11
For parallel operation(more than 2 inverters) and using monitoring, 485 communication terminal resistance
dddd
ON/OFF switch
3.4 Wiring
3.4.1 Main circuit wiring
1) Cautions for main circuit wiring
For input power, connect
the
inverter’s inside connector
[+]
to the inverter’s outside connector
[+]
and
the
inverter inside connector’s
[-]
to the inverter outside connector
[-],
then supply power
.
The inverter might be
damaged by wrong connection.
Do not disconnect the connecter while at power.
Keep in mind that the internal capacitor of the inverter is charged even if the power is off.
To prevent electric shock, the inverter must be earthed. Make sure that the resistance of earth is 100 mΩ or less.
Connect the terminal of the inverter to the exclusive terminal block. Do not use a case or sash screw as an
earth terminal.
For earth wire, use exclusive earth wire complying with the standard. Connect the earth terminal to the spot
adjacent to the inverter. The earth cable must be 4.0mm²or more.
Confirm the maximum input voltage of inverter and output voltage of solar panel. If the output voltage of solar
panel exceeds the maximum input voltage of inverter, the critical damage can occur to the product.
Power
Size of earth cable( mm²)
1.5 ~ 3 kW
4.0
5 kW
6.0
Confirm the maximum input voltage of inverter and output voltage of solar panel. If the output voltage of solar
panel exceeds the maximum input voltage of inverter, the critical damage can occur to the product.
For the wiring of solar panel, check the temperature coefficient to set the output voltage. Otherwise, input
over-voltage or low-voltage of inverter can occur due to the ambient temperature.
485communication
Terminal resistance connection : ON
Terminal resistance release : OFF
