Combined Electrical Apparatus GIS/HGIS

Rated Voltage kV

Rated Current A

Rated Frequency Hz

SF₆ Gas Leakage Rate %/year

Rated Short-circuit Breaking Current kA

Rated Lightning Impulse Withstand Voltage (Peak) kV

Rated Short-time Power Frequency Withstand Voltage (RMS) kV

Rated Switching Impulse Withstand Voltage (RMS) kV

Structure

Complete Bay

Busbar Maximum

Phase to Ground

Across Contacts

Phase to Ground

Across Contacts

To Ground

Across Contacts

72.5

2500/3150

3150

50/60

≤0.1

40/50

350

350+35

160

160+16

/

/

Three-phase separate tank / common tank

126

2000/3150

4000

50

≤0.1

40

550

550+100

230

230+70

/

/

Three-phase common tank

145

3150/4000

4000

50/60

≤0.1

40

650

650+100

275

275+40

/

/

Three-phase common tank

170

4000

4000

50

≤0.1

40/50

750

750+110

325

325+50

/

/

Three-phase common tank

252

3150/4000/5000

5000

50/60

≤0.1

50/63

1050

1050+206

460

460+146

/

/

Main busbar / disconnector three-phase common tank or separate tank; others three-phase separate tank

363

4000/5000

6000

50/60

≤0.1

50/63

1175

1175+205

520

520+210

950

950+295

Main busbar three-phase common tank or separate tank; others three-phase separate tank

420

4000

5000

50

≤0.1

50

1425

1425+240

650

570+245

1050

900+345

Three-phase separate tank

550

4000/5000/6300/8000

8000

50/60

≤0.1

63/80

1675

1675+450

740

740+318

1300

1175+450

Three-phase separate tank

800

5000/6300

6300

50

≤0.1

50/63

2100

2100+460

960

960+460

1550

1300+650

Three-phase separate tank

1100

6300(CB/DS)、9000(BSG)、8000(others)

9000

50

≤0.1

63

2400

2400+900

1800

1675+900

1100

1100+635

Three-phase separate tank