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5.2 AC Grid Connection: 3-Phase+PE or 3-Phase+N+PE
WARNING! Death and serious injuries may occur.
Before AC wiring, please ensure AC breaker is switched off.
5.2.1 Required Protective Devices and Cable Cross-sections
It is recommended to install upstream circuit breakers between AC side and
inverter side for over current protection.
Table 5-1 Recommended upstream protection
Model
Upstream circuit breaker
RPI-M8
20A
RPI-M10
20A
RPI-M12
30A
RPI-M15
30A
RPI-M15A
30A
RPI-M20
40A
RPI-M20A
40A
RPI-M30
60A
L3
L2
L1
N
To solar inverter AC
plug
PE
G
N L1 L2 L3
The AC cable must be jacked and meet the specification in table 5-2.
Table 5-2 Wire size of AC input
Model
Current Rating
Wire size
Torque
Temperature
40 A
5 - 8 mm2
0.7 N m
Meet UL 10070
60 A
10 mm2 or 6 AWG
3Nm
Meet UL 10070
RPI-M8
RPI-M10
RPI-M12
RPI-M15
RPI-M15A
RPI-M20
RPI-M20A
RPI-M30
20