Glossary - MGE UPS Systems 3.5 to 21 kVA N+1 Owner's Manual

Symbols Definition/Meaning
@ At.
/ And/or.
+/- Plus or Minus.
≤ Equal to or less than.
# Number.
°C Degree Celsius.
°F Degree Fahrenheit.
Ø Phase angle.
Ω Ohm; unit of resistance.
® Trade Mark.
2nd Second.
ABC Normal sequence of phase (clockwise) in three-phase power.
AC or ac Alternating current, also implies root-mean-square (rms).
Ambient Temp. Temperature of surrounding air.
Ambient noise Acoustical noise of surrounding environment.
ANSI American National Standard Institute.
AWG American Wire Gauge.
Automatic bypass Automatic switch controlled by the UPS, used to connect the equipment directly to
the AC-power source.
Automatic start When AC input power returns following shutdown at the end of the
following return of battery backup time, UPS automatic start can be enabled or disabled.
AC input power
Backup time Time that the connected equipment can operate on battery power.
Bar graph Device on the front panel indicating the percent remaining backup time or the
percent load.
Battery circuit DC-power circuit breaker that protects the battery circuit.
breaker
Battery test Internal UPS test on battery status.
Breaker Electrical circuit interrupter.
BTU or Btu British thermal unit. Defined as the amount of heat required to raise the tempera-
ture of one pound of water by 1°F.

Glossary

Owner's Manual
G l o s s a r y
page g — 1