Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

isolation
(1) the separation of a part from other parts of the system so that the effects of undesired changes in the system are not seen by the separated part.

(2) a figure (usually expressed in decibels) to describe how well a transmitting device (source) and receiving device (receiver) are separated electrically; the amount of (usually undesirable) signal appearing at the receiver from the transmitting source from an undesirable signal path such as leakage in a coupler, mutual coupling, or multipath.
isolation switch
See bypass switch
isolation transformer
a transformer, typically with a turns ratio of 1:1, designed to provide galvanic isolation between the input and the output.
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