Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

primary
(1) the source-side winding.

(2) refers to the portion of a nuclear power plant containing the reactor and its equipment. primary coolant the medium used to remove energy, in the form of heat, from a nuclear reactor core, e.g., water, helium, or liquid metal.
primary voltage
in power distribution the voltage at the primary winding of the distribution transformer.
primary winding
the transformer winding connected to the energy source.
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