faults per year during period of warranties

Replacement of all the electrical parts

For the generator

6 identical faults per year or 12 faults per year during period of warranties

Replacement of the complete generator

For the output breakers

6 identical faults per year or 12 faults per year during period of warranties

Replacement of the breaker

For the PLC's

6 identical faults per year or 12 faults per year during period of warranties

Replacement of all the PLC's, by up graded material

For the control cabinets

6 identical faults per year or 12 faults per year during period of warranties

Replacement by up graded material

6 identical faults per year or 12 faults per year during period of warranties

Replacement by up graded material

For the general

8.2

synchronous

installation

in

PERIOD OF WARRANTIES The periods of warranties are per the following : - Duration as per purchasing conditions or 2500 hours (500 h of operation per year) whichever occurs the first. This duration applies to all parts : - gas engine parts, - synchronous generator parts, - PLC, - control panel.

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The warranty shall include defective parts, replacement, instructions and transportation of parts from SUPPLIER 's place to site without extra cost. Oil and water filling shall not be considered. The warranties are not applicable on the synchronous generator and on the breakers, in case of short-circuit current due to an external fault.

9.

QUALITY CONTROL The SUPPLIER shall implement a Quality assurance Program in accordance with ISO 9001. This Quality assurance program shall be submitted to CONTRACTOR for approval in writing. SUPPLIER's general Quality assurance and Quality Control Procedures shall be available at the time requested in the requisition. They shall include namely the Quality Objectives. SUPPLIER shall submit the details of the proposed Quality Assurance Program to be followed for the work. It shall include all raw materials, active and passive components, fabricated assemblies, wiring, interconnections, enclosures, and software. SUPPLIER shall obtain and forward the Quality Assurance Program for equipment / work / software supplied by his sub-suppliers. CONTRACTOR may assign quality control personnel to SUPPLIER's manufacturing facilities / offices, who will work with SUPPLIER's quality control personnel in witnessing tests and control measures. CONTRACTOR representative shall have the right to inspect and test each piece of equipment at all stages of production and commissioning of the system. The inspection and testing shall include but not be limited to raw materials, components, sub-assemblies, prototypes, produced units, guaranteed performance specifications, software, etc. During all inspection periods, SUPPLIER shall provide all items necessary for CONTRACTOR's quality control personnel. These items include space, test equipment, and SUPPLIER's quality control and technical personnel for consultation and for test performance. CONTRACTOR's representative shall have free access and entry to any parts of SUPPLIER's manufacturing facility as it relates to the production of the equipment / work / software provided under this specification.

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It shall be explicitly understood by all parties, that under non circumstances, any approval of CONTRACTOR representative shall relieve SUPPLIER of responsibility for material, design, quality assurance and guaranteed performance of the equipment / work / software supplied under this specification. SUPPLIER shall notify to CONTRACTOR's representative of the date equipment / work/ software is ready for testing. Notification, required manuals, approved drawings, test procedures and other pertinent documents shall be made available in sufficient time to allow contractor's representative to prepare for participation in the test.

10.

OTHER INFORMATION

10.1

CABLES SPECIFICATION AND PROCUREMENT All electrical cables shall be specified by SUPPLIER (see paragraph 5.7). Power cables which have one end in the package and the other end outside of the package such as generator cables, cooler fan cables, neutral cable, etc., shall be specified (quantity and quality, see paragraph 5.6.1) by SUPPLIER and procured by CONTRACTOR. All inside package cables, specifically control cables, will be specified and procured by the SUPPLIER (SUPPLIER's scope of supply) and installed by others (i.e. by CONTRACTOR's subcontractor along with the equipment itself).

10.2

EARTHING SYSTEM The TNC-S scheme shall be used (20/0.4 kV transformers). The neutral point of generator shall also be directly connected to the earth. The maximal resistance value of the electrical earth mat will be no more than 5 ohms. The earthing system will be built by others.

10.3

FIRE AND GAS DETECTION Out of scope. However, the SUPPLIER shall define the fire and gas detection required in order to protect the generator set as an option.

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11.

APPENDICES APPENDIX 1 -

GAS ENGINE AND FOR S3 STATION

GENERATOR

DATA

SHEET

APPENDIX 2 -

GAS ENGINE AND FOR S6 STATION

GENERATOR

DATA

SHEET

APPENDIX 3 -

GENERATOR BUILDING DRAWING

APPENDIX 4 -

MAP

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APPENDIX 1

GAS ENGINE AND GENERATOR DATA SHEET FOR S3 STATION No. RC291.DS.300.0300.0001 SUPPLIER is requested to fully fill out data sheets even if some information are already stated elsewhere.

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APPENDIX 2

GAS ENGINE AND GENERATOR DATA SHEET FOR S6 STATION No. RC291.DS.600.0300.0001 SUPPLIER is requested to fully fill out data sheets even if some information are already stated elsewhere.

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APPENDIX 3

GENERATOR BUILDING DRAWING S3 STATION : No. C-022-C-203551 S6 STATION : No. D-022-C-203978

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APPENDIX 4

GEOGRAPHIC MAP

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