ltem

Unit

Techincal parameter

Rated voltage

kV

12

insulator

nitrogen/dry air

Rated frequency

Hz

50/60

Rated current

A

630

Rated current

1.1Ir

Rated power frequency 1-minute withstand voltage
(Relatively speaking)

kV

42

Peak rated lightning impulse withstand voltage
(1.2/50ms)(Relatively speaking)

kV

75

Rated short-time withstand current and duration

kA/s

20/4

Rated peak withstand current

kA

50

Duration of arc ignition

s

1

Mechanical lifespan

M2

Electrical lifespan

E2