TESTING OF BRAZING JOINT OF FIELD COILS CIRCUIT OF
TRACTION MOTOR TYPE TAO-659 AND HS-15250A
Roll No. 09EI59(EE)
B.Tech. 4th Year (Electrical Engineering)
DEPARTMENT OF ELECTRICAL ENGINEERING
INSTITUTE OF ENGINEERING & TECHNOLOGY
MAHATMA JYOTIBA PHULE ROHILKHAND UNIVERSITY, BAREILLY (2012-2013)
I am extremely grateful to Mr. M. A. Ansari (Senior Lecturer), Mr. Sanjay Singh(Head), Department of Electrical Engineering for their regular guidance and kind co-operation in the seminar. I would like to thank all those who have contributed to the completion of the seminar and helped me with valuable suggestions for improvement. Above all I would like to thank my parents without whose blessings; I would not have been able to accomplish my goal.
This is to certify that Mr. Varun Bali (09EI59(EE)) has satisfactorily completed the Seminar report entitled “TESTING OF BRAZING JOINT OF FIELD COILS CIRCUIT OF TRACTION MOTOR TYPE TAO-659 AND HS-15250A” in partial fulfillment of the requirements for the award of the degree of Bachelor of Technology in Electrical Engineering of the Institute of Engineering and Technology Mahatma Jyotiba Phule Rohilkhand University, Bareilly, during academic year 2012-2013.
Mr. SANJAY SINGH Mr. M.A.ANSARI
(Head) (Seminar Guide)
About Indian Railways.
Working of an electric locomotive
2 Brazing –Description
3 Object of the Report.
4 Equipments Required
5 Meggar- Description
6 Instruction Drawing
7 Testing Instructions
8 Stator testing Performa of TAO-659 after repair
9 Stator testing Performa of HS-15250 after repair
Traction motor is one of the most important electrical equipment in electrical traction. Indian railways widely uses HS15250 & TAO-659 traction motors. The ratings of the motors are as follows:- S.N.| Parameters| HS 15250| TAO-659|
1| Power rating| 630kw| 575kw|
2| Voltage Rating| 750V| 750V|
3| Current Rating| 900A| 900A|
4| Speed Rating| 895RPM| -|
5| Weight| 3500KG| 3000KG|
6| Ventilation | Forced| Forced|
7| Gear ratio| 23:58| 15:62|
8| Transformer| 5400KVA, 32 TAPS| 3460KVA, 22.5KV|
9| Rectifiers| 2-GTO| 2-GTO|
10| Number Of Main Poles Used| 6| 4|
11| Number of Inter-poles | 6| 4|
While running of locomotive the motor is subjected to various lateral and longitudinal stresses due to which the joints between the flexi coils of the main poles and the inter-poles gets loosen or even get breaks. This causes the open circuiting of the coils and thus makes the motor damaged. In order to increase the life cycle of the motor and to check the strength of the joints electrically R.D.S.O LUCKNOW provided a special maintenance instruction (S.M.I) for this type of fault occurring in motor coils. The special maintenance instruction provided by the R.D.S.O will be explained in the report. The report explains the
HISTORICAL BACKGROUND OF INDIAN RAILWAYS
Railways made their first appearance in India in April 1953, when a section from Bombay to Kalyan (32 miles) was opened to traffic. This was followed by Calcutta-Raniganj (120 miles) and Madras- Arkonam line (39 miles). The management of Railways was left to private companies who used to run this system in different territories on 99 years lease bases. There was however a clause in the lease deed, which could enable government to purchase the line after every 25 years. As railway...