UPS5000-A-400 kVA
User Manual (50 kVA, PF=0.9)
4 Installation Verification
Issue 03 (2020-01-10)
Copyright © Huawei Technologies Co., Ltd.
115
Figure 4-26
Output Param. screen
Output volt. adjustment (V)
The output voltage can be slightly adjusted based on onsite power distribution to ensure
minimum difference between the output voltage and the bypass voltage. This ensures
seamless transfer from normal mode to bypass mode. The value range is ±5%.
Outp. Transf. interrupt time (Hz/s)
−
The value can be 0.1–2.0 Hz/s, 0.6 Hz/s by default.
−
The value can be adjusted depending on the actual situation. If the value is small,
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 the value is large, 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%, 80% by default.
Output interruption transfer time (ms)
The default value is 0 ms. The transfer from inverter mode to bypass mode takes 1–2 ms,
and the transfer from bypass mode to inverter mode takes 0–20 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
1–10, 5 by default.
Bypass Param.
Bypass Param.
screen.
