SFE2000

An electrified security fence system provides a cost-effective solution for detecting intrusions into a secured area. With the early detection of intruders, secondary measures can be put into action to identify and apprehend intruders.

This system can be applied for international border fence security, game reserve/farm perimeter fencing, high security areas like sensitive installations, airports, power stations, prisons, industrial sites, radio antennas, TV masts and towers.

The SFE2000 is an advanced energizer that can be used in security fence systems, designed with the latest technology and offers you high performance, reliability and value for money.

Description

The SFE2000 is a self-contained electronic unit used to perform fault detection on high-tension detection loops in an electrified fence environment. The SFE2000 is housed in a metal enclosure and has a free air operating temperature of 0°C to +50°C. It operates from 230 V AC.

Configuration

The SFE2000 can be connected to any single wire fence of up to 40 km and displays actual distance in meters (accuracy ±30m) of ground fault or the fence can be divided into zones and displayed as such. The high-tension detection operates on electrified loops strung for the length of the electrified zone. Typically the electrified loop has from 2 to 12 wires and the electrified zone typical for a four-wire loop is 10 km long. The 40 km can be divided by 2 to 12 wires to determine the zone length. The SFE 2000 can function as a stand–alone unit or with a PC to graphically display the information .

Fence Connection

The SFE2000 connects to the electrified loop by means of two high voltage cables. These cables are connected to the fence via a lightning protection unit.

Detection

The SFE2000 comprises an intelligent controller to monitor line and return HT voltages connected to the SFE2000. The SFE2000 detects ground alarms and open circuit alarms that occur in the connected electrified zone. Zone detection is performed on the electrified loop when a ground fault is applied to the loop.

Principle of operation

In principle, a high-tension pulse (typical 8.0 kV) is applied to the Feeder wire of each zone. The difference between the voltage on the feeder line and voltage on the return line is then used to determine the type of error. If a conductor in the electrified zone is cut by mechanical means or shorted electrically to the razor coil (which is at ground potential) at any point in the electrified zone, an intrusion or fault can be detected. A master slave operation allows for the synchronization of more than one SFE2000 on the same fence section.

Zoning

Zoning operations are performed automatically by the SFE2000. Zoning results are transmitted over the RS 232/485 port for use by an external controller (e.g. a personal computer). The zoning distances to the faults on the fence are calculated and displayed on the SFE display. These alarms will be displayed until the faults have been rectified.

Parameters

Set-up parameters for the SFE2000 can either be set manually from the keypad on the front panel or by an external controller via the RS 232/485 port.

Specifications

The HT pulse applied to the electrified fence conforms to the specifications listed in the IEC: Electric Fence Energizers, Safety requirements for mains-operated electric fence energizers. IEC 1011:High Voltage Energizers: 1993. These specifications are: