JVA security electric fence energizers include integrated fence voltage monitors. For more sophisticated monitoring, JVA’s range of electric fence monitors each provides unique features for sites with special security requirements.

The single zone ZM1 can be used with any electric fence energizer to provide power control and monitoring. These monitors use a patented method to detect a short over 10km away from the energizer. Able to convert an existing electric fence into a monitored fence, they can monitor from the start of the fence without requiring a return wire from the end of the fence. These may also be configured to monitor the return voltage from the end of the fence.

The ZM20 is a loop monitor. It operates by detecting a change in the balance of power sent around a perimeter fence where the live wires are configured in a continuous loop. If the balance is affected by a short circuit the ZM20’s advanced circuitry can determine the position of a short to a precision of 1m over 10km of live wire. The obvious attraction of the ZM20 is that it can be used to report up to 20 sectors from one location. It was primarily designed to allow Greenfield development sites to be sealed even before services have been provided around the perimeter.

The ZLM4 is a 4 channel security electric fence controller. It offers detection but no shock deterrent. It is used to power a security electric fence with ELV (Extra Low Voltage) where high voltage is not appropriate. It may also be used to increase the security level on a high voltage electric fence by applying monitoring to the ground wire grid on a fence that is also powered from another high voltage energizer on its live wires. The ZLM4 can detect a short to ground, cut, cross couple or short to a high voltage wire