Function Description; Unpacking And Storage; Unpacking And Inspection - CanadianSolar CSI-75K-T40001-E User Manual

2.4 Function Description

The inverter is equipped with the following functions:
1) Conversion function
The inverter converts the DC current into grid-compatible AC current and feeds the AC current into the grid.
2) Data storage
The inverter logs running information, error records, etc.
3) Parameter configuration
The inverter provides various settable parameters. Users can set parameters via the App to meet the requirements and
optimize the performance.
4) Communication interface
The inverter is designed with standard RS485 communication interfaces.
The standard RS485 communication interfaces are used to establish communication connection with monitoring
devices and upload monitoring data by using communication cables.
After communication connection is established, users can view inverter information or set inverter parameters through
the iSolarCloud.
5) Protection Function
The protective functions are integrated in the inverter, including anti-island protection, LVRT/ZVRT, DC reversed polarity
protection, AC short circuit protection, leakage current protection, DC overvoltage/overcurrent protection, etc.
6) PID function (optional)
After the PID function is enabled, the voltage to ground of all PV modules is greater than 0, that is, the PV module-to-
ground voltage is a positive value.
• Before enabling the PID recovery function, make sure the voltage polarity of the PV modules to
ground meets requirement. If there are any questions, contact the PV module manufacturer
or read its corresponding user manual.
• If the voltage scheme for the PID protection/recovery function does not meet the
NOTICE
requirement of corresponding PV modules, the PID function will not work as expected or
even damage the PV modules.
• Anti-PID function
When the inverter is running, the PID function module rises the potential between the negative pole of the PV array and
the ground to a positive value, to suppress the PID effect.
Make sure the inverter is applied to an IT system before enabling the anti-PID function.
• PID recovery function
When the inverter is not running, the PID module will apply inverse voltage to PV modules, to restore the degraded
modules.
• If the PID recovery function is enabled, it only works at night.
• After the PID recovery function is enabled, the voltage of the PV string to ground is 500Vdc by
default, and the default value can be modified through the App.

3 Unpacking and Storage

3.1 Unpacking and Inspection

Before unpacking the inverter, check the package appearance thoroughly, such as for holes and cracks, and check the
6 /41
FIG 2-5 PID functional system diagram
3 Unpacking and Storage