Figure 4.5 Connection area of inverter(
Fuse type
)
DC1+
DC1-
DC2+
DC2-
L1 L2 N
.13.
4. Installation
Please refer figure 4.5 and 4.6 to connect the DC1 and DC2 in the DC terminal of inverter,
then connect the array mounting bonding conductor to two “PE” terminal of DC side. The
DC wire connected to DC terminals (shown in Figure 4.5 and 4.6) is recommended
AWG12-8. For fuse type inverter KLM-20 of Cooper Bussmann or the same type, only
professional can replace it.
Connect grid side of inverter:
The inverter is suitable for 208V and 240V grid. Please see table 4.1 to connect cable to
inverter terminals. Due to inverter monitors voltage between L1 and L2, Neutral could be
either connected or not for 240V grid. Ground must be connect to the PE terminal. The
cable for grid connection to AC terminals (“L1”, “L2”, “N” and “PE”) is recommended for
AWG 4-8. For fuse type inverter, KLM-30 of Cooper Bussmann or the same type could be
used, only professional can replace it.
Before electrical connection Please make sure below steps are strictly followed:
a. Switch the Grid Supply Main Switch (AC) OFF.
b. Switch the DC Switch OFF.
.12.
4. Installation
Terminal connections:
Before connection, please make sure the polarity of the output voltage of PV array
matches the
“
DC+
”
and
“
DC-
”
symbols.
Warning
Before connecting inverter, please make sure the PV array open circuit voltage is
within the limit of the inverter. Otherwise the inverter could be damaged. The
maximum allowable input short circuit current limit of the photovoltaic array for each
MPPT input channel is 10Adc for the 1-3.6kW models and it is 15Adc for the
4-5kW
models.
Please don’t connect PV array positive or negative pole to the ground, it could
cause serious damages to the inverter
Please use qualified DC cable for PV system.
Fuse type
connection:
Strip the end of wire about 10mm, loose the screw on the terminal, then insert the wire
into the terminal. Tight the screws with the torque of 5Nm.
Non-Fuse type
connection:
Strip the end of wire about 18mm. Use a slotted screwdriver, insert to the end of the
terminal A and insert the wire into the terminal B. Loose the screwdriver, the cable will be
fixed in the terminal.
Figure 4.6 Connection area of inverter(
Non-Fuse type
)
Terminal A
Terminal B
Connect PV side of inverter:
For fuse type: Damage to the inverter through the use of fuses as disconnecting
units in the output circuit of the inverter.
WARNING:
Damage to the DC Disconnect due to enlarged knockouts.
Enlarged knockouts enable moisture to penetrate the DC Disconnect which
could damage electronic components in the DC Disconnect.
Note:
