Code of Practice : Preferred Value Testing Data Iss 1.pdf · Silec Mechanical Treadles Arm Top to...

Code of Practice

GK/RC0723

Issue One

Date Dec 1997

This document is the property of Railtrack PLC. It shall not be reproduced in whole or in part without the written permission of the Controller, Safety Standards. Published by Safety & Standards Directorate Railtrack PLC Railtrack House Euston Square London NW1 2EE ©Copyright 1997 Railtrack PLC

Submitted by _____________________________________________________ Richard Genner Nominated Responsible Manager Approved by _____________________________________________________ Philip Wiltshire Chairman, Train Control and Communications Subject Committee

Synopsis This Code of Practice gives preferred values for testing data for signalling works in support of GK/RT0221.

Code of Practice : Preferred Value Testing Data

Withdrawn Document Uncontrolled When Printed

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Code of Practice

GK/RC0723

Code of Practice : Issue One

Preferred Value Testing Data Date Dec 1997

Page 1 of 16

R A I L T R A C K 1

Contents Section Description Page

Part A Issue record 2 Distribution 2 Health and Safety Responsibilities 2 Supply 2

Part B 1 Treadles 3 2 Track Circuits 3 3 Points 8 4 Signals and Automatic Warning System 9 5 Cable Conductor Resistance 10 6 Apparatus Operating Currents and Voltage 12

References 16


Code of Practice

GK/RC0723

Issue One Code of Practice : Date Dec 1997 Preferred Value Testing Data Page 2 of 16

2 R A I L T R A C K

Part A Issue record

This Code of Practice will be updated when necessary by distribution of a complete replacement.

Amended or additional parts of revised pages will be marked by a vertical black line in the adjacent margin.

Issue Date Comments 1 Dec 1997 New document, Appendices F1, F2, F3, G, H and J from GK/RT0221 Issues 1 and 2.

Distribution Controlled copies of this Code of Practice shall be made available to all personnel who are responsible for the testing and commissioning of signalling systems.

Health and Safety Responsibilities

In issuing this Code of Practice Railtrack PLC makes no warranties, express or implied, that compliance with all or any of Railway Group Standards or Codes of Practice is sufficient on its own to ensure safe systems of work or operation. Each user is reminded of its own responsibilities to ensure health and safety at work and its individual duties under health and safety legislation.

Supply Controlled and uncontrolled copies of this standard may be obtained from The Catalogue Secretary, Railtrack Safety & Standards Directorate, Floor 1, Railtrack House, Euston Square, London, NW1 2EE.

Telephone: 085 78774 or 0171 557 8774 (BT)

Facsimile: 085 79072 or 0171 557 9072 (BT)


Code of Practice

GK/RC0723



Page 3 of 16

R A I L T R A C K 3

Part B 1 Treadles

General Data

Silec Mechanical Treadles

Arm Top to Rail Top

Arm to Running Edge

Time to Return to Normal

Cautor Type 59 11(+1) mm 10(+2) mm 6 to 8 secs) or as specified

Cautor Type 69 16(+1) mm 10(+2) mm 6 to 8 secs) in design

2 Track Circuits General Data

Track Circuit Type Minimum Shunt

Ohms

Desired Shunt Ohms

A.C. Auto/Res Impedance Bond. 0.3 0.8

DC. All types. 0.5 0.8

Jeaumont / Lucas. 0.5 0.8

Westrak / Relay end fed. 0.5 0.8

Reed. 0.5 0.8

Reed (Impedance Bonds). 0.4 0.8

Aster 1 Watt, Jointless. 0.5 0.8

U Type, Jointless. 0.5 0.8

SF Type, Jointless. 0.5 0.8

TI21 Type, Jointless. 0.5 0.8

(0.3 with impedance bond)

FS2600 tba tba


Code of Practice

GK/RC0723


4 R A I L T R A C K

2.1 TI21 Track Circuit Receiver Gain Connections – Length in Metres Gain Step

Length High Power

Length Low Power

Input 1 to

Strap 1 to

Strap 2 Strap 3

1 1H 1L

2 3L 1L 1H to 3H

3 200–240 3H 3L

4 240–300 50–90 1H 3L 1L to 3H

5 300–360 90–110 3L 9L 1H to 9H 1L to 3H

6 360–415 110–140 3L 9L 3H to 9H

7 415–475 140–170 3L 9L 1H to 3H 1L to 9H

8 475–535 170–200 1L 9L 1H to 9H

9 535–595 200–230 9H 9L

10 595–655 230–250 1H 9L 1L to 9H

11 655–710 3H 9L 1L to 3L 1H to 9H

12 710–770 3H 9L 3L to 9H

13 770–1100 1H 9L 1L to 3H 3L to 9H

Notes :

Input 2 is always taken to the bottom terminal of the 1 ohm resistor.

Strap 1 is connected from the top terminal of the 1 ohm resistor to the terminal indicated in the table.

No entry in a strap column indicates that the strap is not required for that gain setting.

The above table is for the initial setting of the receiver in non–electrified areas.

Where impedance bonds are installed, the setting should be one gain step higher than indicated in the table.

When a centre fed transmitter is used, the distances in the table refer to that for each half of the track circuit (ie, from the transmitter to a receiver).


Code of Practice

GK/RC0723



Page 5 of 16

R A I L T R A C K 5

2.2 U/SF Type Track Circuit Receiver Gain Connections – Length in Metres

Length REC 1

to REC 2 to

Strap Length REC 1 to

REC 2 to

Strap

50 A B 800 D H EG C D A H BD,EG A D BC C H EG A H BC, EG 100 D E 900 E H CF A E BD E H AF, BD C E E H DF A E BC D H AF, BC

200 E G CF 1000 D H CF E G AF,BD B H AF E G DF F H D G AF,BC A H BF C H DF 300 D G CF A H BC,DF B G AF D H EF F G A H BD,EF A G BF C H EF A H BC,EF 400 C G DF A G BC,DF D G EF A G BD,EF 500 C G EF A G BC,EF E H CG E H AG,BD 600 E H DG D H AG,BC D H CG B H AG 700 G H A H BG C H DG A H BC,DG


Code of Practice

GK/RC0723


6 R A I L T R A C K

2.3 Intermixing of Audio Frequency Jointless Track Circuits (TI21/U/SF15/Z) Transmitter on the lower power setting shall be a minimum of 50 metres from a receiver of the same frequency (ie minimum length of TC is 50 metres).

Transmitter on the normal power setting shall be a minimum of 200 metres from a receiver of the same frequency (ie minimum length of TC is 200m).

Track circuit arrangements of the following frequencies are prohibited.

• Equipment in the same location case.

• Parallel track circuits.

• Track circuits abutting at an insulated rail joint.

• Tail cables in the same cable route.

PROHIBITED INTERMIXING

U TYPE/SF15 TI21 Z TYPE

1700 Hz Freq A

2300 Hz Freq B

2000 Hz Freq C

2600 Hz Freq D 2580 Hz

2.4 Use of Audio Frequency Track Circuits with Axle Counters (TI21/U/SF/15/Z/REED) A 5kHz axle counter detector (ie. One on each rail) should be a minimum of 200m from a U Type/SF15 1700 Hz transmitter.

A 5kHz axle counter detector should be a minimum of 100m from a Z Type 1580 Hz or 1850 Hz transmitter.

Any axle counter detector should be a minimum of 5m from any audio frequency track circuit tuned zone.

Any axle counter detector should be a minimum of 15m from any audio frequency track circuit end termination.


Code of Practice

GK/RC0723



Page 7 of 16

R A I L T R A C K 7

2.5 Interfacing of Audio Frequency Track Circuits (TI21/U/SF15/Z) All such interfaces must have an Insulated Rail Joint in both rails.

Non preferred arrangements must not be perpetuated in new work, but may be encountered when interfacing with existing track circuiting arrangements.

ADJOINING TRACK CIRCUITS

Track Circuit WR Quick Rel Feed

WR Quick Rel Relay

D.C. Jointed F or R

A.C. Jointed F or R

Non Track Circuited

U/SF15 TX Non Prefer Prohibited Non Prefer Non Prefer Non Prefer

U/SF15 RX Permitted Prohibited Permitted Permitted Permitted

TI21 TX Permitted Prohibited Permitted Permitted Permitted

TI21 RX Permitted Prohibited Permitted Permitted Permitted

AC F or R Permitted Prohibited Permitted Permitted Permitted

Z Type Tx Permitted Prohibited Permitted Permitted Permitted

Reed TX Permitted Prohibited Permitted Permitted Permitted

Reed Rx Permitted Prohibited Permitted Permitted Permitted


Code of Practice

GK/RC0723


8 R A I L T R A C K

3 Points General Data

Point Switch Opening Type of Point Layout Normal Minimum Maximum Turnout 108mm 102mm 120mm Switch Diamond 85mm Facing Point Lock–obstruction Type of Point Operation Allows Lock Prevents Lock All 1.5mm 3.5mm Point Detection–obstruction Type of Point Operation Detection

Allows Detection Prevents

Mechanical 3.5mm 5mm

Point Machine 3.5mm 5mm

Clamplock 2.5mm 4mm

Supplementary Detector 6mm 8mm Clutch Slip Current Type of Point Machine Acceptable Slip Current GEC HW1000 / HW2000 Normal + 25% to 50%

WBS Style 63 Maximum 15 Amps

ML Style Jea 50 Normal + 25%

GRS Style 5A 8 to 10 Amps

WBS Style M3 / M3A 8 to 10 Amps

SGE Style HB 8 to 10 Amps


Code of Practice

GK/RC0723



Page 9 of 16

R A I L T R A C K 9

4 Signals and Automatic Warning System

General Data

Signal Beam Alignment Height of most restrictive aspect above Rail Level

Aligned to rail level at distance in Rear of Signal

3 metres 185 metres

Signal Lamp Voltages Lamp Type

Application Nominal Voltage

Minimum Voltage

Maximum Voltage

SL35 Multi Aspect Signal 12 10.5 10.9 SL35 Junction Indicator 12 10.5 10.9 SL34 Searchlight Signal 12 11.3 11.7 Other 6 5.7 6.0

Note : Quartz halogen lamps shall always be run at their rated voltage.

Automatic Warning System Electro Inductors Inductor Type

Coils Connected

Nominal Voltage

Minimum Voltage

Maximum Voltage

Current Amps

Yellow Parallel 12 10.8 0.85 Series 24 21.6 24 0.45 Yellow 24 22.8 25.8 0.8 Suppressor Green Mk1 12 4.6 Extra Strength Parallel 24 2.3 Series 48 1.15 Green Mk2 60 51 60 1.5 Extra Strength Green Mk2 Extra Strength Suppressor

110 93.5 121 2

Series Operation Parallel Operation

(+ve to 4) (+ve to 4)

(–ve to 1) (–ve to 1)

(strap 2 to 3) (strap 1 to 2)

(strap 3 to 4)


Code of Practice

GK/RC0723


10 R A I L T R A C K

5 Cable Conductor Resistance

General Data

Minimum Values of Insulation Resistance New lineside cables 50 Megohms New tail cables 30 Megohms Existing lineside cables 1 Megohm Existing tail cable 1 Megohm Table of Conductor Loop Resistance for Metric Signalling Cables (Copper Conductor) Conductor Strand(s) Size (c.s.a.) mm

2 Maximum Loop Resistance Ohms/Km

0.75 49.6 1.15 34.6 1.5 24.4 2.5 15.12 2.5 (f) – (f) flexible conductors 16.42 10.0 3.68 16.0 2.32 35.0 1.06 70.0 0.54 95.0 0.39

No. of Conductor Strands/ Strand Diameter mm

1/0.85 66.4 9/0.30 63.4 1/1.13 36.4 16/0.30 35.6 1/1.53 19.92 50/0.25 16.42 7/0.67 15.12 1/1.78 15.12 7/0.85 9.4 7/1.04 6.22 7/1.35 3.68 7/1.70 2.32 7/2.14 1.468 19/1.53 1.058 19/1.78 0.782 19/2.14 0.540 19/2.52 0.390 37/2.03 0.308 37/2.25 0.252


Code of Practice

GK/RC0723



Page 11 of 16

R A I L T R A C K 11

Table of Conductor Resistance for Metric Telecomm Type Cables Commonly Used for Signalling Purposes (Copper Conductor)

Conductor Strands

Diameter mm

Single Core Resistance Ohms/Km

1 0.60 55.00

1 0.90 27.50

1 1.27 13.75


Code of Practice

GK/RC0723



6 Apparatus Operating Currents and Voltages

General Data

The figures given in these tables are for the equipment loading at 110 volts AC (corrected to 0.9 power factor), and include the transformers where appropriate. Having summed the VA total at 110 volts for a location, 10% should be added for 650/110 transformer losses.

Signals Route Indicators Watts Multi–aspect 40 Junction 160 Top yellow aspect 30 Theatre greater than 300 Searchlight 50 Stencil 40 Ground position light 70 Subsidiary 70 Banner 55 Signal motor 70

Points Hot Axlebox Detector Relays 30 Detector 250 Rectifier per end 1000 System 1300 Battery 850 Track Circuit Automatic Warning System D.C. Feed and Relay 7 Relays 5 U Type Transmitter 50 Inductor 50 U Type Receiver 20 Suppressor 80 Quick Release 20–40

Miscellaneous Level Crossings Relay 3.5 AHB Machine 1100

Indication bulb 1.2 MB Machine 1100

Location Heater 25 CCTV System 1000

Point Heater 25


Code of Practice

GK/RC0723



Page 13 of 16


Shelf Type Timing Relays

Resistance Ohms

Current mA

Use

4F/B or 2F/B 2F 2 PU–100, DA–60 Track 4F/B or 2F/B 2F 250 PU–10, DA–6 Line 6F/B or 4F/B 2F 250 PU–10, DA–6 Line 4F/B or 2F/B 2F 1000 PU–5, DA–3 Control/Line 6F/B or 4F/B 2F 1000 PU–5, DA–3 Control/Line 1B 150 10 Lamp Proving Post Office Type Neutral Relays

Resistance Ohms

Current mA

Use

1F 0.3 PU–750, DA–400 (PO)R 1F, 1B 0.3 PU–750, DA–400 G(M)ECR 1F, 1B 250 ZR 1F 1000 R(LS) 1F 10 50 Block Bell 1F 50 50 Block Bell Panel/Shelf Type Polar Relays

Resistance Ohms

Current mA

Use

1ND/R 400 10 Block Control 1ND/R 250 6 Block Control 1 N/R 250 6 Signal Repeat 1ND/R 50 22 Interlink 1ND/R 50/1K 25/6 Interlink 1F 100 100 Key Token 2F 400 10 SL STG Shelf Type Neutral Polar Relays

Resistance Ohms

Current mA

Use

4N/R – 4F/B – 2F 1000 Point Detection 4N/R – 4F/B – 2F 250 Point Operation Shelf Type Timing Relays

Resistance Ohms

Current mA

Use

2F/B, 1F 300 when timing. Time Release 1F, 1B Thermal Approach Lock


Code of Practice

GK/RC0723



Electric Lever Locks

Resistance Ohms

Current mA

Type

N/P Vertical 42 220 STO 10 1000 WB&S Co. Horizontal 20 340 Vertical 20 300

Block Bells Resistance

Ohms Current mA

Type

Locally Operated 10 500 Line Operated 50 50 Ground Frame Resistance

Ohms Current mA

Type

Release Instrument 100 100 Key Release

Electric Key Token

Resistance Ohms

Current mA

Type

Commutator Lock 10 600 Automatic Warning System Inductor

Resistance Ohms

Current mA

Type

Yellow Parallel 8 850 12 V Operation Yellow Series 32 (2 * 16) 450 24 V Operation Yellow Suppressor 800 24 V Operation Green Mk1 Parallel 4600 12 V Operation Green Mk1 Parallel 2300 24 V Operation Green Mk1 Series 1150 48 V Operation Green Mk2 1500 60 V Operation Green Suppressor

2000 110 V Operation

Note: Yellow AWS inductors are used for non electrified lines and lines electrified at 25KV a.c. Green AWS inductors are used for lines electrified at 750V d.c. and lines where dual electrification exists.


Code of Practice

GK/RC0723



Page 15 of 16


Needle Type Indicators

Resistance Ohms

Current mA

Use

Coil P 50 8.0 As Below

Coil Q 200 3.5

Coil R 1000 2.0

Coil S 4000 2.0 Application Indication Dial A (3 Pos) Stop Signal Arm On–Failed–Off

Dial B (3 Pos) Distant Signal Arm On–Failed–Off

Dial C (3 Pos) Distant Signal Slot Arm and Slot On–Failed–Slot Off

Dial D (3 Pos) Stop Signal Slot Arm and Slot On–Failed–Slot Off

Dial E (3 Pos) Points Normal–Out of Correspondence–Reverse

Dial F (2 Pos) Lock Free–Locked

Dial G (2 Pos) Light Alight–Out

Dial H (2 Pos) Track Circuit Clear–Occupied

Dial Z As specified


Code of Practice

GK/RC0723



References Standards GK/RT0221 Signalling Works Testing


Code of Practice : Preferred Value Testing Data Iss 1.pdf · Silec Mechanical Treadles Arm Top to...

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