2.6 Rapid Shutdown
If optimizers are congured for all PV modules, the PV system can perform a rapid
shutdown to decrease the output voltage to below 30 V within 30s.
● If method 3 is selected for rapid shutdown, log in to the FusionSolar app as an installer
user to perform local commissioning, choose Settings > Feature parameters > Dry
contact function, and set Dry contact function to DI rapid shutdown.
Perform the following steps to trigger a rapid shutdown:
● Method 1: Turn o 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 the DC SWITCH of the inverter to OFF to trigger a rapid
shutdown. (Turning o all external switches on the DC side of an inverter can
trigger a rapid shutdown, and only the PV strings connected to the inverter
are de-energized. Turning o 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 o the switch to trigger a rapid shutdown. The distance
between the switch and the farthest inverter must be less than or equal to 10
m.
● Method 4: If AFCI is enabled, the inverter automatically performs arc fault
detection and triggers a rapid shutdown when AFCI lock protection is
implemented.
SUN2000-(8K, 10K)-LC0 Series
User Manual 2 Overview
Issue 01 (2023-09-15) Copyright © Huawei Digital Power Technologies Co., Ltd. 22
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