Huawei UPS5000-A-500 kVA User Manual page 105

UPS5000-A-500 kVA
User Manual (e-shelter)
Battery Parameters
Battery parameter settings impact battery maintenance, battery lifespan, and UPS discharge
time. When you set battery parameters, note the following:
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Issue 02 (2020-01-10)
Item
Minimum bypass voltage
ECO voltage range
BPM mode upon BPM
overtemp.
Battery string sharing is unavailable when Single/Parallel is set as 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 may damage the
batteries. An incorrect estimated discharge time may cause 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.
Single batt. float chg. voltage deviation alarm thres. and Single batt. dis. voltage
deviation alarm thres. 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, these two parameters do not need
to be set.
Copyright © Huawei Technologies Co., Ltd.
Description
 When the voltage level is 415 V, the value range is 10%
(default) and 15%.
When the difference between the bypass voltage and the
rated voltage exceeds the lower threshold for the bypass
voltage, the system determines that the bypass voltage is
abnormal and that the bypass is unavailable. The value can
be –10%, –15%, –20%, –30%, –40%, –50%, or –60%. The
default value is –20%.
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%, ± 6%,
± 7%, ± 8%, ± 9%, or ± 10%. The default value is ± 5%.
This parameter specifies whether to start bypass mode if
overtemperature occurs.
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