GW22A Single Column, Single Arm, Vertical Expansion HV AC Disconnector
Product Characteristics
For this series of disconnector, the voltage ranging from 72.5kV to 550kV, the GW22A type disconnector, single column, single arm, vertical expansion, comprises three mono poles and each of which is presented as the single-column structure. It’s composed of the base, the supporting insulator, the rotating insulator, the main blade, the fixed contact of the main blade, etc. The main blade shall be equipped with the CJTKA motor mechanism; the earthing blade shall be equipped with CS31A manual mechanism.
Product Parameters

No.

Name

Unit

GW22A-72.5

GW22A-126

GW22A-145

GW22A-170

GW22A-252

GW22A-363

GW22A-420

GW22A-550

1

Rated voltage

kV

72.5

126

145

170

252

363

420

550

2

Rated current

A

2000/3150

2000/3150/4000

2000/3150/4000

2000/3150

2000/3150/4000/5000

4000/5000

4000/5000

3150/4000/5000

3

Rated short-time withstand current and duration

DS & ES

kA/s

40/4@2000A,50/3@3150A,63/3@4000A,5000A

4

Rated peak withstand current

kA

100,125,160


5

Rated power frequency withstand voltage, 1min

Across the open contact

kV

202

303(339)

315

375

606(726)

720/610(922)

720/610(922)

1058(1055)

To earth

160

230(260)

275

325

460(552)

510/520(653)

510/520(653)

740

Rated lightning impulse withstand voltage

(1.2/50 s)

Across the open contact

kV

439

653(735)

750

860

1256(1500)

1380/1665(1882)

1380/1665(1882)

1990(2125)

To earth

380

550(622)

650

750

1050(1260)

1175/1425(1504)

1175/1425(1504)

1675

Rated switching impulse withstand voltage

Across the open contact

kV

/

/

/

/

/

1145/1350(1466)

1145/1350(1466)

1625

To earth

/

/

/

/

/

950/1175(1140)

950/1175(1140)

1300


Note: The value shown in the bracket is the Max. offered value of our product.