OLE Engineering


    Overhead arrangement to transmit electrical energy to trains, trams, trolley busses are variously
    known as............

  • Overhead catenary system (OCS)
  • Over head line (OHE)
  • Over head line equipment (OLE/ OHLE)
  • Over head wiring (OHW)
  • Over head line (OHL)
  • Trolley wire

by Kálmán Kandó in Ganz Company,Hungary.
 
India's first section electrified on the 25 kV 
AC system was Raj Kharswan–Dongoaposi, Chakradharpur Division, South Eastern Railway, Jharkhand in 1960
                            











   Rail:-




Cross over:- 

Introduction on Feeding arrangement:- 

 

  

                


Different Systems for Railway Electrification:- 

1.      DC Traction (1500V / 3000V)
2.      3rd Rail (750V DC)
3.      1x25kV System
4.      1x25kV System with BT/RC
5.      2x25kV System (with Auto transformer)


1x25kV System:-



·        Inductive interference
·        Conductive interference
·        Stray currents
·        Voltage drop issues




1x25kV System with BT/RC:-


·        Negligible Inductive interference
·        Less Conductive interference
·        Increases line impedance
·        Interruptions in Catenary
·        System with BT but no RC



2x25kV System (with Auto transformer):-

·        Addresses voltage drop problems
·        Tap changing auto transformers
·        Has the advantages of the simple and BT/RC systems
o   No breaks in catenary
o   Reduces interference issues





 



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