MGE UPS Systems 3.5 to 21 kVA N+1 - Manual (Page 49)

GND Ground (safety).
Hz Hertz, frequency measurement unit, 1Hz is one cycle per second.
Inverter mode See “on-line” mode.
I Current.
IEC International Electrotechnical Commission.
IEEE Institute of Electrical and Electronic Engineers.
Input branch circuit The input circuit from the building power panel to the equipment.
Inverter An electrical circuit that generates an AC voltage source from a DC voltage source.
IGBT Insulated gate bipolar transistors
kVA KiloVolt-Ampere; is equal to 1000 Volt-Ampere.
kVAR KiloVolt-Amperes reactive.
kW KiloWatt; a measure of real power, equal to 1000 watts.
L Line.
LCD Liquid-Crystal Display unit.
LED Light Emitting Diode.
Load Connected to the UPS output, such as computer systems or critical devices.
Low battery shutdown The battery has reached the lowest permitted operating voltage, and the inverter has
shutdown (disconnecting the load) to protect the battery from damage due to further
discharge.
Mains or Mains 1 Main AC input source.
Mains 2 Bypass AC input source.
mA Milliampere.
MAX. Maximum.
MCM Thousand circular mil; standard wire sizes for multiple stranded conductors over 4/0
AWG in diameter. M is from Roman numerical system indicating 1000.
M-M Multi-Module.
Module Refers to individual power inverter module.
N Neutral.
NC Normally close.
NEC National Electrical Code.
NFPA National Fire Protection Association.
Glossary page g — 3
Owner’s Manual