Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

ambient temperature
the temperature of the air or liquid surrounding any electrical part or device. Usually refers to the effect of such temperature in aiding or retarding removal of heat by radiation and convection from the part or device in question.
color temperature
the color a black object becomes when it is heated. The standard color "white" occurs when a tungsten filament is heated to a temperature of 6800 degrees Kelvin. The temperature of 6800 K corresponds to a standard white raster as defined by the NTSC. The color temperature for white is useful for comparing color matching and color decoding among different displays that use different color phosphors. The standard "white" is obtained by mixing the 30% red, 59% green, and 11% blue color signals. Differences in the color saturation for the different phosphors found in television CRTs will modify the required proportions of red, green, and blue to produce the standard "white."
electromagnetic pulse (EMP)
a large impulsive-type electromagnetic wave generated by nuclear or chemical explosions.
EMP

See electromagnetic pulse
temperature coefficient of resistance
the change in electrical resistance of a resistor per unit change in temperature.
temporary fault
a fault that will not reoccur if the equipment is deenergized and then reenergized. An example of a temporary fault is when a lightning stroke causes an uninsulated overhead line to arc over an insulator, with no equipment damage.
temporary interruption
a loss of voltage of less than 0.1 pu for a duration of 3 seconds to 1 minute.
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