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An Introduction to Hotline Electric Fences
When it comes to keeping livestock in and predators out, the Hotline range of electric fencing and netting can solve almost any problem. Introduced in 1968 by AEC Electric Fencing Limited, the product portfolio was broadened in 1998 by the addition of the RENCO group’s electrified netting range and the name was changed to Hotline/RENCO Ltd.
An electric fence controls animals by giving the cow, horse, sheep, dog, deer, rabbit etc, a controlled electric shock when it comes into contact with the fence – THIS ELECTRIC SHOCK IS HARMLESS TO THE ANIMALS, but should be memorable enough for the animal not to forget the experience.
An electric fence is really a psychological barrier, it does not require huge amounts of power to be effective. But, it should be well designed and constructed to take some pressure from animals and the weather.
Electric fencers (energisers) work by passing a small amount of current through the animal and into the ground. This circuit is easily achieved in relatively damp ground conditions but we cannot stress too strongly that adequate earthing is critical to the effective operation of electric fencing systems. When the ground is dry, earth (ground) stakes are essential, sometimes as frequently as every 100 metres.
In addition to the effectiveness of a fencing system, there is also the issue of efficiency. This means how well the energy that is stored in the batteries, or drawn from the mains, is utilised with maximum efficiency. Hotline energisers have been designed with these criteria very much in mind.
The power of Hotline fencers is measured in Output Joules, which is the energy available to the fence to power its fence lines. Sometimes Stored Joules is mentioned, which is the energy held internally. However, when stored energy is released to the fence, it decreases by up to 50%, depending on conditions, so we tend not to use this figure, which can be misleading.
The legal maximum of Output Joules is limited to 5 Joules under a 500-Ohm load.
All electric fencing systems are required to comply with the relevant standards, in Europe: European/British Standards BSEN 61011 220V/110V, BSEN 61011-2 Battery, BS 60335-2-76 and relevant EMC Standards; United States, UL 69.
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