Delta RPI Series, Operation And Installation Manual

Page: 16 / 154

4.2. AC Grid Connection: 3-Phase+PE or 3-Phase+N+PE
WARNING ！
Before commencing AC wiring, please ensure AC breaker is switched off.
4.2.1. Required Protective Devices and Cable Cross-sections
It is recommended to install an upstream circuit breaker between AC side
and inverter side for over current protection.
The AC cable must be jacketed and meet the specifications in table 4-2.
RPI-M15A and M20A support both 3P3W (3phase and PE) and
3P4W (3phase, N and PE) connections.
Model Upstream circuit breaker
RPI-M15A 30A
RPI-M20A 40A
Model Current Rating Recommended Torque Cable size
40 A RPI-M15A 0.7 N.m
G N L1 L3 L2
N
L1
L2
L3
PE
To solar inverter
AC plug
Table 4-1 Recommended upstream protection
Table 4-2 AC input cable requirement
40 A RPI-M20A 0.7 N.m
6 mm
2
or 10 AWG / 8 AWG
6 mm
2
or 10 AWG / 8 AWG
16
Wiring