Tiso Optimus RB392 Series, Руководство по эксплуатации и обслуживанию электрического оборудования, Страница: 18 / 26

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3.3. Protective induction loops
The Boom Barrier control unit may include additional option
–
protective induction loops .
One or two induction loops are installed in roadbed next to the Boom Barriers, are connected to
control unit and are used to prevent the Boom Barrier raising when a vehicle is on induction loop.
Fig.10 - Example of induction loop layout next to the road blocker
If Boom Barrier has induction loop option, then control unit contains one or two controllers of induction
loops B3-A4. Safety Loop Detector A EMX ULTRADIN * and B3-A4. Safety Loop Detector A EMX
ULTRADIN * .
The scope may also include some cables SIF1.0 for preparation of induction loops.
The maximum allowable distance from induction loop to control unit is 20 m .
Induction loop responds to vehicle metal and at its location there should not be metal in road
surface. Minimum distance from induction loop to metal parts is 500 mm .
A trench of 50-70 mm depth and 15-25 mm width according to induction loop size is made for
installation of induction loop in road surface. A trench is also made from the edge of induction loop to
control unit.
Induction loop is 3-4 turns of cable SIF1.0 to be installed in trench the ends of which are twisted
between them and connected to induction loop controller of control unit. Cable SIF1.0 can be laid in
plastic corrugated tube or plastic pipe. After induction loop is laid in pipe it is filled with sand and covered with
cement or asphalt grout.