UPS5000-S-1600 kVA
User Manual
2 Overview
Issue 04 (2020-03-03)
Copyright © Huawei Technologies Co., Ltd.
43
Figure 2-28
Ports on the backfeed protection card
Table 2-15
Port description
Port Position Silk Screen
Description
MFP (mains
feedback
protection)
MFP_NO
The MFP ports are the signal ports for the mains
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.
MFP_COM
MFP_NC
BFP (bypass
feedback
protection)
BFP_NO
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.
BFP_COM
BFP_NC
RSV
(reserved)
RSV_NO
Reserved
RSV_COM
RSV_NC