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  2. Surge protector - Wikipedia

    en.wikipedia.org/wiki/Surge_protector

    Surge Protection Device (SPD) for installation in a low-voltage distribution board. A surge protector (or spike suppressor, surge suppressor, surge diverter, [1] surge protection device (SPD), transient voltage suppressor (TVS) or transient voltage surge suppressor (TVSS)) is an appliance or device intended to protect electrical devices in alternating current (AC) circuits from voltage spikes ...

  3. IEC 61000-4-5 - Wikipedia

    en.wikipedia.org/wiki/IEC_61000-4-5

    [2] [5] The "8/20 μs" generator is designed for surge arrester testing, and produces a high-current surge into a low-impedance load. [2] On the other hand, modern electronic devices can be high and low-impedance loads simultaneously due to non-linear devices, protection circuits, and arcing in a dielectric breakdown.

  4. BS 7671 - Wikipedia

    en.wikipedia.org/wiki/BS_7671

    Amendment 1 replaced Periodic inspection reports (PIRs) with Electrical Installation Condition Reports (EICRs), a section on surge protection devices (SPDs) was introduced, and some details relating to medical locations were added. [10] Amendment 2 added a new section on electric vehicle charging. [11]

  5. Power system protection - Wikipedia

    en.wikipedia.org/wiki/Power_system_protection

    Power system protection is a branch of electrical power engineering that deals with the protection of electrical power systems from faults [citation needed] through the disconnection of faulted parts from the rest of the electrical network. The objective of a protection scheme is to keep the power system stable by isolating only the components ...

  6. Varistor - Wikipedia

    en.wikipedia.org/wiki/Varistor

    Metal-oxide varistor manufactured by Siemens & Halske AG. Modern varistor schematic symbol, which is the same as a thermistor symbol [1]. A varistor (a.k.a. voltage-dependent resistor (VDR)) is a surge protecting electronic component with an electrical resistance that varies with the applied voltage. [2]

  7. Inrush current - Wikipedia

    en.wikipedia.org/wiki/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.

  8. List of IEC standards - Wikipedia

    en.wikipedia.org/wiki/List_of_IEC_standards

    IEC TR 62066 Surge overvoltages and surge protection in low-voltage a.c. power systems – General basic information IEC 62067 Power cables with extruded insulation and their accessories for rated voltages above 150 kV ( U m = 170 kV) up to 500 kV ( U m = 550 kV) – Test methods and requirements

  9. Selectivity (circuit breakers) - Wikipedia

    en.wikipedia.org/wiki/Selectivity_(circuit_breakers)

    Selectivity, also known as circuit breaker discrimination, is the coordination of overcurrent protection devices so that a fault in the installation is cleared by the protection device located immediately upstream of the fault. The purpose of selectivity is to minimize the impact of a failure on the network.

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