: Presented By:Javed TazakIV B. Tech.,VII Sem.Electrical Engineering

Department of Electrical Engineering ,JIET

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1. Introduction About NWR Workshop2. Air Conditioning Shop3. Production Control Organization Shop4. Power Shop5. Train Lighting Shop References Conclusion

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Located near Main Railway station of Jodhpur.

Well established and running successfully as a complete organization.

Staff strength stands at 2100 employees including 150 supervisors and 6 administrative officers.

Total Area= 115339 Sq. Meter

Track Length= 8820.9 Meter3Javed Tazak

1.1 Basic Role of Workshop:

POH of Railway Coaches.

Repairing of components used in Diesel Engine for Diesel Shed.

Maintenance of machines which are installed in Jodhpur Railway Station.

Production of some components which needs to be replaced in Coaches.

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2.1 Functions of A/C Shop

2.2 Classification of AC Coaches

2.3 Main Equipments in Railway A/C Coaches

2.4 Refrigerant Cycle/AC Cycle

2.5 Roof Mounted Package Unit (RMPU) for A/C Railway Coaches

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2.1 Functions of A/C Shop:

Supply fresh air to keep low concentration of CO2.

Cool the air in summer & Heat it in winter.

Control Humidity of air.

Maintain reliable operation of all AC Equipment installed in Coaches.

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2.2 Classification of AC Coaches:

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2.3 Main Equipments in Railway A/C Coaches:

Evaporator Unit

Compressor

Condenser

A/C control panel

Air Ducts

Wiring

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Contd..

0.75 HP, 130 V, 5 A, 1500 RPM, Insulation Class-F, Natural Cooling, Blower Motor

10 HP, 110 V, 80 A, 1140 RPM, Fan Cooling, Insulation Class-I, Compressor Motor

0.75 HP, 110 V, 9.5 A, 1500 RPM, Insulation Class-F, Natural Cooling, Condenser Motor

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A/C Control Panel:Used to Control the A/C system.

Step Down Transformer of rating 415 V/110 V is installed in it.

Three stage thermostat are provided for maintain cooling & heating in coaches according to weather.

Designed in such way that in case of power failure machine shuts down & restart automatically after restoration of power.

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2.4 Refrigerant Cycle/AC Cycle:

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2.5 Roof Mounted Package Unit (RMPU) for A/C Railway Coaches:Two packaged units are used in one coach.

Useful in attaching two coaches.

Ensure comfort journey.

Various refrigerant units are installed in it.

Energy efficient , uses less electricity , saves fuel for generation.

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Weight - 900 Kg

Installation Time – 4 hrs

Refrigerant - R-22 (CHClF2) .

Low maintenance

Excellent performance as compare to Conventional AC unit.

Negligible dust problem

Based on latest technology

No water leakage problem

Salient Features of R.M.P.U. for AC Coaches:

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3.1 Introduction

3.2 Insulation Testing

3.3 Battery Charger

3.4 POH

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3.1 Introduction:

Back bone of workshop.

Inspection section

It is the responsibility of the PCO department that no faulty coaches will move from workshop.

Caring of passengers & provide protection from hazardous events.

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Contd.... It’s work starts when all shops have done their work.

Modifications are done in the sheet day by day as per RDSO(Research & Development Standards Organisation).

It also cares about the working schedule of the workers.

Every worker receives a work order from the time fixing section.

If he finishes his work before the allotted time with the desired accuracy he gets extra payment depending on the time he saved.

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3.2 Insulation Testing:

500 V, 160 RPM, Megger

Very Important Test

By Megger we can check :

Earth fault

Short circuiting between the connections

Insulation breakdown

Leaking of the battery

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3.3 Battery Charger:

135 V, 200A Transformer Rectifier Unit

Charge 110V, 800 to 950 AH lead acid batteries

Feed the AC motor load.

Control is achieved by means of Rotary Switch

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3.4 POH : POH stands for Periodic-Over-Haul.

It is done after every 18 months for a particular coach.

On arrival a shop first they note down the defects and deficiencies.

Corresponding actions are taken to heal it.

POH date is mentioned behind portion of coach. 19Javed Tazak

4.1 Introduction

4.2 Requirement of Electricity

4.3 Rules of Winding

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4.1 Introduction:

Electricity is supplied by RSEB (Rajasthan State Electricity Board).

In case of supply failure it is generated by generator sets.

Railway Workshop has its own 11/0.4 KV substation.

Incoming feeder of 11 KV is coming from 66 KV substation at Mohanpura Pulia Jodhpur.21Javed Tazak

Connected Load 4600 kVADemand 1360 kVAMaximum Demand 1400 kVAActual Utilization: Day Shift

Night shift

1100-150 kVA

400-500 kVA

Average Consumption Per Month 2,70,000 units

Lightning Consumption Per Month 15000 units

Tariff Applicable HT-1 of RSEB

4.2 Requirement of Electricity:

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4.3 Rules of Winding :Note down name plate ratings & Dimentions.

Determinations of no. of poles acc. to r.p.m. of machine.

Coil pitch ,Coil set & slots calculations.

Wire Gauge is use to calculate thickness of wire.

After washing machine with kerosene formation of turns takes place.

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Proper separators are provided in slots for protection from earth fault.

Coil’s end get soldered & Connections are made into star/delta as per requirement.

Varnish paint is done to save the winding from short circuiting .

After Varnishing by VPI Plant, Motor is assembled & Final Checking takes place.

Now Motor is ready to use.

Contd...

VPI Plant(Cost-2.1 Lakh)24Javed Tazak

5.1 Basic Elements of TL Shop

5.2 Power Supply Scheme in Coaches

5.3 BLDC Fan

5.4 Batteries

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5.1 Basic Elements:

Brushless Alternator

Rectifier Cum Regulator Unit

Batteries

Fans

Wiring Section

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5.2 Power Supply Scheme in Coaches:

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5.3 BLDC Fan: Basic parts are Start Winding, Ball bearing, Fan Cap, Sensor Magnet, Rotor Magnet & PCB.

12 Year life against 10 year life of DC fan.

Wattage consumption is 32 W against 38 W of DC fan.

Highly Efficient, Noiseless and Reliable Operation.

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5.4 Batteries: An electrical battery consists of number chemical cells connected in series or parallel.

If the stored energy is inherently present in the chemical substances it is called a primary cell or non rechargeable cell. Eg- Zinc chlorine cell & Leclanche cell.

If the energy is induced in the chemical substances by applying an external source, it is called a secondary cell or rechargeable cell. Eg- Lead Acid Cell, Nickel Cadmium Cell, Nickel Iron Cell, Nickel Zinc cell etc.

PbO2 for positive plate, Pb for negative plate, Dilute Sulfuric Acid as electrolyte.

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Contd..

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http://www.nwr.indianrailways.gov.in

www.irieen.indainrailways.gov.in

https://en.wikipedia.org/wiki/North_Western_Railway_zone

BTC Jodhpur Railway Workshop

Technical Staff , Workers & Officers

http://www.irfca.org

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Summer Training was an excellent opportunity for me to get to experience the things that I would have never gained before.

I learnt the way of work in an organization, the importance of being punctual.

I have gained lots of knowledge .

I learnt how to do management practices and how to interact with fellow workers.

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