RMS Voltage - The range of usable voltage + or - 170 VAC.
Crest factor (Fc) - Ratio between the peak current value to the rms current value.
MTBF (Mean Time Between Failures) - Mathematical calculation of the duration of normal operation of a repairable device between failures. The product, expressed in hours, is an indication on the reliability of the device.
Coulomb - The amount of electricity transported by a current of one ampere flowing for one second.
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.
Gravimetric Energy Density - The ratio of the energy output of a cell or battery to its weight (Wh/kg). This term is used interchangeably with specific energy.
Drain - The current withdrawn from a battery during discharge.
