SMA Solar Technology AG 6 Electrical Connection
Installation Manual SI80H-60H-OffGrid-IA-en-11 35
6.3 Earthing the TN Off-Grid System
If the off-grid system is a TN system, earth the off-grid system as follows:
1. Earth the earthing busbar.
2. Connect PE to the earthing busbar on the load side or the generator side.
3. Connect N to the earthing busbar.
6.4 Earthing the TT Off-Grid System
If the off-grid system is a TT system, earth the off-grid system as follows:
1. To earth loads:
• Earth the neutral point for loads.
• Connect the PE of the loads to the neutral point.
• Connect N of the loads to the neutral point.
2. To earth the AC sources in the stand-alone grid:
• Earth the neutral point for AC sources in the stand-alone grid.
• Connect PE of the AC sources in the stand-alone grid to the neutral point.
• Connect N of the AC sources in the stand-alone grid to the neutral point.
3. To earth the external energy sources:
• Earth the neutral point for external energy sources.
• Connect PE of the external energy sources to the neutral point.
• Connect N of the external energy sources to the neutral point.
30 If present:
Connect the auxiliary contact of the transfer switch.
Section 6.28
31 If present:
Connect the external generator request.
Section 6.29
Procedure See
To Next Page
Loading...
