Ampere interrupting capacity. See AIR or
ampere interrupting rating.
Adjustable Speed Drive (Electrical)
The adjustable speed drive is comprised of the
motor, drive controller and operator’s controls
(either manual or automatic).
motor, drive controller and operator’s controls
(either manual or automatic).
Adjustable Speed
The concept of varying the speed of a motor,
either manually or automatically. The desired
operating speed (set speed) is relatively
constant regardless of load.
either manually or automatically. The desired
operating speed (set speed) is relatively
constant regardless of load.
AA (med. voltage transformers)
Abbreviation for Air-To-Air. Self-cooled by
convection and conduction as it applies to a drytype
transformer, i.e. the heat transfer path.
convection and conduction as it applies to a drytype
transformer, i.e. the heat transfer path.
480Y/277 Volt Wye System:
The most common system in large commercial
and industrial applications. By using this (3
phase 4 wire) system: 277 volts, for lighting
loads, is available between any phase and
neutral; and 480 volts, for motors and heating
loads, is available phase to phase.
and industrial applications. By using this (3
phase 4 wire) system: 277 volts, for lighting
loads, is available between any phase and
neutral; and 480 volts, for motors and heating
loads, is available phase to phase.
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