CK Contactors for Power Factor Correction Capacitor Switching
(minimum electrical endurance > 100,000 operations of power capacitor switching)
CK Contactors for Capacitor Switching have been developed over many years of practical experience. The table below shows the contactor ratings at 50 Hz 55°C max ambient temperature in the capacitive current range 250 - 1250A. BPC keep in stock for immediate delivery the CK75CA311W and CK75CA311N. The last letter in the order code denotes coil voltage. All CK contactors in stock have 1 x N/C + N/O aux contact which you can see on the side in the above picture. Additional aux contacts can be fitted if required. Fixing bolts nuts and washers for the three phase connections are supplied with each contactor. Unlike the CSC range, these contactors do not have early make inrush resistors. Special heavy duty alloy contacts are fitted to accommodate capacitor inrush currents.