RELIEF

Two-wire Detector "RELIEF"

Purpose
The protective local two-wire detector “RELIEF” is intended to protect perimeters of different sites.



General Information

• The detector principle of operation is to generate a volumetric detection zone of “peak” or “surface” types between two insulated wires fixed parallel to each other on dielectric consoles. The wires form the so-called “open antenna” or the local part (LP) of the detector. A transmitter is connected to its one end, a receiver is connected to the other end. The variation of electromagnetic wave parameters spreading from the transmitter to the receiver causes an alarm when a detection zone is crossed by the intruder. Consolles are located at an interval of 4 ... 6 m along the perimeter of a protected site and mounted on fences, posts, trees, walls of buildings and etc.
• The detector provides continuous, round-the-clock operation and keeps its characteristics at a temperature of –40…+50°C and humidity of 98% at a temperature of +35°C.
• The detector keeps operating and it is immune to:
  • rain, fog and snow;
  • solar radiation;
  • the wind at a speed up to 30 m/sec.;
  • the circulation of small animals (rats, cats);
  • the landing of birds on LP wire (e.g. crows);
  • the circulation of transport at a distance of 2 m minimum from the local part wires;
  • EMI according to GOST R 50009-92.

Distinctive Features

• Intelligent detector of a new generation.
• Signal processing allows:
  • to use self-training mode (setup mode without control devices);
  • to carry out automatic operation self-diagnosis and indication of short circuit, breakage, incorrectly chosen length of a local part without additional contol means;
  • to design modification with RS-485 interface. It allows to connect the detector to a computerized security board over 2-wire communcation line and to enlarge its functional capabilities (operation control of the detector from the acquisition system, the possibility to acquire information about the detector status, etc.);
  • to increase noise immunity, to protect against adverse weather conditions, circulation of small animals, landing of birds on the local part wires.
• The detection zone follows the configuration and relief of a protective boundary that results in the effective use of the detector on an uneven terrain.
• Operation under conditions of strong electromagnetic fields.
• The detector can operate on different fences; it can also operate on barbed wire fences.
• No customary operating controls (toggle switches, crossbars, sensitivity controllers).
• New design of electronic units made in the form of local part consoles which results in the minimal installation work.
• The detector sensing element doesn’t require special insulator-adapter connectors while installation.
• High repairability of the detector local part.
• Remote control of operation.
• Special training of the staff is not required to conduct mounting, starting-up, adjustment and run of the detector.
• Protection against re-polarization.

Specifications

• Detection zone length is:
  • 25...250 m in case of “visor” installation;
  • 25...200 m in case of “near-surface” installation.
• The distance between the wires is 0,5 ... 1,8 m.
• The detector generates alarms when:
  • intruder crosses a detection zone ata speed of 0,3...10 m/sec.;
  • there is remote control of operation;
  • there is simultaneous failure of supply-line voltage and power backup voltage;
  • any of local part wires is broken;
  • there is short circuit of local part wires between each other.
• Minimal probability of detection is 0,98.
• Supply voltage is 10…30 V.
• Maximum consumption current is 0,045 A.
• Maximum time of availability for operation is 60 sec. after power supply is ON.
• Maximum time of availability for operation is 10 sec. after an alarm is generated.
• Maximum time of availability for operation is 10 sec. after an alarm is generated.

Operating Characteristics

• Mounting:
  • local part (to form a detection zone of ““near-surface” type, variant 1) - dielectric consoles are mountedd on the ground, then the upper wire is fixed to them and the lower wire is placed on the ground (buried);
  • local part (to form a detection zone of “visor” type, variant 2) – brackets are fixed with screws from a delivery kit or by “zeroing in” to the fence (walls, posts) with an interval 4 ... 6 m; then dielectric consoles are mounted on them with a required incline and then the wire Ï-274…Ï-279 type is fixed to the consoles;
  • electronic units – brackets are fixed to the surface with screws from a delivery kit or by “zeroing in” with the subsequent mounting of the units.
• Wiring: labeled wires of the detector plait are switched to the contacts of a junction box according to the wiring layout.
• Setting: check passes in the mode of “TRAINING”.
• Performance check: check passes in a detection zone or remote one.

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