Procedure
Step 1 Turn on the SPD switch MCB 6FB7 on the 400 V side of the auxiliary transformer
cabinet.
Step 2 Turn on the incoming power switch MCCB 6QA on the 800 V side of the auxiliary
transformer cabinet.
When the transformer is powered on, a loud buzz will be generated. Then the buzz is
weakened rapidly and becomes stably low.
Step 3 Turn on the meter switch MCB 6FB8 in the auxiliary transformer cabinet.
The digital display meter is started, showing that the line voltage at the low-voltage side is
about 400 V, the phase voltage is about 230 V, and the current is 0 A.
Step 4 Turn on the auxiliary circuit switch MCB 6FB9 in the auxiliary transformer cabinet.
● The heat exchanger fan starts. The heat exchanger performs the self-check program
rst, and the internal fan rotates for approx. The internal fan stops and the external fan
rotates for about 10s. After the self-check is complete, the heat exchanger enters the
normal operating mode, and the internal fan keeps running at a low speed.
When the smoke sensor is started, the green indicator blinks slowly and no alarm sound
is generated.
● The transformer temperature sensor is started to display the current transformer
temperature.
----End
7.5 Powering On the ESS
● Before turning on the switches in the secondary devices of the ESS, check that
the AC voltage of the auxiliary power supply and bus voltage are within the
normal ranges.
● If the ESS has not been used for six months or longer after being installed, it
must be checked and tested by professionals before operation.
● Do not open the battery compartment door after power-on. Otherwise, the
system will shut down.
LUNA2000-2.0MWH-1H0, 2H0 Smart String ESS
User Manual 7 Powering On the System
Issue 02 (2021-11-15) Copyright © Huawei Technologies Co., Ltd. 110
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