Electricity

Electricity

A database referring to the existence of a flow of electric charge.

Industry: Utilities

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Electricity

harmonic

Electrical equipment; Electricity

A sinusoidal component of the voltage that is a multiple of the fundamental wave frequency. Harmonics are primarily the result of the today's modern electronic equipment. Today's electronics are ...

harmonic distortion

Electrical equipment; Electricity

The presence of harmonics that change an AC waveform from sinusoidal to complex.

hazard risk category

Electrical equipment; Electricity

Categories defined by NFPA 70E-2004 to explain protection levels needed when performing tasks. The values range from 1 to 4. ATPV rated PPE is required for categories 1 through 4 as follows: 1- 4 ...

heat run test

Electrical equipment; Electricity

A test that is used to determine the increase in operating temperature at a given load.

helical

Electrical equipment; Electricity

Wrapped in a spiral fashion. Refers to the way the strands of a conductor are laid.

The meter-kilogram-second unit of inductance, equal to the inductance of a circuit in which an electromotive force of one volt is produced by a current in the circuit which varies at the rate of one ...