1200A 7.2kV Vacuum Circuit Breaker, 33kA, Spring Mech
The ABB VHKX ABB-7.5VHKX500-1200A is a premium medium voltage vacuum circuit breaker engineered for reliable power distribution in industrial, commercial, and utility applications. This vacuum replacement breaker is rated for 7.2 kV nominal voltage class with a continuous current capacity of 1200A and an interrupting rating of 500 MVA (33 kA symmetrical short-circuit current). The unit features a Basic Impulse Level (BIL) rating of 95 kV, ensuring robust insulation coordination against transient overvoltages. The stored energy spring operating mechanism provides dependable closing and opening operations with proven reliability across thousands of duty cycles. Utilizing vacuum interrupter technology, this breaker delivers clean, maintenance-friendly arc interruption with extended contact life compared to traditional air-magnetic designs. This unit is designed as a direct replacement for ITE/ABB HK/HKV 7.5HK-500 breakers, enabling modernization of existing switchgear installations without costly cell modifications. Available in drawout configuration, the breaker integrates seamlessly into standard metal-clad switchgear assemblies. Fully compliant with ANSI C37.06, IEEE C37.09, this circuit breaker meets or exceeds all applicable safety and performance requirements. Ideal applications include direct replacement of ite/abb hk and hkv air-magnetic and early vacuum circuit breakers in existing hk-type metal-clad switchgear, nuclear and commercial grade applications. The ABB-7.5VHKX500-1200A offers operators peace of mind through its proven track record of reliable performance, extensive parts availability, and full compliance with current industry safety standards for medium voltage circuit protection.
