Ac Grid Connection: 3-Phase+Pe Or 3-Phase+N+Pe; Required Protective Devices And Cable Cross-Sections - Delta RPI Series Operation And Installation Manual

4.2 AC Grid Connection: 3-Phase+PE or 3-Phase+N+PE

- 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.
G N L1
The AC cable must be jacketed and meet the specifications in Table 4-3.
If there is any conflict between Table 4-3's specification and local electrical code,
please follow the electrical code.
Model Current Rating
RPI M50A
_12s
End sleeve for each wire is necessary if 25mm
End sleeve is not able to be installed if 1AWG is applied.
RPI M50A support both 3P3W (3phase and PE) and 3P4W (3phase, N and PE)
connections.
WARNING !
Model
RPI M50A
_12s
Table 4-2 : Recommended upstream protection
L2 L3
Wire Size
25-38mm
100 A
3-1AWG
Table 4-3 : AC input cable requirement
Upstream circuit breaker
100A
L3
L2
L1
N
PE
Cable size
2
37-44mm
2
or 3AWG is applied.
21
To solar inverter
AC plug
Recommended Torque
N ・ｍ
3
Wiring