The element cable is a specialized sensitive cable designed for use with the SEL-TERRA underground triboelectric protection system. Installed beneath the ground surface, the cable detects mechanical impact and vibration caused by an intruder moving within the protected zone and generates electrical signals that are processed by the SEL TERRA processor.
– Length of the sensitive element in a single zone up to 500 m;
– Length of the non-sensitive element (NONSE) in a single zone up to 500 m;
– Inputs – 2 or 4 independent zones;
– Relay outputs – 2 or 4 independent outputs;
– Relay output – integrity control of sensitive and non-sensitive element;
– Relay output – unauthorized opening of the processor case.
– All relay outputs – dry contact of outbound relay;
– Power supply 10-30 V (DC);
– When voltage drops below 9.5 V, the protection system goes into the Alarm mode; Current consumption < 25 mA;
– Operating temperature from -40°C to +50°C;
– The duration of alarm signal is at least 1 s;
– Fixed resistance value, control of integrity of sensitive and non-sensitive elements;
INSTALLATION IN GROUND – sensitive element is laid in the depth from 2 cm to 15 cm;
non-sensitive cable is laid in a plastic or metal pipe (laying depth is not regulated). Compatible with all security central lines;
System setting methods:
Using RS-485/USB converter, wired connection (Windows software);
Using wireless connection (IOS/Android device).
PURPOSE
The sensitive element installed underground is designed for electrical signal generation when an offender mechanically or vibrationally affects the ground above the sensitive element at a distance of 2–15 cm from it.
The length of sensitive element protection depends on the length and width of the protected zone. The sensitive element can be laid in any ground, including sand, clay, stone, etc.
GENERAL INFORMATION
The system is used in objects characterized by an irregular shape of the perimeter, the absence of a fence or an increased requirement for the placement of a hidden protected zone.
The system can have up to four protection zones. In each zone, a sensitive element is laid on the ground. The processor registers electric discharges generated by the sensitive element that detects an attempt to break into the territory. The processor activates an alarm if the number of received electric discharges exceeds the norm.
RECOMMENDATION OF INSTALLATION
The number of sensetive element lines per single input depends on the set requirements for the protection zone.
2 lines (in one input) 4 lines of (in one input) 3 lines of (in one input)
LAYOUT OF SENSITIVE ELEMENT RECOMMENDATIONS
1. Before starting the installation, it is necessary to mark the area where the sensitive cable will be laid. Please note that one line of sensitive cable protects from 20 cm to 30 cm of the ground’s surface along the entire length of the line, so the number of lines must correspond to the task.
2. If the ground is soft (humus, sand, etc.), it is necessary to “remove” the ground with a shovel and gradually lay the cable at a depth of 2-15 cm. After laying, the cable must be tamped down into the ground.
3. If the ground is gravelly, in order to lay the cable it is necessary to to dig a trench with a depth of 2-15 cm and a minimum width.
After laying, fill it with already excavated soil and tamp down.
Before laying the sensitive element, the following steps shall be done:
– proceed according to the project documents;
– make sure that the ambient temperature is not less than minus 10 ºС;
– make sure that its turning radius is not less than 120 mm;
– the parts of the sensitive element must be connected using a connection sleeve only.
– For more convenient installation of the sensitive cable, in some places (for example, in turns) the sensitive cable can be fixed to the ground (with a weight or a clip).
