Electricity

Electricity

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

Industry: Utilities

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Electricity

Zero crossing

Electrical equipment; Electricity

The point at which a sinusoidal voltage or current waveform crosses the zero reference axis.

Light

Electrical equipment; Electricity

Energy that is capable of exciting the retina and producing a visual sensation.

Light loss factor (LLF)

Electrical equipment; Electricity

A factor used in calculating luminance after a given period of time and under given conditions. It takes into account temperature and voltage variations, dirt accumulation on luminaire and lit ...

A device that protects power lines and equipment against high voltage lighting surges and switching surges. Connected from line to ground potential, the device has a very high resistance to current ...

Lighting maintenance factor (MF)

Electrical equipment; Electricity

The result of time-dependent depreciation effects must be considered in the initial design. Regular maintenance is particularly important with regard to energy conservation and these plans, once ...

Lightning

Electrical equipment; Electricity

Lightning is a powerful natural electrostatic discharge produced during a thunderstorm. Lightning's abrupt electric discharge is accompanied by the emission of light.

Lightning & switching impulses

Electrical equipment; Electricity

A distinction is made between Lightning and Switching impulses on the basis of duration of the wave front. Impulses with wave-front durations of up to a few tens of microseconds are in general ...