ABB Vmax Vacuum Circuit Breaker

Feature & Principle

It adopts molded monobloc vacuum interrupter structure and modular spring operating mechanism. It extinguishes arc in vacuum environment, with fast dielectric recovery after current zero crossing. Available in fixed and withdrawable versions, mechanical interlock ensures operation safety. It cooperates with protection relay to complete overload, short-circuit fault breaking for medium voltage distribution circuits.

Specifications

Model: Vmax Brand: ABB Rated voltage: 12 kV / 17.5 kV Rated current: 630A,1250A,1600A,2000A Short-circuit breaking current: 25 kA, 31.5 kA Operation mechanism: Spring charged mechanism Structure: Fixed / Withdrawable Standard: IEC 62271-100, GB1984 Mechanical life: 10000 operations Application: UniGear switchgear, industrial substation, building power distribution Certification: CE

Components & Diagnostics

Vacuum interrupter, insulated monoblock, spring operating mechanism, auxiliary switch, closing coil, opening coil, position indicator. Common faults: spring charging failure, cannot close/open, vacuum interrupter leakage, auxiliary contact failure, coil burnout.

Product Brief

Vmax medium voltage vacuum circuit breaker, ABB compact MV breaker spare widely used for industrial substation, commercial building and secondary distribution cabinet maintenance and replacement.