Installation and user manual – MGE UPS Systems EX 7RT User Manual
Page 51
Installation and User Manual
3.4
Operation on battery power
Figure 3-6: Transfer, Threshold and End of backup time.
Operation
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3.4.1
Transfer to Battery Power
The load continues to be protected by the UPS when
the Normal AC source is not available. Power is
supplied by the battery.
There are three possible cases:
First Case:
LED is ON.
LED is ON.
The audio alarm beeps every 10 seconds.
◗
This indicate the load is supplied by the battery.
◗
The display indicates the battery remaining
backup time.
Second Case:
LED is ON.
LED is ON.
The audio alarm beeps every 3 seconds.
◗
Low battery warning on display. There is very little
remaining battery backup time. Close all appli-
cations because UPS automatic shutdown is
pending.
Third Case:
LED is OFF.
LED is OFF.
The audio alarm is stopped.
◗
The load is transferred to the Bypass AC source if
available. In this case:
LED is ON.
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OFF
ON
OFF
ON
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SHUTDOWN DUE
TO DEPLETED BATTERY
REMAINING TIME
10 minutes
OFF
ON
REMAINING TIME
2 minutes
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