Huawei UPS5000 User Manual page 10

UPS5000 Backfeed Protection Card
User Manual (03021KQQ)
Port Position
BFP (bypass
feedback
protection)
RSV
(reserved)
Figure 3-3
Figure 3-3 Cable connections between the backfeed protection card and shunt release
(1) Shunt release
The backfeed protection card needs to be powered by the UPS output or a more reliable third-party
power to ensure that the backfeed protection card can isolate faults if backfeed faults occur in battery
mode.
Issue 05 (2017-04-28)
Silk Screen
BFP_NO
BFP_COM
BFP_NC
RSV_NO
RSV_COM
RSV_NC
shows cable connections between the backfeed protection card and shunt release.
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Copyright © Huawei Technologies Co., Ltd.
Description
The BFP ports are the signal ports for the bypass
backfeed protection. NO and COM are normally
open contacts. NC and COM are normally closed
contacts. When a backfeed occurs, the normally
open contacts are closed and the normally closed
contacts are open.
Reserved.
(2) 6 A fuses
3 Product Installation
5