ZJW3-816 HV DC Earthing Switch
Product Characteristics
ZJW3-816 HV DC earthing switch is characterized by single arm and vertically folded insertion structure, which is used for outdoor. It is mainly used in the power supply system with rated voltage ±816kV, for HV lines to reliably ground HV electrical equipment such as HV bus, circuit breaker, instrument transformer, disconnector, etc. in the event of power failure to protect important equipment and the personal safety of maintenance personnel.
Product Parameters


No.

Name

Unit

Value

1

Rated voltage

kV

±816

2

Rated short-time withstand current

kA

50

Rated peak withstand current

kA

170

Rated duration of short-circuit

s

3

3

Rated DC withstand voltage, 60min

kV

1360

4

Rated lightning impulse withstand voltage (1.2/50μs, peak value)

kV

2205

5

Rated switching impulse withstand voltage (250/2500μs, peak value)

kV

1755