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  2. Current limiting - Wikipedia

    en.wikipedia.org/wiki/Current_limiting

    An inrush current limiter is a device or devices combination used to limit inrush current. Passive resistive components such as resistors (with power dissipation drawback), or negative temperature coefficient (NTC) thermistors are simple options while the positive one (PTC) is used to limit max current afterward as the circuit has been operating (with cool-down time drawback on both).

  3. Inrush current limiter - Wikipedia

    en.wikipedia.org/wiki/Inrush_current_limiter

    Negative temperature coefficient (NTC) thermistors and fixed resistors are often used to limit inrush current. NTC thermistors can be used as inrush-current limiting devices in power supply circuits when added in series with the circuit being protected. They present a higher resistance initially, which prevents large currents from flowing at ...

  4. 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.

  5. Current limiting reactor - Wikipedia

    en.wikipedia.org/wiki/Current_limiting_reactor

    Current limiting reactor. The main motive of using current limiting reactors is to reduce short-circuit currents so that circuit breakers with lower short circuit breaking capacity can be used. They can also be used to protect other system components from high current levels and to limit the inrush current when starting a large motor. [5]

  6. Motor soft starter - Wikipedia

    en.wikipedia.org/wiki/Motor_soft_starter

    Another way to limit motor starting current is a series reactor. If an air core is used for the series reactor then a very efficient and reliable soft starter can be designed which is suitable for all types of 3 phase induction motor [ synchronous / asynchronous ] ranging from 25 kW 415 V to 30 MW 11 kV.

  7. Pre-charge - Wikipedia

    en.wikipedia.org/wiki/Pre-charge

    If the example circuit from before is used with a pre-charge circuit which limits the dV/dT to less than 600 volts per second, then the inrush current will be reduced from 670 amperes to 7 amperes. This is a "kinder and gentler" way to activate a high voltage DC power distribution system.

  8. Choke (electronics) - Wikipedia

    en.wikipedia.org/wiki/Choke_(electronics)

    In electronics, a choke is an inductor used to block higher-frequency alternating currents (AC) while passing direct current (DC) and lower-frequency ACs in a circuit. A choke usually consists of a coil of insulated wire often wound on a magnetic core , although some consist of a doughnut-shaped ferrite bead strung on a wire.

  9. Temperature coefficient - Wikipedia

    en.wikipedia.org/wiki/Temperature_coefficient

    The lower the coefficient, the greater a decrease in electrical resistance for a given temperature increase. NTC materials are used to create inrush current limiters (because they present higher initial resistance until the current limiter reaches quiescent temperature), temperature sensors and thermistors.