Electrical Engineering Terms O

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Ohmmeter.

An electrical test instrument used for lower-value (as compared to high-resistance) electrical resistance measurements.

Ohmic Resistance.

In defining this resistance: A DC circuit is said to have a resistance of one ohm when one volt will produce a current of one ampere through it.

Overcurrent protection

A device used to protect the panel components and process in the event that something causes the motor to draw more current than it was designed.

Open Drip Proof (ODP).

Normally abbreviated to the acronym ODP, this type of motor enclosure is probably the most common used. The end bells of the cylindrical motor housing have openings to permit ventilation through the motor windings.

Ohm’s Law

it states that current is proportional to voltage and inversely proportional to the resistance.

 

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