IEC 62040-3:2021 pdf download – Uninterruptible power systems (UPS) – Part 3: Method of specifying the performance and test requirements.
3.2.20 secondary battery battery that is rechargeable by way of a reversible chemical reaction 3.2.21 charger converter that provides DC power to an energy storage device for the purpose of increasing or maintaining the amount of stored energy 3.2.22 flywheel energy storage system mechanical energy storage device wherein stored kinetic energy can be converted to electrical energy during stored energy mode 3.2.23 UPS switch controllable switch used to interconnect or isolate power ports of UPS units, bypass or load for continuity of load power Note 1 to entry: Annex C details UPS switch applications. 3.2.24 transfer switch UPS switch used to convey power from one of two or more sources 3.2.25 electronic power switch UPS switch comprising at least one controllable electronic valve device Note 1 to entry: A static bypass switch is an example of an electronic power switch. [SOURCE: IEC 60050-551 :1 998, 551 -1 3-01 , modified – Words “an operative unit for electronic power switching” replaced by “UPS switch” and Note 1 to entry added.] 3.2.26 mechanical power switch UPS switch with physical separation between contacts
3.5.21 unbalance ratio difference between the highest and the lowest RMS values of the fundamental components in a polyphase circuit, referred to the average between all phases of the RMS values of the fundamental components of the currents or voltages respectively [SOURCE: IEC 601 46-2:1 999, 3.5.1 5, modified – Words “three-phase a.c. system” replaced by “polyphase circuit” and “three phases” replaced by “all phases”.] 3.5.22 periodic output voltage modulation periodic variation of the RMS output voltage amplitude at frequencies less than the fundamental output frequency 3.5.23 rated input current <UPS> RMS current at the AC input port of the UPS while operating in normal mode, at rated input voltage, rated load and charging a fully depleted energy storage device 3.5.24 maximum input current <UPS> RMS current at the AC input port of the UPS while operating in normal mode, at worst- case input voltage, rated load and charging a fully depleted energy storage device 3.5.25 inrush current maximum peak value and time duration of the input current when the UPS transitions from stored energy mode to normal mode with no load connected 3.5.26 output current RMS value of the current at the AC output port of the UPS Note 1 to entry: The output current is an RMS value unless otherwise specified for a particular test. 3.5.27 current limit <control> function that prevents a current from exceeding its specified value
3.5.53 stored energy time minimum time during which the UPS, under specified operational conditions, will ensure continuity of load power, during an AC input power failure 3.5.54 restored energy time maximum time required to, under normal mode of operation and with the charging capacity installed, recharge the energy storage device of the UPS so that the stored energy time can again be achieved 3.5.55 cut-off voltage voltage at which the energy storage device, during stored energy mode, under specified operational conditions, is considered to be fully depleted 3.5.56 ambient temperature temperature of the air or other medium where the equipment is to be used [SOURCE: IEC 60050-826:2004, 826-1 0-03, modified – Words “average temperature” replaced by “temperature”, words “in the vicinity of the equipment” replaced by “where the equipment is to be used”, and Note to entry deleted.] 3.5.57 efficiency <UPS> ratio of output active power to input active power or the ratio of output energy to input energy under specified test conditions Note 1 to entry: Test conditions for UPS efficiency are found in Annex J.