manual for the installation of safety loops – urbaco manuals/safety loops, detectors/nt... ·...

Pictures are not contractual NT-BCL(V2-EN) – V2 – 04/06

MANUAL FOR THE INSTALLATION OF SAFETY LOOPS – URBACO

THIS MANUAL IS INTENDED FOR TECHNICAL STAFF IN CHARGE OF INSTALLATION, OPERATION AND MAINTENANCE OF THESE PRODUCTS.

URBACO S.A.

Engineering Division - URBACO - 2 -

SOMMAIRE

1. PRESENTATION .................................................................................................................... 3

2. SAFETY LOOPS .................................................................................................................... 4 2.1. Presentation of equipment ............................................................................................. 4 2.2. Electrical specifications of loops .................................................................................... 6 2.3. Geometrical specifications of loops ................................................................................ 6 2.4. Rules for the laying of loops ........................................................................................... 6 2.5. Operational logic mode on site (loop in both sides of the bollard) ................................. 8

C1. Controlled entrance or exit ...................................................................................... 8 C2. Free exit .................................................................................................................. 8 C3. Controlled entrance and controlled exit ................................................................... 9 C4. Controlled entrance and free exit ............................................................................. 9

2.6. Rules for the laying of loops around the bollard .......................................................... 10 2.7. Operational logic mode (loops around the bollard)....................................................... 11

C1. Controlled entrance or exit .................................................................................... 11 C2. Free exit ................................................................................................................ 12 C3. Controlled entrance and controlled exit.................................................................. 13 C4. Controlled entrance and free exit ........................................................................... 14

3. ROADWORKD FOR LOOPS ............................................................................................... 15 3.1. Dimensions of a Safety loop ........................................................................................ 15 3.2. Specifications for the laying and burying of security loops ............................................ 15

3.2.1. For asphalted road surfaces ............................................................................... 16 3.2.2. Between flagstones / paving stones .................................................................... 16 3.2.3. For concrete slabs .............................................................................................. 16 3.2.4. Underneath slabs or paving stones .................................................................... 16

3.3. Top view before filling up.............................................................................................. 17 3.4. Testing before and after filling up ................................................................................. 17 3.5. Finishing ...................................................................................................................... 17

4. TABLE OF ARTICLE CODES ............................................................................................. 19

Manual for the Installation of Security Loops - URBACO

Engineering Division – URBACO - 3 -

1. PRESENTATION

A controlled access generally consists of automatic retractable bollards, safety loops and a control system. Safety loops are intended for the magnetic detection of vehicles. They are buried underground on both sides of the bollards (standard site configuration) or around the bollards (specific cases). They inform of the presence or absence of a vehicle near the bollards; they are the main component of the safety system. Depending on site logic configuration selected, 2 or 3 loops will be laid according to precise specifications to be respected for the optimal operationality of the safety system. Indeed, the positioning of loops will govern the access correct operationality. Therefore the determination of the exact location of loops should be considered a priority; and then, where the bollards and the control system are to be installed.

URBACO S.A.


2. SAFETY LOOPS 2.1. Presentation of equipment: The loop is made of a supple 3-conductor multipair electrical cable. The 3 conductors are cabled so as to form 3 twists. This cable is inserted in a ICT-type ringed conduit to ensure mechanical and thermal protection during road surfacing after laying. The loop acts as a captor combined with a signal processing device (called ‘detector’) to form the contactless detection system for metallic objects. The detector(s) is (are) placed in the control system. The loop feeder links the loop to the detector. It consists of a 2 x 1.5 mm² multipair twisted shielded cable (10 twists minimum per metre all the way to the detector). This specification is a must. This cable should be inserted inside a ringed conduit (not supplied). The use of a shielded (STP) cable (NOT EARTHED) is obligatory in case several loop feeders are laid in the same slot or in a unstable environment (high voltage lines, etc) The loop feeders must be as short as possible (length between safety loop and detector: 50 m / 164 ft max.), with a cable whose inductiveness per metre is relatively low (about 0.73 µH). They must not be laid anywhere near conductors which may cause parasites (such as power cables for instance). Note: standard loops are delivered with a loop feeder of 25 m / 82 ft or 50 m / 164 ft. The loop feeder can be shortened from its loose end. In case the loop feeder needs to be lengthened, then use the same type of cable. Cables will have to be welded and electrical continuity of shield ensured; welding will be protected inside waterproof boxes filled with resin. In all cases, the total length of the loop feeder shall not exceed 50 m / 164 ft. When the distance between the loop and the control cabinet is over 50 m / 164 ft, it is advisable to place the detectors inside a secondary case nearby. (See diagram below). Loops made by URBACO are perfectly compatible with single or dual-channel detectors supplied by URBACO. However, URBACO does not guaranty the compatibility of their loops with other types of detectors; Likewise, URBACO does not guaranty the compatibility of their detectors with other types of loops.

Loop: available in perimeters of 6 m / 19 ft, 8 m / 26 ft , 10 m / 33 ft and 12 m / 39 ft as a standard

Loop feeder: Standard length: 25 m / 82 ft or 50 m / 164 ft, Ø 7 mm / 0.27’

Connection box: Ø 70 mm / 2.76’, H 41 mm, / 1.61’, hermetically sealed with resin to protect the weldings

End of loop feeder: 2 conductors to connect directly to detector bearing. Preserve twists.



Technical Centre

Conduit Ø 120 mm / 4.72 ‘

link between detectors and bollards Distance

MTC / manhole below 150 m

/ 492 ft Distance

loop / detector below 50 m /

164 ft

Bollard

Bollard

Remote cabinet for

loop detectors

Manhole 500 x 500 x 500

19.6 x 19.6 x 19.6 with draining of

rainwater

1.30 m 4.27 ft

Conduit Ø 100 mm / 4 in

linking bollard / MTC

Standard loop

Standard Loop

Conduit Ø 40 mm / 1.57’

from loop to manhole

(for loop feeder)

1.30 m 4.27 ft

1.30 m 4.27 ft

ADDITIONAL INSTALLATION

when distance between loops and control cabinet is over 50 m / 164 ft.

URBACO S.A.


2.2. Electrical specifications of loops: Inductance: ideal inductive range to detector must be between 50 and 250µH. Resistance: resistance of loops must be below 10Ω. Insulation: insulation with earth / ground must be at least 10MΩ. 2.3. Geometrical specifications of loops:

Authorised loop forms Non-authorised loop forms

CAUTION! Loop forms with reflex angles are not authorised.

CAUTION! If the loop is to be installed around one or two bollards, only rounded, square or similar geometrical forms are tolerated.

Loops of different dimensions can be used provided their perimeters are between 6 m // 19 ft (a rectangle 2 x 1 m // 6.56 x 3.28 ft for instance) and 14 m // 46 ft). All are made of 3 turns. We remind you that standard URBACO loops are 6 m // 19 ft, 8 m // 26 ft, 10 m // 33 ft, 12 m // 39 ft , 14 m // 46 ft and 16 m // 52.5 ft long. 2.4. Rules for the laying of loops: R1 Minimum distance between side cables of two loops: 600 mm // 23 in.

R2 Minimum ground distance between the cable of a loop and the centre of a retractable bollard located out of the loop: 800 mm // 31.5 in and 1000 mm // 39.4 in.

R3 Minimum ground distance between the cable of a loop and a permanent fixed metallic element located out of the loop: 300 mm // 11.81 in for a manhole cover, 100 mm // 3.93 in for a post or a barrier.

R4 Circling a metallic element with the loop should be avoided, and must be left out if it is mobile (a bollard for instance). If it is not possible to abide by the rule (with stationary elements like a manhole cover), position the object in the centre as best you can. In any case, leave at least 300 mm // 12 in between the loop cable and the outer edge of the metallic object. Make sure the object does not cause any disturbance, even by thundery weather.

R5 The slot cut for a loop must not contain anything else but the loop and be situated at least 100 mm // 4 in. from any other slot (dug for instance to lay other loop feeders or conductors). Loop feeders must not be positioned across the loop.

R6 Several loop feeders can be laid in the same slot, including near metallic elements. However, this slot cannot receive any other conductor likely to generate parasites (power cables).



R7 Make sure no electrical line is running under the site envisaged for the loops.

- If a low or medium voltage line (from 230 VAC to 5000 VAC) runs nearby, it should be at least 2 m // 6.56 ft away from the loops. - If a high voltage line (over 5000 VAC) runs nearby, distance with the loops must imperatively be over 10 m // 33 ft.

R8 Twist the loop feeders all the way to the connection rack of the loop control box (at least 10 twists per metre / 3 twists per foot).

R9 Try as much as feasible to avoid laying the loop on a traffic roadway other than that of the access site considered (for instance, on crossroads). Vehicles driving by could interact with bollards and trouble the whole system safety.

Illustration for Rules R1 to R8

EU: Sewerage manhole – RE: Inspection/Maintenance hole – HT: High voltage line – C3: Controller – C1: Slave controller – BT: Power 230V 16A 1-phase + Earth/ground – B1: Presence loop / Safety loop N°1 – B2: Safety loop N°2 – B3: free exit loop

Illustration for Rule R9 CORRECT WRONG

Loops Roadway

Bollards Bollards

Loops Roadway

URBACO S.A.


2.5. Operational Logic Mode (loop on either side of the bollard):

C1. Controlled entrance or exit (one-way traffic) 2 loops, 2 bollards operated simultaneously, 1 lane.

One loop on each side of the bollards; The loop on the entrance side is used as presence loop for the vehicle driving over and validates the request for access opening via beeper, contactless card, etc. Both loops are used as safety loops for the vehicle detected and the access remains open, bollard remains down, as long as both loops are not cleared. This one-way controlled access is either a « controlled entrance » or a « controlled exit ».

C2. Free exit (one-way traffic): 3 loops, 2 bollards operated simultaneously, 1 lane.

Two loops before the bollards, one loop after. Once the first loop (B3) is activated on the way out, as well as the one just after, the access automatically opens. The two safety loops (B2 and B1) operate as safety loops and the access remains open, bollard down, as long as these two loops are not cleared).



C3. Controlled entrance and controlled exit (two-way traffic): 2 loops, 2 bollards operated simultaneously, 1 lane.

One loop on each side of the bollards: each one is used as presence loop for the vehicle driving over and allows acceptance of opening command via remote control, contactless card, etc. Both loops are used as safety loops for the vehicle, whichever way the vehicle is going, and the access remains open, bollard down, as long as both loops are activated.

C4. Controlled entrance and free exit (two-way traffic): 3 loops, 2 bollards operated simultaneously, 1 lane.

One loop (B1) on entrance side, two loops (B3 and B2) on free exit side: once the first loop (B3) is cleared on the way out and the one just after simultaneously, the access opens automatically. The two safety loops are used as safety loop for the vehicle, whichever way it is going, and the access site remains open, bollard down, as long as both loops are activated. The loop on the entrance side is also used as a presence loop for the vehicle driving over and allows acceptance of opening command via remote control, contactless card, etc.

URBACO S.A.


2.6. Rules for the laying of loops around the bollard: R1 Minimum distance between side cables of two loops: 600 mm // 24 in.

R2 Minimum ground distance between the cable of one loop and the centre of a retractable bollard located inside the loop: 1000 mm / 40 in.

R3 Minimum ground distance between the cable of a loop and a fixed metallic element outside the loop: 300 mm // for a sewerage manhole, 100 mm // 4 in. for a post or a barrier.

R4 Circling a metallic object with the loop should be avoided. If it is not possible to abide by the rule with stationery elements such as a manhole cover, then position the object in the centre as best you can. In any case, leave at least 300 mm // 12 in between the loop cable and the outer edge of the metallic object. Make sure the object does not cause any disturbance, even by thundery weather.

R5 The slot dug for a loop must not contain anything else but the loop and be situated at least 100 mm // 4 in from any other slot (cut for instance to lay other loop feeders or conductors).

R6 Several loop feeders can be laid in the same slot, including near metallic objects. However, this slot cannot receive any other conductor likely to generate parasites (power cables).

R7 Make sure no electrical line is running under the site envisaged for the loops. - If a low or medium voltage line (from 230 VAC to 5000 VAC) runs nearby, it should be at least 2 m // 6.56 ft away from the loops. - If a high voltage line (over 5000 VAC) runs nearby, distance with the loops must imperatively be longer than 10 m // 33 ft.

R8 Twist the loop feeders all the way to the connection rack of the loop control system (at least 10 twists per metre / 3 twists per foot).

R9 Try as much as feasible to avoid laying the loop on a traffic roadway other that that of the concerned access site (for instance, on crossroads). Vehicles driving by could interact with bollards and trouble the whole system safety.

Illustration for Rules R1 to R8

EU: Sewerage manhole – RE: Inspection/Maintenance hole – HT: High voltage line – C3: Controller – C1: Slave controller – BT: Power 230V 16A 1-phase + Earth/ground – B1: Presence loop / Safety loop – B2: Free exit loop



2.7. Operation logic mode (loops around the bollard): Hereunder are a few sample configurations of a loop around the bollard:

C1. Controlled entrance or exit (one-way traffic): 1 loop, 2 bollards operated simultaneously, 1 lane.

One loop around the bollards: it is used as presence loop for the vehicle driving over and validates the opening of access by command from remote control, contactless card, etc, but also as a safety device for the vehicle detected. The access remains open, bollard down, as long as the loop is activated. This one-way controlled access is either a « controlled entrance » or a « controlled exit ».

URBACO S.A.


C2. Free exit (one-way traffic): 2 loops, 1 bollard, 1 lane:

2 loops, 2 bollards operated simultaneously, 1 lane:

One loop before the bollards, one loop around: once the first loop on the way through is clear and the one just after simultaneously, the bollard opens automatically. The loop around the bollards is used as a safety loop for the vehicle; the access remains open, bollard down, as long as this loop is activated.



C3. Controlled entrance and controlled exit (two-way traffic): 1 loop, 1 bollard, 1 lane:

1 loop, 2 bollards operated simultaneously, 1 lane:

One loop around the bollard is used as a presence loop; it validates the opening command from remote control, contactless card, etc, but also acts as a safety loop for the vehicle, whichever way it is going; the access remains open, bollard down as long as the loop is not cleared.

URBACO S.A.


C4. Controlled entrance and free exit (two-way traffic): 2 loops, 1 bollard, 1 lane:

2 loops, 2 bollards operated simultaneously, 1 lane:

One loop around the bollard, one loop on free exit side of the access: once the first loop is cleared on the way out, plus the one just after, the access opens automatically. The loop around the bollard is used as a safety and presence loop, whichever way it is going; the access remains open, bollard down, as long as this loop is activated. It also validates the opening command by remote control, contactless card, etc.



3. ROADWORKS FOR LOOPS

3.1. Dimensions of a safety loop: The width of a loop must be adapted to the width of the vehicles for detection. A maximum sensitiveness will be achieved if the loop is smaller than the surface of the vehicle to be detected.

Both installations following are feasible but not recommended (loop too narrow or perpendicular to traffic flow). In both cases, we will not be held responsible for any malfunction or wrong detection occurring.

3.2. Specifications for the laying and burying of safety loops: Once the geometrical shape of loops has been determined, cut a slot in the asphalted, concrete or paved (using miter saw) surface. The slot will be about 25 mm // 1 in. wide by 100 mm // 4 in. deep. The bottom of the slot is then covered with a sand layer 20 mm // 0.78 in. thick. The loop cable must be laid as deep as possible in the slot (always between 50 mm // 2 in. and 150 mm // 6 in. deep below finished grade surface) and as stiffly as possible. The cable is covered with another sand layer 20 mm // 0.78 in. thick. A protective nylon cordon may be laid if necessary (rubber EPDM). Then, resurfacing roadway is done with a finish touch (mortar, epoxy resin, bitumen 120° …) Loop feeders are laid in slots more than 50 mm // 2 in. deep (no maximum depth limit, several loop feeder cables may be laid in the same slot. See Rule R6 on page 7). They are then covered with a sand layer to ensure mechanical and thermal protection during roadway resurfacing. Each loop feeder cable is preferably sheathed inside a protective ICT-type conduit.

Detection loops

Vehicle

Detection loops

Vehicle

CORRECT

WRONG

Minimum width: 1 m // 39.37 in

URBACO S.A.


3.2.1. With asphalted surfaces (section view): 3.2.2. In between paving stones (section view): In this precise situation, detection cables (geotextile) can be sheathed inside a protective conduit. 3.2.3. Inside a concrete slab (section view): 3.2.4. Underneath slabs, paving or cobblestones (section view): The corresponding loops must be laid in the sand between the gravel layer and the paving or cobblestones of the roadway.

Asphalt 120°C/ 248)f

100 mm

Loop cable

Nylon cord EPDM (optional)

Slot 25 mm / 1 in

Nylon cord EPDM (optional) Loop cable

Fine sand

Epoxy resin with mortar

Paving stones

Epoxy resin with mortar

100 mm / 4 in.

Loop cable

Nylon chord EPDM (optional)

50 mm / 2 in.

Pavement, cobblestones

Fine sand

Gravel / Unfinished grade

100 mm / 4 in.

Depth: 70 cm / 27.56 inches

Loop Wedge

100 mm

Finished grade

Finished grade

Slot 25 mm / 1 in

Slot 25 mm / 1 in

Finished grade

Finished grade

Fine sand

Fine sand



3.3. Bottom view before filling:

So as to optimise the installation of the various loops, it is advisable to put wedges on four corners or a frame. The loop will then be laid in the middle of the frame on the sand and fixed with adhesive tape. As a precaution, we recommend that a loop be tested before and after filling the slot up (and check for resistance, insulation default, impedance). 3.4. Tests before filling slot up: To be done using a Q-meter, the instrument measuring impedance. Whatever the type of URBACO loop used, electrical specifications as described in § 2.2 page 6 must be respected. Reminder: Inductance: ideal inductive range to detector must be between 50 and 250µH. Resistance: resistance submitted to detector must be below 10Ω. Insulation: insulation with earth / ground must be at least 10MΩ. 3.5. Finishing: Once this testing phase is over, fill in the slot with tar, mortar or any epoxy-type resin. During pouring, make sure the temperature of material used does not melt the insulating material protecting the loop feeder. This would result in a default with earth insulation. Tests as seen above (§ 3.4) must be done again. The installation is now over. You may now proceed with connections to control box, according to instructions given in the corresponding manual.

Safety loops, (with wedges under slabs or pavement, See 3.2.4)

Slot 25 mm

Slot 12 mm / 0.47 in

Connection box Ø 70 / 41 mm (2.76 / 1.61 in), to be embedded

Loop feeder Ø 7 mm / 0.27 in to control system (or remote case for detectors if distance > 50 m 164 ft)

URBACO S.A.


4. TABLE OF ARTICLE CODES

ARTICLE CODE

PERIMETER (m / ft)

LOOP FEEDER (m / ft)

COBCL0625 6 / 19.6 25 / 82

COBCL0650 6 / 19.6 50 / 164

COBCL0825 8 / 26.2 25 / 82

COBCL0850 8 / 26.2 50 / 164

COBCL1025 10 / 33 25 / 82

COBCL1050 10 / 33 50 / 164

COBCL1225 12 / 39.3 25 / 82

COBCL1250 12 / 39.3 50 / 164

COBCL1425 14 / 46 25 / 82

COBCL1450 14 / 46 50 / 164

COBCL1625 16 / 52.5 25 / 82

COBCL1650 16 / 52.5 50 / 164

URBACO S.A.


Type: See Table (§ 4) First released: 2006

URBACO S.A. - Z.A. du Couquiou 84320 ENTRAIGUES – FRANCE International calls: +33 490 480 800 Fax: +33 490 480 088

E-mail: [email protected]

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