Pakton PTE1000 Series Installation & User Manual - page 33
Installation and User Manual for PTE1000 V4
08/07/2006 10:11 PM
Page 33 of 43
11.0 Sector Setup Tests and Adjustment
With a single sector system there are three considerations for the electric fence monitor
voltage level.
1.
The monitor
should
go into alarm if one of the live wires is shorted to ground.
2.
The monitor
should
alarm if one of the live wires is cut.
3.
The monitor
should not
go into alarm when dew forms on the insulators, it rains, grass
touches the wires, spider webs, dust etc. etc.
For multi sector fences there is a fourth:
4.
That if one sector is shorted other sectors
should not
go into alarm (as it is then difficult
to tell where the problem is).
Use common sense and turn the energiser off when making changes to the fence, then turn
the energiser back on to check the effects.
Basic fence tests.
1.
Energise the newly completed fence.
2.
Use an Electric Fence Power Probe to find any construction faults.
3.
Check that there is voltage on all live wires (continuity) and that there is no shorts from
live to earth, or between live circuits (Bi-polar).
4.
Check the electric fence earth (see electric fence manuals) One method is to: make an
intentional short from live wire to earthed metal (not +ve to -ve if using Bi-polar). The
voltage at the earthed point should be less then a few hundred volts, the voltage on the
earth stake with respect to any nearby earthed metal should be less then a few hundred
volts.
5.
Record the start and end of fence live wire voltages, note Bi-polar systems should have
approximately equal voltages with respect to earth.
6.
Record the live wire currents going out from the energiser to the fence.
At this point you must have a reasonable voltage on all parts of the fence. To be an effective
barrier the Power Probe (or voltmeter) readings between wires (live to earth or +ve to -ve for
Bi-polar) must be greater then 3.0kV. If it is not then you may require a larger energiser.
Fault condition tests
1.
To simulate a break. Disconnect a joint(s) in the live wires at some convenient point on
the fence, making sure that the wires do not short to ground or between +ve and -ve
wires.
2.
Check that the monitor goes into alarm. If not check the voltage (using a electric fence
voltmeter) at the inputs to the monitor. Set the fence alarm voltage level higher than this
voltage. If there is still considerable voltage you may have induced voltage in the feed
back wires. If so, reduce the induced voltage by placing a 3000 ohm 10 watt resistor
across the live to earth terminals (or from +ve to -ve in a Bi-polar system) at the monitor.
3.
Reconnect the live wires (from step 3).
4.
Place a short on the fence live wires.
5.
Check that the monitor goes into alarm.
6.
Remove the short (from step 6).