UPS5000-E-(50 kVA-300 kVA)
User Manual (50 kVA Power Modules)
4 User Interface
Issue 02 (2017-02-25)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
154
Item
Description
transfer
times
mode, which impacts the system. This parameter specifies the number of
transfers between bypass mode and normal mode within 1 hour, which
ensures system security. The value can be 1 to 10, and is 5 by default.
Bypass Parameter Settings
Figure 4-42
Bypass Param. Settings
Item
Description
Bypass
frequency
range (Hz)
When the difference between the bypass input frequency and the rated
frequency is greater than this value, the system determines that the bypass
frequency is not normal, and that the bypass is unavailable.
The frequency range must be greater than the ECO frequency range. The
value range is ±0.5 Hz to ±6 Hz, ±2 Hz by default.
Maximum
bypass
voltage
When the difference between the bypass voltage and the rated voltage
exceeds the upper threshold for the bypass voltage, the system determines
that the bypass voltage is not normal and that the bypass is unavailable.
NOTE
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
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%.
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%,
