Danger
Danger
Caution
Notice
Installation
20
4) Cables of the following specification will be equipped by the user.
21
3.6.4 Steps for electrical connection
Tab.3-5: Recommended cable specification
DC cable(+)
2
4
4
DC cable(-)
2
4
4
AC cable(L)
4
6
6
AC cable(N)
4 6
6
AC cable(GND) 4 6
6
Communication
cable (RS485)
Name
3.6.4.1 Steps for DC connection
Tip
Tip
Tip
Tip
Fig.3-26
Fig.3-27
Steps for DC cable wiring
Installation
0.5
1.5 1
DC cable between the inverter and the assembly shall be the
special PV cable. The voltage drop from the terminal box to the
inverter is about 1-2%. It is recommended the inverter is
installed on the assembly support for generation to reduce the
cable cost and the DC loss.
High performance and high quality PV array shall be used. The
open circuit voltage in the serial array must be lower than the
maximum DC input voltage in the PV grid-tied inverter, and the
working voltage of the serial array must comply with the MPPT
voltage of the serial array must comply with the MPPT voltage
in the PV grid-tied inverter.
●
Protect the LCD panel during wiring;
●
Protect the LCD panel and other elements from scratch or
damage by cables or tools.
1) Using the striping tool to cut the PV cable, and makes the cooper wire
reveal as 0.7cm.
In order to balance each PV series, Cable shall be with the same
sectional area.
Different colors of cables shall be used for differentiating in
assembling. For example: the positive pole is connected by a red
cable and the negative by a blue cable.
When designing the PV array, make sure the maximum
open circuit voltage is not higher than 550V at each series
of PV group. Otherwise the inverter will be damaged
irreversibly
If the inverter has been electrified and tested before
connection, wiring can not be performed unless the AC and
DC power supplies are cut off for 10min and a multimeter
shows that the DC side is tatally discharged.
Please cover the PV array by lightproof material or switch
off the DC circuit breaker before electrical connection. A
dangerous voltage will be generated by the PV array
exposed in the shine.