Electrified fence switching device

DETAILED DESCRIPTION According to a first aspect of this invention there is provided an electrified fence generator switching device consisting of a D.
C.
pulse means physically separate from a switching circuit.
The switching circuit comprises a D.
C.
detector feeding a bistable switch which controls a switching means control coupled to or adapted for control coupling to a generator of an electrified fence.
The switching circuit incorporates a voltage integrator, an A.
C.
filter means and a D.
C.
voltage isolation means to isolate the generator from the fence when connected as aforesaid to the device.
According to a second aspect of this invention there is provided an electrified fence system comprising an electrically insulated fence, a generator coupled to the fence through D.
C.
isolation means, a switching circuit comprising a D.
C.
detector feeding a bistable switch circuit operating switching means which in turn controls the generator.
A detector input circuit is coupled to the fence and incorporates a voltage integrator A.
C.
filter means.
A physically separate D.
C.
pulse device is provided to energize the fence to trigger the switching circuit.