Continuous Test - A test in which a battery is discharged to a prescribed end point voltage without interruption.
Energy Density - The ratio of the energy available from a battery to its volume (Wh/L) or weight (Wh/kg).
Hourly Rate (also see C-Rate) - A discharge rate, in amperes, of a battery which will deliver the specified hours of service to a given cutoff voltage.
UPS (parallel without redundancy) - A UPS made up of several (n) parallel-connected UPS units with equal output ratings (P) and each equipped with its battery, for large loads. The total output is equal to the number of units multiplied by their individual output (n x P). In this configuration, no UPS unit is redundant.
Alloy - A mixture of several other metals or a metal and a non-metal.
Distortion (individual) - Ratio between the rms value of an nth order harmonic and the rms value of the fundamental.
Earthing system TT - Earthing system in which the neutral and the exposed conductive parts are directly earthed. The installation must be de-energized immediately in the event of an insulation fault.