Electrical Connections; Grounding - CanadianSolar CSI-185K-T600GL03-U Installation And Operation Manual

3. Installation
5. Use screws in the packaging to fix the inverter to the mount bracket
Figure 3.8 Fix the inverter

3.4 Electrical Connections

Inverter design uses PV style quick-connect terminal. The top cover needn't be opened
during DC electrical connection. The labels located the bottom of the inverter are described
below in table 3.1. All electrical connections are suitable for local or national standard.
Parts Connection
DC terminal PV strings
Ground terminal AC ground
Grid terminal Grid
RS-485 terminal Communication cable
COM terminal Wi-Fi/Cellular stick
DC surge protection
NA
device
Table 3.1 Electrical connection symbols
The electrical connection of the inverter must follow the steps listed below:
1. Switch the Grid Supply Main Switch (AC) OFF.
2. Switch the DC Isolator OFF.
3. Connect the inverter to the grid.
4. Assemble PV connector and connect to the Inverter.
.14.
.
Torque:1.5-2.2 ft.lbs
Torque
Cable size
12-10 AWG NA
2-1 AWG 7.4-8.9 ft.lbs
2 AWG-600 MCM
7.4-14.6 ft.lbs
(Max 300mm²)
20-18 AWG 0.44 ft.lbs
NA NA
NA NA

3.4.1 Grounding

To effectively protect the inverter, two grounding methods must be performed.
Connect the AC grounding cable (Please refer to section 3.4.3)
Connect the external grounding terminal.
To connect the grounding terminal on the heat sink, please follow the steps below:
1) Prepare the grounding cable: recommend to use the outdoor copper-core cable.
The grounding wire should be at least half size of the hot wires.
2) Prepare OT terminals: M10.
Important:
For multiple inverters in parallel , all inverters should be connected to the
same ground point to eliminate the possibility of a voltage potential existing
between inverter grounds.
3) Strip the ground cable insulation to a suitable length.
Figure 3.9 Suitable length
Important:
B (insulation stripping length) is 2mm~3mm longer than A (OT cable
terminal crimping area) .
3. Installation
B
A
.15.