Capacity Check - AEG Protect 5.31 Series Operating Instructions Manual

5.6.1

Capacity Check

i
Protect 5.31/xxx-480-220-120 10 kVA - 120 kVA
Test of the battery charging circuit:
This brief test checks the connected battery by lowering the voltage
and carrying out a current analysis. Line interruptions or defective
fuses in the battery circuit are also detected. With a battery present,
the test takes approx. 1 second. It is carried out automatically each
week by the rectifier control uni
This operating mode allows a check of the battery status by drawing
constant current from the battery. In this process, the regulator
lowers the DC voltage until the desired discharge current flows from
the battery. The inverter load must be larger than the discharge
current.
The following characteristic curve values can be preselected
using the DOU:
•
Discharge current
•
Discharge time
•
Final discharge voltage
The test can be started under the following conditions:
•
Operating mode: charging or trickle charging
•
Battery voltage > 2.2 V/cell (for lead-acid cells)
•
Rectifier current < 90% of I
•
Rectifier current > Battery discharge current setpoint + 5%
•
At least 1 min must have elapsed since the last test
Values displayed on the DOU:
Before the test:
•
Date and time of the last test
During the test:
•
Battery voltage, battery current, test duration, capacity drawn from
the battery
After the test:
•
Battery voltage, battery current, test duration, capacity drawn from
the battery at end of test
The capacity check is finished when the final discharge voltage or the
max. discharge time is reached. It is interrupted if the inverter load
becomes too low. The test can also be interrupted manually using the
DOU. After the test, the system automatically switches back to battery
charging.
ATTENTION:
As the battery is partly or completely discharged, the full standby
time of the UPS is not available in the event of a mains failure.
NOTE:
In the event of a battery fault, the system must be switched over
to the SBS (capacity check / capacity test).
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