SMA Plug-in Grounding - Manual (Page 25)

SMA Solar Technology AG Safety
Installation Guide Erdung_HF-IXX105020 25
2 Safety
2.1 Appropriate Usage
If you use specific solar cell technology types in your PV generator, e.g. thin film or backside contacted
PV modules, it may become necessary to ground either the positive or the negative terminal of the PV
plant. The SMA Plug-in Grounding facilitates the grounding of the PV generator in the inverter. The
'plug-in' grounding set is suitable for inverters of the types SB 2000HF-30, SB 2500HF-30 and
SB 3000HF-30. With the help of this device-internal grounding, a safe operation is achieved over the
long-term with optimal EMC characteristics and minimal installation costs.
The SMA Plug-in Grounding set includes a 1A fuse as a protection against fire hazard and a circuit
that adjusts the inverter's insulation monitoring to the SMA Plug-in Grounding. Via the fuse, the SMA
Plug-in Grounding establishes a direct connection between the terminal to be grounded (positive or
negative) and the PV module and the PE terminal of the inverter. If a ground fault occurs, the fuse in
the SMA Plug-in Grounding disconnects the residual current.
Information about type and requirements for a module grounding of your PV plant will be provided
by your module manufacturer.
The inverter may only be operated with PV generators (modules and cabling) that contain protective
insulation (protection class II).
The SMA Plug-in Grounding is only suitable for use with SMA inverters of the types
Sunny Boy 2000HF/2500HF/3000HF.