Huawei UPS5000-E-400 kVA User Manual page 128

UPS5000-E-(360 kVA-480 kVA)
User Manual (40 kVA Power Modules)
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Output Param.
Figure 4-36 Output Param. screen
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Issue 07 (2020-01-10)
Set these two parameters to control the valid input current and limiting input current,
preventing load impact and facilitating cooperation between the UPS and the D.G. The
D.G. power limiting (kVA) setting range is 0–5000 kVA. The default value is 600 kVA
for the UPS5000-E-480 kVA. The D.G. charger power ratio (%) value range is 0%–
100%, and the default value is 0%.
Intra-rack power unit start delay (s) and Inter-rack power unit start delay (s)
Control the time interval for each rack (or unit) to transfer from battery mode to normal
mode, which reduces the impact on the D.G. or power grid. In the case of battery
undervoltage, the system automatically shortens the transfer delay to 1/8 of the normal
delay to accelerate the transfer and prevent battery overdischarge. The value can be 2–
120 seconds, 5 seconds by default. The delay depends on the rack number and unit
number. Unit 1 in rack 1 has no start delay.
Input adaptability
The value of Input adaptability can be Strong (default) or Weak. Strong input
adaptability applies to the D.G. or input sources whose input current has high frequency
oscillation. In this mode, the total distortion of the input current waveform (THDi) is
poor, but the system is stable. Weak input adaptability is suitable for mains and AC input
sources.
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. The 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 setting range is 0.1 Hz/s to 2.0 Hz/s. 0.6 Hz/s is set 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.
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