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Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

brushless rotary flux compressor
a rotating machine designed to deliver pulsed output (1 MJ in 100 µs). The stator coils are excited by an external capacitor bank. The rotor is a salient structure that compresses the flux resulting in amplification of the electric pulse, by converting the rotating kinetic energy of the rotor to electrical energy.

bulb generator
a free-standing generator contained in a streamlined, waterproof bulb-shaped enclosure and driven by a waterwheel resembling a ship’s propeller on a shaft which extends from one end of the enclosure. They are used in tidal power installations.
bulk power
a term inclusive of the generation and transmission portions of the power system.

bulk substation
a substation located on a high-voltage transmission line which supplies bulk power to a non-generating utility.

bundle
the practice of paralleling several conductors per phase in an overhead transmission line for the purpose of increasing ampacity and decreasing inductive reactance.

bundle spacer
a rigid structure which is used to maintain the spacing of wires in a bundled conductor on an overhead electric power transmission line.

See bundle
bundled services
utility services which are sold together, like power transmission and distribution services in non-deregulated electric utilities.

burndown
breakage of an overhead electric power line due to heating from excess current.

burnup
a measure (e.g., megawattt-days / ton) of the amount of energy extracted from each unit of fissile material invested in a nuclear reactor.

bus
(1) a data path connecting the different subsystems or modules within a computer system. A computer system will usually have more than one bus; each bus will be customized to fit the data transfer needs between the modules that it connects.
(2) a conducting system or supply point, usually of large capacity. May be composed of one or more conductors, which may be wires, cables, or metal bars (busbars).
(3) a node in a power system problem
(4) a heavy conductor, typically used with generating and substation equipment.