15 / 67
User’s Manual 3PH 100KTL-136KTL-HV
Rev. 1.0 24/02/2021
Identification: MD-AL-GI-00
Rev. 1.0 of 24/02/2021 - Application: GID
Inverter functions
A. Energy management unit
Remote control to start/ shunt down inverter through an external control.
B. Feeding reactive power into the grid
The inverter is able to produce reactive power thus to feed it into the grid through the setting of the phase
shift factor. Feed-in management can be controlled directly by the grid company through a RS485 interface.
C. Limited the active power fed into the grid
If enable the limited of active power function, inverter can limit the amount of active power fed into the grid
to the desired value (expressed as percentage).
D. Self-power reduction when grid is over frequency
When the grid frequency exceeds the limit set, the inverter reduces the power in order to ensure the
stability of the grid.
E. Data transmission
The inverter (or a group of inverters) can be monitored remotely via an advanced communication system
based on RS485 interface and external data loggers or via Wi-Fi.
F. Software update
USB interface for uploading the firmware, remotely uploading is available.
2.3.
Module protection
A. Anti-islanding
The inverter is equipped with a protection system that automatically shuts down the system during power
outages. This is called an “anti-islanding” system. This protects electrical workers when they are trying to
repair lines on the grid, in compliance with the applicable national laws and regulations.
B. RCMU
The inverters are equipped with a redundancy on the reading of the ground leakage current, on both the
direct and alternating current sides. The ground leakage current is measured simultaneously and
independently by two different processors: it is sufficient for one of the two to detect a fault in order to
trigger the protection, resulting in separation from the grid and shutdown of the operation.
C. Grid monitoring
Continuous monitoring of the grid voltage to ensure that the voltage and frequency values stay within the
operating limits.
D. Internal protection of the inverter device
The inverter has all kinds of internal protections to protect the device and internal components when
abnormal situations occur on the grid or DC input line.
E. Ground fault protection
The inverter must be used with photovoltaic modules connected with “floating” connections, i.e. with
positive and negative terminals that are not grounded. An advanced ground fault protection circuit
