Backup time - Time during which the UPS can supply the rated load with nominal-quality power while the mains are down. This time depends on the battery and the efficiency of the UPS. Typical backup ranges from five minutes to several hours.
Tolerance in % - Limit for allowable variations for a given quantity, expressed as a percent of the rated value.
Ambient Humidity - The average humidity of the surroundings.
Output (rated) - Apparent power Pn that the UPS can deliver under given load conditions (power factor = 0.8).
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.
Short-Circuit Current (SCC) - The initial value of the current obtained from a battery in a circuit of negligible resistance.
Current Drain - The current withdrawn from a battery during discharge.
