Prepared by:
Anuj Kaushal.
Chirag Singhal.
Devansh Omer.
Najeeb Ansari.
Ritesh Sati.

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Static Converter for Railway
ACKNOWLEDGEMENT
Like great books, no project is created entirely by an individual. There are many people involved in this project too and have helped a lot right from the beginning till the completion of our project. Any bouquets for the merits in this project should go to our door. Any brickbats we are ready to catch ourselves.
It is with a great sincerity, we convey our heartfull gratitude to our guide Mohd.Israr, Supervisor, Electric Loco Shed, Kanpur, for his excellent guidance, valuable advice and ample co-operation throughout the training. It is a proud privilege to have availed of the opportunity of guidance.
We are thankful to Mr.A.K.Mishra too, for their excellent cooperation during our training for the proper response of the machine. We are grateful to all the railway employees, who gave their contribution to make this report.
ELECTRIC LOCO SHED, KANPUR
The Electric loco shed, Kanpur was established during the year 1965 for homing 11 locomotives. This shed was commissioned primarily to meet the requirement of passenger and goods traffic over Indian railways. At present the shed has been expended suitably to home 176 loco motives for hauling, passenger and goods traffic.
The shed is responsible for carrying out monthly inspection schedule viz. IA, IB, IC, I0 & ICO in addition to annual and intermediate overhauling schedules.
Further the unscheduled repairs to electric locos of CNB shed & other sheds are being done as per requirements of RDSO organization & HQ’s instructions. All modification & special maintenance instructions, approved by RDSO & N.Rly. Hd.Qtr., are also carried out as per the guide lines being issued from time to time.
ELECTRIC LOCO MAINTENANCE SHED
Electric Loco Shed maintains locomotive for utilization in freight and passenger train. All the miner and major inspection are carried out in the shed on a regular schedule specified by RDSO (Research Design Standard Organization). Monthly schedule are done at an interval of 45 days and major schedule are carried out after 18 months.
QUALITY MANAGEMENT
Through this quality manual, ELS intents to provide a transparent quality system to assure its customer of ELS’s the capability in maintaining in electric locomotives to highest standard.
This quality manual has been written and develop in accordance with international quality system. Standard ISO-9001:2000. The manual is used as a refreshed document by:
• Employees of ELS to practice the quality system.
• Customers to have confidence in the capability of ELS to meet quality requirements on regular basis.
• Internal as well as external auditors for verification of compliance of the quality system.
OPERATION OF LOCOMOTIVE
The electric locomotive basically works at 25 KV, 50Hz supply. The 25KV AC supply is drawn from overhead catenaries wires. The supply from overhead wires are drawn through a pantograph inside the loco transformer. This transformer is an autotransformer from which regulated voltage is taken to a rectifier block for conversion from AC to DC .It may be worth mentioning that the final tractive effort is through DC traction motor hence AC is required to be converted to DC. The DC current from rectifier block is then filtered to pure DC and then fed to traction motor.
There are 6 traction motors which works parallel to provide the attractive effort for hauling the train.
All the operations are controlled through control circuit which works at 110 volt DC. Various power equipments during operation gets heated up and hence to cool the same, it is done by various blowers.
Different Equipments in an Electrical Locomotive
1) Pantograph
It is pneumatically operated equipment mounted on the roof for collection of current from overhead wire.
2) Main Transformer
It is an autotransformer which is utilized for drawing various grades of voltage required for operation of locomotive.
3) Rectifier
This unit consists of rectifier diodes connected in bridge for conversion of AC current to DC current.
4) Traction Motor
The traction motor is one of the most important equipment in the locomotive which transmits power to wheels for moving the trains.
5) Auxiliary Circuit
This Circuit is three phase 415 volts which supplies current to various three phase induction motors used for driving blowers for forced air cooling of major equipments like transformer, rectifier, smoothing reactor and traction motor. This 3 phase line voltage is supplied by either static converter or Rotary ARNO Converter.
6) ARNO Converter
Arno converter , is specific-duty machine for conversion of a single-phase supply into a three-phase supply. While the electric traction supply is standardized as single-phase A.C. supply, a three-phase supply is needed on locomotives for driving certain auxiliary equipments. The function of the Arno converter is to convert the incoming single-phase supply in to a three-phase supply for the auxiliaries.
ARNO Converter is of vertical construction and has a flexible mounting .The machine is of robust mechanical construction to withstand the several vibrations encountered on locomotives.