electrical
Switchgear system USN
USN cubicles are used in indoor switchgears and distribution centres for 10–24 kV electrical power distribution at 50/60 Hz, providing protection of attached lines against overloads and short circuits.
Key features
- Cubicles equipped with vacuum circuit breakers of various manufacturers
- Three high-voltage compartments with draw-out circuit breakers
- Type tested according to IEC 62271-200
- Designed for high-power regional substation switchgears
- Make-type earthing switch
- One-side maintenance
- Operation of all switching devices with front door closed
- Complete air insulation of all switchboard live parts
- IP41 degree of protection on the external housing
- Constructed to withstand overpressures caused by internal arc up to 50 kA / 1 s
- Mechanical outside door interlock ensures safe maintenance