It provides connection between electrical circuits that are not under tension and earth. It is air-insulated. The open to closed positions can be monitored owing to the observation window on the cubicle door.
Rated voltage
36kV
17.5kV
12kV
7.2kV
Lightning impulse voltage
170kV
95kV
75kV
60kV
Power frequency impulse voltage
70kV
38kV
28kV
20kV
Rated frequency
50Hz
Rated current
630A-1250A
Rated short-circuit current
16-20kA
Rated short-circuit closing current
2.5 x rated short-circuit current
The number of off on rated short-circuit current
At least 5 times
Mechanical withstand
Idle 1000 on-off
