substation spec

7/29/2019 substation spec

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EQUIPMENT SPECIFICATIONSDamodar Valley Corporation, PSR Section, Electricity Dept.

Tender Specification

E DCON / EHV/BURNPUR EXTN./220 KV

Volume

2


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D A M O D A R V A L L E Y C O R P O R A T I O N

Tender specification

EDCON/EHV/Burnpur Extn. /220KV

PSR Section, Electricity DepartmentDVC TOWERS

VIP RoadKolkata - 700054

Phone 033 2355 6043 Fax 033 2355 9618


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Table o f Cont ent s

SPECIFICATION FOR CONTROL AND RELAY PANELS..........................................................3SPECIFICATION FOR METERING EQUIPMENT.....................................................................26SPECIFICATION FOR CIRCUIT BREAKERS...........................................................................38SPECIFICATION FOR ISOLATORS..........................................................................................50SPECIFICATION FOR INSTRUMENT TRANSFORMERS .......................................................59SPECIFICATION FOR LIGHTNING ARRESTERS....................................................................68SPECIFICATION FOR LT (FRLS) CABLES ..............................................................................72SPECIFICATION FOR ALUMINIUM TUBES.............................................................................79SPECIFICATION FOR CONDUCTOR......................................................................................83SPECIFICATION FOR CONNECTOR .......................................................................................88SPECIFICATION FOR HARDWARE AND ACCESSORIES......................................................92SPECIFICATION FOR SOLID CORE POST INSULATORS...................................................103SPECIFICATION FOR DISC INSULATORS............................................................................107SPECIFICATION FOR LIGHTING ...........................................................................................122SPECIFICATION FOR JUNCTION BOXES & OUTDOOR PANELS.......................................134SPECIFICATION FOR SAFETY EQUIPMENT........................................................................138


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SPECIFICATION FOR CONTROL AND

RELAY PANELS

DAMODAR VALLEY CORPORATIONELECTRICITY DEPARTMENT

VIP ROADKOLKATA - 700054

1 Scope

The specification covers the design, manufacture, assembly, testing at manufacturers

works, packing and delivery of control and relay panels for 220KV/ 33KV substations.

2 StandardsEquipment covered by this specification shall conform to latest issues the following

Standards:

IS:1248 Direct Acting Indicating Analogue Electrical Measuring

Instruments and their Accessories

IS:6236 Direct recording electrical measuring instruments.

IS:13703 Low voltage fuses.

IS:5578 Guide for Marking of insulated conductors.

IS:694 PVC insulated cables for working voltages up to and including

1100V.

IS:11353 Uniform system of marking and identification of conductors and

apparatus terminals.

IS:3231 Electrical relays for power system protection.

IEEE C37.90 IEEE Standard for Relays and Relay Systems Associated with

Electric Power Apparatus.

IEEE C37.90.1 IEEE Standard Surge Withstand Capability (SWC) Tests for

Protective Relays and Relay Systems Associated with Electric

Power Apparatus.

IEEE C37.90.2 Electrostatic Discharge Tests for Protective Relays

IEC 60688 Electrical Measuring Transducers for converting a.c electricalquantities to analogue or digital signals.

IEC 60255-5 Electrical Relays- Part 5 : Insulation co-ordination for measuring

relays and protection equipments-Requirements and tests

IEC 60255-6 Electrical Relays-Part 6: Measuring Relays and protection

equipments.

IEC 60255-22-2 Electrical disturbance tests for measuring relays and protection

equipment, Electrostatic Discharge Tests


equipment, Radiated Electromagnetic Field Disturbance Tests



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equipment, Fast Transient/burstimmunity Tests

IEC 60255-22-6 Electrical disturbance tests for measuring relays and

protection equipment - Immunity to conducted

disturbances induced by radio frequency fields

IEC 60255-25 Electrical relays - Part 25 : Electromagnetic emission

tests for measuring relays and protection equipment

IEC 61850 Communication networks and Systems in Sub-station all

relevant latest versions and editions.

Where the equipment offered conforms to any other standard, the salient points of

difference between the standards adopted and IEC recommendation shall be clearly

indicated and the English version of the proposed standard shall be furnished.

3 Function

Control : The panels shall be used for switching in and out transmission lines, power and

auto transformers, feeders with adequate indications depicting the status of eachequipment.

Protection : The panels shall also provide adequate relays for protection of transmissionlines, power and auto transformers, feeders as detailed in section 5.2.

Protection Transfer : For 220 KV 3-bus and 132 KV 2-bus layouts, there are noprovision of CTs in the Bus Coupler as the CTs are located on the Line side of the bays.

In the case of 33 KV 2-bus layout, for the transformer bays only, CTs are located on thetransformer side.

For 33KV feeders bays, CTs are located on the Main bus side. For transfer of 33 KV

feeder bays one set of CTs are located in the 33 KV Bus Coupler.

In the event of transfer of a 220 KV / 132 KV Line / Transformer bay to the bus couplerbay, all protective commands are to be diverted to the bus coupler breaker through aprotection transfer switch. During transition it should supervise both the breakers.Necessary mechanical interlock (key operated) shall be provided so as allow the diversionof one bay to Bus Coupler at a time.

Interlocks : Adequate interlocks to be ensured between breaker and isolators.

4 Construction

The panels shall be of Duplex or Simplex type as indicated in the Specific Requirements.

The panels shall be sheet steel enclosed, dust and vermin proof with minimum degree ofprotection not less than IP-31. The panels shall be floor mounting freestanding typemounted on a supporting structure so as to form a rigid enclosure suitable for theapplication. The panels shall be fabricated out of CRCA sheet steel of minimum 3 mmthickness for the front and back covers, doors and load bearing members and 2 mm forthe rest. All doors and openings shall be provided with neoprene gaskets.

The panel shall be provided with integral base frame. The integral base frame of panelsshall be suitable for directly bolting with the help of foundation bolts and shall also besuitable for tack welding to the control room floor embedded insert plate/ flat/ channel.

Amply dimensioned oblong holes shall be provided at the bottom of all panels for boltingon to the embedded insert channel.
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The height of the panels shall not exceed 2400 mm and the bottom of the panels shall

have a 100 mm thick plate all around.

Cable entry shall be from the bottom unless specified otherwise. A suitable removable

undrilled gland plate shall be provided for cable entry.

Suitable compression type cable glands as required for cable termination in the control

panel shall be supplied. The control panels shall be matched with other panels indimension and colour wherever specified.

Simplex type panels shall be with equipment mounted on the vertical front and access towiring from rear. Door at the rear shall be provided with handles and locking facility.

Duplex panel shall consist of a front and a rear panel connected back to back with a walkwayin the central corridor having width not less than 800 mm. There shall be complete accessthrough the corridor to the terminal blocks, internal wiring and components mounted onthe panel. Separate cable entries shall be provided for front and rear panels.Interconnection between front and rear panels shall be by inter-panel wiring (through thecorridor) at the top of the inside of the panel. Adequately sized hinged type access doorsshall be provided at both ends complete with door handles, lock and latching facility.

4.1 Component mounting

In case of Simplex Panels, all controls, indications, meters, annunciations, mimicdiagram, protective relays having operations indicator and lock out relays requiring handreset shall be mounted on panel front. However auxiliary relays can be mounted inside, ifthe space on panel front is limited. All components shall be neatly arranged in a matching

manner.

In case of duplex panels, controls, indications, meters, annunciations and mimic diagramshall be mounted on the front panel and relays shall be mounted on the rear panel.

All equipment mounted on front/rear panels shall be flush mounting type. All meters/components shall be suitable for vertical/horizontal mounting.

All control gear, switches, push buttons etc. shall be within easy reach for properoperations. The meters shall be so located as to enable easy observations of readings.

Checking and removal of individual components shall be possible without disturbing theadjacent equipment. It should be possible to test all the protective relays in-situ. Theinternally mounted components, auxiliary equipment such as transducers, interposing CTs

etc. shall be mounted in such a way as to be readily accessible without impeding theaccess to internal wiring and other components.

All control and supply cables will be laid in distributing trenches running under the controlpanel. Necessary drawing showing cable entry positions and foundation bolt locationsshall have to be supplied by the successful Bidders. The control panels shall be suppliedcomplete with channel base grouting bolts, nuts, washers etc.

4.2 Wiring

The wires shall conform IS:694.

All wiring shall be done with PVC insulated 1100V grade, single core multi-strand(minimum 3 strands) annealed copper conductors. The wires shall be flame proof andvermin proof. The minimum size for different circuits shall not be less than those asspecified below :

1) Current Transformer Circuit : 1 X 2.5 sq. mm. Copper

2) Voltage Transformer Circuit : 1 X 1.5 sq. mm. Copper

3) Other Circuit including Control wires : 1 X 1.5 sq. mm. Copper for fuse rating of 10Amps or less.

Each wire shall be identified at both ends with wire numbers by means of PVC ferrules.


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Ferruling of wires shall be as per relevant IS. All control wiring shall be enclosed in plastic

channels.

The terminal blocks shall be located so as to ensure easy access. Split type terminal blocks

shall be provided for all CT terminals. The terminals screws shall be of the Washer type

and long enough for connecting following type conductor on each side.

Each terminal block shall be capable of terminating the following no. of wires:

CT circuits 2 nos 10 mm sq. copperPT/CVT circuits 2 nos 2.5 mm sq. copperAC/DC supply circuits 2 nos 2.5 mm sq. copperAll other circuits 2 nos 2.5 mm sq. copper

Each terminal block shall be provided with a wire-marking strip and shall be shrouded byeasily removable shrouds moulded of transparent dielectric material. Provision shall bemade on each pillar for holding 20% extra connections both for incoming and outgoing.The terminal blocks shall be suitable for 660 V,10 A rating.

There shall be a minimum clearance of 250 mm between the front row of terminal block

and the associated cable gland plate on panel side wall. The clearance between two rows

of terminals block edges shall be a minimum of 150 mm.

All inter-panel wiring within each shipping section shall be the vendors responsibility.

Wiring between panels shall be routed through PVC sleeves. For wiring between

shipping section, vendor shall provide terminal blocks on adjacent shipping sections and

supply suitable jumpering wires.

4.3 Earthing

A continuous 25mm X 3mm copper (tinned) earth bus shall be provided along the full

length of the panels. Suitable arrangement shall be provided at the two ends for

connection to the plant grounding system.

Each panel and the equipment mounted on each panel shall be securely connected to thegrounding bus. For this purpose the ground wire shall be looped from equipment toequipment and both ends of the ground wire shall be connected to the ground bus. Alldoors and movable parts shall be connected to the ground bus with flexible copperconnections.

Current free metallic parts or metallic bodies of equipment shall be earthed with softdrawn single conductor bare copper. Tail connection shall have minimum area of 16 sq.

mm and main connection 60 sq. mm. These wires shall be connected by Ross-Courtneyterminals and clamp junctions. Soldered connections shall not be employed.

The main earth connection for each panel shall be brought out to terminals for

connection to the station earthing system.

4.4 Illumination & Space heaters

Incandescent or fluorescent lamps working on 240V AC, operated by door switches shall be

provided for internal panel illumination.

A 240V, single phase, 5A, 3 pin socket shall be provided in the panel corridor or interior of

each cubicle with on-off switch for connection of hand lamps. This socket shall be metal

clad type with a spring loaded flap.

Panel space heaters shall operate on 240 V10% AC and shall be supplied complete with on-off switch, fuse and thermostat. A common thermostat shall be provided for the entirepanel. The thermostat shall maintain the internal temperature above the ambienttemperature to prevent moisture condensation. The watt loss per unit surface of theheaters shall be low enough to keep surface temperature well below visible heat.


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4.5 Painting

All metal surfaces shall be thoroughly cleaned and degreased to remove mill scale, rust,

grease and dirt. Fabricated structure shall be pickled and then rinsed to remove anytrace of acid. The under surface shall be prepared by applying a coat of phosphate paintand a coat of yellow zinc chromate primer. The under surface shall be made free from allimperfections before undertaking painting coat. After preparation of the under surface, therelay and control panel shall be spray painted with two coats of final epoxy paint or shall

be powder coated. Colour shade of final paint shall be 631 (light grey) as per IS:5 unlessotherwise specified. The spray painted finished panels shall be dried in stoving oven in dustfree atmosphere. Panel finish shall be free from imperfections like pin holes, run-off paintetc.

All hardware parts shall be cadmium plated or suitably treated to prevent rust and

corrosion. If these parts are moving elements these must be greased.

4.6 Mimic diagrams

Mimic diagram shall be provided on all panels. The mimic diagram shall be screwed onto the panels and shall be made of anodised aluminium or plastic of approved fast colour.

The mimic shall be 10mm wide for horizontal run and 5mm wide for vertical run.

If semaphore indicators are used for indicating isolator position, they shall be automatictype and shall be mounted in the mimic in such a way that isolator closed position shallcomplete the continuity of the mimic. Alternatively red and green lamps may be used forindicating the Closed and Open position of the isolators. In such cases the isolator controlswitches shall be placed at appropriate positions in the mimic diagram. The mimicdiagram shall also incorporate lamps and control switches for all the breakers.Alternatively discrepancy switches with in-built semaphore and position indication lampsmay be provided for breaker control/indication. The discrepancy lamp shall perform thefollowing functions:

The breaker on-off control shall be through this switch.

The lamp will remain steady when the semaphore position corresponds with thebreaker position.

The lamp will flicker if the semaphore position does not correspond with the

breaker position.

The colour code for the various voltages shall be as follows:

220KV - Golden Brown to shade 414 of IS : 5.

132 KV - Signal Red to shade 537 of IS : 5.

33KV - Brilliant Green to shade 221 of IS : 5.

Earth Black

5 Instrumentation

5.1 Control

5.1.1 Bay Control Units

The Bay Control Units (BCU) shall have, but not limited to, the following in-built

functions :

Mimic to display graphically the bay configuration, status, analogue measurands,alarms and bay level control.

Status supervision of switchyard equipment.


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Protection Healthy ( For Transformer and 33 KV Feeder) WhiteBus Potential indication ( All Phases, for 220 KV,132 KV and 33 KV) White

Colour of lenses for other functions would be indicated during detailed design stage.

5.1.4 Control SwitchesThe control switches shall be of rotary back connected type, having cam operated contact

mechanism. Contact mechanism stages shall be protected by transparent non-

inflammable cover of moulded dielectric material. The number way indicated is

approximate one and will be finalised after detailed design keeping sufficient spare (at

least 20%).

Type of Switch Specific Requirement

Circuit breaker Control Switch 1) 3 position with spring return to Neutral from both Close and Trip positions.

2) Shall have pistol grip handles and the handle shallturn clockwise for closing operations and anti-clockwise for tripping operations.

3) Red and Green escutcheon plates shall be providedto indicate ON and OFF operations of the switcheven when the handle has returned to the normalposition afterthe operation has been carried out.

4) The control springs shall be strong enough to preventany inadvertent operation due to light touch.

5) The switches would be provided with lost motion andsequence device.

6) The number of ways shall be such as to leave at least20% spare contacts of each type.

Isolator Control Switch 1) 3 position pistol grip type with spring return to neutraland lost motion device.

2) Escutcheon plates shall be provided

Protection Transfer Switch(for 33KV also)

1) Stay put ganged type with 20% spare contacts but atleast 48 ways spade handled (lockable)

2) Key to be disengaged only in normal position.

Auto Reclose Cut Off Switch 4 position, oval head, stay put type having SinglePhase, Single and Three Phase, Three Phase and NonAuto positions.

Carrier Cut Off Switch 2 position (On and Off) oval head, stay put type

Bus PT selector switch 3 position, oval head, stay put type

Parameter Selection Switch 4 position, oval head, stay put type

The rating of all switches shall not be less than 10 amps continuous and 150 amps

momentary direct current.


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5.1.5 Annunciation Unit

Solid state type alarm annunciation system shall be provided in each control board bymeans of visual and audible alarm in order to draw the attention of the operator to theabnormal operating conditions or the operation of some protective devices. Theannunciation equipment shall be suitable for operation on the voltages specified.

The details of inscriptions for the window block for different panels will be intimated at thetime of approval of drawings.

The annunciation shall be of visual and audible type. The visual annunciation shall be

provided by annunciation facia flush mounted on the top of the control panels. The

audible alarm shall be provided by alarm buzzer or bell. Preferably sound of bells/buzzer

shall be matched with existing sound of 220 KV system.

The annunciation facia shall be provided with translucent plastic window for alarm point

with minimum size of 35 mm x 50 mm. The facia plates shall be engraved in black

lettering with respective inscription which will be approved by the Purchaser. Alarm

inscriptions shall be engraved on each window in not more than three lines and size of

the lettering shall not be less than 5 mm.

Each annunciation window shall be provided with LEDs in parallel to provide safetyagainst lamp failure. Long life LED shall be used. The lamp circuit shall include series

resistor of adequate rating. The cover plate of the facia windows shall be flush with the

panel and shall be capable of easy removal to facilitate replacement of LED. The

transparency of cover plates and wattage of the lamps provided in the facia windows shall

be adequate to ensure clear visibility of the inscriptions in the control room having high

illumination intensity (500 Lux), from the location of the Operators desk.

TRIP AND NON-TRIP facia shall be differentiated. ALL TRIP facia shall have red colorand all NON-TRIP facia shall have white color.

Sequence of operation of the annunciator shall be as follow :

Alarm Condition Fault Contact Visual Ann. Audible Ann.

Normal Open Off OffAbnormal Close Flashing OnAccept PB pressed Close

OpenSteady OnSteady On

OffOff

Reset PB Closeopen

OnOff

OnOff

Lamp test Open Steady on Off

Visual and audible annunciation for the failure of DC supply to the annunciation systemshall also be provided and this annunciation shall operate on 230 Volts AC supply with

separate fuses. On failure of the power supply to the annunciation system for more than 2

or 3 seconds (adjustable), a facia shall light up and a bell shall sound. A separate pushbutton shall be provided for the cancellation of this audible alarm alone but the faciawindow shall remain steadily lighted till the supply to the annunciation system is restored.

The sound of the audible alarm (bell/buzzer) provided for this annunciation shall bedifferent from the audible alarm provided for the annunciation system.

A separate voltage check relay shall be provided to monitor the failure of AC supply (230 V

AC) to the scheme mentioned in the above Clause. If the failure of supply exists for more

than 2 or 3 seconds this relay shall initiate visual and audible annunciation (bell/ horn)

which shall have distinctly separate tone than that of DC fail.

The annunciation system described above shall meet the following additional requirements:

The annunciation system shall be capable of catering to at least 30 simultaneous

signals at a time.

One self-resetting push button shall be provided on each panel for testing the facia


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window lamps. Push buttons for testing flasher and audible alarm circuit ofannunciation system and for testing the annunciation supply failure monitoringcircuit shall also be provided. These testing circuits shall be so connected that whentest is being done it shall not prevent the registering of any new annunciation thatmay land during the test.

One set each of the following push buttons shall be provided on each panel as shownin the front view drawing:

Reset push button for annunciation system.

Accept push button for annunciation system.

Test push button to check the healthiness of the annunciation system.

The annunciation shall be repetitive type and shall be capable of registering the fleeting

signals. Auxiliary relay for annunciation system shall have adequate auxiliary potential free

contacts for use in event logger. The annunciation shall be suitable for operation with

normally open fault contacts which closes on the occurrence of a fault. For fault contacts

which open on a fault, it shall be possible at site to change annunciations from close to

fault to open to fault and vice versa.

Special precaution shall be taken by Contractor to ensure that spurious alarm condition

does not appear due to influence of external electromagnetic/electrostatic interference onthe annunciation wiring and switching disturbances from the neighbouring circuits withinthe panels.

5.1.6 Transducers

Transducers shall in general conform to IEC 60688. The transducer characteristics shallbe linear throughout the range of measurement. The transducer output shall be loadindependent and suitable for load resistance of 1000-1500 ohms. The transducer shallderive its auxiliary supply from the panel DC source.The voltage, frequency and currenttransducers shall have an output of 4-20 mA and the active and reactive power

transducers shall have an output of 4-12-20 mA. Voltage and Current transducers shall be ofaccuracy class 1.0 or better, Watt/ Var transducers shall be of accuracy class 0.5 of better,and frequency transducers shall be of accuracy class 0.2 or better. Galvanic isolation shallbe provided between input and output circuits. The transducer shall have a response timeof less than 1 second and its output AC ripple shall be less than 1%.

5.1.7 Name and identity Plates

All instruments, relays and other electrical devices mounted on the control panel shall beprovided with identity plates bearing the Manufacturers name, Serial number, Modelnumber and the electrical rating data.

Ten (10) mm wide plastic plates bearing suitable identification marks shall be fixed in the

interior of the switchboard, at the test blocks, at the fuse blocks and at the cableterminals. Similar plates shall be fixed to indicate functions of control switches, pushbuttons, indicating lamps, relays and other equipment not incorporated in the mimicdiagram etc. Suitable identification marks shall be provided for other instruments as well.

Fifty (50) mm brass or plastic plates bearing respective circuit designation (which will be

furnished later) etched in 30 mm letters and mounted suitably on the top of the front side

and back side of each panel shall be supplied and fixed in such a way that these can be

removed and refitted when desired.

5.1.8 Synchronising Trolley

Wherever called for in the approved specification, swinging type synchronising panel/synchronising trolley complete with running and incoming voltmeters, running andincoming frequency meters, syncroscope, synchronising check and guard relays,

synchronising switches, lamps etc shall be provided. Automatic synchronising device with


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inputs to speed and voltage control shall be provided if additionally asked for. The swingtype panel shall be mounted on the main panel with hinges and shall be so located as toenable easy operation of all breakers provided with synchronisation facility.Synchronisation trolley shall be provided on wheels with multipin plug and flexible lead.Sockets shall be provided on main panel wherever required for synchronising.

5.2 Protection (Note: IED : Intelligent Electronic Device)

Feature Description / Configuration

220KV

Type-I Type-II

5.2.1 Line Protection

5.2.1.1 MainProtection

IED(s)

Distance Protection-Two IEDs for eachLine.1) Main-I2) Main-II of make

other than Main-Iprotection IED.

Pilot Wire Current ComparisonDifferential Protection One IED foreach end of the Line.

5.2.1.2 BackupProtection IED

(Type-III)

Not required One Directional O/C and E/F IED foreach Line/Line end (Type-III) of makeother than Main Protection IED.

5.2.1.3 General Description (For all IEDs)

Type INumerical, fully discriminative, 3 phase, 3 steps directional distance protection, non-switched IED with 6 independent impedance measuring loops, for phase to phase, 3 Phase,double phase to Ground faults and single phase to ground faults.

Type-IINumerical, fully discriminative, 3 phase Pilot wire current differential protection non-switchedIED with 6 independent impedance measuring loops, for phase to phase, 3 Phase, doublephase to Ground faults and single phase to ground faults.Type-IIINumerical, fully discriminative, 3 phase directional over current and earth fault protectionIED.

5.2.1.4 General Requirement (For all IED Types)The features described under this section shall conform by all the IEDs.

1 Construction Modular

2 Mounting Flush Mounted3 Type Back connected draw out type or plug in type modular cases,

suitable for rack/panel mounting.For Draw out type, the provision of CT shorting shall beavailable when the IED is drawn out.

4 Measuring Unit Shall be able to measure true RMS values up to 10th

harmonicwith an accuracy of 0.1% under normal conditions. Themetering accuracy shall be well within 0.2% for directmeasurement.Measurement functions shall comprise of power systemmeasurement, supervision and reporting to the local HMI,monitoring software and to station level (i.e. IEC 61850).Continuous monitoring of active power, reactive power,currents, voltages, frequency, power factor, detailed fault dataetc. shall be present.


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Description / Configuration

220 KVFeature

Type-I Type-II Type-III

Accuracy class of the measuring unit should be equal to or better

than class 0.5.

5 Test Block/TestPlug

Test blocks/Test Plugs for in-situ testing of the IEDs shall be

incorporated in the IEDs. Insertion of the Test Plug shall cause:

1) Shorting of CT Circuit

2) Opening of VT Circuit (Applicable for Types I and II only)

3) Opening of Tripping Path

The line differential IEDs at both ends of the line shall be able to

be tested from one end.

6 I/O Device Adequate number of inputs/outputs (I/O) to comply with the I/Olist indicated in this specification. These I/O shall be freely

configurable.

Shall be provided with one extra isolated I/O module,

exclusively for Purchasers use.

7 Rating Auxiliary Supply : 220 20% V D.C Current coil : 1A/5A depending on relevant CT secondary

current .

The permissive thermal withstand(rms) on the current inputs shall

be

a) 2 times of rated current continuous.

b) 100 times of rated current for 1 second.

8 Communication Port

1) Rear Ethernet port for station level communication (IEC

61850).

2) RS 232/RS 485 /LAN port in the IED front for communication

with Base computer/Laptop9 IEC 61850

CompatibilityIEC-61850 compliant in all respect and interoperable with IEDs of

other manufacturers.

10 Self Monitoring Shall comprise of Self Monitoring Feature.

11 Display Shall facilitate displaying of the system parameters without theneed for any deciphering and changing the required parameters

through its front panel. However, such changes should have a

password access control.

Fixed and User configurable to allocate it for any critical fault /

event at site. Indications for Relay Healthy and Relay Faulty

shall be present.

Number of User configurable LEDs shall be such that toaccommodate at least the following events-

12 IED Front PanelLED

For 220 KV Type-I1) R-Phase Trip

2) Y-Phase Trip

3) B-Phase Trip

4) Z1 operated

5) Z2 operated

6) Z3 operated

7) Backup Directional Protection operated

8) LBB operated

9) VT fuse Fail

10) Power Swing Block11) Carrier Protection Operated

For Type-II1) R-Phase Trip

2) Y-Phase Trip

3) B-Phase Trip

4) LBB operated

5) Pilot Fail

6) Power Swing

Block

7) SOTF

operated

8) Auto Reclose


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Description / Configuration

220 KVFeature

Type-I Type-II Type-III

12) SOTF operated

13) Auto Reclosed

For 220 KV Type-III( to be used withType-II)1) R-Phase Trip

2) Y-Phase Trip

3) B-Phase Trip

4) Backup Non

Directional

Protection

operated

5) LBB operated6) VT fuse Fail

7) Power Swing

Block

8) SOTF operated

All the above configuration shall be changed as per site requirement.

13 Fault DataDownload

Downloaded fault data shall be possible to save in

COMTRADE format from a remote location with playback

facility of the downloaded waveform.

14 Distance to FaultLocator

i) The fault locater shall be microprocessor based On-line

type.

ii) It shall be suitable for breaker operating time of 2 cycles.

iii) It shall have built-in display unit.

The display shall be directly in percent of line length or

kilometers with out requiring any further calculations with an

accuracy of 3% or better for all type of faults and fault levels.

The above accuracy shall not be impaired under the following

conditions

a) presence of remote end in feed

b) predominant D.C. component in fault current

c) high fault ARC resistanced) severe CVT transients.

iv) It shall have facility for remote data transmission.

v) It shall have mutual zero sequence compensation unit if

fault locater is to be used on double circuit transmission

line.

15 IRIG-B /equivalent Input

Shall be provided with time synchronising inputs (IRIG-B or

equivalent) for receiving GPS UTC signal.

16 IED Case Case of the IEDs shall be so constructed and arranged thatany non-permanent deformation cannot prevent satisfactory

operation of the IEDs.


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5.2.1.5 Specific Requirement

5.2.1.5-A Main IEDs

1Distance/Differential Protection

Type IShall have Polygonal and circular characteristics (offset mho

type). It should cover at least line sections completely with

20% in hand

margin.

The Characteristic should be compatible to the line length with

provision for independent reactance setting, phase to phase

fault and phase to earth fault resistance setting.

The circular characteristic shall have the provision for Arc

Resistance Compensation.

i) The IED shall operate at maximum fault current of 40 KA

and a minimum fault current of 20% of rated current.

ii) Shall have residual compensation variable from 30-150%.

iii) Adjustable Forward & Reverse Offset feature shall be

provided in Zone-3 setting.

iv) The measuring unit shall not become inoperative evenunder very severe close in system fault conditions wherethe potential may collapse to zero. Sound phasepolarization and directional voltage memory should providedynamically unlimited directional sensitivity.

v) The protective IEDs shall be suitable for use with

electromagnetic Instrument Transformers.

Type-IIi) Shall have phase segregated high impedance current

differential protection suitable for EHV Overhead

Transmission Lines and Cables in solidly or impedance

grounded networks.

ii) The protection shall be of unit type and shall cover 100% of

the Line length.

iii) A restrained dual biased operate characteristic shall be

used and the highest phase current in any line shall be

utilized as bias current.

iv) Charging current compensation for increased sensitivity for

long lines or cables shall be included.

v) The IED shall be able to communicate with the remote end

IED.

vi) The communication channel shall be continuously

monitored and an automatic switchover to a redundant

channel shall be possible.

vii) For line differential communication it shall be possible toselect between a master-master system or a master-slavesystem depending on the functional or economicrequirements.

viii) An automatic switchover to master-slave communication

shall take place if an interruption occurs in onecommunication channel in a master-master


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communication system.

ix) Communication modules for dedicated communication for

short and long distances (>60 km) shall be available.

2 Zone Switching Zone switching to extend the reach of themeasuring elements is not allowed. The

reachof each zone shall be independently andindividually adjustable and shall havesetting in steps of 1% .

-

3 Zone selection Selection shall be so that the first zone ofthe IED can be set to about 80% - 90% ofthe protected line without any risk of non-selective tripping.

-

4 Zone Timer Two independent continuously variabletime setting range of 0 3 seconds forzone 2 and 0 5 seconds for zone 3.

-

5 Offset Feature Shall have adjustment upto 20 % of Zone 3 setting. -

6 ResidualCompensation

Shall have Residual compensation variablefrom 30 150%.

-

7 Memory Circuit Memory circuits with defined characteristics shall be providedin all three phases to ensure correct operation during close in 3phase faults and other adverse conditions.

8 Power SwingBlocking

Power Swing Blocking feature having suitable setting range toencircle the distance protection zones with an inbuilt timerhaving continuously adjustable time delay on pick up .The IEDshall block tripping during power swing conditions.

Shall have the provision to detect Singlephase/Two Phase/Three Phase VT fuse

failure. In case of VT fuse fail, theprotection shall inhibit tripping by distanceprotection / Backup directional Protection.The IED shall be configured in such a

9 VT Fuse Fail

For VT fuse fail ofeither Main-I orMain-II IEDs ,automatic switchingto Non-directionalProtection shallinhibit.

If a single set of VTfuse is used forsupplying potentialto Main and BackupIEDs ,the protectionshall automaticallyswitched to Nondirectionalprotection for boththe IEDs.

Not applicable

Single and Three Pole High Speed Auto Reclosing featureselectable by external ARCO switch.

10 Auto Reclose

Configuration :Single Pole HighSpeed Autoreclosing in theevent of tripping byZone-1 distanceprotection.

Configuration :Three Pole HighSpeed Autoreclosing in theevent of tripping byZone-1 distance

protection.

Configuration :Three Pole HighSpeed Autoreclosing in theevent of trippingby mainprotection.


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a) Configuration of the IED shall be such that, Autoreclose

should not operate in case of tripping through

i) Zone-2 and Zone-3 Distance Protection (For Type-I and

Type- II only)

ii) Backup Directional Over Current and E/F Protectioniii) Backup Non-Directional Over Current and E/F Protection

iv) Switch On to Fault Protection (SOTF)

v) Local Breaker Backup Protection (LBB)

vi) Bus Differential Protection

b) Variable Dead time range of 0.1- 60 seconds (minimum)

with maximum step size of 0.01 sec.c) Variable Reclaim Time of 1-600 seconds (minimum) with

maximum step size of 1.0 sec.d) In case of PLCC Out of Service, the IED shall be able for

Auto Reclose.e) IED shall have multi shot auto reclose feature but shall be

configured with single shot auto reclose.

11 Switch on to

Fault (SOTF)

The IED shall comprise SOTF feature with an internal timer

having variable time delay. For configuration of SOTF feature,contact of the TNC switch shall be used in such a fashion that

at the time of closing the circuit breaker the feature shall

initiate and remain active for the set time delay. Any further

close pulse/holding the TNC switch in Close condition for more

than the Set time of the feature, shall not affect the feature. In

case of any fault irrespective of Zone during the set time of

SOTF, the IED shall trip in Zone-1 time.

12 Carrier Protection Selection of the featureshall be done by

external CCO switch.

The IED shall be

configured inaccordance with the

principle of PUTT

(Permissive Under

reach Transfer Trip)

Scheme.

Configuration shall be

such that in case of

Zone-2 fault with

receive of carrier

signal from the remote

end IED ,

the IED shall trip inZone-1 time.Zone-1

shall be used as

carrier starter.Zone-1 extensionfacility shall beavailable in case of

PLCC is out of service.

The IED shall be able to

discriminate between

Carrier Channel Fail

and Carrier Out of

Service.

Not applicable


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13 Local BreakerBack Up /CircuitBreaker FailProtection

The protection shall deal with a situation where a circuitbreaker fails to trip following receipt of trip command fromassociated tripping relays. All the protections that trip directly

or indirectly the circuit breaker shall initiate the local breakerback up protection which after a suitable time delay shall

initiate busbar clearance.The protection would trip all circuit breakers connected to the

bus to which circuit with failed breaker is connected through the

associated protection DC trip bus wires and the isolator

auxiliary switches / switching relay contacts. Suitable

arrangement shall be provided to short the bus bar protection

check relay contact at negative side of the bus bar protection

scheme.

The protection shall not operate during the single-phase auto

reclosing period.

Separate alarm and indication from the local back upprotection shall be provided for each circuit.

The protective scheme shall include the necessary auxiliary

relays etc. required for the above tripping functions.

The LBB protection function for each circuit breaker shall be

connected through the communication LAN and also with the

bus bar protection at the bay level.

14 Parameter GroupSelection

Shall have Four(4) parameter group having individual groupsetting of parameters for protection.

15 CheckSynchronising /

Dead LineCharging

Check-synchronising and Deadline Charging Feature shall be

selectable by software. The check synchronising feature along

with a timer having variable time range shall be inbuilt in theMain Distance IEDs.

16 Inbuilt DirectionalO/C and E/FProtection

Shall consist of back-up Directional O/C

and E/F feature having IEC Definite Time,

Normal Inverse, Very Inverse, Extremely

Inverse Characteristics selectable by

software. Provision of keeping the feature

OFF shall also be present.

Not Applicable

Shall consist of back-up Non Directional

O/C and E/F feature having IEC Definite

Time, Normal Inverse, Very Inverse,

Extremely Inverse Characteristicsselectable by software. Provision of

keeping the feature OFF shall also be

present.

17 Inbuilt NonDirectional O/Cand E/F

Protection

The feature shall

not be activated

automatically in the

event of VT fuse

failure of only one

Main protections.

The feature shall be

activated

automatically in the

event of VT fuse

failure of the Main

IED(Type-II) and

Back Up IED (if one

set of VT fuse is used

for both the IEDs)

Not applicable


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5.2.1.5-B Backup Protection IEDs

All features detailed above for the Main IEDs except the features under section 5.2.1.5-A(1)-(6),(15) shall be available in the Backup protection IEDs.

Additional Guideline The maximum fault current could be as high as 40 KA but the

minimum fault current could be as low as 20% of ratedcurrent. The starting and measuring IEDs characteristics

should be satisfactory under these extremely varying

conditions.

The protective IEDs shall be suitable for use with

electromagnetic Voltage Transformers.

Insulation barriers shall be provided to ensure that transient

present in CT and VT connections due to extraneous sources

do not cause damage to IED circuits. The circuits must

comply with IEC recommendation for impulse withstand

values. Adequate measures shall be taken to ensure thatequipment is protected against voltage spikes occurring in

Aux. DC supply.

Disturbance Recorder, Fault Locator and Event Logger

function may be an integral part of line protection IED,

provided these meet specification requirements of the

respective clauses of these equipments.

5.2.2 Auxiliary Relays and Tripping Relays (Applicable for all scheme)

5.2.2.1 Tripping Relay

Trip function shall be through a high speed tripping relay of the instantaneous type(operating time not to exceed 10 ms) and shall reset within 20 ms. It shall be D.C.operated and have adequate contacts to meet the requirement of scheme, other functionlike auto-reclose relay, LBB relay as well as cater to associated equipment like eventlogger, disturbance recorder, fault locater etc. It shall be provided with operation

indications for each element coil.

5.2.2.2 Trip Circuit Supervision

The relay shall be capable of monitoring the healthiness of each phase trip-coils andassociated circuit of circuit breaker during ON and OFF conditions. The relay shall haveadequate contacts for providing connection to alarm and event logger. The relay shall havetime delay on drop-off not less than 200 ms and be provided with operation indications for

each phase.

5.2.2.3 DC Supply Supervision

The relay shall be capable of monitoring the failure of D.C. supply to which, it is

connected. It shall have adequate potential free contacts to meet the scheme requirement.

The relay shall have a time delay on drop-off of not less than 100 ms and be provided

with operation indicator / flag.

5.2.2.4 Auxiliary relays

Auxiliary relays may be electro-mechanical or static as deemed appropriate. The

auxiliary relays shall be designed for continuous operation at 220 VDC and shall

withstand 10% variation in rated voltage continuously. These shall generally be used forinter-locking and contact multiplication.


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5.2.2.5 Communication accessories

At least two numbers of compatible communication cables for communication of the respective

IEDs with Laptop/Base Computer, all necessary software for communication, configuration, setting

calculation(with setting calculation guide) of the IEDs shall be provided without any additional cost

implication to the purchaser .

6 Additional Equipment

In addition to the requirements stated herein the following shall be an integral part of theprotection system.

6.1 Time Synchronisation

One time synchronisation equipment shall be supplied which shall be located in the control

room and shall receive Coordinated Universal Time (UTC) transmitted through GPS for

time synchronisation of DRs, static energy meters, numerical protections and master

clock. Shall be complete in all respects including antenna, all cables, processing

equipment, etc.

All auxiliary systems and special cables required for synchronisation of the various

equipment shall work from the plant UPS system or from substation 220V DC supplies

only and the bidder shall clarify if any built in battery backup is provided in which case

same shall be of long life lithium batteries.

It shall be compatible for synchronisation of Event Loggers, Disturbance recorders and

SCADA at a substation.

The synchronisation equipment shall have 2 micro-second accuracy. Equipment shall give

real time corresponding to IST (taking into consideration all factors like voltage,

temperature variations, propagation and processing delays etc). Shall be immune tohostile electrical environment. Suitable protections are to be provided against lightning

surges and over voltages in power supply systems.

The system shall be fully tested to the relevant international standards such as IEC:60255.

One copy of all the test reports shall be enclosed with the bid.

The synchronisation shall have one millisec accuracy. Shall give real time corresponding

to IST (taking into consideration all factors like voltage, temperature variations,

propagation and processing delays, etc.).

The system should be able to track the satellites to ensure no interruptions of

synchronisation signals.

The output signal from each port shall be programmable at site for either hour, half hour,

minute or second pulse as per requirements. The equipment offered shall have 6 output

ports. Various combinations of output ports shall be from the following:

voltage signal: 3-5V continuously variable with 50ms minimum pulse duration.

potential free contact (minimum pulse duration of 50ms) and voltage rating of the

contact shall be 250VDC/240VAC max.

IRIG-B

RS232C/RS485

These output ports shall be compatible with the requirement of the equipment to besynchronised i.e. numerical relays. The master clock in the control room shall also be


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synchronised with the time synchronisation system.

The equipment should have a periodic time correction facility of one second periodicity.

The equipment shall also have real time display in hour, minute, second (24 hour mode)

and have a separate time display unit to be mounted on top of control panel having display

size of approx 100mm height.

7 Tests

7.1 Type Tests

Complete Type Test Reports from NABL accredited laboratory / Equivalent laboratory

abroad in respect of the following aspects shall be submitted with the offer.

The following type tests shall be conducted on the Protective relays.

1. High Voltage Withstand As per IEC-60255-5

i) Dielectric Withstand

ii) Impulse withstand

iii) Insulation resistance

2. Electrical environment -

i) Auxiliary supply test,dc interruption- as per IEC 60255-11.The relay or its

associated power supply is required to operate satisfactorily with a DC supply

voltage range of 220V 20%. The performance shall not be affected due to

- an interruption to the DC auxiliary supply of duration up to 10ms.

- AC component (ripple) in the DC auxiliary supply up to 5% of rated value.,

ii) High frequency disturbance as per IEC 60255-22-1

iii) Fast Transients as per IEC 60255-22-4

iv) Conducted electromagnetic field disturbance as per IEC 60255-22-6

v) Radiated electromagnetic field disturbance - as per IEC 60255-22-3

vi) Radiated emission as per IEC 60255-25

vii) Conducted emission - as per IEC 60255-25

viii) Electrostatic discharge as per IEC 60255-22-2, (Class III and IV)

ix) Surge immunity as per relevant IEC

x) Power frequency magnetic field as per IEC 61000-4-8

3. Atmospheric Environment-

i) Temperature as per IEC 60068-2-1-cold

IEC 60068-2-2- dry heat

ii) Humidity as per IEC 60068-2-3,IEC 60068-2-30

iii) Enclosure protection as per IEC 60529

4. Mechanical environment-

i) Vibration as per IEC 60255-21-1

ii) Shock and bump- as per IEC 60255-21-2

iii) Seismic as per IEC 60255-21-3

5. Relay characteristics, performance and accuracy test as per IEC 60255


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Steady state Characteristics and operating time.

Dynamic Characteristics and operating time for distance protection relays and

current differential protection relays.

6. Tests for rated burden as per IEC 60255-6

7. Conformance Testing as per IEC 61850-10

7.2 Routine Tests

During fabrication, the panels shall be subject to inspection by the Purchaser to assessthe progress of work as well as to ascertain that only quality raw material is used.Minimum three weeks notice shall be given to the Purchaser for witnessing the finaltesting of the complete equipment. The manufacturer shall furnish all necessaryinformation concerning the supply to the inspectors.

Routine test as per relevant BSS/ISS/IEC shall be carried out on each equipment, wiring inthe presence of Purchasers representative if so desired by the Purchaser. All test reportsshall be submitted for approval.

Testing and commissioning of the panels at site shall be carried out by the manufacturer

at no extra cost.

8 Co-ordination

The Bidder shall co-ordinate with the manufacturer/supplier of transformer, circuit

breaker, disconnecting switches and PLCC equipment for co-coordinating the control,protection and inter-locking scheme of these equipments at no extra cost.

9 Documentation

The manufacturer shall develop the necessary general arrangement and schematic drawingsadding necessary auxiliary devices, accessories, components etc which are required forsafe, efficient and proper operation.

The contract drawings shall cover but not be restricted to the following:

1. Dimensioned detail drawings of the panels showing front view, rear view and side

view.

2. Template for foundation and details of cable trench and cable holes in the foundation

platform. Elementary diagrams of all control, metering, protection, annunciation

and other circuits. All devices shall be numbered according to ASA or international

usage, which shall be separately coded.

3. Cabling and wiring diagram of the front and rear cubicles and interconnections

between them, ferrule number, device numbers, grouping for cable take off etc. shall

be distinctly shown.

4. Inter-connection diagram between switchboard and gear equipment, power

transformers, instrument transformers etc. showing clearly the connection between

the terminal blocks of the switchgear and control panel.

5. Dimensional outline, drilling diagram and special mounting arrangement, if any, of

each type of various devices on the switchboard.

6. Internal wiring diagram of all devices and elementary wiring of relay where internal

wiring is intricate.

7. Construction details of control switches, terminal block, test blocks etc.


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8. Dimensioned details of each unit cubicle complete assembly of panel.

9. Dimensioned front and rear view of the panels with instrument and device position

marked.

10. List of all equipments and devices.

11. Pictorial views of control switches, indicating instruments, test blocks, terminalblocks and exploded views of draw out type instruments and fuse blocks.

12. Schematic and wiring diagram of the protection scheme, synchronising circuit,

annunciator circuit.

13. All drawings shall also be submitted in reproducible format (preferably in AUTOCAD) without

any additional cost implication to the purchaser.

14. Illustrative and descriptive literature, general technical data and specifications ofeach and every type of relays, meters, instruments and other devices offered.

15. Literature describing construction, operation adjustment and rating specifications of

all the protection IEDs and auxiliary relays, recording instruments, metering

instrument, control switches etc.

16. List of spare parts, identification number of renewable parts of relays, instruments

and switches to enable the Purchaser to procure spare parts correctly at a later

date.

10 Packing and Forwarding

The control panels shall be shipped to site packed in wooden crates. All equipment shall be

divided, if required, into several sections for protection and ease of handling during

transportation. They shall be wrapped with polythene sheets before being placed in the

crates to prevent damage to finish. Crates shall have skid bottom for handling. Special

notations giving details regarding the Purchase Order, weight and handling symbols shallbe marked on the package.

PTO for specific requirements.


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11 Specific Requirements

DUPLEX PANEL - FOR 220 KV LINES

Sl.no. Instrument Quantity(For each Bay)

CONTROL PART

1 Strip Mimic 1 set

2 36 way microprocessor based annunciator with repeat alarm

contact and auxiliary relay

1 set

3 Semaphore indicators for earth switch 1 no.

4 Control switch for circuit breaker 1 no.

5 Control switches for isolators as per scheme

6 Indicating lamps as per scheme

7 Push buttons as per scheme

8 Ammeter with transducer 3 nos.

9 Line voltmeter with transducer (from 1-ph CVT) 1 no.

10 Wattmeter with transducer 1 no.

11 Varmeter with transducer 1 no.

12 Synchronising switch (lockable key type) 1 no.

13 Synchronising socket 1 no.

14 Protection transfer selector switch as per scheme

15 Auto-reclose selector switch as per scheme

16 Carrier selector switch 1 no.

RELAY PART

1 Main-I : Multifunction Distance Protection IED complete with

test blocks, trip relays, auxiliary relays to complete the scheme

1 set as per scheme

2 Main-II : Multifunction Distance Protection IED complete with

test blocks, trip relays, auxiliary relays to complete the scheme

1 set as per scheme

3 AC line under voltage relay for earth switch interlocking 1 no.

4 DC supply supervision relay 1 set

5 Circuit Breaker Trip circuit supervision relay 6 nos.

6 Trip relay circuit supervision for above 1 no.

7 High Speed Master Trip relay circuit for overall protection. 1 no.

8 Set of test terminal blocks for protection CT 1 set


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DUPLEX PANEL - FOR 220 KV LINES (PILOT DIFFERENTIAL REAYING)

Sl.no. Instrument Quantity(For each Bay)

CONTROL PART

1 Strip Mimic 1 set

2 36 way microprocessor based annunciator with repeat alarm

contact and auxiliary relay

1 set

3 Semaphore indicators for earth switch 1 no.

4 Control switch for circuit breaker 1 no.

5 Control switches for isolators as per scheme

6 Indicating lamps as per scheme

7 Push buttons as per scheme

8 Ammeter with transducer 3 nos.

9 Line voltmeter with transducer (from 1-ph CVT) 1 no.10 Wattmeter with transducer 1 no.

11 Varmeter with transducer 1 no.

12 Synchronising switch (lockable key type) 1 no.

13 Synchronising socket 1 no.

14 Protection transfer selector switch as per scheme

15 Auto-reclose selector switch as per scheme

RELAY PART

1 Pilot wire current Differential Protection IED complete with test

blocks, trip relays, auxiliary relays to complete the scheme.

1 set as per scheme

2 Numerical, fully discriminative, 3 phase directional over current

and earth fault protection IED complete with test blocks, trip

relays, auxiliary relays to complete the scheme.

1 set as per scheme

3 AC line under voltage relay for earth switch interlocking 1 no.

4 DC supply supervision relay 1 set

5 Circuit Breaker Trip circuit supervision relay 6 nos.

6 High speed trip relay . 1 no.

7 Trip relay circuit supervision for above 1 no.

8 Set of test terminal blocks. 1 set


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SPECIFICATION FOR METERING

EQUIPMENT

DAMODAR VALLEY CORPORATIONELECTRICITY DEPARTMENT

VIP ROADKOLKATA - 700054

1 Scope

This specification covers -

(A) Design, manufacture, assembly, inspection and testing at original manufacturersworks, supply on door delivery basis of Composite metering panels comprising :

i) Microprocessor-based CT/PT operated,3-phase, 3-wire unbalanced load, 0.2S Class

HT metering equipment for 220KV/132 KV Lines, HV/LV side of Power transformer.ii) Microprocessor-based CT operated, 3-phase, 4-wire unbalanced load,0.5S Class LT

metering equipment for single-station auxiliary / grounding transformer feeder.iii) Test terminal blocks for in-situ testing of the meters.iv) All accessories including Networking and software as detailed in the subsequent

paragraphs of this specifications.

B) This specification also covers the followings:

Establishment of communication setup for Remote Meter Readings.

Setting up of Central Computer system with well proven software and protocol for

data communication/processing.

Data collection from the energy meters and energy accounting and audit and MIS

reports generation.

Training of DVC Engineers on the project and take over the meter reading activities

and energy accounting and audit and MIS reports generation.

2 Standards

Equipment covered by this specification shall conform to latest issues the following

Standards:

1. IS 14697 : AC static Transformer operated Watt-hour and VAR-hour meters, class

0.2S and 0.5S

2. IS 9000 : Basic environmental testing procedures for Electronic and Electrical Items.

3. IEC 62052-11 : Electricity Metering Equipments (a.c)-General requirements, tests

and test condition.

4. IEC 62053-22 : Static meters for active energy (classes 0.2S and 0.5S)

5. CBIP Technical Report : 88 - Specification for AC static electrical Energy Meters.

6. CBIP Technical Report :111 - Specification for common meter reading Instrument.


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7. CBIP Technical Report: 93 - Study on tamper-proof methods for Energy meters.

8. CEA Regulation : 2006 - Installations and Operations of Energy meters.

9. IPC-A-610 : Acceptability of Electronic Assemblies

Meters conforming to other international Standards which ensure better performance

than the standards mentioned above shall also be considered. Salient points ofdifference between standards adopted and standards specified in this specification shallbe clearly indicated in the relevant schedule and copy of such standards along with theirEnglish translation shall be furnished with the offer.

3 Function

The metering equipment shall have at least the following functional features:

1. The energy accounting and audit meters shall also have the facility to measure, record

and display with date and time at least the following parameters. All electrical

parameters shall also be stored in a non volatile memory.

(a) Serial Number of the Meter(Display only)(b) CT ratio (Display only)

(c) PT ratio (For HT Meter only)

(d) Cummulative Active Energy

(e) Cummulative Reactive Energy

(f) Cummulative Apparent Energy

(g) Phase wise active power at peak KVA

(h) Phase wise reactive power at peak KVA

(i) Phase wise voltage at peak KVA

(j) Power down time

(k) Average power factor

(l) Line currents

(m) Phase voltages(n) Date and time

(o) Tamper events

2. The energy accounting and audit meter shall have data storage capacity for at least

35 days in a non-volatile memory.

3. Energy accounting and audit meters shall have facility to allow download of

parameters to Laptop/Desktop by suitable password protect software as well as

transmission of data over communication network to a local and remote computer.

4. The meters shall be totally sealed and tamper-proof, with no possibility

of any adjustment at site, except for a restricted clock correction.

4 PanelSimplex Metering Panels shall be of size approximately 2200 mm (height),700

mm(depth),800 mm(width) fabricated from minimum 2(two) mm thick steel sheet(CRCA)

totally enclosed , dust proof, weather proof and vermin proof, floor-mounted and self

supported vertical front , indoor type cubicle provided with an access door in two halves

at the back side with latch and locking arrangement . The bottom of the panel frame shall

be about 100 mm high tie space all around, shall be erected by means of evenly spaced

grout bolts projecting through base channel (MS) members of the frame, the panel shall be

provided with suitable cable entry arrangement through bottom plates. Panel inside shall

be painted with two coats of white enamel glossy paint and outside shall be painted with

two coats of light grey shade-631 of IS: 5 or equivalent international standards. The

degree of protection of panel shall be IP: 52. Panel wiring shall be standard switch board

type, single core (stranded, minimum 7 conductor) annealed copper wires, PVCinsulated suitable for tropical climate, FRLS type 1100 V grade.


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Wiring of PT circuit shall be with 1.5 sq. mm Cu and CT circuit with 2.5 sq. mm Cu

respectively with standard ferrules and ring type Cu lugs. Panel shall be provided with

common earthing rail that shall be connected with flexible GI strips with substation

earthing. Ground bus of galvanized iron bar not less than 5 mm by 25 mm shall be

provided along the back of panels, the ground buses shall be bolted to the frame of the

panel in such a way as to make good electrical contact with the panel. Hinged doors and

all equipment on the metering cubicle shall be connected to the frame with braidedcopper strip. Each metering panel shall contain the items and accessories listed at the

end of this specification.

Glass front panels with European standard swing frames and 19 inch rack mounting

are also acceptable.

5 General Requirement

Sl. Requirement HT Meter LT Meter

1 Type 3 phase, 3 wire static energymeter with measurement (active,reactive, apparent energies),calculation, recording, printing,communication, tamper recordermodules in a single unit.

CT operated 3 phase, 4 wirestatic energy meter withmeasurement (active, reactive,apparent energies),calculation,recording, printing,communication, tamperrecorder modules in a singleunit.

2 Accuracy Class 0.2S

The Meter shall start and

continue to register the Energy

flow at current value of 0.01

(1.0%) In and unity power factor.

When the voltage is applied with

no current flowing in the currentcircuit, the test output of the

Meter shall not produce more

than one pulse.

0.5SThe Meter shall start andcontinue to register theEnergy flow at current valueof 0.01 (1.0%) In and unitypower factor. When the

voltage is applied with nocurrent flowing in the currentcircuit, the test output of theMeter shall not produce morethan one pulse.

3 RatedCurrent(In)

1 A and 5 A 5A

4 Rated MaximumCurrent

1.2 In 1.2 In

5 Reference

Voltage(Vref)

110 V AC Pressure Coil Voltage: 415V

AC (4 wire directly fed) /240 VAC (Single phase directlyfed)

6 Auxiliary Supply Dual supply.

DC supply : 220 V 20%

AC supply : 110 V AC

For AC supply, auxiliary powershall be drawn from the threephases equally and the metershall be able to remain powered upwith availability of any two phases.

Dual supply.

DC supply : 220 V 20%

AC supply : From Pressure

supply 415V / 240V.For AC supply, auxiliarypower shall be drawn fromthe three phases equally andthe meter shall be able toremain powered up with

availability of any two phases.



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7 Power Consumption As per indicated IEC

8 Internal Battery Shall be present for running internal calendar, clock and otherimportant functions, whose life shall be at least 3 years. Thereshall be provision to indicate the health of the Battery.

9 Influence of supplyvoltage

As per indicated IEC

10 Voltage dips andshort interruptions


11 Influence of ShortTime Over current


12 Influence of selfheating


13 Influence of heating As per indicated IEC

14 Immunity toElectromagneticdisturbance


15 Radio Interferencesuppression


16 Insulation As per indicated IEC

17 Temperature range As per indicated IEC

18 Clearance andcreepage distances


19 Starting and runningwith no loadcondition


20 AccuracyRequirements

A Limits of error due

to variation ofcurrent


B Limits of error dueto other influencingquantities


C Limits of error dueto ambienttemperaturevariation


21 Data Storage Non volatile memory having a minimum retention time notless than 5 years.


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User programmable.

Minimum Available Range :

A) For 5 A Meter :50/5, 100/5, 150/5, 200/5,300/5, 400/5, 600/5,750/5,800/5, 1000/5,1500/5,1800/5 and 2000/5

22 CT Ratio

(For calculation purpose,use of any multiplication

factor is not permissible)

B) For 1 A Meter :

200/1,400/1,800/1,1500/1,

1600/1,1800/1and 2000/1

User programmable.

Minimum Available Range:

50/5, 100/5, 150/5, 200/5,300/5, 400/5, 600/5,750/5,800/5, 1000/5,1500/5,1800/5 and 2000/5

23 PT Ratio

(For calculation purpose,use of any multiplication

factor is not permissible)

User programmable.

Available Range :

33000/3/1103,132000/3/1103 and220000/3/1103

Not Applicable

24 Communication port a) Galvanic/ Optical Isolated Communication Port forconnecting the Laptop/Desktop for data transfer.

b) Pulse Output Front Port (for Active and Reactive) forcalibration purpose

c) Remote communication port both for Meterprogramming and Data collection.

25 Method of calculation ofApparent Power/ Energy TVM method

26 Integration period 15/30 minutes-user programmable.

27 Billing Period The Billing Period shall be24=00 hours of the lastday of the month.However, this shall beuser programmable forTOD Metering.

Not Applicable

28 CT/PT error compensation Shall have the facility to

compensate CT/PT Ratioand phase angle errors atdifferent load points.

Shall have the facility to

compensate CT Ratio andphase angle errors atdifferent load points.

29 Display The Meter shall have at least 8 digit LED/LCD display.The different parameters shall be cycled by a PushButton. Push Button operation shall have the higherpriority over the Auto Display. The display shall revertback to Auto Mode after a certain time after the lastpush button operation. The display shall contain at leastthe parameters as stated in Section(3) .The display shallhave adequate resolution depending upon the load. Fora lower value of CT ratio and/or low load, the unit of

active reactive / apparent energy shall be selectableaccordingly ,e.g for a low CT


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ratio the measurement unit for active energy shall be inKWh and for a moderate to high CT ration the sameshall be in MWh.

30 Billing report generation Suitable software shall beprovided for generation ofbilling report. If generation

of billing report takes placeas a result of resetting theMaximum demand , thatshall take placeautomatically on the lastday of the month at 24:00hrs. For calibration andconfiguration purpose,provision of forced reset ofmaximum demand by

password protectedsoftware and subsequentgeneration of part bill bybilling software shall bepresent.

Generation of billing reportin other suitable way(except resetting themaximum demand) shallalso acceptable.

Collection of billing data andgeneration of billing report

shall also be possible by theCentral Computer throughcommunication links.

Not Applicable

31 Software and security of

software

All software shall be compatible with latest version ofWindows Operating System and shall be passwordprotected. Provision for change of password bypurchaser shall be available. The software shall beconsidered as integral part of the metering equipment.

The software shall be considered as integral part of themetering equipment.

Details of software packages to be supplied is detailed as

follows :1.Reading Software

This Package shall consist of all necessary Software to

perform the following functions:

[A] Collection of Billing Data(For HT Meter), Load

Survey Data, information from the Meter after

identifying the make of the Meter and Meter Sl.

No. and store all the above data against each

Meter Sl. No. and Make.

[B] Display any of the above data collected on its

screen.

Processing the above data for preparation of Bill(For


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HT Meter), Load Survey Curve, Load Survey Chart(with Numerical Value), and Calculation of AveragePower Factor etc.

[C] Printing of Bill and Billing Data(For HT Meter),

Load Survey Curve, Load Survey Chart (withNumerical Values) etc. that has been processed in(C) above.

This Package shall also consist of Operating SystemSoftware, Anti-Virus Software, Self-monitoring Softwareand driver Software necessary to install in the BaseComputer/ Laptop.

2.Configuration Software

This Package shall consist of all necessary software to

configure the Meter to perform the following functions

:

[A] To programme the Meter Unit to act as Energyaccounting and Audit meter as per CEA

regulation: 2006.

[B] To programme the Meter to operate as a TOD

Meter or a non-TOD Meter(For HT Meter).

[C] To Change number of TOD Time Zone and its

timings (For HT Meter).

[D] To change the Integration Period.

[E] To change the CT ratio and PT ratio(For HT

Meter).

[F] To change the Billing Period(For HT Meter).

[G] To incorporate any change of the Name of the

consumer against Sl. No. of the Meter (if this

facility is available).

[H] To adjust the time of Internal Clock in case of

drifting.

[I] To perform any other special task, if any,

available in the offered meter.

3.Remote Communication

API (Application Programming Interface) to ensure that

the meter data is compatible with the software forEnergy accounting/Audit and MIS report generationinstalled at a remote server. Meter shall support IEC62056-21/DLMS protocol.

32 Meter Sealing Provision to seal the meter with all individual modulesin their working position shall be available, so that it isnot possible to draw out any of the modules withoutbreaking the seal (s).

33 Front Cover Preferably transparent with sealing facility. No internalpart of the meter shall be accessible without breakingthe seal.

34 Meter Case Case of the meter shall be so constructed and arrangedthat any non-permanent deformation cannot prevent


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satisfactory operation of the meter. The meter shall

Sl. Requirement HT Meter LT Meterconform to the degree of protection IP 51.

35 Terminal BlockThe Terminal Block of Meter shall be provided with aseparate cover that can be sealed independently. This

cover shall enclose the actual terminals, Conductor fixingScrews, a suitable length of the external conductors andtheir insulation and access to the terminals shall not bepossible without breaking the seal(s) of Terminal Cover.The cover shall not, in any way, touch the Terminalfixing screws or bare portion of external conductors.Material of the terminal block shall comply IS:11731,Part-I.

36 Clearance and CreepageDistances


37 Connection Diagram The connection diagram shall be marked on each Meter

in an indelible and durable manner. The diagram shallindicate the marking of Meter Terminals as well asphase sequence for which the Meter is intended.

38 Nameplate Following information shall be printed in an indelibleand durable manner:

1. Manufacturers Name and Type designation

2. Place and Year of manufacture.

3. Serial Number of Meter

4. Rated Voltage

5. Rated Current

6. Rated Frequency

7. Number of Phases and Number of Wires for which the

Meter is designed.

8. Meter Constant and Transformation Ratios of CT,

PT if included in Meter Constant.

9. Accuracy Class.

10. Auxiliary Supply Voltage

39 Time Synchronisation Synchronisation of time shall be possible from an

external source like GPS receiver/Central computer.The Internal Clock Shall feature 24 hours display withall consideration of a perpetual calendar.

40 Self Diagnostic feature The meter shall be capable of performing complete self-

diagnostic check to monitor the circuits for any

malfunctioning to ensures integrity of data memory

location at all time.

The meter shall have indication for unsatisfactory/non-satisfactory/malfunctioning of the following:

[A] Time and date on meter display.

[B] All display segments on meter display


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[C] Real time clock (RTC) status in meter reading

prints out at the Central computer station in

management information system.

[D] Non volatile memory (NVM) status in meter reading

prints out at the Central computer station inmanagement information system.

[E] The meter shall have self diagnostic feature toindicate healthiness or any disorder of differentmodules. Configurable pulse outputs shall beprovided for operation during any abnormal systemcondition or abnormal device condition causingalarm. Such alarm events shall be indicated onfront panel by LEDs and shall also be recorded andstored in non-volatile memory for retrieval throughlocal or remote communication.

41 Tamper Recording Device Following Tamper Data shall berecorded by the Tamper Recording Unit

to detect Tamper which can be down

loaded to Base Computer/Laptop.

1. Current reversals and outages.

2. Unauthorised M.D. reset other than

at the end of Billing Period (if MD

reset feature is provided).

3. Removal of P.T. circuits in 1-Phase /

2-Phase / 3-Phase.

4. Removal of current in 1-Phase / 2-

Phase.

5. Unauthorised Programme Operation.

6. Individual Phase Power Losses in

case of any Tamper.

7. Total Power Interruption.

8. Date and Time of last Tamper Reset

and Total Number of Tampers.

Snapshots of voltage, current, power

factor and energy readings as well as

date and time of logging of occurrence

and restoration of all the above

anomaly events shall be logged into

meter memory which shall be available

for retrieval through Base

Computer/LAPTOP. This retrieval shall

also be possible by the Central

Computer through communication links.

However, for total power interruption,

the power off and subsequent on time

should be logged with date and time.

Maximum number of tampering events

that can be stored in the meter shall beindicated.

NotApplicable


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6 Inspection & Testing

The equipment shall be tested at original manufacturers works in accordance with therelevant Indian, International standards in presence of Purchasers representative(s). TheSupplier shall give Purchaser at least fifteen days notice of the equipment being ready atworks for inspection. Routine test reports for all the equipment shall be submitted before

inspection. Additional Tests which are felt necessary by the Purchasers representative(s)for checking of satisfactory operation/ functioning of the meter under different system/siteconditions, but not included in the relevant standards may also be carried out duringinspection.

In case, inspection / test is carried out abroad at OEM works, then to and fro journey etcfor at least two engineers shall be borne by the contractor.

7 Documentation

7.1 Proof

The Bidder shall furnish proof of being the original manufacturer of the metering equipment.

7.2 Type Test Reports

Complete Type Test Reports from NABL accredited laboratory / Equivalent laboratoryaboard in respect of the following aspects shall be submitted with the offer for the offeredtype of meter :

a) Standard Electrical Values as per IEC 62052-11/ IS 14697

b) Accuracy requirements as per IEC 62053-22/ IS 14697

c) Electrical requirements as per IEC 62052-11/ IS 14697

d) Climatic Influences as per IS 14697.e) Mechanical requirement and tests including Vibration Test, as per IEC 62052-11/ IS

14697

f) Type test certificate of remote communication standards.

The above type test reports shall be complete in nature including drawings and diagrams

of the test meter.

7.3 Drawings, Literature

The manufacturer shall provide the following drawings and manuals along with their

equipment. The number of copies required and mode of submission are covered in the

SCC.All the routine and acceptance test reports shall be submitted to the appropriate authority

for scrutiny and approval before issuance of dispatch clearance. Detailed dimensional

drawings showing overall dimensions of each unit along with their mounting arrangement,

layout and panel cut-out details. Schematic wiring diagrams showing in detail the

connections to be made between different units.

Instruction manuals of each of the equipment(s) and supplied software shall be provided by

the bidder.


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8 Specific Requirements

METERING EQUIPMENT PANEL

Sl. Instrument Quantity

TYPE - 1

01 Microprocessor based static CT/PT operated, 3 phase 3 wire un-

balanced loaded, HT Energy meters, class 0.2S with associated

test terminal blocks installed in the front side and mounting of the

meters and TTB shall be panel flush type.

As per quantities

given in price

schedule

02 Terminal Boards, CATD M4 (disconnecting type) or equivalent for

CT/ PT circuit.

As per requirement

plus 20% extra

03 Terminal Boards stud type CATM6 or equivalent for other circuits

except CT/PT.

As per requirement

plus 20% extra

04 Potential supply complete fuse assembly, (3 fuses + 1 link) HRC 2A

rating.

4 nos for each meter

05 Complete fuse assembly :

i) Panel LTAC incoming single phase 240 V, 50 HZ supply

complete fuse assembly, 2 nos (1 fuses + 1 link). HRC 16A rating.

02 nos.

ii) Panel Space Heater supply single phase 240 V, 50 HZ supply

complete fuse assembly, 2 nos (1 fuses + 1 link). HRC 2A rating.

02 nos.

iii) Panel illumination single phase 240 V, 50 HZ supply completefuse assembly, 2 nos (1 fuses + 1 link). HRC 2A rating.

02 nos.

iv) Panel socket single phase 240 V, 50 HZ supply complete fuse

assembly, 2 nos (1 fuses + 1 link). HRC 6A rating.

02 nos.

06 Panel space Heater: 240V, 50 Hz, 100 W, of any reputed make. 01 no.

07 Thermostat (30 - 110 C), of any reputed make. 01 no.

08 Piano type switches , 240 V, 50 Hz , 6A As per scheme

09 Power supply socket(3 pin type) , 240 V , 50 Hz, 6A 01 no.

10 Panel florescent type illumination fittings, 240 V, 50 Hz, 20 W. 01 set.

11 Door limit switch. 240 V, 50 Hz, of reputed make. 01 no.

12 FRLS, PVC insulated, annealed Cu flexible panel wires, minimum

7 strands (2.5 sq.mm for CT and 1.5 sq.mm for PT circuit) as per

requirement.

1(one) lot

13 Lugs, nuts, bolts, washers, spring washers, channels, rails, and

PVC type perforated Cable dressing enclosures etc as per

requirement.

1(one) lot

14 Panel Earthing Rail and flexible GI strips for substation earthing

connection.

1(one) set.


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Sl. Instrument Quantity

TYPE - 2

01 Microprocessor based Static CT operated, 3 phase 4 wire, Direct

potential supply fed, LT Energy meters, class 0.5S with

associated test terminal blocks installed in the front side andmounting of the meters and TTB shall be panel flush type.

As per quantitiesgiven in priceschedule

02 Data concentration unit, desktop/Laptop computer, power supply

units and networking equipment if any

1 set

03 Terminal Boards, CATD M4 (disconnecting type) or equivalent for

CT/PT circuit.

As per requirement

plus 20% extra

04 Terminal Boards stud type CATM6 or equivalent for other circuits

except CT/PT.

As per requirement

plus 20% extra

05 Potential supply complete fuse assembly, (3 fuses + 1 link) foreach meter. HRC 2A rating.

4 nos for each meter

06 Complete fuse assembly :

i) Panel LTAC incoming single phase 240 V, 50 HZ supply

complete fuse assembly, (1 fuse + 1 link). HRC 16A rating.

02 nos.

ii) Panel Space Heater supply single phase 240 V, 50 HZ supply

complete fuse assembly, (1 fuse + 1 link). HRC 2A rating.

02 nos.

iii) Panel illumination single phase 240 V, 50 HZ supply completefuse assembly, (1 fuse + 1 link). HRC 2A rating.

02 nos.

iv) Panel socket single phase 240 V, 50 HZ supply complete fuse

assembly, (1 fuse + 1 link), HRC 6A rating

02 nos

07 Panel space Heater: 240V, 50 Hz, 100 W, of any reputed make. 01 no.

08 Thermostat (30 - 110 0C), of any reputed make. 01 no.09 Piano type switches , 240 V, 50 Hz , 6A As per scheme

10 Power supply socket(3 pin type) , 240 V , 50 Hz, 6A 01 no.

11 Panel florescent type illumination fittings, 240 V, 50 Hz, 20W 01 set.

12 Door limit switch. 240 V, 50 Hz, from Siemens or reputed make 01 no.

13 FRLS, PVC insulated, annealed Cu flexible panel wires, minimum

7 strands (2.5 sq.mm for CT and 1.5 sq.mm for pressure circuit)

as per requirement.

1(one) lot

14 Lugs, nuts, bolts, washers, spring washers, channels, rails, andPVC type perforated Cable dressing enclosures etc as perrequirement.

1(one) lot

15 Panel Earthing Rail and flexible GI strips for sub

substation spec

Documents