Installing A Backfeed Protection Device; Backfeed Protection Device Specifications - Huawei UPS2000-A-RTL Series User Manual

UPS2000-A-(6 kVA-10 kVA)-RTL
User Manual
Figure 3-7 Battery pack cable connections
Step 5 Reinstall the cover of the AC input, output, and battery wiring terminals on the UPS.
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3.3 Installing a Backfeed Protection Device

3.3.1 Backfeed Protection Device Specifications

The UPS has no built-in backfeed protection device. It is advised to install a backfeed
protection device on the input front side.
If you do no install a backfeed protection device on the input front side, attach a warning label
to the main power isolation device. The label reads like this: "This circuit supplies power to
the UPS. Before cable connection, disconnect the UPS, and check the voltage across wiring
terminals."
When battery mode is unavailable or the mains fails, the UPS internal voltages or energy may
flow back directly, or through a leakage path, to an input terminal. To minimize the risk of
electric shocks, install a backfeed protection device on the input side.
Table 3-3
Table 3-3 Rated voltages and currents for backfeed protection contactors
Issue 07 (2020-01-10)
lists the rated voltages and currents for backfeed protection contactors on the UPSs.
Model
UPS2000-A-6KRTL
UPS2000-A-
10KRTL
Copyright © Huawei Technologies Co., Ltd.
Rated Voltage/Current of
Contacts of the Backfeed
Protection Contactor
220, 230, or 240 V AC, 40 A
220, 230, or 240 V AC, 65 A
3 Installation
Recommended Backfeed
Protection Device Model
LC1-D40A (Schneider contactor)
LC1-D50A (Schneider contactor)
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