SMA Plug-in Grounding - Manual (Page 30)

Inspecting and Replacing the fuse of the SMA Plug-in Grounding SMA Solar Technology AG
30 Erdung_HF-IXX105020 Installation Guide
5 Inspecting and Replacing the fuse of the SMA Plug-in
Grounding
If a ground fault in the PV plant occurs, the SMA Plug-in Grounding reacts in accordance with the
residual current:
• The fuse of the SMA Plug-in Grounding interrupts a suddenly occurring intense esidual current.
This action destroys the fuse.
• The inverter detects lingering residual currents (see section 6.2 ”Error Messages” (page 35)).
If you eliminate the ground fault in time, you can avoid the destruction of the fuse.
After having eliminated the ground fault (see the inverter's installation guide), you will need to inspect
the fuse of the SMA Plug-in Grounding and replace it if necessary. You can order a new fuse from
SMA Solar Technology AG (Order No. KLKD-1).
Procedure
1. Disconnect the inverter on the AC and DC sides as described in the inverter's installation guide.
2. Before you replace the fuse, make a note of the generator's grounding type (" − " or "+").
3. Remove the SMA Plug-in Grounding by pulling it
downwards.
4. Hold the connecting part of the SMA Plug-in
Grounding tightly, loosen the cap and pull it off.
WARNING!
Fire hazard caused by the use of inappropriate fuses!
• Only use fuses of the type Littelfuse KLKD-1 to avoid fire hazards.