Motors

Motors

Industry: Electrical equipment

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Motors

Starting current

Electrical equipment; Motors

Amount of current drawn at the instant a motor is energised - in most cases much higher than that required for running. Same as locked rotor current.

Starting torque

Electrical equipment; Motors

The torque or twisting force delivered by a motor at the instant it is energized. Starting torque is often higher than rated running or full load torque.

That part of an AC induction motor's magnetic structure which does not rotate. It usually contains the primary winding. The stator is made up of laminations with a large hole in the centre in which ...

Stress cones

Electrical equipment; Motors

A physical protection placed over the external connexions point on medium and high voltage motor leads. Stress cones are used to avoid di-electric breakdown of motor leads in the vicinity of the ...

Suffixes to nema frames

Electrical equipment; Motors

Letter suffixes sometimes follow the NEMA frame size. Some of these suffixes, according to NEMA standards, have the following meanings

Surge protection

Electrical equipment; Motors

A capacitor device usually mounted in the conduit box to flatten the voltage surges that may occur as a result of lighting or a power supply surge (short-period peak). These surges could result in ...

Synchronous motor

Electrical equipment; Motors

A motor which operates at a constant speed up to full load. The rotor speed is equal to the speed of the rotating magnetic field of the stator; there is no slip. There are two (2) major types ...