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Electric power quality is the degree to which the voltage, frequency, and waveform of a power supply system conform to established specifications. Good power quality can be defined as a steady supply voltage that stays within the prescribed range, steady AC frequency close to the rated value, and smooth voltage curve waveform (which resembles a sine wave).
A form of energy transfer between two physically close tuned circuits. return loss A measure of the power loss due to a signal reflection by a discontinuity in a transmission line or an optical fiber. RF connector An electrical fitting used to connect cables carrying radio frequency currents. RF engineering
A distribution board (also known as panelboard, circuit breaker panel, breaker panel, electric panel, fuse box or DB box) is a component of an electricity supply system that divides an electrical power feed into subsidiary circuits while providing a protective fuse or circuit breaker for each circuit in a common enclosure.
A Allocation of costs is the transfer of costs from one cost item to one or more other cost items. Allowance - a value in an estimate to cover the cost of known but not yet fully defined work. As-sold estimate - the estimate which matches the agreed items and price for the project scope. B Basis of estimate (BOE) - a document which describes the scope basis, pricing basis, methods ...
A residual-current device (RCD), residual-current circuit breaker (RCCB) or ground fault circuit interrupter (GFCI) [a] is an electrical safety device, more specifically a form of Earth-leakage circuit breaker, that interrupts an electrical circuit when the current passing through line and neutral conductors of a circuit is not equal (the term residual relating to the imbalance), therefore ...
A stamped circuit board (SCB) is used to mechanically support and electrically connect electronic components using conductive pathways, tracks or traces etched from copper sheets laminated onto a non-conductive substrate.
The electrical arrangement of valve arms and other components essential for the function of the main power circuit of a converter. converter section of a double converter That part of a double converter in which the main direct current when viewed from the DC terminals always flows in the same direction. controllable valve device
An offline unit provides electrical isolation between the primary power source and the critical technical load whereas an online unit does not. A Class A power source is a primary power source, i.e., a source that assures an essentially continuous supply of power.