E Rapid Shutdown - Huawei SUN2000 Series User Manual

SUN2000-(12KTL-25KTL)-M5 Series
User Manual
If optimizers are configured for all PV modules, the PV system can perform a rapid
shutdown to decrease the output voltage to below 30 V within 30s.
Perform the following steps to trigger a rapid shutdown:
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Issue 01 (2022-06-15)
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You are advised to periodically check whether the rapid shutdown function is normal.
Method 1: Turn off the AC switch between the inverter and the power grid
(disconnect the voltages of all PV strings connected to the inverter under the
AC switch).
Method 2: Set DC SWITCH to OFF to trigger a rapid shutdown. The inverter
shuts down several minutes later. (Turning off all external switches on the DC
side of the inverter can trigger a rapid shutdown, which only disconnects
voltages of PV strings connected to the inverter. Turning off only some
external switches cannot trigger a rapid shutdown, and the PV strings may be
energized.)
Method 3: To enable the DI rapid shutdown function, connect a switch to pins
DI and GND of the inverter communications terminal. The switch is turned on
by default. Turn off the switch to trigger a rapid shutdown. The distance
between the switch and the inverter must be less than or equal to 10 m.
Figure E-1 Connecting cables to a rapid shutdown switch
Method 4: If AFCI is enabled, the inverter automatically detects arc faults and
implements AFCI lock protection which will trigger a rapid shutdown.
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Rapid Shutdown

E Rapid Shutdown

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