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SPECIFICATION NO. 1002CONTROL AND PROTECTION EQUIPMENT

1002-1. General Requirements1002-2. Information Required of the Bidder1002-3. Codes and Standards1002-4. Materials and Workmanship1002-5. Special Climatic Treatment1002-6. Arrangement1002-7. Details ofConstruction

1002-7.1 Duplex Main Control Boards1002-7.2 Dual Main Control Boards1002-7.3 Control Switchboards.1002-7.4 Swing Rack Type Protective Relay Switchboards1002-7.5 Interposing Relay Panels1002-7.6 Transducer Panels1002-7.7 Marshalling Panels1002-7.8 Hinged Synchronizing Panels1002-7.9 Rotating Synchronizing Panels.

1002-8.1002-9.1002-10.1002-11.1002-12.1002-13.

1002-14.1002-15.1002-16.SPE.1 002 Rev.6

Drawings and Data RequirementsGround BusesWiringPower Supply DisconnectsTerminal Block, Wire and Device DesignationsInstrument Transformer Secondary Ratings and StationService Power Supply RatingsAuxiliary TransformersIndicating LampsLight Boxes

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1002-17. Test Switches1002-18. Terminal Blocks1002-19. Nameplates1002-20. Symbols and Mimic Buses1002-21. Control and Instrument Switches1002-22. Indicating Instruments1002-23. Grid TOU Energy Meters1002-24. Universal Telecounting Instruments1002-25. Fast Receipt Printer1002-26. Transducers1002-27. Transformer Tap Position Transducers1002-28. Relays

1002-28.1 Synchro-Check Relays (25 + 27/59)1002-28.2 Transformer Differential Relays (87K)1002-28.3 Bus Differential Relays (87B)1002-28.4 Auxiliary Tripping and Lockout Relays

(86K, 86B, 86DTT, 86BF) 1002-28.5 Non-Directional Overcurrent Relays

(51T/51TG, 51/51G, 51L151LG).1002-28.6 Non-Directional Overcurrent Ground Relays (51GBl)1002-28.7 Non-Directional Overcurrent Ground Relays (51GB2)1002-28.8 Auxiliary Tripping Relays (51/51X,51151GX,51L151LX)1002-28.9 Loss ofDC Alarm Relays with Special Provision

for Slow Dropout (27XB, 27XR) 1002-28.10 Loss-of-Potential Alarm Relays (27XM) 1002-28.11 Residual Overvoltage Relays (59N). 1002-28.12 Automatic Voltage Transfer Relays (27VTS)

1002-29. 230 kV Transmission Line Protection

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1002-29.1 Relay Line Terminal Utilizing Distance Protection 1002-44 1002-29.2 Relay Line Terminal Utilizing Current Differential 1002-53

and Distance Protection. 1002-30. 230 kV Transformer Protection 1002-56 1002-31. 230 kV Bus Protection 1002-57 1002-32. 230 kV Breaker Failure Protection 1002-57 1002-33. 230 kV Direct Transfer Tripping System 1002-59 1002-34. 115 kV Transmission Line Protection 1002-59 1002-35. 115 kV Transformer and Local Line Protection 1002-63 1002-36. 115 k V Bus Protection 1002-64 1002-37. 115 kV Breaker Failure Protection 1002-64 1002-38. Auxiliary and Control Relays 1002-64 1002-39. Interposing Relays 1002-65 1002-40. Annunciators 1002-65 1002-41. Size of Drawings 1002-68 1002-42. Factory Tests 1002-68 1002-43. Finishing and Painting 1002-69 1002-44. Spare Parts List 1002-69 1002-45. Tools and Accessories 1002-69

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SPECIFICATION NO. 1002

CONTROL AND PROTECTION EQUIPMENT

1002-1. General Requirements. The equipment under this Specification will be used at2301115 kV, 230/69 kV and 115 kV substations ofEGAT power system. Theequipment 'will be extended to the existing equipment or newly constructed asindicated on the drawings for each substation. The Contractor shall furnish,assemble and wire all instruments, control and instrument switches,annunciators, protective relays and other equipment mounted on the panels.All equipment must meet the requirements as defined in this Specification.

1002-2. Information Required of the Bidder. The Bidder shall submit with his bid thename of the manufacturer, and the type or model of the equipment offered.Technical data, descriptive information, drawings and catalogs showing allsignificant characteristics and details, principles of operation, generalarrangement and dimensions, shall also be included to enable EGAT todetermine the suitability of the equipment for its purposes. Where ProposalData Forms are provided, the Bidders shall enter all information as directed.These requirements from the Bidders are very essential, and failure of anyBidder to comply with these requirements may constitute reasonable cause forEGAT to cancel a part or all the Proposal from that Bidder.

1002-3. Codes and Standards. All equipment, materials, fabrication and testing underthis Specification shall conform to the latest applicable standard specificationsand codes contained in the following list, or to equivalent applicable standardspecifications and codes established and approved in the country ofmanufacturer of the equipment. Where standards are mentioned by name,equivalent applicable standards may be used.

IEEE Institute ofElectrical and Electronic EngineersANSI American National Standards Institute IncorporatedNEMA National Electrical Manufacturers' AssociationNEC National Electrical CodeASTM American Society ofTesting MaterialsIEC International Electrotechnical Commission

Any details not specifically covered by these standards shall be subject to theapproval of EGAT. In the event of contradictory requirements between suchstandards and this Specification, the terms of the Specification shall govern.

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1002-4. Materials and Workmanship. All materials shall be new and shall be the bestavailable for the purpose for which used, considering strength, durability, lifeexpectancy, operational reliability, suitability and ease of maintenance for theintended service and best engineering practice. Workmanship shall be of thehighest grade, and in accordance with the best modern standard practice.

1002-5. Special Climatic Treatment. All materials shall be selected and especiallytreated so that they will be satisfactory for use under the following climaticconditions:Ambient temperature range 5C to 45C Relative humidity 95%

The equipment, however, shall meet the ANSIIIEEE C37.90 ambienttemperature requirement of 55C.

1002-6. Arrangement. The main control boards shall be of either the duplex type,enclosed type, dual type or swing rack type as required and specified for eachsubstation in the drawings entitled : "Main Control Board Equipment Layout".The main control boards under this Specification shall be designed for thecontrol and protection as indicated by the drawings and bill of materials, and asspecified herein. Protective relays and their associated auxiliary relays shallperform the functions as sho\\-n on the drawing entitled : "Protective DeviceFunctions", for each substation. The Contractor shall furnish any necessarycontrol and protection functions indicated, mounted and wired as required,whether such devices are itemized herein or not.Any modifications to the arrangement indicated or arrangement of equipmentnot sho\\-n shall be subject to the approval of EGAT.The construction details of the main control boards shall be as sho\\-n onDrawing No. TP-E-IO.l.No auxiliary equipment or any other accessories except lighting fixtures shallbe mounted on the ceiling inside switchboards and panels. The equipmentinstallation shall facilitate operation and maintenance processes, permitoperation in close proximity to other live equipment and provide convenienceand safety for operators.

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1002-7. Details of Construction. Each switchboard section, each interposing relaypanel, each transducer panel and each marshalling panel shall consist of anassembly made from not less than No. 2.5 mm leveled sheet steel and formedsteel members as required to form a rigid self-supporting structure. No buttsurface joints shall be made on the outside surfaces of switchboards and panels.No holes or fasteners shall be visible as viewed from the front of the panels.Switchboards and panels shall be designed without any permanent bottombraces and the bottoms shall be closed with floor channel closing plates thatshall be strong enough to withstand the weight of operators. Switchboards andpanels shall be furnished with channel bases. The front and rear panels of theswitchboards and the panels shall have bent angle or flange edges with anoutside radius not exceeding 10 mm.

1002-7.1 Duplex Main Control Boards. The duplex main control board shallconsist of basic panel assemblies placed back-to-back at sufficientdistance to provide a tunnel-type walkway between the assemblies.Bolted on floor channels, top sheets, wiring trays, left and right endtrims with access doors shall be provided to form a complete duplexcontrol board with uninterrupted walkway running the entire length ofthe structure. The access doors shall be equipped with lock, latchesand fully concealed hinges, and with handles for opening from theexterior and interior. End trims with access doors shall be readilyremovable so as to permit future boards to be installed at both ends.Hinged panels shall be provided on the rear of panels for mountingauxiliary equipment. Provision shall be made rigidly securing I I Iplace all hinged panels on which equipment is mounted.The duplex main control board panel size shall be 1,830 mm deep andthe height shall be 2,300 mm plus a 40 mm channel base. Panelwidths shall be as indicated on Drawings entitled : "Main ControlBoard Equipment Layout", for each substation.There shall be furnished in the duplex control boards one fluorescentlamp per duplex board section mounted inside at the top of the controlboard for interior lighting with two 3-way toggle switches, onelocated on the inside of each end trim near the access door. Duplexreceptacle outlets of single-phase, 2-pole, 3 wire grounded type rated15 A at 250 V shall be furnished, one on each end trim near theaccess door, and additional outlets evenly distributed throughout the

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board interior, so that the outlets will not be more than 5 panels apart.The lights and receptacle outlets shall be completely wired forconnection to 230 V, single-phase, 50 Hz, AC source furnished byEGAT.Dual Main Control Boards. Each dual main control board shallconsist of basic panel assemblies placed back-to-back and necessarybolted-on floor channels, top sheet, wiring trays and enclosed at bothends. The front panel shall be hinged panel equipped with handle,lock, latches and fully concealed hinges. The rear panel shall befixed. Each end trim shall be readily removable so as to permit futureboard to be installed at both ends.

Hinged panels shall be provided on the rear of rear panels formounting auxiliary equipment. Provision shall be made for rigidlysecuring in place all hinged panels on which equipment is mounted.

The dual control board panel size shall be 1,000 mm deep and theheight shall be 2,300 mm plus a 40 mm channel base. Panel widthsshall be as indicated on Drawings entitled : "Main Control BoardEquipment Layout", for each substation.

There shall be furnished in the dual control boards one fluorescentlamp per control board section for interior lighting. Each controlboard section shall be provided with a light cut-off switch on thehinged front panel, so that the panel light is automatically energizedwhen the panel is open and automatically extinguished when thepanel is closed. One receptacle outlet of single-phase, 2-pole, 3 wiregrounded type rated 15A at 250 V shall be furnished inside percontrol board section. The light and the receptacle outlet shall becompletely wired for connection to 230 V, single-phase, 50 Hz, ACsource furnished by EGAT.Control Switchboards. Each control switchboard shall compnsesections mounted so as to form a straight line appearance or a roughsemi-circle around the operator desk as required and specified foreach substation in the drawings entitled : "Control SwitchboardEquipment Layout". Each section shall appear as an enclosed typeswitchboard when viewed from outside the section.

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Each enclosed switchboard assembly shall consist of basic panelassemblies, and necessary bolted-on floor channels, top sheets, andrear enclosure covering the back. Access to each switchboard sectionshall be provided by two hinged flat rear doors. The access doorsshall be equipped with locks, latches, fully concealed hinges andhandles.

Both sides of each control switchboard section shall be open exceptfor the two end sections; the left side of the left end section and theright side of the right end section shall be enclosed.

End trims of the two end sections shall be readily removable so as topermit future control boards to be installed at both ends.Mounting brackets as required shall be arranged on the rear of panelsfor mounting auxiliary equipment. They shall be located to allowaccess to the back of the equipment mounted on the front of thepanels.If the auxiliary equipment mounted on the brackets prevent access tothe rear of the equipment on the front of the panels, then mountingbrackets shall not be acceptable and the auxiliary equipment shall bemounted on hinged panels instead.

The enclosed switchboard panel size shall be 610 mm deep. Theheight, channel base, and panel width shall be as indicated on thedrawings entitled : "Control Switchboard Equipment Layout" for eachsubstation.

The detail of each enclosed switchboard section shall be as shown onDrawing No. TP-E-lO.l.Blank removable filler panels shall be provided between the controlswitchboard sections for continuity as shown on the drawing entitled;"Control Switchboard Equipment Layout".The Contractor shall provide all wmng and wmng connectionsbetween the individual sections.

There shall be furnished in the control switchboard one fluorescent

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lamp per enclosed switchboard section, mounted and wired inside thetop of the switchboard for interior lighting and controlled by a switchmounted inside and near the rear door. Two duplex receptacle outletsshall be furnished, one on the left end section and one on the right endsection, mounted and wired in a convenient location near the hingedrear doors. The lights and duplex receptacle outlets will be connectedto the 230 V single-phase, 50 Hz, AC source furnished by EGAT.

Each basic panel assembly for duplex and dual main control boardshall be a self-contained unit with factory wiring complete toconveniently located terminal blocks for the incoming cables. Eachshall have vertical side members, which include vertical raceways andraceway covers for factory wiring, and shall be bolted to the right andleft sides of the basic panel. These side members shall provideseparate raceways to house, protect, and conceal the incoming cablesand interpanelleads. Terminal blocks shall be furnished and mountedin vertical rows on both sides of the basic panel assembly.

Suitable wire slots with rubber bushings in vertical rows on both sidesof the basic panel assembly near terminal blocks shall be provided foroutgoing leads.

Each basic panel assembly shall be readily removable withoutdisturbing the control switchboard assembly.

Swing Rack Type Protective Relay Switchboards. Each protectiverelay switchboard shall be of the swing rack type, consisting of aswing rack assembly, top sheet and rear enclosure covering the backand ends of the entire structure. Each panel shall have a front coverdoor equipped with a glass window for viewing all targets andindications. The panel door shall be equipped with locking handle,latches, fully concealed hinges, and complete with screened louvers atthe top and bottom.

The panel door shall be hinged on the right hand side, front view. Therelay rack assembly shall be hinged on the left hand side, front view.Each panel shall be designed for mounting standard 19-inch widerack-mounted relays.Each relay rack assembly shall be arranged to swing through not less

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than 120 degrees from closed position to allow easy access to theback of the equipment mounted on the rack and to the interior of thepanel.

Each switchboard shall be provided with a vertical wmng ductcomplete with a cover for factory wiring and a vertical raceway and araceway cover to house, protect, and conceal the incoming cables.The vertical wiring duct and the vertical raceway shall be arranged asshown on Drawing No. TP-E-IO.l.Terminal blocks shall be furnished and mounted in vertical rows onthe back inside the switchboard and located between the wiring ductand the raceway as shown on the above drawing. All wiring whichconnects to the external circuits shall terminate on these terminalblocks. Provision shall be made for interconnection of wiringbetween switchboard sections. The terminal blocks used fortermination of the Vviring to RTU and FRS shall be knifedisconnecting type.Mounting brackets, as required, shall be arranged for mounting andwiring auxiliary equipment. They shall be located to allow access toterminal blocks mounted on the back inside of the switchboard.Each switchboard shall be provided with cable entrances at thebottom of the switchboard.Panel openings of the swing rack assembly not utilized by equipmentshall be covered by cover plates.

The switchboard size shall be 800 mm wide, 610 mm deep and theheight shall be 2,300 mm plus a 40 mm channel bases.There shall be furnished in the protective relay switchboards onefluorescent lamp per switchboard section mounted inside at the top ofthe switchboard for interior lighting with one toggle switch locatedinside the switchboard. One receptacle outlet of single-phase, 2-pole,3 wire grounded type rated 15A at 250 V shall be furnished inside theswitchboard. The light and the receptacle outlet shall be completelywired for connection to 230 V, single-phase, 50 Hz, AC sourcefurnished by EGAT.

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1002-7.5 Interposing Relay Panels. Each interposing relay panel shall beprovided with the interposing relays for substation control, indication,and annunciation. All relays shall be furnished complete with integralaccessories, mounted and completely wired.In general, control signals to the switchyard shall be first connected tothe interposing relays before being connected to the relevantswitchyard equipment.

Interposing relay panels shall be furnished and designed inaccordance with Drawing No. TP-E-10.2. Each panel shall be anassembly enclosed at top and sides and shall have front and rearaccess doors for access to both sides of the center mounting plate.Interposing relays shall be mounted on both sides of this center plate.The front and rear shall each be provided with two hinged flat doors.Access doors shall be equipped with locks, latches and fullyconcealed hinges.

Each panel shall be 900 mm wide, 1,000 mm deep and the heightshall be 2,300 mm plus a 40 mm channel base.

Each panel shall have vertical side members, which include verticalraceways and raceway covers for factory wiring, and shall be boltedto the right and left sides of the panel. These side members shallprovide separate raceways to house, protect, and conceal theincoming cables and interpanelleads.

Terminal blocks shall be furnished and mounted in vertical rows onboth sides of the panel. The number of vertical rows and thearrangement of terminal blocks shall be in accordance with theDrawing No. TP-E-IO.2. All wiring which connects to the externalcircuits shall terminate on these terminal blocks.There shall be furnished in the interposing relay panel one fluorescentlamp per section for interior lighting. Each interposing relay panelsection shall be provided with a light cut-off switch on the hingedfront panel, so that the panel light is automatically energized when thepanel is open and automatically extinguished when the panel isclosed. One receptacle outlet of single-phase, 2-pole, 3 wire grounded

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type rated 15A at 250 V shall be furnished inside per interposing relaypanel section. The light and the receptacle outlet shall be completelywired for connection to 230 V, single-phase, 50 Hz, AC sourcefurnished by EGAT.Each panel shall be provided with cable entrance at the bottom of thepanel.Transducer Panels. Each transducer panel shall be provided withtransducers for substation metering and for use with the remoteterminal unit (RTU). All transducers shall be furnished, mounted andcompletely wired.Each panel shall be designed in accordance with Drawing No. TP-E10.2. Each panel shall be an assembly enclosed at top and sides andshall have front and rear access doors for access to both sides of thecenter mounting plate. Transducers shall be mounted on both sides ofthis center plate. The front and rear shall each be provided with twohinged flat doors. Access doors shall be equipped with locks, latchesand fully concealed hinged.

Each transducer panel shall be 900 mm wide, 1,000 mm deep and theheight shall be 2,300 mm plus a 40 mm channel base.Each panel shall have vertical side members, which include verticalraceways and raceway covers for factory wiring, and shall be boltedto the right and left sides of the panel. These side members shallprovide separate raceways to house, protect, and conceal theincoming cables and interpanel leads.Terminal blocks shall be furnished and mounted in vertical rows onboth sides of the panel. The number of vertical rows and thearrangement of terminal blocks shall be in accordance with DrawingNo. TP-E-IO.2. All wiring which connect to the external circuits shallterminate on these terminal blocks.Each panel shall be provided with cable entrance at the bottom of thepanel.

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Marshalling Panels. There shall be classified into three types asfollows : one type shall be required for tennination of all cablesbetween the remote tenninal unit (RTU) and the other equipment; onetype shall be required for tennination of all cables between the faultrecording system (FRS) and the other equipment, one type shall berequired for tennination of all cables between interposing relay paneland protective relay switchboards, circuit breaker and motorizedoperated disconnecting switch and the other shall be required fortennination of all cables between the teleprotection equipment and theother equipment.

Each panel shall be designed in accordance with Drawing No. TP-E10.3. Each panel shall be an assembly enclosed at top and sides andshall have front and rear access doors for access to both sides of thecenter mounting plate. Tenninal blocks shall be mounted on bothsides of this center mounting plate. The front and rear shall each havetwo hinged flat doors. Access door shall be equipped with locks,latches and fully concealed hinges.

Each marshalling panel shall be 900 mm wide, 1,000 mm deep andthe height shall be 2,300 mm plus a 40 mm channel base.

Each panel shall have vertical side members, which include verticalraceways and raceway covers for factory wiring, and shall be boltedto the right and left sides of the panel. These side members shallprovide separate raceways to house, protect, and conceal theincoming cables and interpanelleads.

Tenninal blocks shall be mounted in vertical rows on both sides ofthe center mounting plate. The number of rows and the arrangementof these tenninal blocks shall be in accordance with Drawing No. TPE-1O.3. Tenninal blocks shall be knife disconnecting type.Each panel shall be provided with cable entrance at the bottom of thepanel.

Panel space of the switchboards and panels, not utilized by equipmentshall remain clear for addition ofpossible future equipment.

Each section of switchboards, each interposing relay panel, each

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transducer panel and each marshalling panel shall be designed topermit easy separation and re-assembly for convenience duringshipment, transportation and installation.

Where switchboards and panels to be supplied are extensions toexisting switchboards or panels, the Contractor shall be advised ofany existing mounting, clamping, bolting, access, dimensional, orfinishing requirement and shall be responsible for ensuring that theswitchboard or panel extension conforms to these requirements.

1002-7.8 Hinged Synchronizing Panels. Each hinged synchronizing panel shallbe fabricated from not less than 2.5 mm leveled sheet steel and shallbe approximately 170 mm wide, 550 mm high, and 200 mm deep. Ifspecified, each hinged synchronizing panel shall be furnished andshall constitute a part of each duplex main control board assembly.Each shall be designed to swing back in line with the other panelswhen not in use to present straight line appearance. Each shall bereadily removable and re-installed when future control boardinstallation is required. The rear sheet shall be readily removable foraccess to the instruments and wiring in the panel.

Each panel shall be furnished, mounted and completely wired withthe following equipment:

1002-7.8.1 One - Twin indicating voltmeter, 0-150 V scale, 150 V coil, 50Hz, 144 mm square face, for incoming and runningpotential.

1002-7.8.2 One - Twin indicating frequency meter, 48-52 Hz scale, 115V, 144 mm square face, for incoming and runningfrequency.

1002-7.8.3 One - Synchroscope, 144 mm square face.1002-7.8.4 Two - Synchronizing lamps, 15 W each, clear, to be connected

to indicate synchronism.

Each indicating instrument shall be In accordance with therequirements ofArticle 1002-22. except the size shall be as specified.

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1002-7.9 Rotating Synchronizing Panels. One rotating synchronizing panelshall be furnished with each control switchboard assembly. Each shallbe designed to be recessed into the control switchboard panel so as topresent a flush appearance and shall be capable of being draw outfrom the panel a sufficient distance to allow rotation over 180 degreesfor viewing from all positions in front of the control switchboard.Each panel shall be fabricated from not less than 2.5 mm leveledsheet steel.

Each panel shall be furnished, mounted and completely wired withthe same equipment as Article 1002-7.8.

1002-8. Drawings and Data Requirements. The Contractor shall submit for approvalthe following drawings and data, sufficient to demonstrate fully that theequipment to be furnished will conform to the requirements and intent of thisSpecification.

1002-8.1 Metering and Relaying Diagrams. The metering and relaying singleline diagrams of each substation are included in this Specification.The Contractor shall supply single line diagrams showing conformitywith the specified requirements indicating clearly changesnecessitated by the proposed equipment.

1002-8.2 Three Line Diagrams. Each three line diagram shall show voltageand current connections to all metering and relaying equipment.

1002-8.3 AC Schematic Diagrams. All diagrams shall show AC connectionssuch as AC supply to all metering and relaying equipment,synchronizing schematic diagrams, etc.

1002-8.4 DC Schematic Diagrams. All diagrams shall show the DC wiring forcontrol, indication, annunciation, protection, etc., arranged in aschematic form and shall include the necessary wiring of all powercircuit breakers that received a trip signal from the protective relaysthat are listed in the drawings, "Protective Device Functions", foreach substation.

For the annunciator, the Contractor shall furnish enough informationin detail to understand complete operation of the annunciator system.It shall be furnished with a description of the operation of each

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component and an explanation of the operational sequence of eachcomponent in regard to the overall annunciator scheme. Allcomponents shall show internal schematic diagrams and circuit boardillustrations.

Logic Diagrams. Logic diagrams shall show details of the logiccircuits for each individual relay. These diagrams shall be requiredfor the system as a whole as well as for each individual relay andcomponent.

Wiring Diagrams. Wiring diagrams shall show connections frompoint to point for all control board and protective relay equipment. Allthe wiring connections to the equipment on anyone panel shall beshown on the same drawing. Inter-panel connections shall be properlyidentified on both the incoming and outgoing panel drawings.

Wiring list or tabular type wiring diagrams shall not be accepted.

Control and Instrument Switch-Switch Position Tabulation Diagrams.Switch position tabulation diagrams of control and instrumentswitches shall show terminal arrangement, escutcheon plate andcontact tabulation. On each schematic diagram where switch contactsare shown, switch position tabulations for the indicated switches shallbe included somewhere on the same drawing.

Nameplate Schedule Diagrams. A nameplate schedule diagram foreach substation shall show designations on all nameplates. Thewording of each nameplate designation may be revised to satisfyphysical limitations subject to the approval ofEGAT.

Annunciator Schedule Diagrams. An annunciator schedule diagramfor each substation shall show annunciator designations for all theannunciator points including spares provided. The wording of eachannunciator designation may be revised to satisfy physical limitationssubject to the approval ofEGAT.

Equipment Layout Diagrams of Switchboards and Panels. Eachequipment layout diagram shall show dimensions, location, andgeneral layout of all panels and all equipment to be located on thepanels.

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1002-8.11 Switchboard and Panel Construction. The Contractor shall providefor approval the general assembly drawings including dimensions,details of arrangement plan and section and floor plan complete withanchor both setting plan.

1002-8.12 Bill of Materials. Enlisting major equipment to be mounted on theswitchboards and panels, if not otherwise indicated elsewhere in thisSpecification, the bill of materials shall cover only the majorequipment, or such equipment as will require particular informationfrom the Bidder. It is to be understood that, all other associatedauxiliary equipment and accessories, although not listed in the bill ofmaterials, but necessary for the complete and sound functions of theswitchboards and panels as described in this Specification, and asgenerally accepted as the applicable standards, shall be furnished bythe Contractor. The Bidder at the time of bidding shall, to the best ofhis knowledge, furnish the list showing quantity and details of all theequipment he intends to supply.The switchboards and panels proposed shall give the best optimumresult as called for in this Specification, and as basically required bystandard electrical engineering practice.The Contractor, after having finished the design of the switchboardsand panels shall submit EGA T for approval all the design detailsincluding individual equipment of the switchboards and panels, and toall associated equipment in the substation, and showing overallfunctions of the schematic diagrams. EGA T shall then review theschemes, and should any proper functions required in thisSpecification or required for sound engineering practice of theswitchboards and panels entail necessary modifications to the schemeor additional equipment other than those originally proposed by theBidder at the time of bidding, EGAT will return the scheme to theContractor to carry out the modification required without any extracharge to EGAT.

1002-9. Ground Buses. A 6 mm by 25 mm cross-section bare copper ground bus shallbe provided at the bottom of each switchboard panel and each panel, to whichthe metallic cases of meters, instruments, relays and grounding circuits of allother equipment shall be connected. The grounding buses shall be solidly

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bolted to the steel framework so as to make good electrical contact. Solderlesslugs or terminals shall be provided on the ground buses for terminating No. 4/0A WG stranded copper ground cables from the substation grounding system.

1002-10. Wiring. All wiring used within the main control boards, control switchboards,protective relay switchboards, metering panels, interposing relay panels,transducer panels, and marshalling panels shall conform to the NEC andNEMA standards and shall be rated 600V, tinned, stranded copper switchboardwire, polyethylene insulated and in gray color. All wiring shall be 1.5 mm2except for current transformer circuits which shall be 2.5 mm2 All hingedwiring shall be extra flexible. After assembly, all control wiring shall be givena dielectric test of 1,500 V between live parts and ground, and betweenopposite polarities. Internal wiring of each basic panel assembly and each panelshall be neatly and carefully installed in suitable wiring ducts with removablecovers and complete to conveniently located terminal blocks for connecting toincoming and outgoing leads.

Before connected to the terminal blocks, all wiring shall be terminated withblade-type cable rugs. Multiple wires in one cable rug shall not be acceptable.The cable rugs shall perfectly match the terminal blocks and shall be pluggedin without any modifications to the cable rugs.

The terminal arrangement shall group all leads for each particular function tofacilitate connections to the incoming and outgoing cables. The arrangementshall be subject to the approval of EGAT. Terminals for each CT circuit shallbe grouped together and separated from terminals for other CT circuits. At least25 per cent spare terminals shall be provided on each group of terminal blocksfor terminating spare conductors in control cables and for future use, however aminimum of one spare terminal shall be provided on each group of terminalblocks.Wiring between inter-panels shall be made and routed through verticalraceways of the switchboards and panels. Such wiring shall also be terminatedand reconnected in terminal blocks in order to permit convenient separation ofindividual panels or panels.

All incoming and outgoing cables shall enter the switchboards and the panelsthrough cable slots in the floor underneath the switchboards and the panels.Splices or tee connections shall not be permitted in control wiring or

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instrument leads.Any control boards or panels that are split for shipment shall have terminalblocks adjacent to the split and shall be provided with wiring required tointerconnect the split units.

1002-11. Power Supply Disconnects. Power supplies for panel mounted devices shall beprovided with miniature circuit breaker (MCB) connected to isolate the devicesfrom power supplies in the tripped or open condition. MCB shall be locatedwithin the panels. Engraved nameplates shall be installed beside each set ofMCB for identification.Except for voltage supply of the potential transformer secondary which suppliesto primary pilot relaying in Article 1002-11.3.3, 1002-11.3.4 and 1002-11.3.6,sliding switch bridge terminal block shall be required instead ofMCB.

Power supply to each nature of control circuit and the potential transformersecondary supply to each metering circuit shall be separated and required MCBprotection provided, including, but not limited to the following:

1002-11.1 DC Control Circuits.

1002-11.1.1 Control circuit, including relay trip circuit, for each powercircuit breaker.

1002-11.1.2 Control circuit for each disconnect switch1002-11.1.3 Control circuits for electrically operated mImIC disconnect

devices.1002-11.1.4 Two control circuits for each 230 kV line protective relaying

scheme, one for pilot relaying scheme and the other for backuprelaying scheme.

1002-11.1.5 Control circuit for each 115 kV line protective relaying scheme

1002-1l.1.6 Transformer differential relay control circuit

1002-11.1.7 Transformer overcurrent relay control circuit

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1002-11.1.8 Local line overcurrent relay control circuit

1002-11.1.9 Each bus differential relay control circuit

1002-11.1.10 Control circuit for each set ofbreaker failure relaying scheme 1002-11.1.11 Annunciator control circuit

1002-11.1.12 Auxiliary supply to universal telecouting instrument

1002-11.1.13 Any other individual control circuit

1002-11.2 AC Supply Circuits.

1002-11.2.1 Power supply for the illumination and Outlet

1002-11.2.2 Any other individual supply circuit

1002-11.3 Potential Transformer Secondary Supply Circuits.

1002-11.3.1 Potential circuit for each set ofmetering equipment

1002-11.3.2 Potential circuit for synchronizing

1002-11.3.3 Potential circuit for 230 k V pilot relaying scheme

1002-11.3.4 Potential circuit for 230 k V backup relaying scheme

1002-11.3.5 Polarizing circuit for each backup ground relay 1002-11.3.6 Potential circuit for 115 kV line relaying scheme 1002-11.3.7 Potential circuit for each synchro-check relay scheme

1002-11.3.8 Any other individual potential circuit

Detail circuit arrangements and MCB protection shall be approved by EGA T at thetime approval drawings are submitted by the Contractor.

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1002-12. Terminal Block, Wire and Device Designations. Every point of terminal blockand wire shall be assigned a designation, with identical designation on eachcorresponding terminal block and wire. This same designation shall also beindicated in the schematic and wiring diagrams. As a rule, a designation willnot change until the wire is terminated or connected to other equipment. Allwiring shall be designated at both ends by printing on wire designation sleeves.

Wire designation shall be by permanent method unaffected by heat, solvents, orsteam, and not easily dislodged. Each designation on the terminal blocks shallbe machine-lettered, stamped, engraved or neatly marked with permanent inkon the removable marking strips provided for each terminal block.Approximately 20% of spare wire designation sleeves shall be furnished.Adhesive labels shall not be acceptable.

The name of ANSI standard device number of each device shall be marked onthe rear of the panels directly behind or adjacent to the corresponding device.

1002-13. Instrument Transformer Secondary Ratings and Station Service Power SupplyRatings. Ratings of instrument transformers and station service power supplywill be indicated in bill of materials, and except as otherwise specified, allequipment shall be designed and supplied to the following ratings:

System Frequency 50Hz

Potential Transformer 115 V Secondary Ratings

Current Transformer SA Secondary Ratings AC Station Service 400/230 V3 phase, 4 \\-ire, wyegrounded neutral

DC Station Service 125 V, ungrounded station batteryPower Supply for Substation EquipmentControl and Protection Circuits, InterposingRelay Control CircuitsCPT and CT ratios will be indicated in the drawings and bill of materials)

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t002-14. Auxiliary Transformers. Where auxiliary transformers are required for thecorrect operation of specific metering, relaying, and control equipmentfurnished under this Specification, the Contractor shall furnish such additionaltransformers as required without additional cost to EGAT.

1002-15. Indicating Lamps. All indicating and pilot lamp assemblies shall be of the lightemitting diode (LED), 125 V, switchboard type with color caps. The color capsshall be red, green, white, blue or yellow as required. All lamp bulbs shall beinterchangeable, and shall be replaceable from the front of the panels.

1002-16. Light Boxes. Each light box, for indication of energized line or bus, shall bethe light emitting diode (LED), switchboard type. Each light box shall have awhite translucent nameplate with machine-engraved, black letteringilluminated by the back light. Each nameplate shall be engraved in accordancewith the drawing entitled: "Main Control Board Nameplate Schedule".Each light box shall be 25 mm. high by 50 mm wide.All lamp bulbs shall be interchangeable, and shall be replaceable from the frontof the panels.

t002-17. Test Switches. Test switches shall be of the built-in type or separate type asspecified. Separate test switches shall be of the switchboard, back-connectedtype, finished in dull black for front-of-panel mounting. All test switches shallbe arranged to completely isolate the instruments from the instrumenttransformers and other external circuits and to provide means for testing eitherfrom an external source of energy or from the instrument transformers bymeans of multipole test plugs which shall be provided for the purpose. Asufficient number of test plugs to make a complete test on one meter,instrument, or relay shall be furnished for each type of test switch. All testswitches shall be arranged so that the current transformer secondary circuitscannot be open-circuited in any position while the test plugs or cover plugs arebeing inserted or removed.The internal contacts shall be normally sprung together by themselves tocomplete the circuit link.

Test switches and multipole test plugs shall be ABB, flexitest switches, typeFT-lor equivalent.

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1002-18. Tenninal Blocks. The main control boards, interposing relay panels, transducerpanels and marshalling panels shall be supplied with tenninal blocks fortennination of all wiring devices mounted in the switchboards and panels andall external circuits. The terminal blocks shall be of non-flammable, selfextinguishing, non-hygroscopic insulating material, rated for 600 V and shallconfonn to IEC 947-7-1 and IEC 947-1 standards. The tenninal blocks shall haveadequate current carrying capacity and shall be suitable for use in tropical climate.T enninals shall maintain good electrical, mechanical, chemical, and otherproperties even at operating temperature as high as 250C and shall haveexcellent mechanical strength and hardness; they shall be flexible but difficult tobend or break even applied with thread and torque from the connected wires.Insulating barrier between adjacent tenninal shall be integral part of the terminalblock. All tenninal blocks and tenninations shall be grouped according to circuitfunctions. Each tenninal block shall have removable white marking strip formarking circuit designation. One spare blank marking strip shall be furnishedwith each tenninal block. The tenninal blocks shall be well arranged in order thatthey permit safe wiring works on any tenninal while all adjacent terminals arelive.

The tenninal blocks provided for CT circuits shall be of the spring-loaded screwon type or screw-on type. The tenninal blocks provided for control, protectioncircuits and other circuits shall be of the spring loaded screw-on type, screw-ontype or screwless type. The screw-on type tenninals shall be designed in such away that after the tenninal block is unscrewed, the wire is still engaged to thetenninal block. The screwless type tenninals shall be designed to clamp the wireautomatically after releasing or withdrawing the screwdriver. The tenninal blocksprovided for marshalling panels shall be of the knife disconnect type.

The terminal blocks ofRTU circuits in each protective relay switchboard shall beof the knife disconnect type.All CT tenninals and distance relays' PT tenninals shall be provided with slidingswitch bridge and test socket screws. All CT and PT wires, as well as control andprotection circuits shall be tenninated with ferrules.

The tenninal blocks shall be sized and rated in accordance with current carryingcapacity ofwires. The tenninals for power and CT circuits shall be sized to accept2x6 rnrn2 conductors, and those for PT and control circuits shall be sized for 2x4rnrn2 conductors. The tenninals for alarm/status circuits, RTU circuits andmarshalling panel shall be sized for 2x2.5 rnrn2 conductors.

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The arrangement of all terminal blocks shall be such that incoming andoutgoing leads can be easily arranged for connections to terminals. Terminalblocks shall be located so that the accessibility to them will not be lessened byinterference from structural members or panel instruments. Ample space shallbe provided to terminal blocks for termination of all external circuits.

Terminal blocks for blank panels will not be required; however, mountingbrackets for these future blocks shall be provided.

1002-19. Nameplates. Nameplates shall be furnished and mounted by the Contractor.Each assembly, each piece of equipment mounted on an assembly, and eachpower and control circuit shall be provided with a nameplate. All nameplatesshall be of laminated plastic material, black on the surface with a white internallayer. Lettering shall be machine-engraved into the nameplate to form whiteletters against a black background. All panel mounted nameplates shall be inaccordance with the respective drawings showing nameplate schedule. Asample nameplate, showing the style of engraving to be used shall be submittedto EGAT for approval. Nameplate engraving shall be subject to the approval ofEGAT.

1002-20. Symbols and Mimic Buses. All symbols, devices and painted mimic buses, 10mm in width, shall be provided on the main control board to form single linediagrams which will simulate actual electrical connections as indicated on thedrawing entitled "Main Control Board Equipment Layout". Mimic disconnectdevices for disconnect switches shall be manually operated. Mimic disconnectdevices for line ground switches shall be electrically operated to automaticallyposition themselves in accordance with their respective line ground switches.The mimic buses shall be painted on the front of the panels with lacquer orenamel. Color ofmimic buses shall be as follows:

500 kV - Deep Black230 kV - Bright Red115 k V - Light Orange69 kV - Yellow33 kV - Dark Green22 kV - Blue11 kV - Brown

1002-21. Control and Instrument Switches. The control and instrument switches shall beof the multistage, rotary type, rated 600 V, 10 A, continuous duty, for both AC

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and DC services. Each contact shall be of the readily renewable, self-cleaningtype and shall be of the wipe-type. A rectangular front-of-panel escutcheonplate shall be furnished and engraved showing the switch position of controland instrument switches. The switch identification shall be engraved on theescutcheon plate, or if necessary, on a separate adjacent nameplate furnished bythe Contractor.

The types of control switch handles and colors preferred shall be provided asfollows:

Circuit breaker control switches - pistol grip (black)Discrepancy control switches - bar (black)Instrument selector switches - round notched (black)Synchronizing switches - oval removable (yellow or white)Trip transfer switches - oval (black)Recloser cut-off switches - oval (black)Raise-lower control - oval (black)Control selector switches - oval (black)Other cut-off switches - oval (black)

Details of individual control and instrument switches shall be as describedbelow. The total number of contacts and the total number of contactarrangements shall be adequate for their required functions but minimumnumber of contacts and contact arrangements shall be at least as shown onDrawing No. TP-E-9.1.

If the schemes for control, protection and other equipment as proposed by theContractor and approved by EGAT, require additional contacts than thoselisted in this Specification and shown in the above drawing, the Contractorshall furnish these extra contacts and contact arrangements without additionalcost to EGAT.

1002-21.1 Breaker Control Switches (CS). Each breaker control switch shall beof the momentary contact type, with fixed, modern, pistol grip, blackhandle with red and green mechanical target indicator to show the lastfunction of the switch. Each switch shall be furnished with separatelymounted red and green indicating lights. Breaker control switchesshall be suitable for use with rec10sing equipment.

1002-21.2 Discrepancy Control Switches (DCS). Each control switch shall be ofthe maintained contact type, with fixed, modern, white handle and

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1002-21.3

1002-21.4

1002-21.5

1002-21.6

1002-21.7

1002-21.8

1002-21.9

1002-21.10

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mechanical target engraved "On", "OtT', "Control On" and "ControlOff' . Each control switch shall be built-in with LED 125V DC.Synchronizing Switches (SS). Each synchronizing switch shall be ofthe maintained contact type, oval yellow or white handle removable at"OtT' position only to insure that only one set of potentials can beapplied to the synchronizing equipment at anyone time.

Recloser Cut-off Switches (79CO). Each recloser cut-off switch shallbe of the momentary contact type with fixed, modem, oval blackhandle.Ammeter Selector Switches (AS). Each ammeter selector switchshall be of the maintained contact and three independent circuit type,with fixed, modem, round-notched black handle.

Voltmeter Selector Switches (VS). Each voltmeter selector switchshall be of the maintained contact type with fixed, modem, roundnotched black handle.Trip Transfer Switches (43). Each trip transfer switch shall be of themaintained contact type, with fixed, modem, oval black handle. Thetrip transfer switch function is to permit the operation in order totransfer the tripping, reclosing, and synchronizing functions to the bustie breaker.Differential Cut-off Switches (87CO). Each differential cut-offswitch shall be of the maintained contact type, with fixed, oval blackhandle and complete with separately mounted red indicating lampassembly.Carrier Cut-off Switch (85CO). Each carrier cut-off switch shall beof the maintained contact type, with fixed, modem, oval black handle.Breaker Failure Cut-off Switches (50BF-CO). Each breaker failurecut-off switch shall be of the maintained contact type, with fixed, ovalblack handle and complete with separately mounted red indicatinglamp assembly.

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1002-21.11 Direct Transfer Trip Cut-off Switch (86DTTCO). Each directtransfer trip cut-off switch shall be of the maintained contact type,with fixed, modem, oval black handle.

1002-21.12 Permissive Transfer Trip Cut-off Switch (PTTCO). Each carrier cutoff switch shall be of the maintained contact type, with fixed, modem,oval black handle.

1002-21.13 Stub Protection Cut-off Switches (51 S-CO). Each differential cut-offswitch shall be of the maintained contact type, with fixed, oval blackhandle and complete with separately mounted red indicating lampassembly.

1002-22. Indicating Instruments. Each indicating instrument shall be semi-flushmounted, back connected, dustproof, fully tropicalized, switchboard type witha dull black case for mounting on a steel panel. Each indicating instrumentshall be of the linear-scale type. Each shall be suitable for operation with theinstrument transformers shown on the drawings or transducers in Article 100226 under both normal and short circuit conditions.Except as otherwise specified, all indicating instruments shall be approximately110 mm square with a 2500 scale arc.Scale plates shall have a permanent white fmish with black graduations andnumerals. Varmeter scale plates shall be marked _ IN(-)" at the left of theIscale, "-0-" at the center and" _(+) OUT" at the right. The scale range andother details of each indicating instrument shall be as specified in the bills ofmaterials.

All indicating instruments shall have the following characteristics andrequirements :1002-22.1 Overload rating continuous

Voltage circuit 1.2 x ratingCurrent circuit 2.0 x rating

1002-22.2 Accuracy 1.5% of full scale

1002-22.3 Response time Max. 2.5 seconds

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1002-22.4 Operating temperature range

1002-23. Grid TOU Energy Meters. Each three-phase, high precision or grid energymeter shall be inspected according to lEe standard or equality internationalstandard with aging reliability, safety and accuracy. Each energy meter shallcomprise kilowatt-hours meter and kilovar-hours meter integrally mounted inthe same enclosure. Each energy meter shall be the solid-state type and theaccuracy class is 0.2S for the kilowatt-hours meter and class 0.5 for thekilovar-hours meter. Each energy meter shall be 19 inches rack mounted, backconnected with essailec connectors, dustproof, fully tropicalized, switchboardtype, and completed with accessories for mounting. Each shall be suitable foroperation with the instrument transformers. Both kilowatt-hours and kilovarhours meters shall be display not less than 7 digits. Programming facilitiesshall be provided with each meter for any parameter setting. The meter shallhave a case, which can be sealed in such a way that the internal parts of meterare accessible only after breaking the seal.

Each energy meter shall have the following characteristics and requirements:

1002-23.1 General. Each high-precision grid energy meter shall be of 3 phase 4wires and 3 phase 3 wires measurement, 4 quadrants measurement ofactive, reactive and apparent energy meter and bi-directional. Eachmeter shall have display sequence (manual and automatic scrolling),load profile and event recorder function. Each meter shall be fullysupported for automatic meter reading and shall have a approved testby using the existing EGAT Automatic Meter Reading (AMR)software.

1002-23.2 Accuracy. The meter shall have accuracy class 0.2S according to IEC62052-11 and 62053-22 for active energy (kilowatt-hours) and 0.5 forreactive energy (kilovar-hours).

1002-23.3 Minimum display requirement. The meter shall measure and displayat least the following electric values:- Active Energy- Reactive Energy- Apparent Energy- Maximum Demand Active Energy- Current L1, L2, L3

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- Line to Line Voltage- Voltage Phase Sequence- Active Power- Reactive Power- Power Factor- Frequency- Maximum Demand- Demand Time Period- Billing Values:

The billing values are the energy of each billing period andlor theaccumulative energy, comprise of the total energy and the energyof each tariff rate. Those billing values shall be recorded in themeter and can set to display on the front panel. The displayingvalues, billing values, the summated energy of each tariff rate shallbe equal to the total energy during the same billing period.

1002-23.4 Calibration. The meter shall be calibrated andlor tested using thepulse stream from LEDs or infrared on the front panel that has rateproportional to the measured power. EGAT shall be able to adjust thepercentage error manually or via software program. If the meter hasnever used in EGAT before, the calibration software shall beprovided.

1002-23.5 Current Measuring Circuit.- Rated current: 5 A

Measuring range 50mA 6AStarting current 50 mA at unity power factorFrequency 50 5 HzOverload current 1.2 x In continually

20 x In short-circuited1002-23.6 Voltage Measuring Circuit.

- Rated voltage 3 phases 4 wires andlor3 phase 3 wires configuration58 -130 V AC(phase to neutral)

Measuring range 80-115% of phase voltageFrequency 50 5 HzOverload current 1.15 x Un continually

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1002-23.7 Output 1-0 ports.Type Solid state for pulsing outputRating 24-140V DCPulse width 80 ms ( can be adjustable)

- At least 4 output ports1002-23.8 Tari ff structure.

- The meter shall support at least 4 tariff rates for each of 4quadrants of active and reactive energy measurement in eachbilling period.

- The meter shall support maximum demand (block intervaldemand) calculation for each above tariff rates corresponding tothe selectable of 15 or 30 minutes interval. Those maximumdemand and the time ofmaximum demand shall be recorded in themeter, and can be set to display on front panel or read by theservice software.

- The billing reset for ending of billing period should be automaticreset by calendar time programming.

1002-23.9 Load Profile.- The load profile shall be either average demand (kW, kV AR,

kVA) profile or energy profile (kWh, kVARh, kV Ah) recording inselectable time interval of 1,5, 10, 15,30 or 60 minutes.

1002-23.10 Data storage. The minimum requirement of data storage of each metershall be stored 4 values of above load profile in 30 minutes timeinterval and shall not less than 150 days.

1002-23.11 Power Supply.Main power supply 57.5-130 VAC (phase to neutral)Auxiliary power supply 23015%VAC or 12515% V DC

- The meter shall normally draw power from VT circuits that can beany voltage level in the full measuring range of 57.5-130 VAC(phase to neutral). Even if one or two measuring voltage inputs aremissing, the meter shall still operate correctly without losing anyaccuracy of the measurement (voltage from I-phase input issufficient to power the meter). If all voltage inputs are missing, themeter shall changeover to draw power from an auxiliary powersupply automatically without any effect to the accuracy of themeter.

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1002-23.12

1002-23.13

1002-23.14

Meter Security. The meter accessing via any communication portsshall be protect by passwords programming, those passwords shall beassigned into many security levels of users or user groups dependingon authentication of the authorized works. The meter shall beprotected by the verification seal, the internal parts of the meter shallnot be physical accessed without breaking the seal.Communication. The meter shall be comprised as follows:- Optical port 1 port

(flag or opticom port according to lEC 62056-21 (IECl107) orANSI standard)

- RS-485 port 1 port(for multi-drop communication connections)

- Ethernet port 1 port(for IP base communication)

User shall communicate with the meter as the following methods:- Local accessing : The meter shall be local accessed by using the

optical port, flag or opticom port according to lEC 62056-21(IEC 1107) or ANSI standards.- Remote accessing : The meter shall be remote accessed by usingRS-485 and Ethernet ports, and all ports can be accessed theconnections simultaneously:

The RS-485 port provide for meter accessing via dial up(PSTN or GSM) network and should be supported formulti-drop connection.

The Ethernet port are provided for remote access themeters via IP based (TCP/IP) network.

Time synchronization. The calendar clock of the meter shall besynchronized by the automatic meter reading (AMR) software fromthe central station server, which send time information to the metervia the selected communication system.

The calendar clock of the meter also can be synchronized by localGPS standard time receiver too, and each meter shall be equippedwith the port (other than the communication port specified in 100223.13) that could be connected to the above GPS receiver.

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The bidder has to show the list of the GPS receiver(s) (manufacturer,model, type) which supported time synchronization ofmeter.

1002-23.15 General Working Condition.Working temperature -10 .. . +55C

- Storage temperature: -25 .. .+70CTemperature coefficient :::;0.3% /lOCDielectic tests

4 kV 1 min(inputs)2 k V 1 min(pulse outputs)

Electric fasttransients2 kV according to IEC 801-4

Air-discharge 8 kV Contact-dischargeRF interference

0.15-30 MHz according to CISPR 14.630-300 MHz according to CISPR 14.7

Impulse voltage test6 kV according to IEC 255-4

Protection level IP52

1002-23.16 Software(s). The meter shall deliver to EGAT with the software(s) asthe following characteristics:

Parameter setting software- The bidder shall supply the meter parameter setting software for

the applied meters in case of these meter(s) could not beprogrammed by EGA T existing software.

Calibration software- The bidder shall supply the meter calibration software (thepercentage error adjustment of the meter) to calibrate all appliedmeters in case of the applied meters could not be calibrated byEGA T existing software.

- The calibration software shall be the version without expiration,the bidder has to provide the official confirmation letter ordocument related to the expiration of this calibration software asthe part of bidding documents.

Automatic meter reading (AMR) software

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- The purpose of the AMR software is using for metering datacollection and time synchronization automatically via the selectedcommunication.

- In case of the meter has not specified in the EGA T Accepted TOUEnergy Meter List (document no. 1009), the bidder shall apply forapproval, and the AMR software will be one of the importantfeature to be included for the consideration.

- The bidder shall either providing the right for EGAT to useexisting AMR software to read and sync time the applied meter orproviding the new AMR software for EGAT approvaL

Software manual(s)- All of above software shall deliver to EGAT with complete set of

instruction manuals both in English and Thai language.- The instruction manuals shall comprise theory of operation and

applications, installation and system arrangement, spare part lists,and detailed circuit diagram as necessary for repair andmaintenance.

- The Thai language instruction manuals shall be approved byEGAT before delivering all copies of them.

- The instruction manuals shall be both in hard copy and electronicfiles in CD-ROM.Important remark for software(s)

- All of above software shall operate under Microsoft windowsoperating system environment.

- The bidder shall supply the communication protocol and necessaryinformation of the meter to EGAT (or the third party appointed byEGAT), to develop the interface (meter accessing) software.

1002-23.17 Certification.- The type test of the meter shall be certified according to class O.2S

(kWh) ofIEC 60687 or lEe 62052-11 and IEC 62053-22 standard,by the third party who have been authorized by ISO/IEC 17025standard or equivalent. The bidder shall supply the type test reportto EGAT during bid evaluation period. The meter shall not beacceptable if those type test is not available.

- The factory test report of active and reactive energy of everyenergy meter shall be supplied with the meter at the time deliver toEGAT.

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The manufacturer must be certified by ISO 9000 standard orequivalent.

1002-24. Universal Telecounting Instruments. Each universal telecounting instrumentshall be of the flush mounted, back-connected, dustproof, fully tropicalized,switchboard type. Each instrument shall be of the pulse-operated, and statictype. Each instrument shall comprise input units, summation device, displayunit, timer and necessary components required for the completion of thetelecounting instrument. Each shall be suitable for operating in conjunctionwith the energy meters in Article 1002-23 and be capable of handling thepulses from one or more energy meters.Each telecounting instrument shall be provided with means to transfer of meterdata to the dispatching center via a communication channel.

Each telecounting instrument shall have the following characteristics andrequirements:

1002-24.1 Minimum twenty (20) pulse inputs and complete with pulsesupervlsIOn. Each instrument shall be expandable up to forty (40)inputs.

1002-24.2 Minimum one (l) serial input module.

1002-24.3 Output contacts for transmitting of general alarm, timing signals,calculated results, inputs and tariff signals.

1002-24.4 Summating of inputs and results.1002-24.5 Volt-Ampere calculation from active and reactive power.1002-24.6 Twenty-four (24) maximum stores for inputs and results.1002-24.7 Billing control shall be provided with each instrument and operated

by an external control signal and by means of a pushbutton on theinstrument. Each instrument shall also have automatic billing control.

1002-24.8 Internal highly accurate calendar/clock, quartz or networksynchronized.

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1002-24.9 LDC display with four (4) lines of twenty (20) characters, eleven (11)- digit energy and six (6) digit demand values.

1002-24.10 Battery backup for at least one-year storage of information (data,parameters) after loss ofpower supply.

Each universal telecounting instrument shall be Siemens or equivalent.

1002-25 Fast Receipt printer. Each printer shall be 9 pin, dot matrix type and shall havememory at least at 4 kByte. Each shall include connection ports both RS232Cserial port and parallel port centronics parallel. Power feeder system of eachprinter shall be continuous paper type, width 76.00.5(W) x diameter 83.0 rnrnand thick 0.065-0.085 rnrn Power supply shall be 220-240 V AC, 50 Hz, 30W.

1002-26. Transducers. Each transducer shall be of the surface-mounted, dustproof, fullytropicalized type. The entire transducer shall be removable from the enclosureto provide complete accessibility to components and circuitry. Each transducershall generate a DC voltage or current output proportional to the quantity beingmeasured. Input stage coupling shall use an ultra-linear transformer, ifrequired. Output stage shall be a solid-state output amplifier and shall be shortcircuit proof. Each shall be independent of external load resistance over a rangeas required. Each transducer shall be suitable for use with instrumenttransformers. Means shall be provided with each transducer to adjust zero shiftand span or gain. Each shall withstand the voltage of 1,500 V for one minutebetween independent circuits, input and output circuits to case.

1002-26.1 Detailed Requirements. Each transducer shall have the followingcharacteristics and requirements:

1002-26.1.1 BurdenVoltage circuit Max 4 V A per elementCurrent circuit Max 0.8 VA per element

1002-26.1.2 Overload withstand continuousVoltage circuit 1.2 x ratingCurrent circuit 2.0 x rating

1002-26.1.3 Accuracy: 1% when output from 5% to 125% of fullrated output

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1002-26.1.4 Output ripple

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Full scale output oto 1 rnAunidirectional

External load resistance Oto lOkOSuppressed zero adjustment 85 to 100 V ACInput span adjustment 10 to 50 V ACMaximum full input 150V AC

1002-26.5 Current Transducers. Current transducers, if required, shall befurnished in accordance with the following articles:

1002-26.5.1 Current Transducers for Use with Indicating Ammeter. Eachcurrent transducer shall be designed for use with the indicatingammeter in Article 1002-22 and shall meet the followingrequirements :

Rated input from CT secondary as specified in Bills ofMaterial

Rated output oto 1 rnA unidirectionalExternal load resistance Oto lOkO

1002-26.5.2 Current Transducers for Use with Remote Terminal Unit(RTU). Each current transducer shall be designed for use withthe remote terminal unit (RTU) furnished under separateSpecification. Each shall have the same requirements asspecified in Article 1002-26.5.1.

1002-26.6 Frequency Transducers. Frequency transducers, if required, shall befurnished in accordance with the following articles:

1002-26.6.1 Frequency Transducer for Use with Telemetering Equipment.Each frequency transducer shall be designed for use withtelemetering equipment and shall meet the followingrequirements :

Frequency span 48---50---52 HzFull scale output oto 1 rnA unidirectionalExternal load Oto 10 kO

1002-26.6.2 Frequency Transducer for Use with Remote Terminal Unit(R TU). Each frequency transducer shall meet the same

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requirements as specified in Article 1002-26.6.1. Each shall besuitable for use with the remote terminal unit (RTU) furnishedunder separate Specification.

1002-26.7 Temperature Transducers. Each temperature transducer shall be foruse in conjunction with 10 ohms (at 25C) copper resistancetemperature detector for both indicating and recording of thetransformer winding temperature. Each transducer shall be suitablefor use with the remote terminal unit (RTU) furnished under separateSpecification. Each shall have the following requirement:

Temperature range :

1002-26.8 DC Voltage Transducers. Each DC voltage transducer shall bedesigned for use with the remote terminal unit (RTU) furnished underseparate specification, and shall meet the following requirements:

Voltage range 30 .. 150 V DCRated output oto 1 rnA unidirectionalExternal load oto 10 kO

1002-27. Transformer Tap Position Transducers. Each transformer tap positiontransducer shall be of the surface-mounted, dustproof, fully tropicalized type.The entire transducer shall be removable from the enclosure to permit completeaccessibility to components and circuitry. Each transducer shall be designed tooperate in conjunction with a multi-tap resistor which is used as transformertap position input signal. The multi-tap resistor will be provided and located inthe transformer LTC driving mechanism panel. Each transducer shall generatea DC voltage or current output corresponding to the tap position beingtransmitted to telemetering equipment. Output stage shall be a solid-stateoutput amplifier and shall be short circuit proof. The current output shall beindependent of external load resistance over a range as specified in the bill ofmaterials. Means shall be provided with each transducer to adjust zero shift andspan or gain. Each shall withstand the voltage of 1,500 V for one minutebetween independent circuits, input and output circuits to case.

Each transducer shall have the following characteristics and requirements:

Input range Oto lOkO Rated output oto 1 rnA, unidirectional

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Extemalload resistance Oto lOknAccuracy 0.5% of span, maximumResponse time 1 second, maximum, to 99% of final valueCalibrate adjustment 10%Zero adjustment 10%AC power supply input range 80% to 120% of rated voltage, 50 HzOperating temperature range +20C to +70COperating humidity Oto 95%

1002-28. Relays. All relays shall be designed for continuous operation at any voltagefrom 80 per cent to 115 per cent of rated DC voltage as specified and at a rangeof ambient temperatures of 10C to 55C. All binary inputs shall be triggeredby any voltage over a range from 80 per cent to 115 per cent of the rated DCvoltage only. Each protective relay shall be suitable for operation withinstrument transformer ratios and connections as shown on the metering andrelaying diagrams under both normal and short circuit conditions.All relays contacts for tripping duty shall be rated to carry lOA, 300V for 1second, 4A, 300V at continuous duty, and be capable of interrupting of 0.2A ofinductive current (LIR :::;40 ms) in a 125 V DC control circuit.

Except as otherwise specified, each protective relay shall be furnished with atleast two (2) electrically separate normally open contacts in addition to thoserequired by the functions of each protective relay. These contacts shall be : onecontact shall be wired to initiate the remote terminal unit (RTU) and onecontact shall be wired to initiate the fault recorder.Static, digital or numerical relays shall be supplied as complete relayingsystem. All relays and components necessary to complete a system shall befully tropicalized, contained in a common enclosure, and shall be completewith all interconnections and wiring for back-connection. Enclosures shall berectangular, finished dull-black, dustproof, suitable for semi-flush switchboardpanel mounting or rack mounting as specified, with a removable transparentcover, or a cover with a transparent window, with provision for sealing.Operation indicating lights and identifying labels shall be provided with eachrelaying system and shall be clearly visible and identifiable.

Each relaying system shall be provided with test facilities for secondaryinjection testing and for isolating the DC supply, current circuits, potentialcircuits, tripping circuits, and all other output contacts. All test switches shall

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be arranged so that the current transfonner secondary circuit cannot be opencircuited in any position while the test plugs or cover plugs are being insertedor removed. The internal contacts of test switches shall be nonnally sprungtogether by themselves to complete the circuit link.

Test plugs shall be furnished with each type oftest switches.

The Contractor shall ensure that each protection function is independent ofothers and can be individually isolated to allow each alone to be taken out ofservice for testing or operational purposes.

All static, digital or numerical relays shall be adequately protected againstdamage from incoming surges and shall meet ANSI SWC test standard.

Each relay shall utilize a DC-to-DC converter-type regulated power supply toprovide transient surge isolation between the station battery and the electroniccomponents of the relay system. Each DC-to-DC converter shall be designed toprotect it from high voltage and surge, and shall provide two electricallyseparate contacts for remote annunciation of output voltage failure. Each powersupply shall be designed for continuous operation at any voltage from 80 percent to 115 per cent of rated DC voltage as specified and at a range of ambienttemperature of lOoC to 55C and 0 to 95 per cent humidity. Each power supplyshall be immune to damage from accidental short circuiting of the input oroutput DC supply. Each shall not generate any signal, noise, or impulse on theinput DC supply leads which is greater than 300 millivolts peak to peak.

Relays utilizing voltage divider type regulated power supplies shall not beaccepted.

All modules of static, digital or numerical type protective relays shall consist ofhighly reliable logic circuits and circuit components. All modules shall bemounted on plug-in circuit cards. Wiring boards shall be epoxy-fiberglassconstruction. Printed circuit wiring shall be employed with soldered or weldedconnections to circuit components. Wiring board shall be provided with heavyduty circuit connectors with gold-plated contacts.

Each digital or numerical relay shall have provisions for monitoring any hardwarefailures so they can be repaired before they affect relay operation. Theseprovisions shall also include output contacts for initiating the remote tenninal unit(RTU). All output contacts shall be electrically separate nonnally open contacts.

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Each digital or numerical relay shall be configured to comply with all EGAT' sneeded functions before delivery. Configuration setting of the relay, which isprogrammable, shall be supplied in diskette or CD-ROM.

The instruction manuals shall be prepared with the object of providingsufficient detailed technical information of each type of protective relays toenable EGAT to efficiently carry out commissioning and routine testing. In thisregard, each instruction manual shall give full details of circuit operation,circuitry and components. All technical data, operating time curves, samplecalculations and other characteristics shall be based upon 50 hertz operation.The manuals shall also provide guidelines on the tracing of faults, ease theordering of the replacement parts and meet the requirements as listed inDrawings and Documents to be Furnished by the Contractor under SpecialConditions of Contract Documents. The manuals shall be submitted to EGATat least 3 months prior to the beginning of the commissioning process.

The protective relays offered shall be products of the approved protective relaymanufacturers listed as follows: ABB (Sweden, Switzerland, U.S.A.), GE(U.S.A., Canada, Spain), AREVA (U.K., France), Reyrolle (U.K.), Siemens(Germany) , SEL (USA), or TOSHIBA (Japan).

The procedures for being listed in EGAT's Specification and EGATACCEPTED Main RELAY LIST can be requested from Transmission SystemEngineering Division.

1002-28.1 Synchro-Check Relays (25 + 27/59). Each synchro-check relay shallbe of the static, digital or numerical type. Each relay shall be usedwith automatic reclosing relay for line circuit breaker on loop systemsfed by power sources at two or more points. Each synchro-checkrelay shall allow its reclosing relay to close the line breaker only onthe condition that the line voltage and bus voltage are in normalcondition, of the same frequency, equal and in-phase. Closing angleand operation times shall be independently adjustable.

Each synchro-check relay shall incorporate a voltage check relay forthe options of reclosing on dead bus-live line and dead line-live bus.Each voltage check relay shall have the operating time not more than250 milliseconds.

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The operating mode of the synchro-check relay shall be selectablefrom all of the following options: live line-live bus, dead bus-live lineand dead line-live bus.Another type of the synchro-check relay for Computerized ControlSubstation (CCS) shall be capable of selecting all of the modes ofoperation which may be live line-live bus, dead bus-live line and deadline-live bus at the same time.

1002-28.2 Transformer Differential Relays (87K). Each transformer differentialrelay shall be of the single-phase or three-phase, high speed, variablepercentage, differential type with adjustable sensitivity and harmonicrestraint and shall not operate for overexcition. The faulty phase shallbe identified in case of the three-phase transformer differential relay.Each transformer differential relay shall be of the numerical type. Thenumber of restraint windings for each single-phase relay shall beindicated on the drawing entitled "Metering and Relaying Diagram"for each substation.Each relay shall include the instantaneous trip unit to ensure highspeed operation on heavy internal faults. Each relay shall incorporatecurrent taps or separate auxiliary current transformers to compensatefor main current transformer mismatch. A cut-off switch (87K-CO)with a separate red indicating lamp shall be provided with each set ofrelays, to segregate the auxiliary tripping relay from the differentialrelays as necessary to prevent false tripping due to the bypassing ofthe current transformers. The red lamp shall light to indicate that thetrip circuit from the differential relays to the auxiliary tripping relay isclosed. Each cut-off switch shall be in accordance with therequirements ofArticle 1002-21.Transformer differential relay shall include Ethernet rear port typeRJ45 for the data communication between the relays at remotesubstations and the PC at the central office.Transformer differential relay shall support IRlG-B signal input anddisturbance recorder function.

Each transformer differential relay shall be furnished with at least two(2) electrically separate normally open contacts in addition to those

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required by the transformer differential protection functions. Thesecontacts shall be : one contact shall be wired to initiate the remoteterminal unit (RTU) and one contact shall be wired to the faultrecorder.

1002-28.3 Bus Differential Relays (87B). Except as otherwise specified, eachbus differential relay shall be of high impedance voltage operatedtype or low impedance type which is indicated on the drawing entitled"Panel Equipment Lay-out" or the Bill of Materials. The highimpedance voltage operated type shall be of the single-phase, highspeed, with overvoltage limit device and its type shall be static, digitalor numerical. The low impedance type shall be of three-phase, highspeed and its type shall be digital or numerical. The bus differentialrelay shall be provided 'with a supervision unit that is used to detect anunbalance current or voltage in the differential measuring circuit due toleak or open in the CT circuits. A cut-off switch (87B-CO) with aseparate red indicating lamp shall be provided with each set of relays tosegregate the differential relays from the auxiliary tripping and lockoutrelay as necessary to prevent false tripping due to the bypassing of thecurrent transformers. The red lamp shall light to indicate that the tripcircuit from the differential relays to the auxiliary tripping relay isclosed. Each cut-off switch shall be in accordance ~ i t h the requirementsofArticle 1002-21.Low impedance type bus differential relay shall include Ethernet rearport type RJ45 for the data communication between the relays atremote substations and the PC at the central office.Low impedance type bus differential relay shall support IRlG-Bsignal input and disturbance recorder function.Each bus differential relay shall be furnished with at least two (2)electrically separate normally open contacts in addition to thoserequired by the bus differential protection functions. These contactsshall be : one contact shall be wired to initiate the remote terminalunit (RTU) and one contact shall be wired to the fault.

1002-28.4 Auxiliarv Tripping and Lockout Relays (86K, 86B, 86DTT, 86BF).Auxiliary tripping and lockout relays shall be provided withtransformer protection, bus protection, direct transfer tripping and

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breaker failure protection. Each relay shall be of the high speed, drawout and DC voltage operated type. The operating time includingbouncing time of each relay for protection and bus protection shallnot exceed 10 milliseconds. There shall be coil transient suppressiondevice in order to protect the relay coil from electromotive force. Amanual reset control switch with cut-off contact shall be provided tointerrupt the operating coil. The minimum number of contacts shall besufficient and correct as specified in the protective device function orbill ofmaterials.

1002-28.5 Non-Directional Overcurrent Relays (51T/51TG, 51151G, 51L151LG).Each non-directional overcurrent relay shall be of the single-phase orthree-phase, numerical type \\lith independent measuring units andmultiple time current characteristics according to IEC 255-3 standard.Each relay shall have an instantaneous trip attachment and shall providemeans to select appropriate values of both current setting and operatingcharacteristics for phase and ground protection independently. Thethree-phase relay shall be able to identifY the faulty phase. For phaseovercurrent protection, the operating current shall be adjustable over awide range from approximately 20 to 300 % of the protectedequipment's rated current for the time-delay unit, and 400 to 2,000% ofthe protected equipment's rated current for the instantaneous unit,unless otherwise specified. For ground overcurrent protection, theoperating current shall be adjustable over a wide range fromapproximately 10 to 50% of the protected equipment's rated current forthe time-delay unit, and 200 to 2,000 % of the protected equipment'srated current for the instantaneous unit. Operating time shall also beadjustable.

Overcurrent relay shall include Ethernet rear port type RJ45 for thedata communication between the relays at remote substations and thePC at the central office.Overcurrentrelay shall support IRlG-B signal input and disturbancerecorder function.

Each overcurrent relay shall be furnished with at least two (2)electrically separate normally open contacts in addition to thoserequired by the bus differential protection functions. These contactsshall be : one contact shall be v.rired to initiate the remote terminal

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unit (RTU) and one contact shall be wired to the fault.1002-28.6 Non-Directional Overcurrent Ground Relays (51GB1). Each non

directional overcurrent ground relay shall be of the single-phase,numerical type with the long time inverse current characteristicsaccording to IEC 255-3 standard. Each relay shall have an instantaneoustrip attachment. Operating currents shall be adjustable over a wide rangewith approximately 80-120% ofOA rating tertiary winding for the timedelay unit and 400-2,000% of OA rating tertiary winding for theinstantaneous unit, unless otherwise specified. Operating time shall beadjustable.

Overcurrent relay shall include Ethernet rear port type RJ45 for thedata communication between the relays at remote substations and thePC at the central office.Overcurrentrelay shall support IRIG-B signal input and disturbancerecorder function.

Each overcurrent relay shall be furnished with at least two (2)electrically separate normally open contacts in addition to thoserequired by the bus differential protection functions. These contactsshall be : one contact shall be wired to initiate the remote terminalunit (RTU) and one contact shall be wired to the fault.

1002-28.7 Non-Direct