Parallel System Commissioning; Configuring Ecm Communication Jumpers - Huawei UPS5000-E User Manual

UPS5000-E-(400 kVA-800 kVA)
User Manual (50 kVA Power Modules)
Wear personal protective equipment and use dedicated insulated tools to avoid
electric shocks or short circuits.

5.1 Configuring ECM Communication Jumpers

Prerequisites
An ESD wrist strap and ESD gloves are available.
Procedure
Step 1 Check the number of UPSs connected in parallel.
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Step 2 Connect the ground cable of the ESD wrist strap, and wear the ESD wrist strap and
ESD gloves.
Step 3 Remove the two ECMs from the upper part of the UPS cabinet control module.
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Issue 17 (2023-07-10)
5

Parallel System Commissioning

D ANGER
If more than four UPSs are connected in parallel, perform the following steps
to remove jumper caps from the ECMs on all the UPSs.
If four or fewer UPSs are connected in parallel, skip the following steps.
Loosen the captive screws on an ECM.
Push the micro switch on the ejector lever.
Pull the ejector lever outwards to remove the ECM from the subrack.
Remove the ECM.
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