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2. Standby generator - Wikipedia

   en.wikipedia.org/wiki/Standby_generator

   Standby generators. 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]

3. Transfer switch - Wikipedia

   en.wikipedia.org/wiki/Transfer_switch

   Homes with standby generators may use a transfer switch for a few circuits or the whole home. Different models are available, with both manual and automatic transfer. Often small transfer switch systems use circuit breakers with an external operating linkage as the switching mechanism. The linkage operates two circuit breakers in tandem ...

4. Emergency power system - Wikipedia

   en.wikipedia.org/wiki/Emergency_power_system

   A backup generator for a large apartment building A backup power fuel cell for telecom applications A portable emergency power generator in a shipping container. An emergency power system is an independent source of electrical power that supports important electrical systems on loss of normal power supply.

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6. Uninterruptible power supply - Wikipedia

   en.wikipedia.org/wiki/Uninterruptible_power_supply

   Newer rotary units use technologies such as magnetic bearings and air-evacuated enclosures to increase standby efficiency and reduce maintenance to very low levels. Typically, the high-mass flywheel is used in conjunction with a motor-generator system. These units can be configured as: A motor driving a mechanically connected generator, [7]

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