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Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

a line of the mercury spectrum corresponding to a wavelength of about 365 nm.
International Atomic Energy Agency, an organization which monitors nuclear materials and energy.
DC current in amperes.
ideal transformer
a transformer with zero winding resistance and a lossless, infinite permeability core resulting in a transformer efficiency of 100 percent. Infinite permeability would result in zero exciting current and no leakage flux. For an ideal transformer, the ratio of the voltages on the primary and secondary sides would be exactly the same as the ratio of turns in the windings, while the ratio of currents would be the inverse of the turns ratio.
See International Electro-technical Commission
See Institute of Electrical and Electronics Engineers
IEEE Color Books
a series of seven books related to industrial and commercial power systems containing recommended
IEEE/ANSI standards and practices. The books are color-coded as to subject as follows:

Gray: Power systems in commercial buildings

Green: Grounding industrial and commercial power systems

Brown: Power system analysis

Gold: Design of reliable industrial and commercial power systems

Orange: Emergency and standby power for industrial and commercial power systems

Red: Electric distribution practice in industrial plants

Buff: Protection and coordination of industrial and commercial power systems.
a high-voltage mercury switch. The device is found in modulators used to dump the capacitor bank voltage in the event of a PA crowbar. An ignitron passes electrical current to a pool of liquid mercury at ground potential.
(1) in vision science, the amount of light per unit area delivered to a surface and accounting for the spectral sensitivity of the human eye.

(2) informally, the amount of light falling on an object. Also called illuminance. See also luminance.

(3) the effect of a visible radiation flux received on a given surface. Illumination is measured by the illuminance, which is the luminous flux received by surface unit, usually expressed in lux. One lux equals 1 lumen/m2.
illumination system
the light source and optical system designed to illuminate the mask for the purpose of forming an image on the wafer.
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