Vacuum Circuit Breakers

Circuit breakers, normally applied at medium voltages, that use vacuum interrupters to extinguish the electrical arc and shut-off flowing current.

VA

1) Electrical capacity or electrical load, expressed as Volts x Amps. 2) Volt Ampere rating designates the output which a transformer can deliver at rated voltage and frequency without exceeding a specified temperature rise.

USMA

Utility Supply Management Alliance, a utility industry conference held annually that is focused on the supplier/customer relationship.