UPS5000-E-(25 kVA-75 kVA)-BF
User Manual
4 User Interface
Issue 07 (2019-12-13)
Copyright © Huawei Technologies Co., Ltd.
122
Figure 4-34
Input Parameter Settings
Retaining default input parameter settings is advised.
D.G. mode
Enable or disable D.G. mode. Set this parameter when a D.G connects to the input PDC.
Select
Enable
when a D.G. is detected over dry contacts.
D.G. power limiting (kVA)
and
D.G. charger power ratio (%)
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
100 kVA. The value range of
D.G. charger power ratio (%)
is 0%–100%, and the
default value is 0%.
Intra-rack power module start delay (s)
and
Inter-rack power module start delay (s)
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.
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 Param. screen
Set output parameters, as shown in