COS phi - A measure of the phase shift between the current wave and the voltage wave observed at the terminals of a load supplied with AC power at a given frequency.
Voltage (float) - DC voltage applied to the battery to maintain its charge level. This voltage depends on the type of battery, the number of cells and the manufacturer's recommendations.
Continuous Test - A test in which a battery is discharged to a prescribed end point voltage without interruption.
Power Surge - Voltage above 110% of rated RMS voltage for one or more cycles.
Constant Current Discharge - A battery discharge regime whereby the current drawn during the discharge remains constant.
Redundancy (standby) - UPS configuration in which one or several UPS units operate on stand-by, with no load or only a partial load, and can immediately back up a faulty UPS unit by no-break transfer of the load, carried out by a static switch.
Discharge Rate - The rate, usually expressed in amperes, at which electrical current is taken from the battery.
