UPS5000-E-(40 kVA-320 kVA)
User Manual
2 Overview
Issue 10 (2015-09-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
23
Silk Screen
Description
UPSs require
N
parallel cables so that at least two parallel cables are
connected to each UPS, which improves connection reliability.
BSC
The BSC port is used in a dual-bus system to synchronize output
frequencies and phases between UPS systems, ensuring that two buses
can switch with each other.
2.4.2.3 Dry contact card
The dry contact card allows the UPS to control and monitor the battery circuit breaker (BCB)
box and implement remote emergency power-off (EPO). The maximum voltage/current is 12
V/200 mA or 5 V/100 mA.
shows the signal ports on the dry contact card.
Figure 2-12
Dry contact card
describes the ports on the dry contact card.
Table 2-3
Ports on the dry contact card
Port
Silk Screen Description
Status
-
BTG
Detects battery ground
failures
Status:
Connected: battery grounding
failure
Disconnected: no battery
grounding failure
The initial status is Disconnected.
0 V
Secondary side ground
GEN
Detects D.G. mode
Status:
Connected: D.G. mode
Disconnected: non-D.G. mode
The initial status is Disconnected.
0 V
Secondary side ground
BCB
OL
Detects the BCB box
Status:
Grounded: BCB box
connected
Floated: BCB box not
connected
The initial status is Grounded.