This RB-series pole-mounted automatic throw in and out high voltage shunt-wound capacitor can be used in the 12 KV and 7. 2kv wiring circuit to enhance the power factor, release the line wastage and improve the voltage quality. Rated voltage: 12 kV Rated current: 630 A Rated short-time withstand current (4s) : 12, 5, 16, 20 kA Electrical life: 1000 Times Rated short-circuit making current (peak) : 31. 5 / 40 / 50 kA Rated peak withstand current: 31. 5 / 40 / 50 kA Rated short-time withstand current / duration: 12. 5, 16, 20 / 4 kA / s 1 min P. F. Withstand voltage: 50 kV Rated breaking capacitor current: 200 / 400A Mechanism lifetime: 10000 Times Net weight: 145 KG