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2. Emergency power system - Wikipedia

   en.wikipedia.org/wiki/Emergency_power_system

   An emergency power system is an independent source of electrical power that supports important electrical systems on loss of normal power supply. A standby power system may include a standby generator, batteries and other apparatus. Emergency power systems are installed to protect life and property from the consequences of loss of primary ...

3. 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]

4. Diesel generator - Wikipedia

   en.wikipedia.org/wiki/Diesel_generator

   A 200 kW Caterpillar diesel generator set in a sound attenuated enclosure used as an emergency backup at a sewage treatment substation in Atlanta, United States. A diesel generator (DG) (also known as a diesel GenSet) is the combination of a diesel engine with an electric generator (often an alternator) to generate electrical energy. [1]

5. Uninterruptible power supply - Wikipedia

   en.wikipedia.org/wiki/Uninterruptible_power_supply

   A UPS differs from a traditional auxiliary/emergency power system or standby generator in that it will provide near-instantaneous protection from input power interruptions by switching to energy stored in battery packs, supercapacitors or flywheels. The on-battery run-times of most UPSs are relatively short (only a few minutes) but sufficient ...

6. Transfer switch - Wikipedia

   en.wikipedia.org/wiki/Transfer_switch

   It prevents backfeeding from an emergency generator back into the utility line, for example. [1] One example is an open transition automatic transfer switch (ATS). During the split second of the power transfer the flow of electricity is interrupted.

7. Black start - Wikipedia

   en.wikipedia.org/wiki/Black_start

   smaller gas turbine generators can be started on battery power. NBS generators ("non-black-start") that require external energy (cranking power) to start. A typical example is a steam turbine unit, micro-hydro generator units usually rely on the grid for the frequency control and reactive power management and cannot be used as BS generators as ...