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  2. Transfer switch - Wikipedia

    en.wikipedia.org/wiki/Transfer_switch

    Some transfer switches are manual, in that an operator effects the transfer by throwing a switch, while others are automatic and trigger when they sense one of the sources has lost or gained power. An Automatic Transfer Switch (ATS) is often installed where a backup generator is located, so that the generator may provide temporary electrical ...

  3. Synchronization (alternating current) - Wikipedia

    en.wikipedia.org/wiki/Synchronization...

    In an alternating current (AC) electric power system, synchronization is the process of matching the frequency, phase and voltage of a generator or other source to an electrical grid in order to transfer power. If two unconnected segments of a grid are to be connected to each other, they cannot safely exchange AC power until they are synchronized.

  4. Automotive air conditioning - Wikipedia

    en.wikipedia.org/wiki/Automotive_air_conditioning

    A temperature switch or a thermistor can control the evaporator coil surface temperature, and a pressure switch or sensing element can monitor the suction pressure (which is in relationship with the refrigerant's evaporating temperature). Both control means can act (either directly or by means of a control unit fed by their data) upon the ...

  5. Switchgear - Wikipedia

    en.wikipedia.org/wiki/Switchgear

    Load-break/Load-make switches can switch normal system load currents; Isolators are off load disconnectors which are to be operated after Circuit Breakers, or else if the load current is very small; By voltage class: Low voltage (less than 1 kV AC) Medium voltage (1 kV AC through to approximately 75 kV AC) High voltage (75 kV to about 230 kV AC)

  6. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    After the control of air flow and temperature was standardized, the use of electromechanical relays in ladder logic to switch dampers became standardized. Eventually, the relays became electronic switches, as transistors eventually could handle greater current loads. By 1985, pneumatic controls could no longer compete with this new technology ...

  7. Voltage regulator - Wikipedia

    en.wikipedia.org/wiki/Voltage_regulator

    Inrush current or input surge current or switch-on surge is the maximum, instantaneous input current drawn by an electrical device when first turned on. Inrush current usually lasts for half a second, or a few milliseconds, but it is often very high, which makes it dangerous because it can degrade and burn components gradually (over months or ...

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