CCTV, Electric Fence, Gates And Garages Automation, Intercoms, Fire & Alarms systems, Access Controls
Electric fences are designed to create an electrical pulse throughout the time that it is energized. A component called a power energizer converts power into a brief High voltage pulse. One terminal of the power energizer releases an electrical pulse along a connected bare wire about once per second. Another terminal is connected to a metal rod implanted in the earth, called a ground earth rod . A person or animal touching both the wire and the earth during a pulse will complete an electrical circuit and will conduct the pulse, causing an electrical shock . The effects of the shock depends upon the voltage, the energy of the pulse, the degree of contact between the recipient, the fence, ground and the route of the current through the body; it can range from barely noticeable to uncomfortable, painful or even lethal.
Smooth steel wire is the material most often used for electric fences, ranging from a fine thin wire used as a single line to thicker, high-tensile (HT) wire. Electric fences are useful for controlling the movements of wild animals. Examples include deterring deer from entering private property, keeping animals off airport runways, keeping wild boar from raiding crops, and preventing geese from soiling areas used by people. Non-lethal electric fences are used to prevent trespass by both private and government-sector bodies. These include freight carriers, auto auctions, equipment rental companies, auto dealers, housing communities, commercial factories or warehouses, prisons, military bases, and government buildings. Many of these electric fences act as monitored burglar alarm systems in addition to causing an uncomfortable shock. Due to the high levels of crime in South Africa, it is common for residential houses to have perimeter defences.
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