Types of PANTOGRAPH

Its a seminar given by me on the Type of pantograph ! I hope if someone needs it !

1. Industrial Training at Kurla Carshed RN : 13214

2. INTRODUCTION

3. Basic Knowledge of ‘EMU’ An EMU consists of 4 or 5 units. A unit comprises of 3 coaches. So there are 12 and 15 coaches EMU running in Mumbai. The vehicle is equipped with a state-of-the-art three-phase drive with asynchronous Motor Types.

4. There are two types of Basic Unit: End Basic Unit Middle Basic Unit

5. End Basic Unit Motor Coach (MC) Driving Trailer Coach (DTC) Trailer Coach (TC)

6. Middle Basic Unit Motor Coach (MC) Non-Driving Trailer Coach (NDTC) Trailer Coach (TC)

7. Major Equipments of DTC

8. Control Technology There are two Central Control Units (CCU). The Units are connected to each other via an MVB Bus. If the MVB bus is not available despite of this fallback, the vehicle can be operated in degraded operation via the rescue drive mode. All the switches , buttons and devices are connected to a KLIP station

9. Diagnostic Display Support The MMI (Man-Machine Interface) is installed in the driver's cab in the DTC. The states of functions are indicated to the driver by means of coloured icons. Automatic vigilance device has been implemented via the master controller. In rescue drive mode, the automatic application of the brakes is immediately initiated.

10. Pantograph

11. Types of Pantograph : Diamond Shape – For DC rakes. Bow Type – For AC/DC rakes. There are two types of Bow used : Schunk metal & carbon India ltd - used in Siemens rake only. Stone India ltd - used in Siemens rake & BHEL rakes

12. Stone India ltd Pantograph

13. The Pantograph has three articulations : 1.Lower Articulation 2.Middle Articulation 3.Upper Articulation LOWER ARTICULATION It contains : Base Frame Main Springs Lower Arm Yoke Assembly Push rod Assembly

14. Base Frame Base Frame Insulators

15. Main Springs

16. Lower Arm Assembly Middle Articulation Assembly Lower Arm Pedestal Horizontal Spindle

17. Yoke Assembly Yoke Assembly

18. Push Rod Assembly Push Rod

19. MIDDLE ARTICULATION CENTRE SWING LINK

20. UPPER ARTICULATION Upper Articulation contains : 1. Bow suspension assembly 2. Transverse tube assembly 3. Upper distance piece 4. Steady tube

21. Bow Suspension Assembly

22. Transverse tube Assembly

23. Upper Distance Piece and Steady Tube Assembly Upper Distance Piece Steady Tube

24. YOKE ASSEMBLY COPPER SHUNTS RUBBERIZED THRUST BLOCK(BUFFER) MAIN SPRINGS Lower Arm PUSH ROD SLOTTED BAR HORIZONTAL SPINDLE UPPER FRAME MIDDLE ARTICULATION ASSEMBLY

25. Operation In it’s lowered position the main Springs are extended by pulling the lower arm rotation by servomotor and its insulator mechanism assembly. When its tension is released the pantograph raises .

26. Raising  : When the compressed air is admitted into the air motor cylinder  The cylinder piston compresses the holding down spring inside the air motor  It displaces the slotted bar then permits the rotation of the horizontal spindle of the lower arm under the action of the working springs.  Thus the pantograph raises until collector head reaches the overhead wire.  The pantograph balance is maintained through the working of the main springs slotted bar insulator MECHANICAL ASSEMBLY HOLDING DOWN SPRING air motor cylinder Piston rod

27. Lowering  :  Releasing the compressed air in the cylinder causes the piston to return under the action of the holding springs.  The slotted link pulls the horizontal spindle and lowers the pantograph.  Air pressure required for complete extension of the piston rod will be 5 kg/cm2.  Graphite grease is applied on the pan for smooth operation

28. Static Adjustment  : The static load of the pantograph is the load applied by the pantograph on the contact wire. The load must be as constant as possible through out the entire contact range 0.5 to 2.0m of the pantograph. It is adjusted by four static screws. 1.5m 1.0m 1.75m 0.5m

29. Transverse flexibility of the pantograph  :  Raise the pantograph to a height of 1.5m  Pull the upper articulation transversely with a force of 50 kg weight suspended on a rope passing over a pulley.  The displacement of the bow should be 36 mm + 5mm.

30. Datas  :  Width of the pan : 1800/2032 + 10 mm  Weight of the panto without insulators : 230kg  Current collector strip material : Electrolyte copper  Nominal Voltage : 25 KV AC/1500 V DC  Nominal Current : 60/1100Amps  Raising time/Lowering time : 5 Sec.  Thickness of copper strip : 6.35mm  No. Of strips per pan : 8 Nos.  Condemned size normal : 3 mm  Monsoon : 4mm  Maximum Height on release position : 2490 m SIL PANTOGRAPH BEARING  YOKE ASSEMBLBAY : 06 nos. UPPER ARTICULATION : 02 nos LOWER ARTICULATION : 02 nos PUSHROD ASSEMBLY : 02 nos MIDDLE ARTICULATION : 02 nos TOTAL NO. OF BEARING : 14nos

31. Schunk Pantograph

32. Parts of Schunk Pantograph Base Frame Lower Frame Upper Frame Air Bellow Coupling Rod Hydraulic Damper Cam disks with rope wire Parallel guide bar Pneumatic control box Diagonal rod Apex tube Rocker box Bow Assembly

33. Base Frame Resting buffer Base Bearing Spring Support

34. Lower Fr ame Hydraulic Damper Cam Cable rope

35. Upper Frame Coupling Rod Bearing Blocks

36. Air bellow Cable guide Air bellow Bellow cover Air inlet

37. Coupling Rod

38. Parallel guide bar

39. Hydraulic Damper

40. Pneumatic control filter Pressure regulator Safety valve 1 3/2 way valve Safety valve 2 Throttle valve

41. Diagonal Rod Diagonal Rod

42. Rocker Box Spring support Leaf Spring Collector strip support Rocker suspension

43. Apex Tube

44. Datas :  Width of the pan : 2032 + 10 mm  Total Weight of the panto with insulators : 150kg( appx .)  Current collector strip material : Electrolyte Cu.  Nominal Voltage : 25 KV AC/1500 V DC  Nominal Current : 60/1100Amps  Raising time/Lowering time : 10 Sec.  Thickness of copper strip : 6.35mm  No. Of strips per pan : 07Nos.  Condemned size normal : 3 mm  Monsoon : 4mm  Total length in resting position : 2370 mm. + 10 mm.  Maximum extension position : 2400 + 10 mm.  Minimum height with insulator : 575 + 10 mm.  Frame insulators : 25 KV ,4nos.  Insulator Height : 363 mm.  Maximum speed under healthy OHE wire : 160 KMPH  Air pressure for continuous operation : 7 bar