38 Product manual - PVS-175-TL;A.1 Version
EN
3.14 Safety devices
3.14.1 Anti-Islanding
In the event of a local grid outage by the electricity company, or when the equipment is switched off for
maintenance operations, the inverter must be physically disconnected to ensure the protection of the
people working on the grid, in accordance with the relevant national laws and regulations. To prevent
possible islanding, the inverter is equipped with an automatic safety disconnection system called “Anti-
Islanding”.
The method used to ensure an active anti-islanding protection is: active frequency drift in combination
with RoCoF techniques.
NOTE – D Anti-islanding protection mechanisms are different depending on the grid standards,
even if they all have the same purpose.
3.14.2 Ground fault of the photovoltaic panels
ATTENTION – A Use this inverter with panels connected in “floating” mode, i.e. with no earth
connections on the positive and negative terminals.
An advanced ground fault protection circuit continuously monitors the ground connection and disconnects
the inverter when a ground fault indicating the fault condition by means of the red “GFI” LED on the LED
panel (08) on the front side of wiring box.
3.14.3 Overvoltage surge arresters (-SX/SX2 models only)
As an additional protection to prevent damage caused by the discharges from lightning and electrostatic
induction phenomena, this inverter is equipped with DC over-voltage surge arresters (24) and with AC
over-voltage surge arresters (25).
3.14.4 Other safeguards
This inverter is equipped with additional protective devices to ensure safe operation in any circumstance.
These protections include:
•
Constant monitoring of the grid voltage to ensure that voltage and frequency values remain within
operating limits;
•
Internal temperature control to automatically limit the power (if necessary) to prevent overheating of
the unit (derating).
NOTE – D The numerous control systems determine a redundant structure to ensure absolutely
safe operations.
To Next Page
Loading...
Need help?
General