0260 573 PVE Y 233 03 Guaranteed Technical Particulars for GIS

DOC. No. : 0260-573-PVE-Y-233 (Rev.3)

Vendor Doc. No. : HS-09A-C (Rev.3)

GUARANTEED TECHNICAL

PARTICULARS

FOR

420kV 50kA

Gas Insulated Switchgear

CUSTOMER : NTPC TAMIL NADU ENERGY COMPANY LIMITED

PROJECT : NTECL Power Project (3X500MW)

(VALLUR Thermal Power Project-3X500MW)

20 October, 2009

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Project : VALLUR Thermal Power Project (GIS) Guaranteed Technical Particulars

. GIS Module

1. Name of manufacturer & address 1. Hyosung, Korea

2. Place of manufacture, inspection & testing 2. Changwon, Korea

3. Manufacturers type / designation 3. 420 HGS 50

4. Standard applicable 4. IEC 62271-203

5. Rated voltage (System voltage) kV 5. 400 (420)

6. System frequency Hz 6. 50

7. Maximum (continuous) service rated voltage kV 7. 420

8. Single phase or three phase design 8. Single phase

9. Normal current rating 9.

i) Generator Transformer feeder circuit Amp. i) 2000

ii) Line feeder circuit Amp. ii) 2000

iii) Bus coupler circuit Amp. iii) 3150

iv) Bus bars Amp. iv) 3000

10. Rated peak withstand current kA 10. 130

11. Short time current rating 11.

- 1 second rms kA 50

- 3 second rms kA -

12. Rated Lightning impulse withstand voltage kV(peak) 12. 1425

13. Rated Switching impulse withstand voltage kV(peak) 13. 1050

14. Rated one minute power frequency withstand voltage kV(peak rms) 14. 650

15. Maximum temperature rise over 50 deg. ambient deg C 15. 40

16. Thermal rating of current carrying parts at 420 KV for sec 16. 1

the rated symmetrical short circuit current

17. a) Features adopted for preventing burn through in the 17. a)

various enclosures of SF6 GIS Pressure relief device

b) Time in m sec to withstand an internal flashover ms b) 500

without burn through

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18. Design pressure of the enclosures for 18.

a) Circuit breakers MPa.G a) 0.803

b) Disconnectors MPa.G b) 0.674

c) Surge arresters etc MPa.G c) To be submitted separately

d) GIS duct MPa.G d) 0.674

e) VT MPa.G e) To be submitted separately

f) CT MPa.G f) 0.674

19. No of gas compartments 19.

a) Each line bay a) 5~6 / Bay

b) Each Generator bay b) 5~6 / Bay

c) Bus coupler bay c) 5~6 / Bay

20. a) Average leakage rate of SF6 gas %/year 20. a) 0.5 max

b) Quantity of SF6 gas required to completely charge kg b) Depend on layout

the 3-pole equipment including any tank storage

system

c) Quantity of SF6 gas required for largest gas kg c) 120 for CB compartment

compartment

d) Operating pressure bar d)

- Circuit breaker MPa.G 0.6

- Others MPa.G 0.5

- CT MPa.G 0.5

- VT MPa.G To be submitted separately

- Disconnector MPa.G 0.5

- SA MPa.G To be submitted separately

21. Creepage distance adopted for GIS/AIS termination mm 21. 14700

22. Heat generated in K.W. when the complete switchgear is kW 22. 2

operating at its rated capacity

23. a) Seismic level for which GIS is designed 23. a) 0.3G

b) Noise level in (dB) at distance of (m) b)

i) 0 i) 100

ii) 50 ii) 70

iii) 100 iii) 50

iv) 150 iv) 40

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24. Type and material of 24.

a) Breaker main contact a) Copper with silver coated

b) Disconnecting switch contact b) Copper with silver coated

c) Grounding switch contact c) Copper with silver coated

d) Busbars d) Aluminum

e) Internal bus contact e) Copper with silver coated

f) Enclosure f) Aluminum

g) Terminal pads g) Tinned copper

25. Dimensions 25.

a) Bus enclosure outside diameter mm a) 516

b) Bus enclosure wall thickness mm b) 10

c) Internal bus, outside diameter mm c) 120

d) Internal bus thickness mm d) 6

26. Whether GIS are dispatched filled with SF6 or required 26. To be filled at site

to be filled at site

27. Capacity of EOT crane in GIS building Ton 27. 5

28. Type and make of SF6 pipe coupling used 28. Non return valve

(BTX Korea or DILO Germany)

29. Type and make of mandatory maintenance equipment 29.

to be supplied

i) SF6 gas filling and evacuation plant (portable) i) 3-001-2-R001,DILO Germany

ii) SF6 gas filtering, drying, storage and recycling plant ii) B057R01,DILO Germany

iii) Operation analyzer with DCRM KIT iii) EGIL, GE Energy

iv) SF6 gas leak detector iv) 3-033-R002, DILO Germany

v) Gas analyzing equipments v) 3-032-R003,DILO Germany

30. Whether the following are enclosed 30.

a) Type test reports Yes/No a) To be submitted separately

b) Operation manual for equipments Yes/No b) To be submitted separately (0260-573-PVE-X-237)

c) Leaflets & literature bringing out salient features of Yes/No c) Already submitted during tender stage.

equipment offered

d) The details of control room building Yes/No d) Yes (As per civil scope)

e) The details of GIS building Yes/No e) Yes (As per GIS

Layout and civil scope)

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31. Details of equipments and procedure for conducting site 31. To be submitted separately

test (including power frequency. test) of the bay module It will be included in IOM manual.

as per IEC (Refer to 260-573-PVE-X-237)

32. Weight of the heaviest piece of equipment to be kg 32. 12000 (CB)

handled during installation on site.

33. SF6 GAS 33.

a. Name of manufacturer & address a. Allied Signal, USA /

Solvay, Germany

b. Standard applicable b. IEC 60376

34. Whether the common point of bus disconnectors Yes/No 34. No (Same compartment

alongwith Earth Switch has been brought out in a with BUS disconnector

separate compartment and earthing switch)

35. Whether provision exists for extension busbars on both Yes/No 35. Yes

ends

36. Details of arrangement provided to account for thermal Yes/No 36. Yes (Refer to

expansion for busbars enclosed layout drawing)

37. Details of earthing arrangement adopted for the GIS Yes/No 37. Refer to already approved

enclosed Foundation Drawing.

(Dwg. No. 0260-573-PVE-F-204)

38. Whether layout plan sections of each bay/equipment of Yes/No 38. Refer to already submitted

GIS/AIS indicating the complete arrangement enclosed Layout drawing. (Dwg, No. 0260-573-PVE-F-205)

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. EQUIPMENTS INCLUDED IN GIS A. Circuit Breaker

1. Name plate data 1.

a. Manufacturers name a. Hyosung, Korea

b. Type / designation b. Puffer, Dead Tank /

420 HCB 50

c. Standard applicable c. IEC 62271-100

d. Rated frequency Hz d. 50

e. Rated voltage kV e. 420

f. Rated current f.

i) Under normal condition kA A i) 2000 / 3150

ii) Under site condition kA A ii) 2000 / 3150

g. Number of poles per unit g. 3

h. Class (indoors) h. C2-M1

i. Number of interrupting chambers per pole i. 1

(No of breaks per pole)

j. Whether 3 pole or single pole design j. Single phase

k. Maximum Operating Voltage for guaranteed Breaking Capacity

kV Vdc k. 242

l. Duty cycle as per IEC M1/M2&C1/C2 l. M1-C2

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. GUARANTEED RATINGS A) Circuit Breaker

1. Making & Breaking 1.

a) Breaking Capacity a)

- Rated short circuit breaking Current KA(rms) kA 50

- Symmetrical component at highest system kA 50

voltage

- DC Component (%) % 60

- Asymmetrical breaking current at highest kA 65.6

system voltage

- Rated breaking MVA (Symmetrical) kA(rms) 50

- Breaking time secs 0.04

b) Making Capacity b)

- Rated making current kA 130

- Rated making MVA symmetrical kA(rms) 50

- Making time secs 0.01

2. Operating voltages of closing/opening coil 2.

- Maximum operating voltage Vdc 242

- Minimum operating voltage Vdc 154

3. Current ratings 3.

- Rated continuous current at 27 ambient temp. A 2000 / 3150 - Rated interrupting current for 1s. kA 50

- Rated symmetrical interrupting current kA 50

- Rated asymmetrical interrupting current kA 65.6

- Rated short circuit making current kA (peak) 130

4. Rated Insulation level 4.

a) One minute dry power frequency withstand voltage a)

i) Between live terminal and ground (kV rms) kV rms i) 650

ii) Between terminals with breaker contacts open kV rms ii) 815

(kV rms)

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b) 1.2/50 micro second impulse withstand test voltage b)

i) Between live terminal and ground (kV peak) kVp i) 1425

ii) Between terminals with breaker contacts open kVp ii) 1425(+240)

(kV peak)

c) 250/2500 micro second impulse switching surge c)

withstand test voltage

i) Between live terminal and ground (kV peak) kVp i) 1050

ii) Between terminals with breaker contacts open kVp ii) 900(+345)

(kV peak)

d) Line to ground power frequency withstand voltage kV d) 420/ 3 at gas pressure equivalent to atmospheric pressure

e) Minimum allowable moisture content in interrupting ppm/vol. e) 300

medium

f) Maximum total break time for any current upto rated f)

breaking current (ms)

i) For Test duties 2,3 & 4 at rated values ms i) 38

ii) For other duties at limiting conditions of ms ii) 42

voltage and pressure

g) Closing time ms g) Max.150

h) Minimum opening time under any condition with ms h) 15

limiting voltage and pressure (ms)

i) Maximum opening time under any condition with ms i) 18

limiting voltage and pressure (ms)

j) First pole to clear factor j) 1.3

5. Maximum temperature rise above ambient at rated load 5.

and voltage for

- Contacts K 34

- Hottest part K 34

6. Operating data 6.

- Rated operating duty cycle

a) Line Breakers a) O-0.3s-CO-3min-CO

b) Generator Transformers, & Bus Coupler b)O-0.3s-CO(-3min-CO)

Breakers * ( ) shall be related with system operation.

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- Reclosing duty cycle (Line Breakers) O-0.3s-CO-3min-CO

- Permissible tripping delay ms sec 1

- Maximum arc duration at

a) 10% rated breaking current ms a) 17

b) 30% do ms b) 15.7

c) 60% do ms c) 20.7

d) 100% do ms d) 24

- Closing time ms 105

- Total breaking time at

a) 10% rated breaking current ms a) 34.3

b) 30% do ms b) 33.4

c) 60% do ms c) 38.7

d) 100% do ms d) 42.1

e) Arc duration from separation of arc at contact e) 42.1

to instant of arc extinction for full rated

interrupting capacity.

- Longest time to interrupt current less than 25% ms 40

of rated symmetrical short circuit current from

energizing trip circuit

- Minimum time from arc extinction to contact remake ms 80

for auto reclosing.

- Minimum dead time for

a) 3 phase reclosing ms a) 72

b) 1 phase reclosing ms b) 72

- Maximum difference of time at opening of series ms N/A

contacts within one pole

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- Maximum difference of time at opening between ms 3.3

phases

- Maximum difference of time at closing between ms 5

phases

- Details of the curve enclosed for maximum opening N/A

time vs. 3 phase fault current

- Number of interruptions before scheduled Every 10 in rated 40kA Every 30 operation in rated 25kA

maintenance is required Every 100 operation in rated 15kA Every 2000 operation in rated currents

- Number of mechanical operations before scheduled 2000

maintenance is required

- Number of interruptions at rated S.C. current with 10

associated TRV without changing any parts.

- Description and frequency of scheduled maintenance required

- Ordinary Inspection : Either every 500 operation or 3 years - Conduct maintenance and inspection by utilizing service interruption without discharging SF6 gas - Detail inspection : Either every 2000 operation or 6 years - Conduct maintenance and inspection discharging SF6 gas

- Recovery voltage rate of rise at As per IEC62271-100 for the belows

a) Rated symmetrical interrupting current kV/ms a) 2.0

kV/ s b) 60 percent of rated symmetrical interrupting kV/ms b) 3.0

current kV/ s c) 30 percent of rated symmetrical interrupting kV/ms c) 5.0

current kV/ s d) 10 percent of rated symmetrical interrupting kV/ms d) 7.0

current data for Restrike voltage kV/ s - Amplitude factor (T100/T60/T30/T10) 1.4/1.5/1.54/0.9X1.7

- Phase factor 1.3

- Natural frequency Hz 50

- Rate of rise of restriking voltage (T100/T60/T30/T10) kV/ s 2/3/5/7 - Devices used for controlling RRRV N/A

- Devices used for uniform voltage distribution N/A

- Distribution of voltage across breaks N/A

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- Pre-insertion resistor (if applicable)

i) Value / pole (Ohms) / with tolerance i) N/A

ii) Minimum and maximum duration of insertion ii) N/A

per pole (ms)

iii) Thermal rating for the iii) N/A

C-1m-0-CO-2m-C-1m-O-CO for terminal fault

considering maximum resistance and time

setting

- Recovery voltage distribution between breaks in

percent of rated voltage

a) Single line to ground fault a) N/A

b) Interruption of short lines b) N/A

c) Switching off an unloaded transformer c) N/A

7. Operating Mechanism 7.

a) Type of operating mechanism for a)

i) Closing i) Hydraulic

ii) Opening ii) Hydraulic

b) Normal power consumption (w) at rated voltage of b)

i) Trip coil W i) 100

ii) Closing coil W ii) 265

7.1 Pneumatic operating mechanism 7.1

a) Rated operating pressure (kg/sq.cm) a) N/A

b) Rated of pressure for (kg/sq.cm) b)

i) Closing i) N/A

ii) Opening ii) N/A

c) Air Consumption at rated pressure for c)

i) Closing (m3) i) N/A

ii) Opening (m3) ii) N/A

iii) Close -Open (m3) iii) N/A

d) Pressure drop/metre length of piping d) N/A

e) Number and Capacity (m3) of breaker local air e) N/A

storage receivers

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f) No. of close operations for which sufficient air f) N/A

as available in local receiver

g) Capacity of compressor (m3/hr) and working g) N/A

pressure (kg/cm2)

h) Maximum time for which compressor can h) N/A

operate continuously (Minutes)

i) Time to fill i)

i) Air receiver after one C-O operation i) N/A

(Minutes)

ii) For making up of losses occuring in ii) N/A

4 hours (Minutes)

j) Pressure at which compressor j)

i) Starts (kg/cm2) i) N/A

ii) Stops (Kg/cm2) ii) N/A

k) Material of compressed air piping k) N/A

l) Inner & outer dia of piping (mm) l) N/A

m) Whether time totaliser for the compressor m) N/A

provided

n) Safety valve blow off at (kg/cm2) n) N/A

o) Alarm switch closes (kg/cm2) o)

i) Closing i) N/A

ii) Opening ii) N/A

iii) Auto reclose iii) N/A

7.2 Hydraulic operating mechanism 7.2

a) Rated pressure of oil in operating cylinder kg/cm2 a) 320

(kg/cm2)

b) Limits of pressure (kg/cm2) kg/cm

2 b) 275 (O Lock-out)

c) Quantity of oil (litre) L/phase c) 240

d) Details of monitoring arrangement for hydraulic d) Due to pressure switch

pressure as indicated pressure

settings

e) No. of close-open operation possible after loss e) 2 CO

of AC supply to drive motor

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f) Pressure drop starting from lowest pressure f)

at which motor starts for

i) C-operation kg/cm2 i) 5

ii) O-operation kg/cm2 ii) 15

iii) CO-operation kg/cm2 iii) 20

iv) O-CO-operation kg/cm2 iv) 35

v) 2CO-operation kg/cm2 v) 40

g) Time required to make up pressure upto loss of g)

nitrogen pressure after

i) C-operation sec i) 15

ii) O-operation sec ii) 60

iii) CO-operation sec iii) 75

iv) O-CO-operation sec iv) 135

v) 2CO-operation sec v) 150

h) Life expectancy & guaranteed leakage rate of year & %/year h) 30 & 0.25

nitrogen accumulators

7.3 Spring charged mechanism 7.3

a) Number of close open operations possible after a) N/A

failure of AC supply to motor

b) Time required for motor to charge the closing b) N/A

spring (minutes)

c) Whether indication of spring charged condition c) N/A

provided in central control cabinet

8. Motor Data 8.

a) Type a) AC Motor

b) Rating at site conditions (kW) kW b) 1.5

c) Rated voltage (V) V c) 415

d) Full load current (A) A d) 2.1

9. SF6 gas system

- Normal operating pressure bar 6

- Normal operating density g/cc 0.0462 (46.2Kg/m3)

- Weight of gas per breaker kg 65

- Lockout pressure bar 5.5

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- Alarm pressure bar 5.7

- Whether breakers work at single pressure or dual Single phase

pressure

- Type of SF6 gas flow (axial or radial) Axial

- Type of nozzles (single flow or double flow) Single flow

- Compression ratio for puffer action 4 time

- Quantity of compressed gas for puffer action kg 4

- Total volume of SF6 gas required per circuit breaker m3 4.3

at operating pressure.

10. Control power requirement 10.

- Tripping (3poles) current at rated supply voltage A 19.8

(220V DC)

- Closing (3 poles) current at rated supply voltage A 6.3

(220V DC)

- Tripping voltage range percent % 85~110

- Closing voltage range percent % 70~110

11. Heaters 11.

- Continuously current rating A 1.7

- Thermostat power rating A 1.7

12. Noise level in (dB) at distance of (m) 12.

i) 0 i) 100

ii) 50 ii) 70

iii) 100 iii) 50

iv) 150 iv) 40

13. Interrupters 13.

- Type of main contacts, arcing contacts & Aux. Multi finger type

contacts.

- Material of main contacts/arcing contacts, silver Copper with silver coated

coated or not

- Contact pressure kg/sq mm kg/sq mm 0.001

- Number of interrupters per pole 1

- Breaker length of an interrupter mm 1255

- Length of contact travel mm 260

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- Rate of contact travel at tripping m/sec 15.2

- Rate of contact travel at closing m/sec 105

14. Whether fixed trip or trip free 14. Trip free

15. Details of anti pumping device 15. Hydraulic operating mechanism has structurally anti-pumping capability

16. Maximum line charging breaking current with temporary kA A 16. 600

over voltage up to 1.4 p.u. (kA)

17. Rated small capacitive breaking current A 17. 600

18. Rated small inductive breaking current A 18. 50 as per requirement

- Generator transformer, Line & Bus coupler breakers (To be submitted the calculation/ Test report separately)

19. Rated characteristics for short line fault 19. Refer to the Annex I

20. a) Rated transient recovery voltage for terminal faults kV 20. a) 624

b)

Parameters as per IEC

parameters b) As per table 5 of IEC62271-100

21. Rated value of phase making current kA(rms) 21. 50

22. Max. interrupting capacity under phase opposition kA 22. 12.5

conditions

23. Maximum breaking Capacity under Kilimeteric faults and kA 23. 50

rated TRV characteristic (kA peak)

24. Maximum period between closing of first contact & last ms 24. 3.3

contact in a pole (ms)

25. Maximum pole discrepancy (ms) ms 25. 3.3 (open)

26. Capacity for interrupting in-rush current of transformer A 26. 500

27. Max. over voltage factor of the circuit breaker when 27.

switching off

a) Unloaded transformer a) 1.2

b) Loaded transformer b)1.2

c) Open circuited lines c) 1.2

d) Synchronous system d) 2

28. Details of operation counter 28. mechanically numeric

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counter

29. a) Number of auxiliary contacts per pole provided 29. a)

i) NO i) 20

ii) NC ii) 20

iii) Adjustable iii) N/A

b) Rated voltage of auxiliary contacts (V) Vdc b) 220

c) Current capacity of Aux. contacts c)

i) Continuous (Amps) A i) 20

ii) DC breaking with 20 ms time constant (A) A ii) 10

30. Partial discharge level at 1.1 Un/ 3 pC 30. 5 31. Radio interference level at 266 kV (rms) microvolt 31. Below 1000

32. Maximum impact loading on foundation during breaker kg 32.

operations under fault conditions.

i) Closed conditions ton i) 4

ii) Open conditions ton ii) +15

33. Seismic withstand value 33.

i) Vertical i) 0.3G

ii) Horizontal ii) 0.3G

34. Tests to be conducted by the supplier at works 34.

(whether enclosed)

a) Type tests Yes/No a) To be submitted separately

b) Routine tests Yes/No b) To be submitted separately through ITP for factory test

c) Tests to be conducted at site Yes/No c) To be submitted separately through ITP for site test

35. Overall dimensions (LxBxH) m 35. 3.4X1.7X4.5 (CB 3phase)

36. Weight of breaker complete with operating mechanism, kg 36.

bushing, frame work,

a) with SF6 gas ton a) 10.2

b) without SF6 gas ton b) 10

37. Descriptive bulletins and drawings of the circuit 37. Refer to 0260-573-PVE-B-219

breakers giving general details of construction.

38. Out of phase switching capability of the circuit breaker kA 38. 12.5

39. Comments regarding the suitability of the circuit breaker 39. Type tested by C2

for restrike free operation of power transformer carrying

full load current.

54919Oval

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40. Guaranteed time difference between the first pole and ms 40. 3.3

last pole operation timing.

41. Data on operating Coils 41.

(a) No. of trip coils/pole (No.) (a) 2

(b) No. of close coils/pole (No.) (b) 1

42. Details of the standard accessories to be supplied 42. GD, Manual handle

alongwith the breaker

43. No. of the enclosed drg. showing the control scheme of 43. Refer to 0260-573-PVE-L-234

circuit breaker

44. Details of the provision to be made on GIS to reduce H.V. 44. N/A

transients to acceptable values.

45. Guaranteed degraded values of B.I.L. switching surges 45. 80% of BIL voltage

and 50 Hz rated values during the life of equipment and the rated power

(Test data to support this guarantee to be enclosed Frequency for 30

by the bidder). years life time.

46. Whether the following are enclosed 46.

a) Type test reports Yes/No a) Yes

b) Operation manual for breaker Yes/No b) To be submitted separately

(0260-573-PVE-X-237)

c) OGA drawing of breaker Yes/No c) To be submitted separately

(GIS Dimension drawing)

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B) Disconnectors / Grounding Switches B-I Disconnector Switches

1. Manufacturers name & address 1. Hyosung, Korea

2. Type & designation 2. 420 SDSV, 420 SDSH

3. Standard applicable and duty M1/M2 3. IEC 62271-102

4. Rated Frequency Hz 4. 50

5. Whether all the 3 poles are gang operated 5. 3 poles grouped

6. Rated voltage 6.

i) Rated kV i) 420

ii) Max. permissible ii) 420

7. Dielectric with-stand capacity of Completely assembled 7.

DS and earth switch

a) One minute power frequency withstand test voltage a)

(kV) rms

i) against ground (kV peak) kV rms i) 650

- dry (kV rms)

b) 1.2/50 micro second impulse withstand test voltage b)

i) against ground (kV peak) kVp i) 1425

ii) across open contacts (kV peak) kVp ii) 1425(+240)

c) 250/2500 micro second switching surge withstand c)

test voltage (dry)

i) against ground (kV peak) kVp i) 1050

ii) across open contacts (kV peak) kVp ii) 900(+345)

d) Radio interference level at 1.1 x Um/ 3 (in micro d) Below 1000 volts) for frequency between 0.5 MHz to 2.0 MHz

8. Rated normal current 8.

- Generator Transformer module A 2000

- Line module A 2000

- Bus coupler module A 3150

9. Rated peak short circuit current kA 9. 50

10. Interruption of loop current A/V 10. 1600A at 20V

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11. a) Rated short time current of DS 11. a)

i) for 1 sec. (kA rms) kA rms i) 50

ii) for 3 sec. (kA rms) kA rms ii) N/A

iii) Dynamic current kA iii) 130

b) Opening time of b)

i) DS (sec) i)

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c) Arrangement provided to prevent electrical or c) Provision for padlocking

manual operation unless interlock conditions are both open & close position /

satisfied Isolating control circuit

using device for preventing

manual handle from inserting

d) Whether interlock coil is continuously rated d) No

e) Rated D.C. control voltage and variation allowed V and % e) 220 and 80~110

f) Power consumption (watts) f) Almost zero

20. Controls 20.

a) Rated D.C. control voltage (Volts) Vdc a) 220

b) Limits of voltage Vdc b) 176~242

c) Power consumption of control coils (W) W c)

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d) Auxiliary contacts on earth switch d)

i) Total number i) 22

ii) NO ii) 11

iii) NC iii) 11

iv) Adjustable iv) N/A

v) Rated voltage (volts) Vdc v) 220

vi) Rated continuous current (Amps) A vi) 20

vii) Rated DC breaking current with 20 ms time A vii) 10

constant (A)

e) Whether counter balance spring provided for e) N/A

isolator and earth swtich

22. Design data 22.

- Type of contacts Multi finger

- Contact area cm2 28.3

- Contact pressure 1.2 / segment

- Surface treatment and thickness of surface coating Silver plated by 25 m for main contacts

/ silver electrolytic plating.

- Overtravel distance after making of contacts mm 12

- Distance between the contacts in the fully open mm 160

position

- Current density at the minimum cross section of A/mm2 0.7

switch blade (Silver coated copper)

- Speed of break m/s 0.1

23. Partial discharge level at 1.1 Un / 3 pC 23. 5 24. a) Total operating time of disconnector along with its secs. 24. a) < 5

operating mechanism

b) Total operating time of disconnector after the secs. b) < 5

command is given

25. No. of operations the switch can withstand without any 25. No load 1000 time

need for inspection

26. Type of mounting 26. Vertical type

27. No. of poles per phase 27. 1

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28. Safety factor taken into account while designing the 28. 1.2

disconnector.

29. Type and material used for arcing contacts, if provided 29. Tungsten

30. Weight of 3 pole isolating switch 30.

- with earthing blades kg 200 (Include in GIS)

- without earthing blades kg N/A

31. Type of interlock between main isolator and earthing 31. Electrical interlock

switch

32. Details of the type test reports enclosed and the 32. As per IEC62271-102

standards as per which these tests have been carried out

33. Rated maximum time duration of short circuit ms 33. 1000

34. Rated mechanical terminal load. kg 34. 30

35. Rated supply voltage of operating devices and auxiliary Vdc 35. 220

circuits.

36. Rated pressure of SF6 gas bar MPa.G 36. 0.5

37. Minimum distance between poles with regard to insulation mm 37. 160

and forces caused by short circuit currents.

38. Tests to be conducted at site Whether the following are 38.

enclosed:

a) Type test reports Yes/No a) To be submitted separately

b) OGA drawing for disconnecting switches with & Yes/No b) Refer to the Doc. No. 0260-573-PVE-B-214

without earth switches

c) Operation manual Yes/No c) To be submitted separately (0260-573-PVE-X-237)

d) Details of motor operating mechanism Yes/No b) To be submitted separately (0260-573-PVE-X-237)

e) Leaflets & literature bringing out salient features of Yes/No e) Already submitted

equipment offered during tender stage

f) Whether details of constructional interlock enclosed Yes/No f) No (N/A for constructional interlock)

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B-II Safety Grounding Switches


2. Type / designation 2. 420 SESM


4. Maximum permissible operating voltage kV 4. 420

5. Maximum make and carry current for one sec. kA (peak) 5. 50

6. Rated inductive breaking current A 6. N/A

7. TRV caused by breaking/making inductive current kV 7. N/A

8. Rated capacitive breaking current A 8. N/A

9. TRV caused by breaking/making capacitive current kV 9. N/A


a) Rated torque of the mechanism kg.f.m a) 1.5

b) Type and rating (KW) of motor b) DC Motor / 260W

c) Rated voltage of motor Vdc c) 220

d) Full load current (A) A d)

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22. Whether the following are enclosed: 22.

a) Type test reports a) To be submitted separately

b) OGA drawing for disconnecting switches with & c) Refer to the Doc. no.

without earth switches 0260-573-PVE-B-215

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B-III High Speed Fault Making Grounding Switch


2. Type/ designation 2. 420 SESA


4. Maximum permissible operating voltage kV 4. 420

5. Maximum make and carry current for 1 sec. kA(peak) 5. 50

6. Rated inductive breaking current A 6. 160

7. TRV caused by breaking/making inductive current kV 7. 10

8. Rated capacitive breaking current A 8. 18

9. TRV caused by breaking/making capacitive current kV 9. 20


a) Rated torque of the mechanism kgfm a) 1.5

b) Type and rating (kW) of motor b) DC Motor / 260W



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27. Auxiliary contacts on earth switch 27.

i) Total number i) 22

ii) NO ii) 11

iii) NC iii) 11

iv) Adjustable iv) N/A

v) Rated voltage (volts) Vdc v) 220

vi) Rated continues current (Amps) vi) 20

28. Total operating time of switch alongwith its operating s 28. < 5

mechanism

29. Total operating time of switch after the command is given. s 29. < 5


a) Rated torque of the mechanism kgfm a) 1.5

b) Type and rating (KW) of motor b) DC Motor / 260W



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C) CURRENT TRANSFORMERS (Bidder to fill up date separately for each type of CT)

1. Name of manufacturer 1. Hyosung, Korea

2. Type 2. Ring type

3. Manufacturers type / designation 3. 420 HGS 50 GIS type


5. Mounted inside/outside SF6 Gas enclosure 5. Inside

6. Rated frequency 6.

Rated continuous normal current (A) A 2000 / 3000

7. Short time current withstand for 1 sec. (kA) kA 7. 50

8. Dynamic current withstand (kA peak) kAp 8. 130

9. Transformation Ratio 9. 2000/1000/500:1, 3000/2000/1000:1

10. Rated primary current 10. 2000 / 3000

11. Rated secondary current A 11. 1

12. Numbers of cores. 12. 5

13. Number of secondary turns 13. 2000 / 3000

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14. Particulars of for each type of C.T. Refer to the Annex V

1 2 3 4 5

CORE Rated output (VA) Class of accuracy Accuracy limit Current error at

rated primary

current (%)

Refer to the next page Refer to the next page Refer to the next page As per IEC standard 6 7 8 9

CORE Phase displacement Composite errors at Knee point Secondary limiting

at rated primary cement rated voltage (V) (Volts) voltage

current (minutes) accuracy limited it

primary current.

As per IEC standard Refer to the next page Refer to the next page Refer to the next page 10 11 12

CORE Secondary winding Magnetising current Instrument

resistance (ohm) (mA) at knee point security factor

voltage

Refer to the next page Refer to the next page Refer to the next page

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15. One second over current factor & corresponding value of kA 15. 50

current.

16. Rated dynamic current (peak value) in amps. kA 16. 130

17. Rated continuous thermal current temperature rise over K 17.

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D) VOLTAGE TRANSFORMERS

1. Name of manufacturer 1. Nissin Japan, Trench

Germany or equivalent

2. Type designation 2.


Wdg Wdg Wdg 4. Rated primary voltage kV 4. 400/ 3 5. Rated secondary voltage V 5. 110/ 3 110/ 3 110/ 3 6. Rated output per phase VA 6. 50 50 50 7. Rated burden VA 7. 50 50 50 8. Rated frequency Hz 8. 50 9. Standard values of rated voltage factor 9. 1.5Un-30sec. 1.2Un-continuous 10. Limits of temperature rise K 10.

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E) SURGE ARRESTORS

1. Manufacturer 1. Toshiba, Japan

2. Type designation 2. RVLRF-390KY

3. Arrestor Class & Type 3. Gapless (Metal oxide)

4. Rated Voltage of Arrestor kV 4. 390

5. Normal Maximum continuous operating voltage (MCOV) kV 5. 315

6. i) Minimum discharge capability (kj/kV) reffered to 6. i) 8

rated voltage at minimum of discharge

characteristics

ii) Line Discharge class, as per IEC ii) Class 4

7. Maximum discharge current (8/20 microsecond wave) kA 7. 20

8. Maximum 0.5 microsecond discharge voltage kVp 8. 1055 at 20kA Front steepness : 1 micro sec

9. Maximum residual voltage for 8/20 micro sec current 9.

wave

i) at 50% nominal discharge current (kVp) kVp i) N/A

ii) at 100% nominal discharge current (kVp) kVp ii) 898 at 10kA

iii) at 200% nominal discharge current (kVp) kVp iii) 960 at 20kA

10. Maximum switching surge protective voltage kV(peak) 10. 790 at 2kA

11. a) One minute power frequency (dry) withstand voltage kVrms 11. a) 630

of arrester (kVrms)

b) Impulse withstand test voltage of arrester housing kVp b) 1425

with 1.2/50 micro sec wave, (kVp)

c) Impulse current withstand c)

i) High current short duration (4/10 micro sec. kAp i) 100

wave ) kAp

ii) Low current short duration (A peak) Ap ii) 1200

12. Partial discharge level at 1.1 Un/ 3 pC 12. 5 13. Radio interference level at 266 KV (rms) Microvolts 13. N/A

14. High current short duration test value kA 14. N/A

15. Short circuit capability & class of pressure relief device 15. 50kA / Class A

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16. I) Maximum internal ionization at 50 Hz voltage 16. equal to

i) 1.05 COV i) N/A

ii) 1.0 COV ii) N/A

17. a) Reference voltage and corresponding reference 17. a) 592 at 3mA

current of arrester

b) Maximum internal leakage current at (mA) b)

i) COV i) Approx. 1.0mAp at

420kV / 3 X 2 ii) 1.1 COV

ii) Approx. 1.1mAp at

420kV / 3 X 2 iii) COV at 150 deg. C iii) To be submitted separately

iv) Reference voltage iv) 592 at 3mA

c) Pressure relief class c) Class A

18. Protective level provided by surge arrestor 18. A

19. Energy level kJ/kV 19. 8

20. Details of the type test reports enclosed and the 20. As per IEC60099-4

standards as per these tests have been carried out

21. Whether SF6 Gas insulated Yes/No 21. Yes

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F) SUPPORT & BARRIER INSULATORS (Details for each type of insulator used to be indicated separately)

Support Barrier

1. Manufacturer & address 1. Hyosung, Korea

2. Type of insulators used 2. Epoxy Resin

3. One-minute power frequency dry withstand test voltage kV(rms) 3. 650 650

4. Dry flashover value kV(rms) 4. >715 >715

5. Wet flashover value kV(rms) 5. N/A N/A

6. 1.2/50 microsecond lightning impulse withstand test kV(peak) 6. 1425 1425

voltage

7. Creepage distance mm 7. N/A N/A

8. Puncture value of insulator in SF6 gas kV(rms) 8. >650 >650

9. Weight of insulators in the SF6 GIS enclosure. kg 9. 10 50

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G) GROUNDING CONNECTION

a. Type of conductor a. Tinned Copper band

b. Arrangement for connecting conductor to ground b. Refer to the Dwg. No. 0260-573-PVE-F-204 /205

c. Type of painting, if any required to be carried out at end c. Paint with black color

points of ground riser

H) DESIGN CLEARANCE

Minimum insulating clearances at nominal rated SF6 gas

pressure and rated voltage/BIL voltage for the following :

a) Main bus to ground mm a) 200

b) Circuit breaker b)

- Contact to ground mm 100

- Across the contacts mm 190

c) Isolator switches c)



d) Safety grounding switches d)



I) TOLERANCES

1. Tolerance (vertical & horizontal) and at interface of SF6 to mm 1. 10

Transformer oil bushing

2. Tolerance (vertical & horizontal) and at interface of SF6 2. N/A

to GIS bus Reactor bushing

TECHNICAL CLARIFICATION

CUSTOMER : NTPC TAMIL NADU ENERGY COMPANY LIMITED

PROJECT : NTECL Power Project (3X500MW) (VALLUR Thermal Power Project-3X500MW)

Drawing No. : 0260-573-PVE-Y-233 (GUARANTEED TECHNICAL PARTICULARS)

Sl.

No

Spec. No.&

Clause Specification Requirement Hyosung Clarification Remark

1 0260-573-PVE-Y-

233 Page 16 of 34 41. No. of closing coils/pole(No.) : 2

We would like to clarify that No. of closing coil is 1

instead of 2.

In revision 2, 2(No. of coil) is typographical errors.

2009-10-26T09:34:37+0530NTPCEOCTIKARAMCAT I

Date post:	31-Oct-2015
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0260 573 PVE Y 233 03 Guaranteed Technical Particulars for GIS

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