The document discusses advanced traction systems, focusing on their evolution, applications in electric trains, tram cars, and trolley buses. A case study on the WAP 7 locomotive illustrates its features, performance, and braking systems. The conclusion highlights improvements in passenger safety and comfort, with a future scope for more efficient technology and development in drive systems.

1. Advanced Traction System
with a Case study
Presentation by-
SUBRATA DEY
14/EE/79

2. Contents
Introduction
Objective
Evolution of the System
Some Commonly used Systems
Case Study
Future Scope
Conclusion
1

3. Introduction
• What is the Advanced Traction Systems?
• Application
i) Electric Trains
ii) Tram Cars
iii)Trolley buses.
2

4. Objective
•High adhesion coefficient
•Efficient braking
•Cost effective
3

5. Evolution
• Started in 1853 AD
• 1920 : Nationalisation
• 1925-1932: Electrification
• 1957 : Adoption
4

6. Electric Traction Systems
• Tractive force coming from electric motors
• Electric traction is considered to be an advanced
traction system and the most efficient of all other
traction systems such as Steam and Internal
Combustion (IC) engine type systems etc.
5

7. Classification
ELECTRIC
TRACTION
DC System
AC System(single
phase , 3-phase)
Composite(Single
phase- 3 phase, Single
phase to DC)
6

8. Working Principle
7

9. Case Study:
WAP 7 LOCO
• The WAP 7 (Wide/broad Gauge AC Electric
Passenger, Class 7), three phase AC electric
passenger locomotive developed by Chittaranjan
Locomotive Works.
• Rajdhani, Shatabdi and Duronto
8

10. Salient Features
Gauge – 1676 mm ( 5 feet 6 inch)
Continuous HP - 6120 HP
Starting Tractive Effort - 322 KN
Max Speed - 180 - 200 km/h (Capable) | 140 km/h (Operational)
Wheel Arrangement – Co-Co
System Voltage – 25KV ac, 50Hz
Weight of Loco - 123 Tonnes
Type - Passenger
9

11. Working of WAP 7
.
10

12. Braking Systems
• Regenerative brake (controlled by angle transmitter)
• Pneumatic automatic train brake (controlled by pneumatic
automatic brake handle)
• Direct loco brake (controlled by direct loco brake handle)
• Parking brake (controlled by parking brake push button)
• Anti-spin brake (controlled by SLG)
11

13. Special Features
•FIRE DETECTION SYSTEM
• DEAD MAN MODE
12

14. Conclusion
• It can be seen that use of advanced electric drives
have paved the way for better services in Traction
system.
• Employment of safety features has increased
comfortability and safety of the passengers.
13

15. Future Scope
• More efficient Energy saving technology could be
adopted for faster locos using onboard storage
batteries.
• More development in the drive technology can
provide effective braking system.
14

16. References
ohttps://en.wikipedia.org/wiki/Indian_locomotive
_class_WAP-7
oindianrailways.gov.in/railway board/AC Traction
oUtilisation of Electrical Power by R. K. Rajput
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17. Thank you.