Figure 6-58 Conceptual diagram of a dual-bus parallel system
----End
6.6 Connecting a Backfeed Protection Card
Prerequisites
NO TICE
● A backfeed protection card is installed.
● The backfeed protection card uses relay contact signals and it can connect to
any power signal with a voltage of 240 V AC or less and a current of less than
4 A.
● The backfeed protection card needs to be powered by the UPS output or a
more reliable third-party power supply to ensure that the backfeed protection
card can isolate faults if backfeed faults occur during power supply in battery
mode.
Procedure
Step 1 Connect cables to the backfeed protection card.
●
If the UPS output power supply is used, select a shunt release that matches
the rated voltage based on the voltage system. (Currently, only the 800 kVA
UPS supports this feature.)
UPS5000-H-(400 kVA-800 kVA)
User Manual (100 kVA Power Module)
6 Installation
Issue 02 (2021-04-22)
Copyright © Huawei Technologies Co., Ltd.
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