Huawei UPS5000-E User Manual page 161

UPS5000-E-(50 kVA-300 kVA)
User Manual (50 kVA Power Modules)
Input Parameter Settings
Figure 4-40 Input Param. screen
Item
D.G. mode
D.G. power
limiting (kVA)
and D.G.
charger power
ratio (%)
Intra-rack
power module
start delay (s)
and Inter-rack
power module
start delay (s)
Input
adaptability
Issue 02 (2017-02-25)
Retaining default input parameter settings is advised.
Description
Set this parameter when a D.G. connects to the input PDC. Select
Enable when a D.G. is detected over dry contacts.
Set these two parameters to control the valid input current and limiting
input current, which prevents load impact and facilitates better
cooperation between the UPS and the D.G. The value range of D.G.
power limiting (kVA) is 0–5000 kVA. The default value is 250 kVA
for the 200 kVA UPS, and the default value is 400 kVA for the 300
kVA UPS. The value range of D.G. charger power ratio (%) is
0%–100%, and the default value is 0%.
These two parameters enable the UPS to control the interval that each
rack (or module) transfers from battery mode to normal mode, which
reduces the impact on the generator or power grid. In the case of battery
undervoltage, the system automatically shortens the delay for
transferring to normal mode to 1/8 of the normal delay to accelerate the
transfer and prevent battery overdischarge. Intra-rack power module
start delay (s) can be set to a value ranging from 0.5 to 120. The preset
value of Intra-rack power module start delay (s) depends on the
preset number of power modules. The preset value is 2.0, 1.0, and 0.5
for 1–5, 6–10, and 10–20 power modules respectively. Inter-rack
power module start delay (s) can be set to a value ranging from 2 to
120. The preset value of Inter-rack power module start delay (s) is
5.0. The start delay of a module in a rack varies depending on the rack
number and module number. #1 module in rack 1 does not have a start
delay.
The value of Input adaptability can be Strong 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
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