Huawei UPS2000-G - Backfeed Protection Device Specifications

4.3.1 Backfeed Protection Device Specications
NO TICE
This equipment does not have a built-in backfeed protection device. You can add a
backfeed protection device for the input. The protection solution is as follows: If
you do not install a backfeed protection device for the input, add a warning label
on the main power disconnection device that supplies power to the UPS to warn
electrical maintenance personnel. The warning label contains information similar
to the following: "This circuit supplies power to the UPS. Disconnect the UPS
before cable connection." In addition, check whether dangerous voltages exist on
all main power connection terminals.
When battery mode is unavailable or the mains fails, certain voltage or energy in
the UPS may ow back directly, or through a leakage path, to an input terminal.
To minimize the risk of electric shocks caused by reverse feeding, install a
backfeed protection device for the UPS input.
Table 4-2 Rated voltage and current of the backfeed protection contactor
Model Single-Phase/Three-Phase Dual–Live Wire
Rated Voltage
and Rated
Current
Recommended
Backfeed
Protection
Device Model
(Schneider
Contactor)
Rated
Voltage and
Rated
Current
Recommen
ded
Backfeed
Protection
Device
Model (ABB
Contactor)
UPS2000-
G-6KRTL
(dual-live-
wire input
dual-live-
wire
output)
220 V AC/230 V
AC/240 V AC, 40
A
Contactor LC1-
D40A
208 V
AC/220 V
AC, 40 A
Contactor
AF50-30-11*
70
UPS2000-
G-10KRTL
(dual-live-
wire input
dual-live-
wire
output)
220 V AC/230 V
AC/240 V AC, 65
A
● Single-phase
input: LC1-
D50A
contactor
● Three-phase
input:
contactor
LC1-DT60A
208 V
AC/220 V
AC, 65 A
Contactor
AF50-30-11*
70
UPS2000-G-(6 kVA–20 kVA)
User Manual (Lead-Acid Battery) 4 Installation
Issue 23 (2024-03-15) Copyright © Huawei Digital Power Technologies Co., Ltd. 61