Wiring; Preparation Before Wiring - Delta RPI-M8 User Manual

5. Wiring

5.1 Preparation before Wiring

1. Ensure voltage values and polarities are correct.
2. When grounding the solar array, an isolation transformer is required due to
the RPI-series not having galvanic isolation between the DC-input and
AC-output.
3. The ground fault detection is a fixed internal setting. It cannot be modified.
4. Whole system wiring and connections can be seen in Figure 5-1 and 5-2.
5. Inverter can accept DC inputs in parallel (1 MPP tracker/2 parallel inputs).
6. Different DC connection type needs different settings of insulation detection.
About setting, please refer to 7.2.6.3 Install Setting.
* Some models can support 3P3W
system, please refer to table 5-3.
Figure 5-1 Connection of a system for floating DC inputs
PV Array
1 AC Wiring
1 L1
2 L2
3 L3
*
4 N
PE
3
DC Distribution box
DC1 DC2
2
Communication
Wiring
DC Wiring
Parallel or
Separate
18