Apparent Power (volt-amps)

The product of the applied voltage and current in an ac circuit. Apparent power, or volt-amps, is not the true power of the circuit because the power factor is not considered in the calculation.

Anti-Pumping Device

A feature incorporated in a Circuit Breaker or re-closing scheme to prevent repeated operation where the closing impulse lasts longer than the sum of the relay and CB operating times.

Antenna Gain

An antenna’s transmission power, provided as a ratio of its output (send) signal strength to its input (receive) signal strength, normally expressed in dBi. The higher the dBi, the stronger the antenna.

ANSI

American National Standards Institute. ANSI is located at 1430 Broadway, New York, NY 10018.