Motors

Motors

Industry: Electrical equipment

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Motors

Constant H.P.

Electrical equipment; Motors

A designation for variable or adjustable speed motors used for loads requiring the same amount of H.P. regardless of their motor speed during normal operation.

Design A, B, C, D - for AC motors

Electrical equipment; Motors

NEMA has standard NEMA motor designs of various torque characteristics to meet the various requirements posed by different application loads. The design "B" is the most common design.

I2R

Electrical equipment; Motors

Losses due to current flowing in a conductor caused by resistance (equals the current squared times the resistance.

J seconds (DC motors)

Electrical equipment; Motors

J is the per unit moment of inertia. It is defined as the time in seconds to accelerate the motor armature to rated base speed using rated full load torque.

Navy service A

Electrical equipment; Motors

Motors designed to meet requirements of MIL M-17059 or MlL M-17060 for high shock and service and are essential to the combat effectiveness of a ship. These motors are usually made of nodular iron.

N.E.C. temperature code (T code)

Electrical equipment; Motors

An index for describing maximum allowable "skin" (surface) temperature of a motor under any normal or abnormal operating conditions. The "T" codes are applicable to U.L. Iisted explosion-proof ...