Step 3 Switch o the mains AC input circuit breaker K
m
1, bypass AC input circuit breaker
K
b
1, and output circuit breaker Q1 of the UPS. After all indicators turn o and
fans stop, the UPSs shut down, and the loads power o.
The operations in Step 3 are performed when the mains input and bypass input use
dierent power sources. When they use the same power source, you only need to switch o
the UPS AC input circuit breaker.
Step 4 Switch o the external battery circuit breaker (if any) or disconnect battery cables.
----End
5.2.4 Performing EPO
Turn on the EPO switch (provided by the customer). The UPS enters the EPO state.
That is, the UPS shuts down the inverter, and does not transfer to bypass mode.
Figure 5-7 shows the EPO cable connection on a single UPS.
Figure 5-7 EPO cable connection on a single UPS
● For UPS2000-G-15KRTL-01/UPS2000-G-20KRTL-01, choose Settings > System
Parameters > Other Settings and set EPO Enable to Enable.
● Connect an external switch to the EPO port on the UPS. After you turn on the switch,
the inverter shuts down, and the UPS will not transfer to bypass mode. Output terminals
completely power o, which meets the EPO purpose.
● The external EPO switch (switch or dry contact signals controlled by a switch) is
provided by the customer.
5.3 Parallel System Operations
5.3.1 Installing Cables
Context
This section describes operations on a parallel system consisting of two 15 kVA/20
kVA UPSs.
UPS2000-G- (6 kVA-20 kVA)
User Manual 5 Operations
Issue 18 (2021-07-16) Copyright © Huawei Technologies Co., Ltd. 93
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