Rapid Shutdown - Huawei SUN2000 User Manual

SUN2000 Smart PV Optimizer
User Manual
Figure 4-5 Detect optimizer disconnection

4.3 Rapid Shutdown

When the output is disconnected or the inverter shuts down, the optimizer can
adjust the module output voltage to a safe range to ensure the safety of the
construction and O&M personnel as well as firefighters.
If optimizers are configured for all PV modules, the PV system can perform a rapid
shutdown to decrease the output voltage to below 120 V within 15s and to below
30 V within 30s.
Perform the following steps to trigger a rapid shutdown:
●
●
●
Issue 03 (2022-09-20)
NO TE
● The rapid shutdown function is not supported if optimizers are configured for some PV
modules.
● 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.
Method 2: Turn off the DC switch on the inverter.
Method 3: Connect a switch to the DI and GND ports of the inverter to form a
circuit. (For details about the DI port, see the corresponding inverter user
manual.) The switch is turned on by default. Turn off the switch to trigger a
rapid shutdown.
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