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SUN2000-(12K-25K)-MB0 Series
User Manual
5.5.5 Connecting the NS Protection Signal Cables
Connecting NS Protection Signal Cables to Inverters
Figure 5-33 Connecting cascaded inverters to the NS protection switch
Step 1 Connect the signal cables of the cascaded inverters to the signal cable connectors.
Issue 01 (2023-04-30)
NO TE
● The NS protection function is applicable to grid code VDE-AR-N-4105, SWITZERLAND-
NA/EEA:2020-LV230, or FINLAND-EN50549-LV230.
● The NS protection switch is connected to GND (pin 1) at one end and to DIN5 (pin 6) at
the other end. The switch is turned off by default. When the switch is turned on, NS
protection is triggered. Rapid shutdown and NS protection use the same pins, which are
GND (pin 1) and DIN5 (pin 6). Therefore, you can use only one of the functions.
● The NS protection switch connection is the same for a single inverter and for cascaded
inverters.
● Log in to the FusionSolar app as an installer, choose Me > Device commissioning, and
connect to the WLAN hotspot of the inverter. Log in to the local commissioning system
as an installer, choose Settings > Feature parameters > Dry contact function, and set
Dry contact function to NS protection.
Copyright © Huawei Digital Power Technologies Co., Ltd.
5 Electrical Connections
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