The DIN Surge Diverter
product has been designed to provide surge protection
for both 24V and 48V DC power systems, such as the floating
DC supplies typically used in solar cell applications.
Three modes of protection (line to line, and both lines
to ground) are provided to give comprehensive surge
protection to these usually floating systems.
The unit has
a maximum continuous voltages
of 60Vdc (48Vac) from line
to line, and has a 275V from each line to ground.
DSD modules incorporate an internal
thermal disconnect element, which automatically disconnects
the varistor from the network in the event of a thermal
overload. A failure of the module itself, or a sustained
abnormal over-voltage on the connected supply could
cause this situation. Should the internal disconnect
operate, a red flag appears in the transparent window
of the Status Indicator(s) on the front of the DSD.
The DSD provides for remote status
monitoring via voltage-free relay contacts. Failure
of the DSD is signified by the N/C contacts (11,14)
opening and the N/O contacts (11,12) closing. Ensure
that the voltage and current ratings of the contacts
are not exceeded (see table at right).