Safety devices
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 techniques RoCoF
Anti-islanding protection mechanisms are different depending on the grid standards, even if
they all have the same purpose.
Ground fault of the photovoltaic panels
Use this inverter with panels connected in "oating" mode, i.e. with no
earth connections on the positive and negative terminals. An advanced
ground fault protection circuit continuously monitors the ground connec-
tion and disconnects the inverter when a ground fault indicating the fault
condition by means of the red "GFI" LED on the LED panel on the front
side.
String fuses
In the -SX / -SY versions
02
the negative side (-) string fuses
22
and the
positive side (+) string fuses
10
are preinstalled inside the DC wiring box
and protect the appliance from currents exceeding the limit value indepen-
dently for each string.
The sizing of the fuses must therefore be carefully assessed during installation.
Overvoltage surge arresters
As an additional protection to prevent damage caused by the discharges
from lightning and electrostatic induction phenomena, the DC wiring box
02
(versions -SX / -SY), is equipped with DC overvoltage surge arresters
15
and the AC wiring box
05
(version -SX), with AC overvoltage surge
arresters
18
.
To Next Page
Loading...
