Powering On The Distribution Transformer - Huawei LUNA2000-2.0MWH Series User Manual

LUNA2000-2.0MWH Series Smart String ESS
User Manual

7.6 Powering On the Distribution Transformer

Before connecting the power supply, ensure that all switches of the Distribution
Transformer are turned off.
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.
Step 3 Turn on the meter switch MCB 6FB8 in the auxiliary transformer cabinet.
Step 4 Turn on the auxiliary circuit switch MCB 6FB9 in the auxiliary transformer cabinet.
----End
Issue 08 (2022-11-15)
CA UTION
NO TE
When the transformer is powered on, a loud buzz will be generated. Then the buzz is
weakened rapidly and becomes stably low.
NO TE
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.
NO TE
● The heat exchanger fan starts. The heat exchanger performs the self-check program
first, and the internal fan rotates for about 10s. 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.
Copyright © Huawei Technologies Co., Ltd.
7 Powering On the System
147