MGE UPS Systems 3.5 to 21 kVA N+1 User 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.