UPS5000-A-400 kVA
User Manual (50 kVA, PF=0.9)
3 Installation
Issue 03 (2020-01-10)
Copyright © Huawei Technologies Co., Ltd.
94
No.
Item
Acceptance Criteria
configurations
02
Cable layout
Cables are routed properly and meet
engineering requirements.
03
Secure cable connections
Input and output power cables and battery
cables are securely connected, and spring
washers have been flattened to prevent
them from falling off and causing
accidents. There is no risk of
disconnection.
04
Marks for tightened screws
Tightened screws are marked.
05
Serial port connection (security
protection mechanism supported)
Signal cables are connected properly and
securely.
06
Cable labels
Both ends of each cable are labeled. Labels
are easy to understand.
07
Ground cable connections
The ground cable is securely connected to
the equipment room ground bar. Use a
multimeter to measure the resistance
between the UPS ground cable and the
equipment room ground bar. The resistance
must be less than 0.1 ohm.
08
Distances between cable ties
Distances between cable ties are the same
(recommended distance is 30 cm), and no
burr exists.
09
Correct cable connections
Cables are properly connected according to
wiring diagrams.
10
Live wire and neutral wire
connections
Input and output live wires and neutral
wires are correctly connected. Mains input
terminals 1L1, 1L2, 1L3, and N, bypass
input terminals 2L1, 2L2, 2L3, and N, and
output terminals U, V, W, and N are
properly connected.
11
Input and output live wire phase
sequences
In single UPS mode, mains and bypass
input and output live wires are connected in
a correct sequence. In a parallel system,
mains and bypass input and output live
wires are connected in the same sequence
for each UPS.
12
Battery cable connections
Use a multimeter to check that the sum of
the absolute voltage of the negative battery
string and the voltage of the positive
battery string is greater than a certain value
(2 x Number of cells), and that the
difference between the absolute voltage of
the negative battery string and the voltage
of the positive battery string is less than the