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A switch that operates at very low temperatures at which its components are superconducting; when current is sent through a control element to produce a magnetic field, a gate element changes from a superconductive zero-resistance state to its normal resistive state.

Related Terms

SEEBECK EFFECT

When two different adjacent metals are heated, an electric current is generated between the metals.

ADJUSTABLE DIFFERENTIAL

A means of changing the difference between the control cut-in and cut-out points.

ACTION

Refers to the action of a controller. It defines what is done to regulate the final control element to effect control.

SHED MODE

A method of demand control that reduces kW demand through shedding and restoring loads.

AMMETER

An instrument for measuring the magnitude of electric current flow.

ARC

A flash, caused by an electric current ionizing a gas or vapor.

ARMATURE DEMAGNETIZATION

The reduction in the effective magnetic lines of force, produced by the armature current.

ALIVE

A term referring to a circuit in which a current is flowing. Also referred to as live.

ALTERNATOR

A device which converts mechanical energy, into alternating current.

AIR GAP

The space between magnetic poles, or between the rotating and stationary assemblies in a motor or generator.
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