UPS5000-E-(25 kVA-125 kVA)-FM
User Manual
4 User Interface
Issue 06 (2019-12-13)
Copyright © Huawei Technologies Co., Ltd.
131
Figure 4-39
Output Param. screen
Output volt. adjustment (V)
The output voltage can be adjusted based on the onsite power distribution condition to
ensure a minimum difference between the output voltage and the bypass voltage. This
facilitates uninterruptible transfer from normal mode to bypass mode. The voltage
adjustment range is ±5%. The default value is 220.0 when the voltage is 380 V, 230.0
when the voltage is 400 V, and 240.0 when the voltage is 415 V.
Output freq. track rate (Hz/s)
−
The value range is 0.1–2.0 Hz/s, and the default value is 0.6 Hz/s.
−
This parameter can be adjusted based on site requirements. If
Output freq. track
rate (Hz/s)
is slow, the inverter frequency is different from the bypass frequency
when the bypass frequency changes. If output is overloaded or the inverter is faulty,
an interruption (less than 20 ms) occurs when the UPS transfers from normal mode
to bypass mode. If
Output freq. track rate (Hz/s)
is fast, the inverter frequency is
unstable.
Self-load output cur. ratio (%)
Set the percentage of the output current to the rated output current when the UPS is in
self-load mode. The value can be 20%–100%, and is 80% by default.
Output interruption transfer time (ms)
The interruption for the UPS to transfer from normal mode to bypass mode is 1–2 ms,
and from bypass mode to normal mode is 0–20 ms. Set this parameter based on the
output interruption time acceptable to loads. The default value is 0 ms.
Max. BPM transfer times
Cross currents occur during the transfer between bypass mode and normal 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
Set bypass parameters, such as the bypass voltage and frequency range, as shown in
