Intended Use - Santon FSS-A300-FU Handbuch

FIREFIGHTER SAFETY SWITCH
USER INSTRUCTIONS

Intended use

The Firefighter safety switch (FSS) has been especially developed as an additional device for direct
current (DC) photovoltaic installations. The motor driven DC disconnect switch is made to withstand a
continuous current flow at a maximum of 25A at a string voltage of 750 VDC, or 16A at a string voltage
of 1000 VDC.The DC disconnect switch is used to disconnect the connected strings of the installation
in case of an emergency situation, either under load or no-load situations. Such an emergency situation
could be in case of fire.
Firefighter Safety Switch
The switch enclosure needs to
be placed as close to the string
entry of the building as possible
and may be placed in outdoor
situations when needed. Due
to its enclosure, the switch is
protected against external
influences like dust and
moisture. The whole set-up
is conforms to IP65. This will
make it resistant to direct water
jets from all directions.
Operating Panel
The firefighter must be able to safely
disconnect the photovoltaic installation
which is in operation and make sure
the installation is completely switched
off before proceeding further. To aid the
firefighters, the operating panel must
be used in case of emergency to switch
off the installation. The operating panel
therefore needs to be placed in an easy
to access location. The operating panel
must be visible for fire fighters so they
can see the status and instantly act in
case of an emergency.
NOTE: The switch enclosure and/or the operating panel enclosure may not be installed in direct sunlight
or be in direct contact with (continuous) ingress water.
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Junction Box (optional)
Combining individual string
cables into lead cables to the
inverter. Can optionally include
fuses, overvoltage protection
and arc fault detection.
Inverter
String or lead cables join into the inverter
which provides the connection to the external
power grid.
External fire alarm (optional)
An external alarm can also be
connected to the Operating
Panel and thereby activate
the disconnection of the safety
switches.