System Layout Of Units Without Integrated Dc Switch - Recom RCM SP-D Series User Manual

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4.6 System Layout of Units without Integrated DC Switch

Local standards or codes may require that PV systems are fitted with an external DC switch on
the DC side. The DC switch must be able to safely disconnect the open-circuit voltage of the PV
array plus a safety reserve of 20%. Install a DC switch to each PV string to isolate the DC side of
the inverter. We recommend the following electrical connection, as shown in Figure 4-24:
26
Insulator ring
Nut
Metal plate
Sealing ring
1
Port 1
2
3
1
Port 2
2
3
1
2
3 Port 3
4
5
6
3/6pin connector
Figure 4-22
Figure 4-23
20-25mm
6mm
20-25mm
6mm