Types of A.F.T.C.Types of A.F.T.C.

TI-21(ABB)

FTGS(SIEMENS)

ALSTOM(DC-CODED)

UM-7SEF-FRANCE

• 1699 Hz• 2296 Hz• 1996 Hz• 2593 Hz

• 1549 Hz• 2146 Hz• 1848 Hz• 2445 Hz

8-TYPESFTGS-46• 4.75 KHz• 5.25 KHz• 5.75KHz• 6.25 KHz

FTGS-917• 9.5KHz• 10.5 KHz• 11.5 KHz• 12.5 KHz• 13.5 KHz• 14.5 KHz• 15.5KHz• 16.5 KHz

6-TYPES• 2100 Hz• 2500 Hz• 2900 Hz• 3300 Hz• 3700 Hz• 4100 Hz

4-TYPES• 1700 Hz• 2300 Hz

• 2000 Hz• 2600 Hz

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12-TYPES

ADVANTAGES OF AFTCADVANTAGES OF AFTC

• Joint less Track Circuits except in point zone.

• Immune to AC/DC Traction interference.• Suitable for Non-RE Section.• More Length.• Less Depends on RB Integrity (presence)

of both rails are ensured in the circuit.• Both Rails are available for Traction

Return Current.• Less maintenance ,less staff more reliable.• Sensitive TR with high % of release are

not required .

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ABB (T1 TYPE) A.F.T.C.

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TI-21 A.F.T.C.TI-21 Can be arranged

• End Feed arrangement(Continuous)• (Center Feed Arrangement Continu

)ous

• A.F.T.C. Ending with other type Track Circuit.

• A.F.T.C. Ending with Non-Track Circuited Zone.

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TECHNICAL SPECIFICATION OF TI-21

+ / - 5 mm MAX about centre of tunned area.

6. TRACK CIRCUIT EXTRIMITY

20 Mt. +/- 0. 5 Mt.10. SEPARATION JOINT (TUNED AREA)LENGTH

1 Milli ohm maximum per connection.

9. TRACK CONNECTION RESSISTANCE

Standard Nutral Relay 50 V DC.8. RELAY

0.8 -- 1. 8 V 4.5 -- 7.5 V

7. TRACK FEED 1. LOW POWER MODEVOLTAGES 2. HIGH POWER MODE

1500 KHz TO 2600 KHz. Approx.11. FREQUENCY RANGE

-30 O TO + 70O5. TEMPARATURE RANGE

0.15 MAXIMUM0.5 MAXIMUM

4. TARIN SHUNT 1. INSIDE TUNNED AREA2. OUTSIDE TUNNED AREA

0.5 mho/km max.3.BALLAST CONDUCTANCE

50 TO 250 M200 TO 1100M (960 M)600 TO 2000 M (1800M)

2.LENGTH 1. LOW POWER MODE2. HEIGH POWER MODE .(END FEED)3. HEIGH POWER MODE (CENTER FEED)

11OV,50 KHz OR 24 V DC1.POWER SUPPLY

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COPONENTS FOR END FEED A.F.T.C.

• POWER SUPPLY UNIT (PSU) 2 Nos.

• TRANSMITTER UNITS (Tx ) 1 Nos.

• RECEIVER UNITS ( Rx ) 1 Nos.

• TUNING UNITS (T U-Tx & TU- Rx ) 2 Nos.

• LINE RELAY (QN1) (50 V,1350 ) 1 Nos.

• CABLES 1) Tx ,Rx TO T.U. 2 Set.

2) T.U. TO TRACK 2 Set.

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TU-B TU-A

Rx-B

PSU

Tx-A

TU-A TU-B

Rx-A

PSU

Tx-B

Tx - END Tx - ENDRx - END Rx - END

24 V DC24 V DC

110 V AC/50 KHz +/- 7%I/P Tapping (5-0-95-105-110)

O/P Volt. – 22.5 v to 30.5 V DCO/P Current – 4.4A(max)

Ripple Volt-3 V PIP

50/.25 Sq.mm Cu Cable 350 Mt. Max.

10V to 11V AC (A,C,E,G)15 V to 16 V AC (B,D,F,H)

Voltage On Rail

V -TXV –R X

0.8V-1.8V 4.5V – 7.5 VMODE Low Power Normal

0.5 – 0. 8 V 0.4 – 1.6 V

24 V DC 24 V DC

35 Sq mm Cu/its Eq.

50/.25 Sq.mm Cu Cable 30 Mt. Max.

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BLOCK DIGRAM OF TI-21 END FEED AFTC

TU-B

Rx-B

PSU

TU-A TU-B

Rx-A

PSU

Tx-B

Tx - ENDRx - END Rx - END

24 V DC24 V DC

110 V AC

ETU

Tx-A

Tx - END

TU-A

Rx-A

PSUTRA TRA

Rx - END

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BLOCK DIGRAM OF TI-21 CENTER FEED AFTC

AFTC END FEED WITH NO TRACK CIRCUIT ZONE

TU

TU

20 +/- 0.5 Mt.

< 1 Mt.

AFTC END FEED OTHER TYPE OF TRACK CIRCUIT ZONE

OTHER T/CKT.

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MULTI-VIBRETOR

MODU-LATOR

O/PFILTER

OSCILATOR

1

2

3 4 5 6OUT-PUT AMPLIFIER

MATCHING TRANSFORMER

TOTU

F+17 F+17 F+17F-17 F-17

Modulation at 4.8 KHz

O/PAMP

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Transmitter ABB

4a

FILTER

FILTER

FILTER

FILTER

AMPLIFIER

AMPLIFIER DEMODULATOR

DEMODULATOR

TIMEDELAY

RELAYDRIVE

SEQUENTIALAND GATE

INPUT TRANSFORMER

INPUTFROMTU

OUT PUT RELAY

1

2a 3a 5a

64b2b 3b 5b

7

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RECEIVER- ABB

1H

1L

3H

3L

9H

9L

FROMETU /TTU

1

9

3

1

IP1

IP2

GAIN IP1 IP2 Loop-1 Loop-25 3L 9L 1H-9H 1L-3H7 3L 9L 1H-3H 1L-9H9 9L 9H

12 3H 9L 3L-3H13 1H 9L 1L-3H 3L-3H

• Gain Calculation• Step 1 :-IP2 to 9 L through 1 Register • Step 2:-9 L to 9H = +9 Gain• 9H to 1L Loop = 0 Gain• Step3 : - 1L to 1 H = +1Gain• 1 H to 3 H Loop = 0 Gain• Step 4:-3H to 3L = -3 Gain• Step 5 :-3L to IP1 = 0 Gain• Total Gain = (+9 )+ (+1)+(-3) = 7

Gain Setting In T1 Type AFTC

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Seimen’s A.F.T.C.Seimen’s A.F.T.C.• 6 System Characteristics and Technical Data• Range of applications Station and open- line tracks, points and crossings• Joints Electrical separation joints with S. terminal and shunt bonds• Traction current return Two-rail• Interference Frequency-modulated transmission provides immunity to interference• Cable faults Protection by coded transmission and intercore short-circuit supervision• Component failures Safety measures dual-channel design of receive equipment parallel movement (synchronism) of trac circuit relays: error detection by divergent condition of the two relays• Shock-hazard voltages Electrical isolation between outdoor and indoor equipment• Rated operating frequencies • FTG S 46: 4.75 kHz, 5.25 kHz, 5.75 kHz, 6.25 kHz FTG S 917: 9.5 kHz, 10.5 kHz, 11.5 kHz, 12.5 kHz, 13.5 kHz, 14.5 kHz, 15.5 kHz, 16.5 kHz• Modulation Frequency modulation (shift keying)• Bit pattern for coding 15 different bit patterns• Transmission speed For the transmission of time-multiplex bit patterns: VD = max. 200 bit/s• Operating reliability MTBF: 5 years• Pick-up delay of track circuitt : approx. 0.6 s (in special cases 1.3 s)• relays• Drop-out delay of track circuit tdr: approx. 0.25 s (in special cases 0.17 s)• relays• Power supply Operating voltage:• U = 230 V AC +10 %/—15 %, 50Hz + 2%• System Description• VT 1 P 64• Siemens code no:• 43• FTG S Track Circuit• A25000-X22-Q41-O1-7629• of• without Data Transmission• (EZS)• 15-12-97• Notice no: K75/D62/V• 44• Copyright © Siemens AG 1997• All Ri• ghts Reserved• BFTGSENG.DOC

Technical data-1

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Technical data-2

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FTGS STD CONFG.

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FILTER

AMPLIFIER

TRANSMITTER RECEIVERRx 1.2

RECEIVERRx 1.1

RESPONCE LEVELSETTING FILTER

RECEIVERRx 2.2

RECEIVERRx 2.1

DE-MODULATOR

DE-MODULATOR

RELAY-2

RELAY-1

POWER SUPPLY+12 V;+5V DC

T.U. T.U.

CABLES

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BLOCK DIGRAM SEIMEN’S AFTC

Maximum Effective Length Of Track Circuit.

Range Of Influence For RB = 1.5 OHM X K.M. RB = 1.5 OHM X K.M.

FTGS917

REMOTE FEEDING ZA ST 917 M 917 ST 917 M 917

4.5 KM <= 1.0 OHM 300 M 750 M 350 M 950 M

4.5 KM <= 0.5 OHM 350 M 850 M 400 M 1000 M

6.5 KM <= 0.5 OHM 300 M 700 M 330 M 850 MREMOTE FEEDING ZA ST 917 M 917 W/K

917ST 917 M 917

6.5 KM <= 0.5 OHM 600 M 1200 M 750 M 1500 M

FTGS 46

ZA = PERMEETED AXLE SHUNT ST=STANDARD LAYOUTRB = SPECIFIC BALLAST RESISTANCE M = CENTER – FED –LAYOUTW/K = POINTS & CROSSING LAYOUT.

Seimen’s A.F.T.C

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TRACK VACANCY DETECTION

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Modulation And Coding

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AFTC EQUIPMENTAFTC EQUIPMENT

INDOOR EQUIPMENT

• CPU FRAMES

• TRANCMITTER CARD

• AMPLIFIER / FILTER CARD

• RECEIVER – I CARD

• RECEIVER – II CARD

• DEMODULATION CARD

• RELAY CARD

OUT DOOR EQUIPMENT

• TUNNING UNIT :-

Feed In (Tx) Feed Out (Rx)

• TRACK CONNECTIONS.

• OUTDOOR CABLE :-

(Star Quad Cable 9mm Dia)

• TRACK TO T.U. CONNECTIONS.

(25 Sq Mm Cu Lead Rope)

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SEPARATION JOINTS

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TRACK CONNECTIONS9M 9M

3.2M 3.2M

FTGS 46 6.7 M

1.75 MFTGS 917 FTGS 917

FTGS 46

S-BOND OF STEEL WIRE ROPE 16 mm DIA IN BET.

TWO AFTC’S

ALFA-BONDS OF GALVANISED STEEL WIRE

ROPE 16 mm DIA AT THE END OF THE AFTC’S

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S-BOND ARRENGEMENT

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Track side Connection box

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Tx T.U.

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Rx T.U.

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Modulation Frame FTGS917

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Modulation Frame FOR POINT T.C.

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Modulation Frame FOR X- ING T.C.

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Modulation Frame FTG S 46 T.C.

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Modulation Frame FTG S 46 - M T.C.

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Transmitter Board

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Filter & Amplifier Board

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Receiver - I Board

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Demodulator Board

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Receiver – II Board

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A.F.T.C.

From:- PARDESHI SACHIN S. S.E./Sig/KYN

SSE/Sig(M)/KYNMumbai Div.

C.R.India

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