2 Railway Employee

DIESEL LOCO – ENGINE GOVERNOR

05-01-2021

ENGINE GOVERNOR It is located on engine right side at power take off end. Its main work is to keep engine RPM stable as per throttle notch position irrespective of load and road. It also work the following 1. Controls fuel oil supply 2. Co-ordinate between main generator and diesel engine HP. 3. Brought engine speed to idle or shut down when any safety device operates. 4. Helps in engine starting and stopping Three types of governor are used in Diesel locomotive. 1. Electro Hydraulic Governor (EH) 2. Wood Ward Governor (WW) 3. Microprocessor Control Based Governor (MCBG) Electro Hydraulic Governor (EH) – Main parts are Pilot valve assembly

ACT (RS) ABB Loco (English) (14. HOW TO ENERGISE THE LOCO)

January 10, 2021

How To Energies The Loco 1.Check the machine room and cubicle HB1/2,SB1/2 and pneumatic panel and ensure that all Circuit breakers, rotating switches and cock at Pn. Panel are at Normal position and ensure that key ‘IG-38’ is provided on pneumatic panel. Also ensure that panto selector switch is at normal position. 2 compartment

ACT (RS) ABB Loco (English) (13. HARMONIC FILTTER)

January 10, 2021

Harmonic Filter Line harmonic filter is connected with primary winding of main transformer which consist of resistances and capacitor. This harmonic filter reduces/suppressed the high frequency harmonics to avoid disturbances in signaling. If the harmonic filter get bypassed by the system, the speed of the loco / train will be automatically

ACT (RS) ABB Loco (English) (11. TRACTION POWER CIRCUIT)

January 10, 2021

Traction Power Circuit ( WAG-9 & WAP-7) Traction Power Circuit: Power from the overhead Catenary is directed to the main transformer, mounted on the locomotive under frame, via the pantograph. The traction circuit is split into two separate circuits after the main transformer. The traction converters can

ACT (RS) ABB Loco (English) (10. MAIN TRANSFORMER )

January 10, 2021

Main Transformer General: 25 KV, 1-phase, AC Supply is taken from OHE catenary/ contact wire through pantograph, roof equipment and VCB (DJ). The same supply is fed to charge the “ parallel induction transformer” where it is stepped down to different operating voltage. . The tank is filled with transformer oil: • In

ACT (RS) ABB Loco (English) (8. PANTO & MCPA)

January 10, 2021

Pantograph Two pantographs are provided on either end of loco. Design of pantograph is same as other AC locos. For raising and lowering of pantograph one switch ‘ZPT’ is provided on panel ‘A’ having 3 positions, UP , Off and DOWN. When we press switch down ward (i.e. position UP) and release - panto will up. When we

ACT (RS) ABB Loco (English) (9. POTENTIAL TRANSFORMER)

January 10, 2021

TRACTION POWER Potential transformer-.The primary voltage transformer is situated on the converter roof hatch and attached to the pantograph via the roofline. The primary voltage transformer reduces the catenary voltage, approximately 25 KV, to 200 volts AC. A resistor is placed across the primary voltage TFP to provide a reference load.

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