Primary Battery - A battery which is not intended to be recharged and is discarded when the battery has delivered all of its electrical energy.
IEC (International Electrotechnical Commission) - Advisory organization that draws up international standards in the electrotechnical field.
Absorption - The taking up or retention of one material by another by chemical or molecular action.
Power Surge - Voltage above 110% of rated RMS voltage for one or more cycles.
Reactance (subtransient Uscx %, for generator) - Relative measurement (%) of the internal impedance of an AC generator during harmonic phenomena. This reactance, also called the longitudinal subtransient reactance of the generator, is sometimes identified as X"d. For most common generators, the value ranges between 15 and 20%. It can drop to 12% for optimized systems and to 6% for special devices.
Internal Resistance (IR) - The opposition exhibited by a circuit element to the flow of direct current (d.c.). In a cell, the internal resistance is the sum of the ionic and electronic resistances of the cell components.
Power source (alternate) - Backup source used in the event of a mains failure. The connection time and the duration of the source depend on the type of source used. (back)