Letter D

DC Drive
An electronic device used to control the speed of a DC motor.
The term variable speed drive applies to both DC Drives and AC
Drives.

DC Motor
A motor that converts direct current electrical energy into
mechanical energy.

Dead Front
A front portion of a panelboard or switchboard that limits
exposure to electrical connections.


Delta
A connection arrangement used for the primary and/or
secondary of a three-phase transformer.


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