OJWN IEC Indoor Grounding Switch
OJWN earthing switch is meant for short circuiting and earthing grids that have been disconnected from the power supply; rated voltage 12-24 kV, current up to 100 kA.
Earthing switches with fault making capacity can be reliably closed against short-circuit currents, thus protecting the operator and switchgear in the cause of inadvertent operation.
There are two forms of earthing switch:
- Independent earthing switches
- Earthing switches with combined current transformers
Features and benefits
- The current transformers of the combined version form the mounting base for the earthing switch contacts thus reducing the space required in the cubicle
- Every earthing switch is fitted with a spring operating device which makes the closing capacity independent of the operating speed
- The control side of the earthing switch and direction of current can usually be chosen without limitations except for a few models with combined current transformers