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