3.1.3 Power Cables
NO TICE
● A circuit breaker needs to be installed in the upstream of the UPS to facilitate
maintenance.
● When the UPS is used in an IT power distribution system, a four-pole
disconnector must be used for a three-phase system, or a two-pole
disconnector must be used for a single-phase system.
● The UPS can generate large leakage currents. A circuit breaker equipped with a
residual current device (RCD) is not recommended. If leakage protection is
required, select a recommended circuit breaker.
● The leakage current of the 6 kVA UPS is less than or equal to 100 mA. The
leakage current of the 10 kVA UPS is less than or equal to 200 mA. The leakage
current of the 15 kVA/20 kVA UPS is less than or equal to 500 mA.
● When selecting a residual current circuit breaker, consider the leakage current
of the UPS and downstream loads.
● It is recommended that the length of battery cables and output cables be less
than or equal to 10 m.
● You can install linked circuit breakers for both the N wire and L wire. No
independent circuit breaker is allowed for only the N wire.
● For the 15 kVA/20 kVA model, use AC ground cables that have a cross-sectional
area of 25 mm
2
and M6 OT terminals that are 90° bent and have a cross-
sectional area of 25 mm
2
.
● For the 15 kVA/20 kVA model, use battery ground cables that have a cross-
sectional area of 16 mm
2
and M6 OT terminals that are 90° bent and have a
cross-sectional area of 16 mm
2
.
● For the 6 kVA model, use ground cables that have a cross-sectional area of 6
mm
2
and M4 OT terminals and have a cross-sectional area of 6 mm
2
.
● For the 10 kVA model, use ground cables that have a cross-sectional area of 10
mm
2
and M6 OT terminals and have a cross-sectional area of 10 mm
2
.
lists the recommended power cable specifications.
Table 3-2 Recommended power cable specifications
Model
Wiring
Terminal
Number
of
Phases
Rated
Voltage
Externa
l Circuit
Breaker
Cable
Cross-
Sectional
Area
Terminal
Type
Torque
for
Tighteni
ng Bolts
6 kVA
(dual-live-
wire input
dual-live-
wire
output)
Dual-live-
wire input
2
208 V
AC/220 V
AC
50 A
(feature
D)
6 mm
2
6 mm
2
M4 OT
terminal
1.4 N m
UPS2000-G- (6 kVA-20 kVA)
User Manual
3 Installation
Issue 18 (2021-07-16)
Copyright © Huawei Technologies Co., Ltd.
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