Connecting A Backfeed Protection Card - Huawei UPS5000-H-400 kVA User Manual

UPS5000-H-(400 kVA-800 kVA)
User Manual (100 kVA Power Module)
Figure 6-58 Conceptual diagram of a dual-bus parallel system
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6.6 Connecting a Backfeed Protection Card

Prerequisites
● A backfeed protection card is installed.
● The backfeed protection card uses relay contact signals and it can connect to
● The backfeed protection card needs to be powered by the UPS output or a
Procedure
Step 1 Connect cables to the backfeed protection card.
●
Issue 02 (2021-04-22)
NO TICE
any power signal with a voltage of 240 V AC or less and a current of less than
4 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.
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.)
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