INTRODUCTION
     ESTABLISHMENT
    >  Electric Loco Shed was set in 1976 by Railway     
    Electrification Organisation (8910 SQ. MTRS).
    >  It’s main purpose is of maintenance of 
         WAP1,WAP4,WAP5,WAP7 ,WAG5, WAM4 
    engines.
    INITIAL COST
    Rs. 1.5 (IN CRORES)
    PRESENT LOCO HOLDING
    185
  TYPES OF LOCOS HOLDING-
            [gauge] [power] [load] [series]
  1. WAP1  (Traction Motors: 4, 575kW ,18 coaches)
  2. WAP4  (Traction Motors- 6,630 kW, 750V, 26 coaches )
  3. WAP5  (Traction Motors-3phase squirrel-cage induction 
  motors(1150kW, 2180V).
  4. WAP7  (Traction Motors- 3phase squirrel-cage induction 
  motors(850 kW, 2180V).
  5. WAG5  (Haulage Capacity-2375t
  6. WAM4  (Traction Motors-6, 575kW, 750V, 
  Hauling capacity-2010t
             INTRODUCTION
  
   TRACTION
   Driving forward of vehicle is called traction and the system, 
   which employ this type of mechanism is called as traction 
   system.
   Classified broadly into two groups namely:
    1. Non Electric Traction System.
    2. Electric Traction System.
   >Electric Traction means a Locomotion in which  the 
   driving force is obtained from electric motors.
   >For Traction purpose 3-phase induction motor and DC   
   series motor are used and both have high starting torque 
   provide high speed acceleration.
      
                           
   TYPES OF ELECTRIC TRACTION SYSTEM
   DC Traction
   AC Traction
   DC TRACTION
   DC traction units uses direct current drawn from 
   overhead line.
   DC traction units uses  600v-750v DC voltage range .
   The low-voltage,series wound,direct current motor is 
   well suited to railroad traction,being  simple to construct 
   and easy to control.
    AC TRACTION
   AC Traction units draw alternating current from an 
   overhead line.
   Typical voltages used are-
   15kV /25kV AC,50Hz
   Fewer substations are required and the lighter overhead 
   current supply wire can be used.
   Reduced capital cost of electrification