Everything you need to know about Energizers for Electric Fences
What is an energizer and how does it work?
An energizer for an electric fence (security or animal management) is used to convert battery or mains power into electrical current pulses which are sent down the fence. The energizer sends out pulses instead of a continuous current to eliminate the risk of dangerous shocks that could be received and allows the animal or person to step away/let go of the electric fence. Nemtek security energizers have the functionality to monitor the fence wires and can alert you, in the form of an alarm, if anything changes in the condition of the electric fence.
The fence circuit remains closed and the pulses flow through the fence until one of two events happen: there is an open circuit or a short circuit. An open circuit happens when a live wire is cut and the current is disrupted which sends the energizer into alarm. A short circuit can occur when either a person or animal touches a live wire and completes the circuit by the current flowing through them into the ground and earth spike, or when an earth and live wire touch when someone is trying to climb over the fence. This will also send the energizer into alarm. Without an energizer, an electric fence is just a couple of wires or a passive barrier.
Things to consider when selecting an energizer:
- Which industry are you addressing?
This will determine what type of energizer you will use. For example, a residential fence may require one zone of 150m whereas a high-security fence may require multiple smaller zones for patrolling.
- How many zones do you require?
This depends on the length of the fence and the zone lengths required.
- How the information is displayed.
- On the energizer LED
- On the energizer LCD
- On a keypad
- On a touchpad display, generally used with multi-zone systems
- On a PC in a control room, large systems
- Joule rating of the energizer
The higher the joule rating, the higher the energy that an energizer can deliver into a load.
The Nemtek difference 
Nemtek designs, manufactures and distributes a complete range of innovative and intelligent electronic perimeter control systems that are easy to install and use. We supply both the security and animal management industries with high-quality products, which have been thoroughly tested in a competitive market. We are so confident in our range that they come with a two-year warranty.
Using the Adaptive Power Technology (APT) pioneered by Nemtek, our energizers are capable of detecting how much power a fence can accept and handle before it starts to arc and waste energy. This maximises the power on the fence and minimises false alarms.
We specialise in the research, development and manufacture of electric fence energizers and related products. This includes medium- to high-powered units. Full SABS and IEC reports are available on request.
Browse the Nemtek security energizer range here and the animal management range here.