BLOCK DIGRAM SEIMEN’S AFTC

Metro Rail Advantages of AFTC

Metro Rail General Rules

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Metro Rail Advantages of AFTC

Types of A F T C

 

1. Joint less Track Circuits except in point zone.
2. Immune to AC/DC Traction interference.
3. Suitable for Non-RE Section.

4. More Length.
5. Less Depends on R B Integrity (presence) of both rails are ensured in the circuit.
6. Both Rails are available for Traction Return Current.

7. Less maintenance ,less staff more reliable.
8. Sensitive TR with high % of release are not required .

TI-21 A.F.T.C.

TI-21 Can be arranged
1. End Feed arrangement(Continuous)
2. Center Feed Arrangement (Continuous) C
3. A.F.T.C. Ending with other type Track Circuit.
4. A.F.T.C. Ending with Non-Track Circuited

 

TECHNICAL SPECIFICATION OF

TECHNICAL SPECIFICATION

 

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

1. POWER SUPPLY UNIT (PSU) 2 Nos.
2. TRANSMITTER UNITS (Tx ) 1 Nos.
3. RECEIVER UNITS ( Rx ) 1 Nos.
4. TUNING UNITS (T U-Tx & TU- Rx ) 2 Nos.
5. LINE RELAY (QN1) (50 V,1350 Ω ) 1 Nos.
6. CABLES 1) Tx ,Rx TO T.U. 2 Set.
2) T.U. TO TRACK 2 Set.

BLOCK DIGRAM OF TI-21 END FEED AFTC

BLOCK DIGRAM OF TI-21 END FEED AFTC.

 

BLOCK DIGRAM OF TI-21 CENTER FEED AFTC

BLOCK DIGRAM OF TI-21 CENTER FEED AFTC 2

 

AFTC END FEED WITH NO TRACK CIRCUIT ZONE

AFTC END FEED WITH NO TRACK CIRCUIT ZONE

 

Transmitter ABB

Transmitter ABB

 

RECEIVER- ABB

RECEIVER- ABB

 

Gain Setting In T1 Type AFTC

Gain Setting In T1 Type AFTC

 

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

 

FTGS STANDRAD CONFG

 

BLOCK DIGRAM SEIMEN’S AFTC

BLOCK DIGRAM SEIMEN’S AFTC

 

Seimen’s A.F.T.C

Maximum Effective Length Of Track Circuit.

Seimen’s A.F.T.C

 

TRACK VACANCY DETECTION

TRACK VACANCY DETECTION

 

Modulation And Coding

Modulation And Coding

 

AFTC EQUIPMENT

AFTC EQUIPMENT

 

SEPARATION JOINTS

SEPARATION JOINTS

 

TRACK CONNECTIONS

TRACK CONNECTIONS

 

TRACK CONNECTIONS

 

Track side Connection box

Track side Connection box

 

Tx T.U.

Tx TU

Rx T.U.

Rx TU

Modulation Frame FTGS917

Modulation Frame FTGS917

Modulation Frame FOR POINT T.C.

Modulation Frame FOR POINT TC

 

Modulation Frame FOR X- ING T.C.

Modulation Frame FOR X- ING TC

Modulation Frame FTG S 46 T.C.

Modulation Frame FTG S 46 T.C.

 

Modulation Frame FTG S 46 – M T.C.

Modulation Frame FTG S 46 - M TC

Transmitter Board

Transmitter Board

Filter & Amplifier Board

Filter & Amplifier Board

 

Receiver – I Board

Receiver - I Board

 

Demodulator Board

Demodulator  Board

 

Receiver – II Board

Receiver – II Board

 

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