Electric Fencing
Introduction
An electrified fence, electric fence or electric fence (also electric fence or electric bogey[1] in the Argentine countryside "Campo (agriculture)"), works on the principle of electrical discharges of impulses of several thousand volts, of a duration generally lower than 1 ms and a repetition frequency of 1-2 Hz. The peak intensity of the impulse reaches about 10 amperes but the effective intensity calculated in the repetition period remains below 10 mA. The amount of energy that is driven in each operating cycle is approximately between 1 and 15 J "Joule (unit)".
The feeder supplies the electrical pulses to the fence at a suitable rate (which can sometimes be varied). The power can be from the mains, a cell or a battery. There are mixed feeding devices. Some devices run on batteries charged by a solar light generator or a wind generator.
Models connected to the electrical grid have a relatively low power absorption, generally in the range of 5-15 W, meaning they cause a monthly energy consumption of 3-11 kWh.
Principle
The current flows through a wire cable without an insulating sheath, but isolated from ground (electrical ground of the system) through electrically insulated posts. The slightest contact of an animal with the wire allows the electrical current to discharge to the ground through the animal's body, causing an electrical shock that forces it to separate from the fence.
Animals recognize these devices and continue to distrust them even if they are turned off (especially if the ground was wet when they received the first shock). In this way they will be educated for a long time, (since it is difficult for them to forget) they will remember, for example, even after having spent a winter in the stable.
Uses
Electric fences are used to:.
Risks and dangers
Electric fences are obviously no danger to humans or animals because the energy supplied during the discharge does not exceed a few tens of joules. By comparison, a defibrillator delivers shocks of several hundred joules. An international (IEC 60335-2-76) or European (EN 60335-2-76) safety standard defines the limiting characteristics of the output pulses of high voltage generators.