standby power source


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standby power source

[′stand¦bī ′pau̇·ər ‚sȯrs]
(electricity)
An uninterruptible power system in which the load normally operated from the commercial power line is switched to the output of a dc-to-ac static inverter powered by a battery in the event of a power failure.
References in periodicals archive ?
All of the air handlers and associated smoke control equipment are energized from a standby power source.
The upgrade also replaced low and medium switchgears, transformers, an emergency generator, and associated life-safety and standby power sources to the tenants.
The system integrates with emergency power sources and tenant standby power sources.