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L

OOP

D

ETECTOR

H

ANDBOOK

667/HE/20663/000

Issue 13

Page 9

2.2.7

Feeders

Sharing of a multi-pair feeder cable between different detectors is not
recommended. See section 2.7 for feeder types.

2.3

Loop Configurations

Loop positions will be marked prior to slot cutting, as per the positioning
instructions shown on the STS.

Loop configurations are normally of the following types:

Chevrons -

Vehicle actuation, SDE/SA

Diamonds -

Vehicle actuation (use for replacement or MOVA

only)

Rectangle -

Turning loops, SCOOT, COUNT, QUEUE and
special purpose (Required for SDE/SA for previous
detector types).

Special loops -

MOVA loops (diamonds are recommended)

2.3.1

Replacement Controllers

Replacement controllers should continue to use existing diamond Vehicle
Actuation loops where they are in good condition. Any existing SDE/SA loops
for replacement controllers should be re-cut to the new 3.6 m standard prior to
commissioning.

2.3.2

Replacement VA Loops

If a diamond loop needs re-cutting it should be re-cut as a diamond. However
if all the loops on an approach are to be re-cut then the chevron loop
configuration should be used. It is permitted to have all chevrons on one
approach and all diamonds on another subject to the following clause; where
two or more VA loops are connected to the same detector channel they must
all be to the same configuration, i.e. ALL Diamond or ALL Chevrons.

2.3.3

Replacement SDE/SA Loops

If a 3.05 m spacing SDE/SA loop needs re-cutting it should be re-cut to the
same spacing as the original unless every approach on that controller is re-
cut. In that case the new 3.66 m spacing should be used and the controller set
up or reconfigured accordingly. Controllers cannot accept inputs from loops of
mixed spacing.

2.3.4

Use of Soundmark Test Sets

Care must be taken when selecting the loop pitch on Soundmark Test Sets.
Selecting PLE selects the old Plessey loop pitch of 3.05 m (10 ft). Selecting
GEC selects 3.6 m (12 ft) which is now common for GEC, Microsense and
NEW STC equipment.

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Содержание BH17 7ER

Страница 1: ...D Roy Bowen Dave Martin FUNCTION Senior Group Leader DATE 13 03 2013 ISSUE 13 Siemens plc 2013 All rights reserved The information contained herein is the property of Siemens plc and is supplied without liability for errors or omissions No part may be reproduced or used except as authorised by contract or other written permission The copyright and the foregoing restriction on reproduction and use ...

Страница 2: ...is Handbook and any other Document or Handbook associated with the equipment including but not restricted to the following a The equipment must be correctly connected to the specified incoming power supply b The equipment must be disconnected isolated from the incoming power supply before removing any protective covers or working on any part from which the protective covers have been removed c Any...

Страница 3: ... 3 2 Replacement VA Loops 9 2 3 3 Replacement SDE SA Loops 9 2 3 4 Use of Soundmark Test Sets 9 2 3 5 Procedure for Marking Position of Diamond Loops Prior to Slot Cutting 10 2 3 6 Chevron type loops marking of loops 10 2 3 7 UD Loops SDE SA SCOOT Count and Queue 11 2 3 8 Turning Loops and SDE SA Loops 12 2 3 9 MOVA Loops 12 2 3 10 Special Loops 13 2 4 Loop Slot Details 13 2 5 Loop Turns and Feede...

Страница 4: ...ns 24 Figure 6 Typical SCOOT Loop Leading Dimensions 25 Figure 7 Typical Count Loop Leading Dimensions 25 Figure 8 Rectangular SDE SA Loops 26 Figure 9 Rectangular Turning Loops 26 Figure 10 Chevron SDE SA Loops 27 Figure 11 MOVA Loops One Way Street or Dual Carriageway 28 Figure 12 MOVA Loops Two Way Carriageway 28 Figure 13 Special Purpose Loops 29 Figure 14 Slot Details 30 Figure 15 Maintaining...

Страница 5: ...dbook 667 HB 27663 000 SLD4 Loop Detector Handbook 667 HB 45200 000 Helios Signals and Poles Handbook 667 HB 30000 000 1 3 2 Peek Sarasota Detector Handbooks The handbooks for the Peek Sarasota detectors can be obtained from Peek Ltd Kingsworthy Hampshire SO23 7QA These handbooks contain full details and should be consulted when installing and operating Peek Sarasota detectors 1 3 3 Maintenance Pr...

Страница 6: ...Pages Current Issue Type Part ID All 13 Meridian 667 HE 20663 000 1 5 Glossary UD Uni directional LRT Light Rapid Transport SDE SA Speed Discrimination Equipment Speed Assessment SCOOT Split Cycle Offset Optimisation Technique STS Site to Scale drawing VA Vehicle Actuation ...

Страница 7: ...r of turns in the loop or number of conductors within a slot as follows 998 4 85264 000 4 mm x turns conductors Plus 50 mm where slots are cut in a black 998 4 82021 000 6 5 mm x turns conductors top cover or 25 mm where slots are cut in 998 4 70671 001 6 5 mm x turns conductors concrete Note The number of turns is specified in Section 2 5 2 2 Positioning of Loops and Loop Tails Feeders Loop locat...

Страница 8: ... to observe this can weaken the road surface and may cause subsequent breaking up 2 2 5 Blast Furnace Slag Occasionally road surfaces incorporating blast furnace slag in their construction will be encountered This has a de sensitising effect on detector loops It is not possible to detect the presence of slag from the road surface appearance and it will usually be discovered only during commissioni...

Страница 9: ...issioning 2 3 2 Replacement VA Loops If a diamond loop needs re cutting it should be re cut as a diamond However if all the loops on an approach are to be re cut then the chevron loop configuration should be used It is permitted to have all chevrons on one approach and all diamonds on another subject to the following clause where two or more VA loops are connected to the same detector channel they...

Страница 10: ...stance between the datum point and the end point divided by 2 iii For the triple loop configuration the loop diagonal is the distance between the datum point and the end point divided by 3 iv For the quad loop configuration the loop diagonal is the distance between the datum point and the end point divided by 4 6 Starting at the datum point mark the length of the loop diagonal along the datum line...

Страница 11: ...UD loop overlays the actuating loop by 1 3 of the loop diagonal as shown Diamond UD loops can be used with Plessey ST Microsense detectors and Sarasota units Figure 5 illustrates a three lane chevron loop approach This configuration can be used with Microsense Plessey ST and Sarasota detector units Note In a two lane approach the angle of the UD loops should be reversed to line up with the Y and Z...

Страница 12: ...r turning loops and SDE SA loops The turning loop Figure 9 can be connected to Siemens Plessey Microsense and Sarasota detectors observing the calculation for loop turns listed in section 2 5 of this document The rectangular loop SDE SA configuration Figure 8 is for connection to Siemens Plessey Microsense or Sarasota detector units The chevron loop SDE SA configuration Figure 10 should be used wi...

Страница 13: ... the 50 mm covering for the top cable See Figure 15 The same rule applies to all loops at the point where the feeder cables join the loop The corners of slots should not be cut away at diamond loop crossovers but must be cut away to ease the bend on loop cables turning through an angle of less than 90 See Figure 16 An alternative is to protect the cable from a sharp corner by inserting a short len...

Страница 14: ...S FEEDER V A Chevron Diamond 1 to 3 3 300 m V A Chevron Diamond 4 3 250 m V A Chevron Diamond 5 3 200 m V A Chevron Diamond 6 3 150 m SDE SA Rectangle 1 3 300 m SDE SA Chevron 1 3 300 m COUNT QUEUE Rectangle 1 3 300 m SCOOT Rectangle 1 or 2 3 300 m Note Sarasota MTS 36ZE and MTS 38ZE 667 7 21031 102 and 104 detectors have a built in extension timer and must not be used with Traffic Signals 2 5 3 P...

Страница 15: ...al or controller case they should be taped or tied together at 100 mm spacing The free ends should be labelled with the loop identity using Hellerman HC7 sleeving 2 6 2 Slots Containing Loop Cable Slots must be backfilled immediately following the laying of cables The backfill of loops in the United Kingdom consists of two different techniques i Complete cover of the loop cable with dry sand to a ...

Страница 16: ...r is the melting point in C To order follow the temperature with the pack size e g R85 25 for 85 C melting bitumen in 25 Kg blocks Colas Construction Ltd Western Region Gabriels Wharf Water Lane Exeter Devon EX2 8BZ 2 PLIASTIC 77 or 90 Export Only Expandite Ltd 1 9 Chase Road London NW10 6PS 2 7 Feeder Cables In areas where the customer has no special requirements the following instructions are to...

Страница 17: ...n an appropriate joint box The crimp connectors must be suitable for joining 1 5 mm2 2 5 mm2 solid copper feeder cable conductors to 1 5 mm2 2 5 mm2 stranded loop conductors The feeder cable codes are as follows 1 5 mm2 Plain cable 1 5 mm2 Armoured cable 1 pair 998 4 85263 900 998 4 85263 000 2 pairs 998 4 85263 901 998 4 85263 001 The following 2 5 mm2 cables are no longer recommended but are lis...

Страница 18: ... 8 915 4 03118 001 Use with 3 pr and 4 pr cables maximum loop conductor 12 667 4 15084 000 1 2 or 3 loops to a 1 pair cable 667 4 15084 001 2 or 3 loops to a 1 pair cable 2 loops to a 2 pair cable 667 4 15084 002 2 or 3 loops to a 1 pair cable 3 loops to a 3 pair cable 667 4 15084 003 2 or 3 loops to a 1 pair cable 4 loops to a 4 pair cable The depth of slots for joints must be such that their cov...

Страница 19: ...travel and vary in width The diagram below may be used as a guide to sensitivity settings However the target response for a SCOOT detector is that a detect output should start as the first metal part of a normal 4 wheeled vehicle crosses the front of the loop and no response should be obtained from vehicles in adjacent lanes This should be confirmed or the sensitivity altered to achieve this befor...

Страница 20: ...t or MOVA only See Figure 21 for distance from stop line Figure 2 Table of Dimensions for Diamond Loops Use for replacement or MOVA only Distance between Datum Point and End Point within the range Loop Configuration Example 1 2 3 6 metres 3 7 7 2 metres 7 3 10 8 metres 10 9 14 4 metres Single Double Triple Quad ...

Страница 21: ... 00 1 22 2 83 0 86 4 50 1 37 3 18 0 97 5 00 1 52 3 54 1 08 5 50 1 68 3 89 1 19 6 00 1 83 4 24 1 29 6 50 1 98 4 60 1 40 7 00 2 13 4 95 1 51 7 50 2 29 5 30 1 62 8 00 2 44 5 66 1 72 8 50 2 59 6 01 1 83 9 00 2 74 6 36 1 94 9 50 2 90 6 72 2 05 10 00 3 05 7 07 2 16 10 50 3 20 7 42 2 26 11 00 3 35 7 78 2 37 11 50 3 51 8 18 2 48 12 00 3 66 8 49 2 59 ...

Страница 22: ...Out Chevron Loops bx xx cx xx by aa1 xx xx xx ay1 xx Distance from stop line aa az ay D1 D1 ax 0 3 m D1 1 1 m 1 m 1 m xx xx by1 Distance from stop line bz 0 3 m 1 1 m Direction of traffic See Figure 21 for distance from stop line xx Distance from stop line cy 0 3 m 1 1 m 1 m ...

Страница 23: ... 667 HE 20663 000 Issue 13 Page 23 Figure 4 Typical Loop Configurations with UD Dimensions Diamonds Loop tails Maximum length of feeder cable 150 m obsolescent use for replacement only 1 m 1 3 x 0 3 m to kerb edge 1 m x U D ...

Страница 24: ...HE 20663 000 Issue 13 Page 24 Figure 5 Typical Loop Configurations with UD Dimensions Chevrons 0 3 m 0 2 m U D loop overlaps X loop by 0 2 m 0 3 m in direction of travel 1 m 0 3 m to kerb edge X U D X 1 m subject to local survey ...

Страница 25: ... 6 Typical SCOOT Loop Leading Dimensions 2 5 m NA 0 3 m 1 m 0 15 m U D 2 m Figure 7 Typical Count Loop Leading Dimensions 0 15 m B A 1 m 1 8 m Dimension A 0 27m Dimension B Refer to Figure 23 to Figure 27 Dimensions to be marked up on STS drawing after installation ...

Страница 26: ...el x Road centre 1 2 m 3 6 m 1 m Distance from stop line 0 3 m 1 m 1 8 m x Refer to note in section 2 3 8 for dimensions Note that on dual carriageways the loops should be 0 3 metres from the central reservation Distance from stop line See Figure 22 All loops to be 3 turns Figure 9 Rectangular Turning Loops Length 1 8 m 3 6 m Width 1 8 m 7 6 m Maximum of 150 m feeder cable ...

Страница 27: ...Chevron SDE SA Loops Direction of traffic Armoured feeder cable 1 m Joint Distance from stop line Joint 3 66 m 0 3 m 1 1 m 1m On dual carriageways the loops should be 0 3 metres from the central reservation Distance from stop line See Figure 22 All loops to be 3 turns ...

Страница 28: ...0663 000 Issue 13 Page 28 Figure 11 MOVA Loops One Way Street or Dual Carriageway 0 8 m 0 8 m 0 8 m 0 8 m 0 4 m Lane 1 Lane 2 Lane 3 0 4 m 1 6 m to 1 7 m Figure 12 MOVA Loops Two Way Carriageway 0 6 m 0 8 m 0 8 m 0 4 m 1 6 m to 1 7 m ...

Страница 29: ...gure 13 Special Purpose Loops 1 4 m 15 0 m 1 2 m a Call and Extend loops Non bicycle sensitive Not approved for use on roads in UK 1 4 m 15 0 m 1 2 m b Call and Extend loop Non bicycle sensitive Not approved for use on roads in UK 1 8 m 3 0 m 4 8 m c Queue loop ...

Страница 30: ...ls Road surface Hot pour compound 8 5mm min 50mm covering 25mm in concrete Epoxy material or sand Loop cables Figure 15 Maintaining 50 mm Covering at Crossovers Floor of both slots dipped at crossover Loop cables in crossing slot Note Not to be carried out at diamond crossovers ...

Страница 31: ...ers Figure 17 Slot Corners Protected by Corner Pieces 1mm Vinyl Plastic corner protection pieces SLOT WIDTH 998 4 85264 000 8mm 998 4 82021 000 10mm 998 4 70671 001 SLOT WIDTH to be widened to 998 4 85264 000 10mm 998 4 82021 000 12mm 998 4 70671 001 to accept 2 off corner protection pieces ...

Страница 32: ...LOOP DETECTOR HANDBOOK 667 HE 20663 000 Issue 13 Page 32 Figure 18 Standard Loop Configurations a Diamonds are largely obsolescent use for replacement or MOVA only ...

Страница 33: ...LOOP DETECTOR HANDBOOK 667 HE 20663 000 Issue 13 Page 33 Figure 19 Standard Loop Configurations b Diamonds are largely obsolescent use for replacement or MOVA only ...

Страница 34: ...argely obsolescent use for replacement or MOVA only THIS CONFIGURATION TO COVER 6 LANES MAXIMUM AS SHOWN Figure 21 Distance X Y and Z Loops to Stop Line Distance from Stop Line to X loop Number of Loops Distance from Stop Line to Y loop Distance from Stop line to Z loop 39 m 3 25 m 12 m 30 m 3 18 m 7 m 18 m 2 6 m ...

Страница 35: ...metres Triple SDE Inner 91 metres Triple SDE Outer 159 metres Speed Assessment 151 metres Note For full details refer to HA Specification MCE 0108B Figure 23 Dimensions 1 Lane Counting Loop For full details refer to HA specification MCE 0115A A Loop 2 2 5 3 3 5 4 4 5 5 4 5 4 3 5 3 2 5 2 1 5 1 0 5 0 Width of Road metres Centre of Road Distance across Road metres ...

Страница 36: ...age 36 Figure 24 Dimensions 2 Lane N Counting Loops For full details refer to HA specification MCE 0115A B Loop A Loop 3 4 5 6 7 8 8 7 5 7 6 5 6 5 5 5 4 5 4 3 5 3 2 5 2 1 5 1 0 5 0 Width of Road metres Centre of Road Distance across Road metres B Loop ...

Страница 37: ...ge 37 Figure 25 Dimensions 3 Lane N Counting Loops For full details refer to HA specification MCE 0115A C Loop B Loop B Loop A Loop A Loop 7 8 9 10 11 12 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Width of Road metres Centre of Road Distance across Road metres ...

Страница 38: ...nsions 2 Lane N 1 Counting Loops For full details refer to HA specification MCE 0115A B Loop A Loop 3 4 5 6 7 8 C Loop B Loop 8 7 5 7 6 5 6 5 5 5 4 5 4 3 5 3 2 5 2 1 5 1 0 5 0 Width of Road metres Centre of Road Distance across Road metres Not recommended below this width ...

Страница 39: ...tion MCE 0115A C Loop B Loop B Loop A Loop D Loop A Loop 7 8 9 10 11 12 12 11 10 9 8 7 6 5 4 3 2 1 0 Width of Road metres Centre of Road Distance across Road metres Not recommended below this width Figure 28 Cabling Through the Kerb Bottom of slot Footway Kerb Bitumen Asphalt backfill Slot Cable Concrete or asphalt backfill Duct through kerb ...

Страница 40: ...LOOP DETECTOR HANDBOOK 667 HE 20663 000 Issue 13 Page 40 Figure 29 Cabling Under the Kerb Bottom of slot Footway Kerb Bitumen Asphalt backfill Slot Cable Concrete or asphalt backfill Duct under kerb ...

Страница 41: ...MPJ1 or MPJ2 resin filled torpedo joint unless the customer specifies other jointing systems Jointing of feeder cable to detector loop tails will use the same joint unless the Authority specifies a heatshrink or other type of joint Refer to section 2 7 for identification of pairs Some Authorities are specifying joints based on short lengths of cable duct with cable duct plugs The manufacturers ins...

Страница 42: ...er to avoid eccentricity Check and adjust as necessary the clearances between the joint components and the joint components and the shell Clean the outer insulation at the box entry positions with a dry cloth Position the box shells centrally round the joint and secure them together by hand tightening the cable ties provided ensuring that the tightening does not distort the half shells and thus de...

Страница 43: ... end several times round the clip to effect a seal and entrap air Grip the bag securely at each end and up end it 4 or 5 times to disturb the powder settlement paying particular attention to the bag corners Open the tin of liquid unroll and open the bag Pour all the contents of the tin into the bag ensuring spillage of liquid does not occur Fold the corners of the bag to the middle and roll around...

Страница 44: ...hrough the outer insulation of the cable at the dimension given above from the end ensuring that the armour is well scored Remove the outer insulation Break off the armour by repeated bending Terminate bedding so that 10 mm projects beyond the armour For un armoured cable Remove the outer insulation at the dimension given above for stripping armour Cut cable cores to length ensuring that the joint...

Страница 45: ...nds as in section 3 2 4 If one tail end only is to be crimped in a crimp sleeve remove 24 mm of insulation from the tail and double the end back prior to crimping This will ensure that a secure crimp is made Insert the prepared core and tail end s into opposite ends of the crimp sleeve allowing a 2 mm protrusion at each end and crimp both ends of the sleeves using the correct crimping tool The cri...

Страница 46: ...LOOP DETECTOR HANDBOOK 667 HE 20663 000 Issue 13 Page 46 Figure 30 Preparation of Armoured Cable End Figure 31 Armoured Cable to Armoured Cable Joint ...

Страница 47: ...h potential This is due to track resistance and the return traction current flowing through it In the Manchester Metrolink system the highest track vehicle potential known as the touch voltage is estimated to be 34 9 V for trains crush loaded on minimum headway and 109 V under short circuit fault conditions The fault is said to persist for a maximum of 100 ms The traction current is DC and the res...

Страница 48: ...the tools or test equipment will therefore be connected to the controller earth and should not come into contact with the LRT track or vehicles Neither the RCD if fitted nor the mains supply fuse will provide protection against the possible heavy current resulting from accidental contact Care must be taken when using metal ladders to gain access to above ground detectors and signals heads to preve...

Страница 49: ...ICROSENSE PEEK SARASOTA DETECTORS MSED MXED Detectors Front Panel binary switches Link 28 on PCB Peek Sarasota Mode Setting for front panel rotary switch Setting of sensitivity switches Setting of presence switch 1 2 4 VA 7 OFF ON ON ON 0V 1 Queue presence call cancel 14 ON OFF ON OFF 5V 2 SDE SCOOT MOVA 5 OFF OFF ON ON 0V 3 OTHER 4 ...

Страница 50: ...ealth and Safety 2 Jointing feeder to feeder cable 41 loop tails to feeder cable 18 42 Joints 41 Loop cable laying 15 Loop configurations 9 Loop detector sensitivity setting 19 Loop slot details 13 Loop tails 8 joint 42 LRT Precautions 47 MOVA loops 9 28 configuration 12 Presence time 19 Queue loops 9 configuration 11 Rectangular loops 9 26 Resin suppliers 15 Safety Warning 2 SCOOT loops 9 configu...

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