Motors

Motors

Industry: Electrical equipment

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Motors

direct current (D.C.)

Electrical equipment; Motors

A current that flows only in one direction in an electric circuit. It may be continuous or discontinuous and it may be constant or varying.

dc motor

Electrical equipment; Motors

A motor using either generated or rectified D.C. power (see Motor definition) . A DC motor is usually used when variable speed operation is required.

A definite purpose motor is any motor design, listed and offered in standard ratings with standard operating characteristics with special mechanical features for use under service conditions other ...

dimensions

Electrical equipment; Motors

NEMA has standard frame sizes and dimensions designating the height of the shaft, the distance between mounting bolt holes and various other measurements. The integral AC motor NEMA sizes run from ...

drip-proof guarded

Electrical equipment; Motors

A drip-proof machine with ventilating openings guarded (with screens) as in a guarded motor.

drip-proof motor

Electrical equipment; Motors

An open motor in which the ventilating openings are so constructed that drops of liquid or solid particles falling on it, at any angle not greater than 15 degrees from the vertical, cannot enter ...