Huawei UPS5000-E-12 User Manual page 131

UPS5000-E-(40 kVA-320 kVA)
User Manual
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Battery Parameter Settings
Battery parameter settings have great impact on battery maintenance, battery lifespan, and
UPS discharge time. When you set battery parameters, note the following:
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Set battery parameters, as shown in
Issue 10 (2015-09-15)
Maximum bypass voltage
Upper threshold for the bypass voltage. When the difference between the bypass voltage
and the rated voltage exceeds this value, the system determines that the bypass voltage is
abnormal and that the bypass is unavailable.
 When the voltage level is 380 V, the value range is +10%, +15% (default), +20%, and +25%.
 When the voltage level is 400 V, the value range is +10%, +15% (default), and +20%.
 When the voltage level is 415 V, the value range is +10% (default) and +15%.
Minimum bypass voltage
Lower threshold for the bypass voltage. When the difference between the bypass voltage
and the rated voltage exceeds this value, the system determines that the bypass voltage is
abnormal and that the bypass is unavailable. The value can be –10%, –20% (default),
–30%, –40%, –50%, or –60%.
ECO voltage range
In ECO mode, when the difference between the bypass voltage and the rated voltage is
greater than this value, the system determines that the ECO voltage is abnormal and
transfers to normal mode. The values can be ± 5% (default), ± 6%, ± 7%, ± 8%, ± 9%, or
± 10%.
BPM mode upon BPM overtemp.
This parameter specifies whether to start bypass mode if overtemperature occurs.
Battery string sharing is unavailable when Single/Parallel is Single.
Battery string sharing affects the actual charge current and the estimated discharge time.
An incorrect setting will cause a high or low charge current, which tends to damage
batteries. An incorrect estimated discharge time may lead to a data backup fault.
Retain default settings for Chg. cur. limiting coef. and Cell float voltage. Only
professional maintenance personnel are allowed to change the settings.
When you set parameters, ensure the following: Chg. cur. limiting coef. >
Transfer-to-equalized charging cur. Coef; Dis. cur. 0.1C EOD > Dis. cur. 0.3C EOD >
Dis. cur. 0.5C EOD > Dis. cur. 1.0C EOD.
Battery type must meet the actual situation. Currently, only VRLA batt. is supported.
Chg. volt. over range point and Dis. volt. over range point are used to check whether
the batteries in each battery string have the same charge voltage and discharge voltage.
When a value exceeds the specified range, an alarm is generated. The calculation formula
is (Charge/Discharge voltage – Average voltage)/Average voltage x 100%. The
charge/discharge voltage and average voltage are obtained from the BMU. If the BMU is
not configured, you do not need to set these two parameters.
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Figure 4-38 to Figure 4-42.
4 User Interface
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