5) Manually switch off the three-phase AC main circuit breaker outside the energy storage
cabinet, so that the main circuit of the energy storage system is powered down.
6) Auxiliary power part of the power down
Disconnect the QA5 circuit breaker in the auxiliary power box;
Disconnect the QA4 circuit breaker in the auxiliary power box, then all the BCUs in the high-
voltage box, all the BMUs in the battery PACK are powered down;
Disconnect the QA3 circuit breaker, then the CMU module, fire fightin system, dehumidifier,
flooding switches, lighting and other equipment is powered down;
Disconnect the QA2 Circuit breaker, then the cabinet liquid cooling unit power down;
Disconnect the socket and RCD01 leakage protection switch (if there is a closed switch is
disconnected);
Disconnect the auxiliary power box total input switch QA1.
Figure 6.7 Functional switch within the auxiliary power module
7) Disconnect the auxiliary power box single-phase AC circuit breaker outside the energy
storage cabinet, so that the auxiliary power down operation of the energy storage system is
completed.
6.4 Emergency power-down operation
The premise of this step is that the energy storage system is powered up and running in the
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