420kV GIS
Product Characteristics
ZF-420 is composed of circuit breaker, disconnector, earthing switch, current transformer, voltage transformer, lightning arrester, bus, incoming and outgoing line bushing or cable sealing end enclosed in an earthed metal enclosure, and filled with SF6 in certain pressure as the insulating medium.
Product Parameters

Rated voltage (kV)

420

Rated current (A)

5000

Rated short-circuit breaking current (kA)

50/63

Rated short-time withstand current/time (kA/s)

50/3,63/3

Rated peak withstand current (kA)

171

Rated power frequency withstand voltage (kV)

To earth

650

Across breakers

650+165

Rated lightning impulse withstand voltage (kV)

To earth

1425

Across breakers

1425+240

Rated switching impulse withstand voltage (kV)

To earth

1050

Across breakers

900+345