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  2. Emergency power system - Wikipedia

    en.wikipedia.org/wiki/Emergency_power_system

    Emergency power systems are installed to protect life and property from the consequences of loss of primary electric power supply. It is a type of continual power system . They find uses in a wide variety of settings from homes to hospitals , scientific laboratories, data centers , [ 1 ] telecommunication [ 2 ] equipment and ships.

  3. Transfer switch - Wikipedia

    en.wikipedia.org/wiki/Transfer_switch

    A closed transition transfer switch (CTTS) is also called a make-before-break transfer switch. A typical emergency system uses open transition, so there is an inherent momentary interruption of power to the load when it is transferred from one available source to another (keeping in mind that the transfer may be occurring for reasons other than ...

  4. Blue light station - Wikipedia

    en.wikipedia.org/wiki/Blue_Light_Station

    Blue Light Stations provide a direct communication path to the rail system's operations control center and a switch to disconnect traction power from the power rail(s) or overhead catenary in case of emergency. This emergency trip system (ETS) immediately shuts down the traction power supply in the adjacent track section, to protect people ...

  5. Standby generator - Wikipedia

    en.wikipedia.org/wiki/Standby_generator

    A standby generator is a back-up electrical system that operates automatically. [1] Within seconds of a utility outage an automatic transfer switch senses the power loss, commands the generator to start and then transfers the electrical load to the generator. The standby generator begins supplying power to the circuits. [2]

  6. Ram air turbine - Wikipedia

    en.wikipedia.org/wiki/Ram_air_turbine

    Modern aircraft generally use RATs only in an emergency. [2] In case of the loss of both primary and auxiliary power sources the RAT will power vital systems (flight controls, linked hydraulics and also flight-critical instrumentation). [3] Some RATs produce only hydraulic power, which is in turn used to power electrical generators.

  7. Electric power system - Wikipedia

    en.wikipedia.org/wiki/Electric_power_system

    An electric power system is a network of electrical components deployed to supply, transfer, and use electric power. An example of a power system is the electrical grid that provides power to homes and industries within an extended area.

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    mail.aol.com/d?reason=invalid_cred

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Power transfer unit - Wikipedia

    en.wikipedia.org/wiki/Power_transfer_unit

    In aviation, a power transfer unit (PTU) is a device that transfers hydraulic power from one of an aircraft's hydraulic systems to another in the event that the other system has failed or been turned off. The PTU is used when, for example, there is right hydraulic system pressure but no left hydraulic system pressure.