Performing Epo - Huawei UPS2000-G Series User Manual

UPS2000-G-(6 kVA-20 kVA)
User Manual
Step 2 Switch off the AC input circuit breakers K
breaker Q1 for the UPS. After all indicators turn off and fans stop, the UPS shuts
down.
Step 3 Switch off the external battery circuit breaker (if any), or disconnect battery power
cables for the UPS. The UPS exits the parallel system.
----End
Transferring the Parallel System to Bypass Mode
Perform "shutdown operations" on each UPS in the parallel system. All inverters
shut down at the same time, and the parallel system transfers to bypass mode.
Transferring the Parallel System to No Output Mode
Step 1 Shut down the loads.
Step 2 Perform "shutdown operations" on each UPS in the parallel system. All inverters
shut down at the same time. The parallel system transfers to bypass mode.
Step 3 Switch off the following circuit breakers of the UPS system: mains AC input circuit
breakers K
circuit breakers K
circuit breakers Q1 and Q2, and general AC output circuit breaker Q. After all
indicators turn off and fans stop, the UPSs shut down, and the loads power off.
Step 4 Switch off the external battery circuit breaker for each UPS or the general battery
circuit breaker (when all UPSs share a battery string). If no external battery circuit
breaker is configured, disconnect battery cables from each UPS.
----End

5.3.4 Performing EPO

Turn on the EPO switch (provided by the customer). The UPS system enters the
EPO state. That is, the UPS system shuts down the inverters, and does not transfer
to the bypass mode.
Figure 5-13
Issue 21 (2022-10-13)
NO TE
To merely shut down the UPS, perform
1 and K 2, general mains AC input circuit breaker K
m m
1 and K
b
NO TE
Perform Step 3 when the mains input and bypass input use different power sources. If they
share a power source, you need only to switch off the UPS AC input circuit breakers, general
AC input circuit breaker, then the UPS AC output circuit breakers, and general AC output
circuit breaker.
shows the EPO cable connection in a parallel system.
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1 and K
m
Step 1 only.
2, general bypass input circuit breaker K
b
1 and the AC output circuit
b
, bypass AC input
m
, AC output
b
5 Operations
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