Huawei UPS5000-E Series User Manual page 133

UPS5000-E-(50 kVA-125 kVA)
User Manual (Integrated UPS 3.0)
Output Parameter Settings
Figure 4-42 Output Parameter screen
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Issue 09 (2019-12-20)
Output volt. adjustment (V)
The output voltage can be slightly 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 400 V, 240.0 when 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%, 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 to 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
to 10, 5 by default.
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4 User Interface
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