Connecting A Remote Epo Switch; Tn-C System Application - Huawei UPS5000-E-400K-SMS User Manual

UPS5000-E-(400 kVA-600 kVA)
User Manual (60 kVA Power Modules)

3.2.6 Connecting a Remote EPO Switch

● The Company does not provide the EPO switch or cable. Prepare them by
● Equip the EPO switch with a protective cover to prevent misoperations, and
● Triggering EPO will shut down the rectifier, inverter, charger, and static bypass,
Connect the requisite EPO switch to UPS dry contacts.
●
●
Figure 3-37 Cable connection for an NC EPO switch
Figure 3-38 Cable connection for an NO EPO switch

3.2.7 TN-C System Application

If the TN-C system is adopted, short-circuit the input N and PE.
Issue 07 (2022-06-20)
NO TICE
yourself. The recommended cable size is 22 AWG.
cover the cable with protective tubing.
but does not disconnect the UPS mains input. To power off the UPS completely,
open the front-end input switch when triggering EPO.
Figure 3-37 shows the cable connections for an NC EPO switch.
Figure 3-38 shows the cable connections for an NO EPO switch.
NO TE
● When you use the NC status, remove the jumper between EPO_NC and EPO_12V first.
When you turn off the EPO switch, EPO is triggered.
● When you use the NO status, ensure that the jumper is connected between EPO_NC and
EPO_12V. When you turn on the EPO switch, EPO is triggered.
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