Huawei UPS5000-E Series - Page 192

UPS5000-E-(50 kVA-300 kVA)
User Manual (50 kVA Power Modules)
4 User Interface
Issue 11 (2019-12-20)
Copyright © Huawei Technologies Co., Ltd.
182

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.

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.
Table 4-16 Battery settings
Item
Description
Default Value
Value Range
Float volt.
temp. comp.
If this parameter is set to Enable,
the float voltage is calibrated
based on the battery temperature
when a battery temperature
sensor is connected. The
parameter is configurable in any
mode.
Enable
Disable, Enable
Float volt.
temp. comp.
coef.
(mV/(°C·cell))
Calibration coefficient during
float voltage temperature
compensation.
3.3
0.0–6.0
Float Chg
temp. comp.
center (°C)
Indicates the reference
temperature during temperature
compensation of the float
charging voltage.
25
20–30
Automatic
equalized
charging
If this parameter is set to Enable,
the UPS automatically changes
the battery management status to
equalized charge based on the
charge current and float charge
time.
Enable
Disable, Enable
Transfer-to-eq
ualized
charging cur.
coef. (C10)
The battery enters equalized
charge state when the battery
current exceeds this parameter
value.
0.05
0.02–0.08
SOC to start
equalized
charging (%)
If the SOC is lower than the
specified value, batteries start
equalized charging.
70
0–100
Scheduled
equalized
charging
interval (d)
After batteries transfer from
equalized charging to float
charging, if the batteries do not
discharge, equalized charging
starts only after the float charging
time reaches Equalized
60
30–180
Equalized
7
0–15