SUBMITTED BY : Sanjay SharmaROLL NO. : 10/EE/2744

HINDU COLLEGE OF ENGINEERING

NORTHERN RAILWAYS-ELECTRIC LOCOMOTIVE SHED

TUGHLAKABADH.

HISTORY OF INDIAN RAILWAYS

Indian Railways, abbreviated as IR, is the state-owned railway company of India, Which owns and operates most of the country's rail transport. It is overseen by the Ministry of Railways of the Government of India.

16th April 1853............The beginning

INDIAN LOCOMOTIVE

INDIAN RAILWAY fleet consists electric and diesel engines. Steam engines are no longer used, except for heritage trains . Engines are called “locos”.

IMPORTANT COMPONENTS OF LOCOS

ROTARY EQUIPMENTS

The various rotary equipments in a loco are as follows: Traction motor (TM) Arno converter AUXILIARIES-Cooling blowers for TM, transformer oil

cooler Main compressor Auxiliary compressor

PANTOGRAPHThe loco uses a pantograph, a metal structure which can be raised or lowered,

to make contact with the overhead contact cable and draw electricity from it to power its motors.

Usually it goes first through a transformer and not directly to the motors

PANTOGRAPH

TRACTION MOTORTraction motors typically refers to those motors that are used to drive the power wheels of a rail road locomotive, electrical multi train.

The traction motor is connected to the gear box.

Traction motors are the DC series motors usually running on approximately at 600 Volts.

TM is fitted on the axle and drives the wheel of the loco, thus is one of the most important rotary equipment.

ARNO CONVERTER

ARNO CONVERTER

ARNO CONVERTER

It converts single phase supply to three phase supply.

This three phase supply is used for running auxiliary equipments like blowers and compressors.

MAIN TRANSFORMER

The locomotive is equipped with a main transformer.

The main transformer converts the overhead line voltage (25kV) to the lower operating voltages.

It steps down the voltage from 25 kV to 782 V.

Mostly 5400 to 6500 kva transformers are used for locomotives.

MAIN TRANSFORMER

TAP-CHANGERThe tap –changer is provided on the high-tension side of the transformer which reduces its size due to the lower current.

categories – namely off load and on load.

In traction only on-load tap changers (OLTC) are used.

Off-load tap changers cannot be operated while current is flowing in the circuit. It contains the 32 taps.

They are capable of changing the taps rapidly without interrupting the flow of current.

TAP-CHANGER

RELAYS

A relay is an electrically operated switch. Current flowing through the coil of the relay creates a magnetic field which attracts a lever and changes the switch contacts.

The coil current can be on or off so relays have two switch positions and they are double throw (changeover) switches.

RELAYS

Electric locos need compressed at a pressure ranging from 6 kg/cm2 to 10 kg/cm2. Compressed air is used for the loco's own air brake system as also for the train brakes, for raising the pantograph, for operating the power switchgear inside the loco

AIR COMPRESSORS

THANK YOU