UPS5000-A-500 kVA
User Manual (e-shelter)
4 User Interface
Issue 02 (2020-01-10)
Copyright © Huawei Technologies Co., Ltd.
94
Input Parameters
Figure 4-22
Input parameters
Retaining default input parameter settings is advised.
Item
Description
D.G. mode
Set this parameter to
Enable
when a D.G. connects to the input PDC.
The UPS enters the D.G. mode when a D.G. is detected over dry
contacts. The default value is
Disable
.
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 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%.
Intra-rack
power unit
start delay (s)
and
Inter-rack
power unit
start delay (s)
The two parameters enable the UPS to control the interval that each
rack (or unit) 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 unit start
delay (s)
can be set to a value ranging from 0.5 to 120. The default
value depends on the default number of power units. The default value
is
2.0
,
1.0
, and
0.5
for 1–5, 6–10, and 10–20 power units respectively.
Inter-rack power unit start delay (s)
can be set to a value ranging
from 2 to 120. The default value is
5.0
. The start delay of a unit in a
rack varies depending on the rack number and unit number. 1# unit in
rack 1 does not have a start delay.
Input
adaptability
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
adaptability is suitable for mains and AC input sources. The default