Installation Manual
41
Circuit breaker
Function
Q1
Control the internal power supply mode
Q2
Control the external power supply mode
Distinguish between the circuit breakers for controlling the internal and external
power supply modes according to device markings.
The user can select the desired power supply mode according to the following settings.
7.12.2
Internal Power Supply
The internal power supply mode has been set before delivery, and it can be used
directly without any setting.
Proceed as follows to set the internal power supply mode:
Step 1
Disconnect the Q2.
Step 2
Connect the Q1.
7.12.3
External Power Supply (Optional)
Live line operation can cause lethal electrical shock!
Disconnect all devices before connecting to external power supply.
The inverter will activate protection function to disconnect external loads from
power supply in case the grid voltages get abnormal.
The external power supply needs to be 3-phase 380V AC current at most, and power
supply power of each inverter needs to be 4 kW at most. The cross-sectional area of each
cable for external power supply needs to be no less than 4mm
2
. Proceed as follows to set
the external power supply mode:
Step 1
Connect Q2.
Step 2
Connect the three-phase AC380V cables to Q2.
Step 3
Disconnect Q1.
The function of automatic switching between internal and external power supply
modes is optional.
7.13
Closing the Cable Entrance
Conduct a thorough inspection after all electrical connections.
Perform the following operations after ensuring correct and firm cable connections.
