UPS5000-S-880 kVA
User Manual (CMI)
3 Installation
Issue 02 (2020-01-10)
Copyright © Huawei Technologies Co., Ltd.
83
Huawei does not provide the EPO switch or cable. If the cable is required, the
recommended cable is 22 AWG.
Equip the EPO switch with a protective cover to prevent misoperations, and cover the
cable with protective tubing.
Triggering EPO will shut down the rectifier, inverter, charger, and static bypass, but does
not disconnect the UPS mains input. To power off the UPS completely, open the front-end
input switch when triggering EPO.
Connect the requisite EPO switch to UPS dry contacts.
shows the cable connections for an NC EPO switch.
shows the cable connections for an NO EPO switch.
Figure 3-39
Cable connection for an NC EPO switch
Figure 3-40
Cable connection for an NO EPO switch
When the EPO switch is in the NC state, remove the jumper between EPO_NC and EPO_12V
before connection. When the EPO switch is turned off, EPO is triggered.
When the EPO switch is in the NO state, ensure that the jumper is connected between EPO_NC and
EPO_12V. When the EPO switch is turned on, EPO is triggered.