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ublic

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Jan.

200

3

Xian Electric Import & Export Co.,Ltd.No.20 Laodong Road, Xian 710082, Shaanxi,China

Tel: +86 29 8631701/8631757

Fax: +86 29 8623631

E-mail: xemc@xianelectric.com

http://www.xianelectric.com

SF6 GAS CIRCUIT BREAKER

40.5kV~550kV GCB

Xian Electric Import & Export Co.,Ltd.A Member of China Xian Electric Group

China Xian Electric Group ( XD for short ):

XD is the largest base for manufacturing complete sets of ultra-high voltage AC transmission

and transformation equipment in China.

XD is the largest base for manufacturing complete sets of ultra-high voltage DC transmission

and transformation equipment in China.

XD is the largest base for researching and developing complete sets of ultra-high voltage AC

& DC transmission and transformation equipment in China , and is appointed by the state as

the national profession center responsible for the quality supervision, examination and test.

XD is the largest base for exporting complete sets of ultra-high voltage AC & DC transmission

and transformation equipment in China.

Main Products

40.5-550kV Live Tank Type Circuit Breaker 1

40.5-550kV Dead Tank Type Circuit Breaker 13

40.5kV Vacuum Circuit Breaker 21

1

2

1. 363kV SF6 Iive tank circuit breakers

2. 550kV SF6 Iive tank circuit breaker

3. 252kV/300kV SF6 Iive tank circuit breaker

4. 252kV/300kV SF6 Iive tank circuit breakers

5. 126kV/145kV SF6 Iive tank circuit breaker

6. 126kV SF6 Iive tank circuit breakers

7. 40.5kV SF6 Iive tank circuit breaker

40.5-550kV LIVE TANK TYPE

CIRCUIT BREAKER

O=N

4 5 63 7

FEATURES

1 Superior interrupting capability

These breakers can cope with all known switching phenomena. The severe rate of rise of the recoveryvoltage by a short-line fault and the high recovery voltage peak by out-of-phase interruption are both cleanedby the efficiently designed interrupter.In magnetizing current switching, the overvoltage is less than twice the applied voltage. No restrike orreignition occurs in charging current switching.

2 Reliable insulating and current-carrying capability

Because of the isolation of the insulating medium (SF6 gas) from the atmosphere, the breakers have a reliableinsulating capability. SF6 gas does not deteriorate with age and it protects the insulators in the gas space. Italso protects the contacts from oxidization and other chemical reactions as SF6 gas is stable and inert whenused with most materials.

3 Reduced maintenance work

The unit construction of the breakers minimizes inspection and maintenance work. Since the spring operatingmechanism does not require compressed air, it seldom require inspection.

4 Reliable earthquake withstand capability

These live tank SF6 gas circuit breakers are substantially resistant to seismic shock since most parts of theinterrupter unit are made simple and light in weight.

RATINGS

Main Technical Data of 40.5~550kV Live Tank Type CB (Based on IEC)

Rated reclose operating dudy

Close-open time (ms)

Rated pressure of SF6 gas (MPa)

Leakage of SF6 gas (%/year)

O-0.3s-CO-180s-CO

40 60 40 50~70 40 ===40

0.45 0.50 0.60

================== 1%===================== 1% 1%

0.50 (31.5kA) 0.4 (25kA)

Rated voltage (kV)

Rated frequence (Hz)

Rated current (A)

Rated breaking current (kA)

Making current (kA)

Rated short-time withstand current 3s (kA)

Rated peak withstand current (kA)

Creepage distance (cm/kV)

40.5 72.5 126 145 252 300 363 550

50,60

1600/2000 2500 2000 / 2500 / 3150 4000 3150 / 4000 3150 3150 / 4000

25 / 31.5 25 / 31.5 31.5 / 40 31.5 / 40 40 / 50 40 40 50 / 63

63 80 80 / 100 80 / 100 100 / 125 100 100 125 / 160

25/31.5 (4s) 31.5 (4s) 31.5 / 40 (4s) 31.5 / 40 (4s) 40 / 50 (4s) 40 (3s) 40 (3s) 50 / 63 (3s)

63 80 80 / 100 80 / 100 100 / 125 100 100 125 / 160

2.5 2.5 2.5 / 3.1 2.5 / 3.1 2.5 / 3.1 2.5 / 3.1 2.5 / 3.1 2.0 / 2.5

1 min. power frequence withstand voltage (kV)

95 160 230 275 460 380 510 740

Rated lightning impulse withstand voltage (kV)

185 350 550 650 1050 1050 1175 1675

5 min, power frequence withstand voltage under zero-gauge pressure (kV)

Close time (ms)

Open time (ms)

Breaking time (ms)

== 100 150 100 100 100 = 100 100===== 100

=== 70 30 30======= 30 === 30 25 25 20

60 ================ 50====== 50 ====== 40

2 x 40.5 / 3 2 x 72.5 / 3 1.5 x126 / 3 1.3x145 / 3 1.5 x 252 / 3 1.3 x 300 / 3 1.3 x 363/ 3 1.3 x 550 / 3

To earth

To earth

To earth

=

Q=P

Spring operating mechanism

No. Item Unit Ratings

1 Voltage of control & auxiliary circuit V DC110 / DC220

2 Current of open winding A 5.8 / 2

3 Current of close winding A 3.3 / 2

4 Voltage of energizing motor V DC220 (AC220)

5 Voltage of heater V AC220

Pneumatic operating mechanism

No. Item Unit Ratings

1 Rated operating air pressure MPa 1.50

2 Locking operating air pressure of CB MPa 1.20 0.03

3 Unlocking operating air pressure of CB MPa 1.30 0.03

4 Air pressure of locking in auto reclosing operating duty MPa 1.43 0.03

5 Air pressure of unlocking in auto reclosing operating duty MPa 1.46 0.03

Number of breaks per pole

Close resistance (Ω/ phase)

Equipped mechanism

Weight of a CB (kg)

1 2

___ 400 20

Pneumatic or Spring Pneumatic

1400 1000 1200 / 1800 1400 / 2000 3500/4500 4500 7200 11400

Rated voltage (kV) 40.5 72.5 126 145 252 300 363 550

Pneumatic orSpring

or Hydrulic

Key

Live parts (moving parts)

Live parts (fixed parts)

lnsulators

Fixed main

contact

Fixed arcing

contact

Moving main

contact

Moving arcing contact Puffer cylinder

Piston

Fixed finger

Arc Nozzle

1 Interrupter

CONSTRUCTION

Generally 252kV and below SF6 high voltage circuit breakers by XD are typed in 1-break (per pole), notbeing equipped with parallel capacitors; 363kV-550kV are typed in 2-break (per pole) but being equippedwith parallel capacitors and close resistors. The driving unit for the close resistors is touched first and someoscillating energy on the circuit is absorbed by the close resistors so to control the close overvoltage.Onopening, the contact with the resistors is separated prior to the main contact.252kV and below SF6 high voltage CB are equipped with spring operating mechanism, and 252kV andabove with the pneumatic operating mechanism.The pneumatic operating mechanism takes compressed air as its driving power to do open operation ( A CBis equipped with a complete set of air compressing system), and to do close operation depends on springforce. lt is also equipped with a mechanical anti-tripping device, electric anti-tripping device, phase protectiveunit, SF6 density control unit and air pressure control unit.The spring operating mechanism takes spring force as its driving power to do either open or close operation.Before operation, the close spring is energized by the close spring that is performing the close operation. ltis also equipped with a mechanical anti-tripping device, electric anti-tripping device and SF6 density controlunit.

lnner construction of interrupter

S=R

Fig1. Closed position (closing spring charged)

2 Spring operating mechanism

Fig2. Open position (closing spring charged) Fig3. Closed position (closing spring discharged)

Trip spring

Closing spring

Cam

Ratchet wheel

Closing-holding latch

Closing trigger

Closing coil

open coil

Ratchet

Trip-holding latch

Trip trigger

Lever

interrupter

The design of this mechanism ensures the high performance required by reliable operation. The lever engagedwith the locking device, which is released when the trip coil is energized, is rotated counterclockwise by thetrip spring (Fig.1). The cam and the ratchet wheel engaged with the locking device, which is released whenthe closing coil is energized, are rotated counterclockwise by the closing spring. The lever is rotated clockwise,compressing the trip spring by torque from the cam (Fig.2). As soon as the closing sequence is completed,the closing spring is charged by the ratchet linked to the motor (Fig.3).

Opening operation (by compressed air)

--Opening signal is introduced to trip coil

--Lock system of linkage is released by plunger of trip coil

--Cylindrical valve is driven to open spring

--Moving contact connected to piston is pulled down

--Cylindrical valve is driven to ciose by linkage

--Compressed air in cylinder is exhausted through exhaust

port

Closing operation (by spring)

--Closing signal is introduced to closing coil

--Lock system of linkage is released by plunger of closing coil

--Holding latch becomes free and is released from pin ”A”

--Piston is pushed up by discharging of closing spring

--Moving contact connected to piston is driven to close

--Moving contact and piston are held by closing spring at

closed position

Fig1. Closed position

3 Pneumatic operating mechanism

Fig2. Open stage

Fig3. Open position

Trip coil

Trigger

Latch

Cylindrical valve

Compressed air(15kg/cm2)

Control valve

Closing spring

Valve seat

Shock absorber

Plunger

Exhaust port

Cylinder

Pin

Stationary contact

Moving contact

Air reservoirPiston

Trigger

Cam

Piston rod

Roller

Holding latchCompressed air

Closing spring

Shock absorber

Plunger

Exhaust port

Cylinder

Pin

Stationary contact

Moving contact

Air reservoir

Piston

Anti-pumping lever

Cam

Piston rod

Lever

Open coil

Compressed air(15kg/cm2)

U=T

Key 1. Upper terminal

2. Lower terminal

3. Bushing of arc chamber

4. Supporting bushing

5. Frame

6. Supporter

7. Level of concrete

8. Anchor bolt

9. Nameplate

10. Earthing plate

11. Cable hose ( 114)

12. Control box

13. Cable entrance

1

72.5kV SF6 Live Tank Type CB

2

3

4

5

6

9

8

B711

10

12

B

13

792

523

1595

280 280

240

1100 1100

2580

ø

OQM

PPM

OMR

OMM

OMM

QOQP

PNOP

OOMP

QRMS

730

B-B Foundition

DIMENSIONS AND FOUNDATION

Type

126 kV

145 kV

L2

3450

3500

L1

4806

4956

AA

240

1700

3780

140

ø80

iN

OOMM

A-A Foundition

iO

1700

PMM

Upper terminal

Lower terminal

Level of concrete

Bushing of arc chamber

Supporting bushing

Cable hose Supporter

Anchor bolt

Control box

Nameplate

Frame

Cable entrance

Level of concrete

250 250340

280 280

2000

Anchor bolt 1:20

250100

QMM

RM

QMM PM

M

OQM

QOM NQ

M

PNR

OMM

QUM

NQOM

Anchor bolt 8-M24

Pressure gauge,

counter,indicator

Earthing

terminal

126kV /145kV SF6 Live Tank Type CB

UQR

NMM

R805

NM=V

A

B

C

C

Entrance of

cable ø150

QRTU

TNQV

3000~4000 3000~4000

OOMM

Cable plate

A 1: 3

Anchor bolt 8-M24 Earthing terminal

NPUN

1525

760760

NMM

Cable

D-D 1: 15

5 6

15025020

1200670

100 250 190

4-ø18

150

100

ORM

NRM

NUM

SPM

SPM

TM

NOMM

STM

NNOM

NMM

QM

TR

OMM

QMQM

252kV/300kV SF6 Live Tank Type CB

b

5000

5000

a

4800

4800

With or without close resistor

With close resistor

Without close resistor

Type

363 kV

h

7000

6400

l

5242

5245

20-24m

1

2

1

3

22X1.5 T2-Y Copper pipe

A22: 3-way joint

A22: 1-way joint

A22: 1-way joint

B22X2G 1/2: 1-way joint

5

4

3

2

1

Close resistor

Supporting bushing

Capacitor

5

Entrance ofcable pipe

Ü

a

ä

OOMM

D

432

1240

D

820800X720

1

380

80150

b bC

1200150 250 1

Air pipe Cable

NRM

NMMM

UM

PMM

QRM

C

PMM

Anchor bolt

SPM

SPM

NRM

Cable

D-DC-C

1

1: 10

ORM

1: 20

150

363kV SF6 Live Tank Type CB

RM

NO=NN

b

8000

8000

a

6400

6400

With or without close resistor

With close resistor

Without close resistor

Type

550 kV

h

8300

7700

l

6490

6490

20-24m

1

2

1

3

22X1.5 T2-Y Copper pipe

A22: 3-way joint

A22: 1-way joint

A22: 1-way joint

B22X2G 1/2: 1-way joint

5

4

3

2

1

Close resistor

Supporting bushing

Capacitor

5

Entrance ofcable pipe

Ü

aä

OOMM

D

432

1240

D

820800X720

1

380

80150

b b

C

1200150 250 1

Air pipe Cable

NRM

NMMM ORM

UM

PMM

QRM

C

PMM

Anchor bolt

SPM

SPM

NRM

Cable

D-D C-C

11: 20

1: 10

550kV SF6 Live Tank Type CB

150

RM

1

40.5-550kV DEAD TANK TYPE

CIRCUIT BREAKER

1. 550kV SF6 dead tank type circuit breakers

2. 550kV SF6 dead tank type circuit breakers

3. 363kV SF6 dead tank type circuit breakers

4. 252kV SF6 dead tank type circuit breakers

5. 126kV/145kV SF6 dead tank type circuit breakers

6. 40.5kV/72.5kV SF6 dead tank type circuit breakers 2

2 4 53

NQ=NP

FEATURES

Besides those advantages the live tank type SF6 circuit breaker possesses, the dead tank type SF6 circuitbreaker has excellent anti-seismic and pollution-resisting capabilities. lt is also characterized by a compactconstruction and small occupation of space due to the current transformer that is equipped to the deadbreaker. The dead tank type SF6 circuit breaker is suitably used to such places where earthquake often takesplace and severe pollution exists, and also to higher elevation area.

RATINGS

Main Technical Data of 40.5~550kV Dead Tank Type CB (Based on IEC)

Rated voltage (kV)

Rated frequence (Hz)

Rated current (A)

Rated breaking current (kA)

Making current (kA)

Rated short-time withstand current 3s (kA)

Rated peak withstand current (kA)

Creepage distance (cm/kV)

40.5 72.5 126 145 252 363 550

50/60

1250 / 2000 1600 / 2000 / 3150

40 31.5 40 / 50 50 50 / 63

100 80 100 / 125 125 125 / 150

40 31.5 40 / 50 50 50 / 63

100 80 100 / 125 125 125 / 150

2.5 / 3.1 1.7 / 2.5 2.5 / 3.1 1.7 / 2.5 / 3.1 1.7 / 2.5

1250 / 2000 / 3150

2000 / 2500 / 3150

2500 / 3150/4000

6

1 min. power frequence withstand voltage (kV)

95 160 230 275 460 510 740

Rated lightning impulse withstand voltage (kV)

185 350 550 650 1050 1175 1675To earth

To earth

5 min, power frequence withstand voltage under zero-gauge pressure (kV)

Close time (ms)

Open time (ms)

Breaking time (ms)

Rated reclose operating dudy

Close-open time (ms)

Rated pressure of SF6 gas (MPa)

Alarm/lock pressure of SF6 gas (MPa)

Leakage of SF6 gas (%/year)

Number of breaks per pole

Close resistance ( Ω/ phase)

Equipped mechanism

Weight of a CB (KB)

========= 100=================== 150 100

30 30=============== 25 50 ======= 20

60 60===================== 50 40

0.3s-CO-180s-CO

40

0.5 0.6 0.5

0.45 / 0.40 0.55 / 0.50 0.45 / 0.40

=== 1 0.5 1

1 2

__ __ 400 20

Pneumatic or Spring mechanism Pneumatic mechanism

1500 1550 3400 17000 18000 24000

2 40.5 / 3 1.5 72.5 / 3 1.3 126 / 3 1.3 145 / 3 1.3 252 / 3 1.3 363 / 3 1.3 550 / 3To earth

40.5 72.5 126 145 252 363 550Rated voltage (kV)

NS=NR

DIMENSIONS AND FOUNDATION

L3

2

L6

A

160160

950

12801400

L4

NMQM

iN

iO

VOM

Fixing of anchor bolt

L5

L6

Mud

Earthing cable

Concrete base

Shim

Anchor bolt (4-M20)

Cement cast on second time

Cable ditch

40.5kV/72.5kV SF6 Dead Tank Type CB

1280 9201200

Earthing cable

A

A-A

RMM

PSR SM OR

L4

968

968

1060

L3

2028

2055

2080

Type L5

2087

2175

2340

L6

944

1032

1065

L1

2690

2840

2690

L2

3234

3385

3490

40.5 kV

72.5 kV

CT model

Outside

lnside

Outside

Supporter

20

80

3200

2

3

E

150

925

2000

1300

150X150

1460 1460

500

NRMM

PRVM

NQPM

NMMM

Fixing of anchor bolt

2030

1510

Mud

Earthing cable Concrete base

Shim

Anchor boltCement cast on second time

Cable ditch

126kV/145kV SF6 Dead Tank Type CB

δ22 Alu.alloy plate

NU=NT

Key 1. View window of open-close indicator,

operation counter and pressure gauge

2. CT

3. Nameplate

4. SF6 gas entrance

5. Air reservoir

6. Joint for connection with 3-phase air

pipe

7. Cable entrance

8. Operating mechanism

1

2

3

4

5

6915

8

I

7

A C

680

B

680

15201220

3000~4000

250

1500

2860

900

3000

-ø

PMM

QR

NQR

NMM

NOOM

PMM

ORRM

NOMM

RMMM

454545

QR

189

3000~4000

10070

PMM

PMM

250

350350 220220

NOOM

OMMM

NPMM

OTM

OTM

RMM

AA80

Second time cast mouth

Air reservoir

aÉéíÜ=ç

Ñ=Å~ÄäÉ=Ç

áíÅÜ

táÇíÜ=ç

Ñ=Å~ÄäÉ=Ç

áíÅÜ Casting mouth of cement when CB located

Ditch of air pipe

245

4000(5000)4000(5000)

252kV SF6 Dead Tank Type CB

PMM

PMM

Key 1. Wiring plate

2. Bushing

3. CT

4. Nameplate

5. Viewing window

6. Arc chamber

7. Air tank

8. Control cable

9. Operating housing

10. Air pipe

1

2

3

4

5

6

9

8

A

13

10

640

251

700 2

4000521

4000

(1434)

4000(5000)

(3350)

ø

NOMM

VMM

PRM

UOM

ESSVOF

NRMM

ENSOMF

PSMM

920

A-A

7

A

700

OSM

NTQM

NQPQ

O

RMM

RMM

RMM

NQPQ

OTM

OQMM

RMM

PMM

450250

251

1600

350

950251

PRM

(3530)4000(5000)

ø

(957)

UOM

TTM

USS

PQT

373 Air tank

Air pipe

860

Ditch of air pipe

Air tank

MudAnchor bolt

Cement caston second time

Cement caston second timeMud

Anchor bolt

Anchor bolt

Air tankAir pipe

Earthing terminal

700 2

363kV SF6 Dead Tank Type CB (single break)

OM=NV

Key 1. SF6 gas entrance

2. Earthing terminal

3. Air reservoir

4. Center of gravity

5. Terminal

6. Bushing

7. Bushing CT

8. Touch hole

9. Anchor bolt

10. Nameplate

11. Operating box

12. Foundation 8 air pipes

13. window of indicator counter and pressure gauge

1

23

4

5

6

200

8

A

7

1000 980

450

8000

2200

A

3160

PRM

QR

NQR

PMM

NSMM

OMM

TSMM=EUOMMF

OMMM

δ22 Alu.alloy plate

450

4545

QR

80

8000450450

PTM

1000

28022 215

QRMM

SMM

OMM

CA

450

Cable ditch 500

80008000

10

9

13

11

12

OQMM

D

70

X

320

200215

OQMM

NMMM

NMRM OUM

OMM

VUM

280

B

NTM

320

VUM

PNSM

EE E

Air tank

Anchor bolt M30X1000

Earthing terminal

ø170X320

Cableentrance

125

D

PNQR

Cableentrance

6100(6189)

1120

Air pipe450450

Anchorbolt

X

4725

R=1100R=1100

R=1100

Operating box

CL

GL

NMM

550kV SF6 Dead Tank Type CB

170X320

3756

FEATURES

1 High fault current breaking abilitiesA compact vacuum interrupter is used in the circuit breaker. lt is high reliable whenbreaking or making fault current and restrike free when interrupting capacitive currentsdue to optimized contact movement.

The 40.5kV is an outdoor VCB designed for system voltages up to 40.5kV and for ratedshort-circuit currents up to 31.5kA. The design incorporates a compact vacuum interrupterbased on the experience from previous interrupter design.

40.5kV

VACUUM CIRCUIT BREAKER

OO=ON

RATINGS

No. Item Unit Ratings

1 Rated voltage kV 40.5

2 Rated frequency Hz 50

3 Rated current A 2000

4 Making current kA 80

5 Rated breaking current kA 31.5

6 Power frequency withstand voltage kV Dry: 95; Wet: 80

7 Ratedr lightning impulse withstand voltage kV 185

8 Short-time withstand current kA/s 31.5/4

9 Peak withstand current kA 80

10 Rated pressure of gas (at 20) MPa 0.02

11 Mechanical duration times 10000

476

750750

OVTM

SUM

1820

760

DIMENSIONS

2 High dielectric strengthThe compact vacuum interrupter is installed in a SF6 outdoor bushing at atmospheric SF6 pressure. Thedielectric strength of the vavuum interrupter is little affected by circumstance.

3 Low maintenanceThe circuit breaker is operated by a motor charged spring operating mechanism.

4 Short installation periodEach element is pre-tested and shipped to installation site in the form of a few pre-assembled units.

The products are successful in operation in China, Malaysia, Pakistan, Thailand, Philippines, Burma, New

Zealand and etc.

SALES NETWORK

OVER THE WORLD

Number Rated voltage (kV) Number of bays

1

2

3

4

5

1

2

3

4

5

550

252

145/126 (Spring operating mechanism)

145/126 (Pneumatic operating mechanism)

72.5

550

363

252

145/126

72.5/40.5

50

1391

4771

2255

461

94

312

101

318

365

SF6 Gas Circuit Breakers Supply Including Units Under Manufacturing ( as of Dec.2002 )

Dead tanktype CB

Live tanktype CB