WL/r

12÷24kV
WL-r series withdrawable vacuum circuit breakers are suitable for metal-clad type SYSclad switchboards. They are realized using the separate pole technique. Each pole has a vacuum interrupter inside which, thanks to a special production process, is built in the resin directly during the cylinder moulding stage. This construction technique ensure protection of the vacuum interrupter against impact, dust and condensation. The operating mechanism is stored energy type and free unlock system, with opening and closing operations independent from the operator. The circuit breaker is fitted on a trolley with racking mechanism which permit at the VCB to assume inside the panel the “inserted, sectioned, extracted”. Mechanical interlocks guarantee maximum safety of the operator.

Main electrical characteristics
Rated voltage kV 12 17,5 24
Rated power-frequency withstand voltage 50Hz 1min kV (r.m.s.) 28 38 50
Rated lightning impulse withstand voltage kV (peak) 75 95 125
Rated frequency Hz 50-60
Rated current A 630
1250
1600
2000
2500
3150
630
1250
1600
2000
2500
Breaking capacity KA 25
31,5
40
25
31,5
Rated short-circuit current kA 25 - 3s
31,5 - 3s
40 - 3s
25 - 3s
31.5 - 3s
Peak value kA 62,5
80
100
62,5
80