19 Terms
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Electricity
A database referring to the existence of a flow of electric charge.
Industry: Utilities
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Electricity
Luminaire
Electrical equipment; Electricity
A complete lighting unit consisting of a light source with a means of distribution (reflector and/or refractor), lamp positioning (socket), lamp protection (housing) and a provision for power ...
Luminaire dirt depreciation (LDD)
Electrical equipment; Electricity
The accumulation of dirt on luminaires results in a loss of light output on the road. This loss is known as the LDD factor and is determined by estimating the dirt category from the graph below. From ...
Luminaire dirt depreciation factor (LDD)
Electrical equipment; Electricity
The multiplier used in luminance calculations to relate the initial luminance provided by clean, new luminaries to the reduced luminance that they will provide due to dirt collection on the ...
Luminance
Electrical equipment; Electricity
In a direction and at a point of a real or imaginary surface
Lux
Electrical equipment; Electricity
The SI unit of luminance. One lux is one lumen per square meter.
Media access control (MAC) address
Electrical equipment; Electricity
Media Access Control address is a unique numeric identifier assigned to each device connected to an Ethernet network. It is used for data transmission and security functions.
Main protection
Electrical equipment; Electricity
The protection system which is normally expected to operate in response to a fault in the protected zone.
