iss 1.pdf · track relay track feed ... track circuit interrupter. connections for dc track...

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SWITCH TOESSWITCH RAILS STOCK RAILS

HEEL OF SWITCH RAIL

CLOSURE PANELS

CHECK RAIL

CLOSURE RAILS

WING RAILS

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RAIL JOINT

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INSULATEDRAIL JOINTS

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CABLERESISTANCE

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CABLERESISTANCECABLE

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VOLTAGE0.05V 0.1V 0.3V 0.6V - 200V

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Insulation Insulation

Insulation

B

C

D

A

A SoleplateThe soleplate is formed from two metal plates secured together by a bolted connection at an intermediateposition between the rails, which includes insulated ferrules, washers and plates to maintain electricalseparation.Where the soleplate is extended to one side, as required for point machine operation, a second insulatedconnection is provided between the point machine and the nearest rail.

B Permanent Way Stretcher BarsThese connect the two point switches together and are formed from two separate pieces connectedtogether with two bolts. The bolted connection includes insulation ferrules, washers and plates tomaintain electrical separation.

C FPL Stretcher BarInsulation ferrules, washers and plates are fitted where the stretcher bar is connected to one of the pointswitch blades; usually that furthest from the drive mechanism. The design is such that the insulation canbe fitted at either end of the stretcher bar, but should not be fitted at both ends.

D Point Drive RodInsulation is provided either separately, or is incorporated into the drive rod jaw connection onto the pointmachine.

E Lock & Detector RodsInsulated bushes are fitted where the screwed end connections are attached to the switch extensionpieces.


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TRACK RELAY TRACK FEED

NON-PREFFERED PARALLEL BONDING

TRACK FEED

TRACK RELAY

PREFERRED SERIES BONDING


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STOCK RAIL

SWITCH RAIL

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RFA RFBRRBRRA

TC “A” TC “B”

OPEN CIRCUIT FEED VOLTAGE VFA VFB

FEED RESISTANCE RFA RFB

RELAY RESISTANCE RRA RRB

SIGNAL RAIL EARTH RESISTANCE RSA RSB

COMMON RAIL EARTH RESISTANCE RCA RCB

COMMON RAIL

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FURTHER TRACK CIRCUITS

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IRJ IRJ½ TRACTION CURRENT

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LOCALCONTROL

DOUBLE RAIL AC TRACK CIRCUIT WITH AUTO-COUPLED IMPEDANCE BONDS

110V

110V

RESONANT BOND

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Single rail traction return: In non-electrified areas one railshall be drawn bold, this shall be the series rail for CRBonding and the positive or BX rail for DRDS Bonding.

Signal rail insulated by IRJs

Continuous traction return rail

Electrified lines: Rails bonded, but not track circuited.

Electrified lines: Only one rail continuity bonded.

Non-electrified lines (In electrified areas): Rails not bonded.

DescriptionSymbol

Stainless steel strip on rails.


Insulating rail joints: Separate track circuits on both sides.

DescriptionSymbol

Insulating rail joints: Track circuit on left, none on right.

Insulating rail joints: Track circuit on right, none on left.

Insulating rail joints: Between different sections of the sametrack circuit.

Standard jumper bond.

Traction bond.

Yellow bond.


Structure bond.

DescriptionSymbol

Signal engineering equipment to rail bond.

Structure to Earth Wire.

Rail to rail bond (cross bonds) - (one example).

Return conductor or earth wire to rail bond.

Track circuit interrupter.

Connections for dc track circuits.

Connections for ac track circuits.


Connections for HVI track circuits.

Description

Guard boarding The provision of guard boarding will beindicated by a thin line on whichever sideof the conductor rail it is required.A suitable note may be added if required.

Insulated buffer stops.

Non-insulated buffer stops.

Insulated points.

Non-insulated points.

Symbol


Double rail to double rail track circuits.

Description

Double rail to single rail track circuits.

Double rail track circuits to non-track circuited line.

Intermediate impedance bond.

Cross Bonds (Track to track bonds): Using impedance bonds in double rail areas.

Tuned impedance bond.

Symbol


Tuned zone with a transmitter and a receiver.

Description

Transmitter of centre fed track circuit at an end tuning unit (ETU).

Receiver at an IRJ with an end tuning unit (ETU).

Low power: Show at transmitter only.

Example of a TI21 track circuit bonding plan.

Symbol

Note: Track circuit frequency is indicated in ( ) brackets following the track circuit name.


Transmitter.

DescriptionSymbol

Receiver.

Intermediate simple loop (loop symbol points towards TX).

Compound loop (loop symbol points towards TX).

Example of a jointed reed track circuit bonding plan electrified.

Note: Track circuit frequency is indicated in ( ) brackets following the track circuit name.

Example of a jointless reed track circuit bonding plan.


Running rail bonded at each rail joint for dc electric traction.

Description

Insulated rail joint.

Resonating bond.

Impedance bond.

Track circuit cut section.

Disconnecting link box.

To specify that more than one bondis required, indicate as shown.

Symbol


Single protective boarding.

Description

Double protective boarding.

Insulated rail joint and continuity cableto eliminate magnetisation of points.

Aluminium advance plate: Only installed for attachment of traction return bonds in areas of single rail traction return.

Symbol

Cable Identification

a Single 500mm sheathed copper cable (soldered lugs) or single 800mm sheathed aluminium cable (crimped aluminium or Cadweld aluminium lug).

c Single 161mm sheathed copper cable (gas weld heads).

d Single 161mm sheathed copper cable (soldered lugs) or single 240mm sheathed aluminium cable (Cadweld aluminium or copper lug or crimped aluminium lug).

f Single 161mm bare copper cable (gas weld heads) or single 150mm aluminium cable (crimped 20 bi-metal bond heads).

g Single 161mm copper cable (soldered 20 copper bond heads).

h Single 161mm sheathed cable (one gas weld head and one soldered lug).

j Single 161mm sheathed cable (one soldered lug and one soldered 20 copper bond head) or single 150mm sheathed aluminium cable (one crimped 20 bi-metal bondhead and one crimped aluminium lug).

m Single 1,000mm sheathed aluminium cable.

N Single 630mm sheathed copper cable.


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DescriptionSymbol

Insulated rail joint required.

Insulated soleplate and stretcher bars required (position of insulationto be shown).

Drilling of insulated soleplate for facing point lock required, toMD 82017 (position of insulation to be shown).

Extended sleepers and soleplate required for the installation ofcombined type machines with left hand drive (show in reverse for righthand drive). Standard facing points (not clamp locks), drilled toBRS-SM 318.

Extended sleepers and soleplate required for the installation ofcombined type machine. Right hand drive for single or double slips (notclamp locks), drilled to BRS-SM 319.


DescriptionSymbol

Extended sleepers and soleplate required for the installation ofcombined type machine. Left hand drive for single or double slips (notclamp locks), drilled to BRS-SM 320.

Indicates switch rail, stock rail and soleplate to be pre-drilled forhydraulic clamp locks with multiple drives and soleplate, in accordancewith BRS-SM 2200, 2228, 2240, 2244 or 2260, as appropriate. Ifconcrete sleepers are to be used, they are required to be drilled inaccordance with BRS-SM 622.

Stainless steel strip welded to rails required.


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Type Suitable ForLightly Used

Lines

IRJsRequired

Immunity From SuitableFor S & C

ac50Hz dc

DC Medium VoltageAC Immune #1

Yes Yes Yes No Yes

DC Diode #1 Yes Yes No No No

TI21 #1 No No Yes#4 Yes No

HVI #1 Yes Yes Yes Yes Yes

DC Low VoltagePlain

No Yes No No Yes

DC Low VoltageAC Immune

No Yes Yes No Yes

DC Medium VoltagePlain

Yes Yes No No Yes

DC Medium VoltageAC Immune/DCTolerant

Yes Yes Yes Yes#2 Yes

AC WR QuickRelease

No Yes No No Yes

AC 50Hz Vane No Yes No Yes Yes#3

AC 83.3Hz Vane No Yes Yes Yes Yes#3

Reed No Yes Yes Yes Yes

Aster/SF15 No No No No No

Notes:# 1 Preferred track circuits for new works.# 2 Limited dc immunity. Used in an area of ac lines close toac/dc dual lines not fitted with any means of isolating the traction railsystems. Use must be subject to a proper immunisation evaluationexercise.# 3 Single rail type has restricted length but adequate for S & Capplication.Double rail type is difficult in complex S & C but permits long lengthin plain line.# 4 The use of TI21 on ac electrified lines requires the earthing oflineside structures to be to a separate conductor rather than to therail. This precludes the use of TI21 on ac lines unless part of amajor new electrification scheme.


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1970MM (BETWEEN RUNNING EDGE)

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E Distance between staggeredpair and end of track circuit.

18.3m minimum.

F Fouling point. 1970mm between running edges

L Minimum effective lengthof track circuit.

18.3m minimum

S Physical Stagger 1.7m max: Isle of Wight lines only.

2.1m max: Signal rail overlap on electrified lines.

2.6 max: Other cases.


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POSITION OF INTERRUPTERA

113 lb. Inclined A 4180B 4955C 6675D 7635E 10185

113 lb. Vertical A 4705B 6125C 6835D 8255E 11095

95 lb.Bullhead A 4180B 4780C 5900D 7620


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Wear resisting A A 2 blue Yes 1

Wear resisting B B 3 blue Yes 1

BSC 90 AA 1 blue/1 white Yes 1

90kg chrome 1CR 1 red Yes 1

100kg chrome 1CR 2 red Yes 1

AMS HC Manganese 1 green No 2

AMS LC Manganese W 1 green No 2

MHT - - Yes 1&3

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CABLE TERMINATION LABEL


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TAIL CABLE

TOLOCATION CASE

RAIL 2DUPLICATE

RAIL 2LEAD

RAIL 1DUPLICATE

RAIL 1LEAD

TRACKCABLE

TRACKCABLE


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