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Suntrio Plus Series
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5.5 External AC Circuit Breaker and Residual Current
Device
Please install a 4P circuit breaker to ensure the inverter is able to
disconnect from grid safely. The inverter is integrated with a RCMU,
however, an external RCD is needed to protect the system from tripping,
type A RCD is compatible with the inverter.
The integrated leakage current detector of inverter is able to detect the real
time external current leakage. When a leakage current detected exceeds
the limitation the inverter will be disconnected from grid quickly, if an
external leakage current device is connected, the action current should be
300mA or higher.
Inverter type
Recommended breaker specifications
Suntrio Plus 4K/5K/6K/8K/10K
25A
Notice: Do not connect multiple inverters to one AC circuit breaker.
Table5.4 Recommended breaker specification
5.6 Communication Connection
Suntrio Plus 4K/5K/6K/8K/10K is equipped with a RS232 and RS485 interface
Figure 5.10 Pins of nine serial port cable
5 4 3 2 1
9 8 7 6