Design
Depending on the intended purpose and type of fitting apparatus, cubicles can be with or without the withdrawable unit. Availability or non-availability of the front doors depends on main switchgear connections: KU10C cubicles for rated currents of 1600 A up to 3 150 A have up-and-over doors of original design and cubicles for rated currents of 2000 А and 3150 А (breaking current of 31.5 kA) have a short front door and a curtain dropped down when the withdrawable unit is moved. Some cubicles are manufactured without front doors; a withdrawable unit front panel is used instead of them. Cubicles series KU10C are available both in front access design and rear and front access design.
Switching Apparatus
Switchgears series KU-10C are equipped with BP1, BP2 and BP3 vacuum switch-breakers made by High-Voltage Union. These circuit-breakers are designed for rated currents of up to 3150 A and rated breaking currents of up to 40 kA. They have the commutation life of up to 50000 ON/OFF cycles at rated currents and 100 cycles at breaking currents.
10 kV Vacuum Circuit-Breakers
