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Inrush current. Inrush current, input surge current, or switch-on surge is the maximal instantaneous input current drawn by an electrical device when first turned on. Alternating-current electric motors and transformers may draw several times their normal full-load current when first energized, for a few cycles of the input waveform.
TV pickup is a phenomenon occurs in the United Kingdom that involves sudden surges in demand on the national electrical grid, occurring when a large number of people simultaneously watch the same television programme. TV pickup occurs when viewers take advantage of commercial breaks in programming to operate electrical appliances at the same ...
IEC 61000-4-5 is an international standard by the International Electrotechnical Commission on surge immunity. In an electrical installation, disruptive surges can appear on power and data lines. Their sources include abrupt load switching and faults in the power system, as well as induced lightning transients from an indirect lightning strike ...
A tower type UPS with one IEC 60320 C14 input and three C13 outlets. A large data-center-scale UPS being installed by electricians. An uninterruptible power supply ( UPS) or uninterruptible power source is a type of continual power system that provides automated backup electric power to a load when the input power source or mains power fails.
July 11, 2024 at 6:12 PM. HOUSTON (AP) — About half a million Houston-area homes and businesses will still be without electricity next week, the city's largest utility said Thursday, stoking the ...
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Owners at the Surfside condos in Daytona Beach, where a two-bedroom unit is currently listed for $415,000, have paid between $50,000 and $60,000 in assessments to have their building’s concrete ...
Compressor surge is a form of aerodynamic instability in axial compressors or centrifugal compressors. The term describes violent air flow oscillating in the axial direction of a compressor, which indicates the axial component of fluid velocity varies periodically and may even become negative. In early literature, the phenomenon of compressor ...
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