209x Filetype PPT File size 0.78 MB Source: st2.indiarailinfo.com
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
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