Backfeed Protection Device Specifications - Huawei UPS2000-G User Manual

UPS2000-G-(6 kVA–20 kVA)
User Manual (Lead-Acid Battery)

4.3.1 Backfeed Protection Device Specifications

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 flow 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
UPS2000-
G-6KRTL
(dual-live-
wire input
dual-live-
wire
output)
UPS2000-
G-10KRTL
(dual-live-
wire input
dual-live-
wire
output)
Issue 23 (2024-03-15)
NO TICE
Single-Phase/Three-Phase
Rated Voltage
and Rated
Current
220 V AC/230 V
AC/240 V AC, 40
A
220 V AC/230 V
AC/240 V AC, 65
A
Copyright © Huawei Digital Power Technologies Co., Ltd.
Dual–Live Wire
Recommended Rated
Backfeed Voltage and
Protection Rated
Device Model Current
(Schneider
Contactor)
Contactor LC1- 208 V
D40A AC/220 V
AC, 40 A
● Single-phase 208 V
input: LC1- AC/220 V
D50A AC, 65 A
contactor
● Three-phase
input:
contactor
LC1-DT60A
4 Installation
Recommen
ded
Backfeed
Protection
Device
Model (ABB
Contactor)
Contactor
AF50-30-11*
70
Contactor
AF50-30-11*
70
61