Glossary  of Terms

AC Voltage – Commercially generated mains voltage

 

AC Current – Bi-directional flow of electrical energy due to a voltage potential

 

Automatic Bypass – Supplies critical load directly from mains in case of fault conditions

 

Battery – DC voltage storage medium

 

Battery Autonomy – Length of time UPS can run during mains failure

 

DC Voltage – Battery voltage

 

DC Current – Uni-directional flow of electrical energy due to a voltage potential

 

Hard-wired UPS – Recommended to be installed by suitably qualified engineer, cable connectors for input and output

 

Input – AC supply into UPS (mains or standby generator)

 

Inverter – Converts the DC voltage into an AC voltage

 

Load – Any device which draws current from a power system

 

Maintenance Bypass – Manually operated switch which allows electrical isolation of the UPS while continuing to supply critical load

 

Plug and Play UPS – UPS can be installed by customer plug on input, socket for output

 

Power Factor – Term expressing the ratio of watts to VA

 

Rectifier – Converts AC voltage into DC voltage to supply power to the inverter and to charge the battery

 

Synchronise – Bring together in phase

 

UPS – Uninterruptible power supply

 

VA Rating – Is the voltage x amps rating

 

Watts – Is the voltage x amps x power factor of the load

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