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HOW A ELECTRIC FENCE WORKS
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The system works by sending a high-voltage electrical pulse around a multi-wire perimeter fence, the potential involved may be in the order of 2,500 to 12,000 volts, the current is limited to a safe level and the actual pulse lasts only milliseconds.
The source of the high-voltage electrical pulse is an electric fence "energizer"
When an individual trying to breach the fence, comes into contact with the fence by climbing over/under, the "Live" fence will become part of an electrical circuit between the output terminals of an energizer, a high voltage pulse will flow through the body of the individual to the closest earth, Contact with the wire results in an electric shock. It’s a memorable experience and not one you’d want to repeat in a hurry – 8000 volts with 3 or 4-joule power is not to be trifled with.
It’s like being hit very hard with a cricket bat between the shoulder blades leaving the perpetrator temporarily incapacitated.
The duration of the shock is around 3/1000ths of a second. It’s safe enough though; the equipment has to be tested and certified to strict international safety standards. The shock factor is the deterrent in the system, but as impressive as that may be the real value is in the detection capability.
The strength of the shock depends upon the power available from the energizer, and the total resistance of the circuit.
Electric Fencing not only offers effective protection but also a psychological deterrent, if the fence wires are deflected by vertical movement, contacting strands either side or cutting the strands, the system will cause a short circuit on the fence line, and trigger the alarm, giving an audible and visual indication of a fence breach.
The fence controller is a monitored alarm system; the fences can be zoned for easier detection of breaching.
False alarms are virtually non-existent, as the fence will only go into alarm when a concerted effort is made to break the perimeter security.
Our existing clients have reported the system as paying for itself within twelve months of installation.
To date this system has proven to be a very reliable and highly effective security system. In sites previously subjected to a number of attacks the system has eliminated all losses and in some cases removed the need for a resident security guard.
The system is capable of protecting and controlling any number of zones providing a very flexible solution for most requirements.
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