Electrical Connections - CanadianSolar CSI-25K-T400 Series Installation And Operation Manual

5. Installation
WARNING:
The inverter must be mounted vertically, refer to section 5.1.
4. Lift the inverter and hang it on the bracket, and then slide down to make sure they
match perfectly.
Figure 5.5 Install the inverter
5. Use screws in the packaging to fix the inverter to the mount bracket
.12.
.
Figure 5.6

5.3 Electrical Connections

The inverter is equipped with quick-connect terminals so the top cover doesn't need to be
opened during the electrical connection.
DC input terminal
DC 1 ~ DC 8
ON Switch on the DC switch
Switch off the DC switch
OFF
COM1
COM port for monitoring
COM port for Meter
METER
COM port for DRM
DRM
Table 5.1 Electrical connection symbols
The electrical connection of the inverter must follow the steps listed below:
1. Switch OFF the Grid Supply Main Switch (AC).
2. Switch OFF the DC isolator. --> please note that previously it was called DC switch.
3. Connect the PV connectors from the array into the DC input of the inverter.
5.3.1 Grounding
Canadian Solar requires 2 ground protection methods: through grid terminal connection
and external heat sink connection.
When connecting the AC terminal grounding cable, please refer to the contents of 5.3.3.
When connecting the heat sink grounding cable, please follow the steps below:
1. Prepare the grounding cable: it is recommended to use a cable with
or higher with outdoor rating.
2. Prepare OT terminals: M6, see Figure 5.12.
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.
5. Installation
cross-section of 16mm²
.13.