Diesel Loco WDG4 (HINDI) (23. व्हील स्लिप )

13-01-2021
WDG-3A – सेफ्टी डिवाइस ( Safety Devices )
January 4, 2021

 Safety Devices  Safety devices are provided for the safety of the engine & loco. They are 1. Over Speed Trip Assembly (OSTA) - It is located on engine right side free end. It protects the engine from over speeding. On 8th notch the engine rpm is 1050. Due to any reason engine speed exceeds up to 1180 ± 20 rpm, OSTA will

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WDG-3A – मल्टीपल यूनिट ( Multiple Unit )
January 4, 2021

 Multiple Unit  When two or more locomotive are coupled mechanically, electrically and pneumatically with each other and controlled by a single loco pilot, it is called multiple unit. Procedure:  1. Check and engine start the locos individually before making multiple unit. 2. Adjust all the pressure related to break system. 3.

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WDG-3A – इंडीकेशन लैम्प सर्किट (Indication Lamp Circuit )
January 4, 2021

 Indication Lamp Circuit  This circuit is provided in the diesel loco to give warning/indication to loco pilot in case of any failure in various system/circuit , a LED (Light emitting diode) indication panel is provided on both control stand and control panel having following indication lamps - One electrical bell (ALG) provided

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WDG-3A – डायनमिक ब्रेकिंग (Dynamic Braking )
January 4, 2021

Dynamic Braking  It is an electrical brake, used only when loco is in motion. During dynamic braking, traction motor works as generator, hence retardation torque is developed on axle which opposes the movement of wheel and speed of loco is reduced. Advantages of dynamic braking 1. No wear and tear in brake block and wheels. 2. Speed

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WDG-3A – ट्रांजिशन ( Transition )
January 4, 2021

 Transition  Combination of traction motors are changed automatically on predetermined speed of Loco is called Transition. It is required to increase traction motor speed so that Loco speed can be increased. Back EMF of traction motor restrict Loco speed even on eighth notch. To increase speed Back EMF is controlled by following method

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WDG-3A – प्रप्लशन कंट्रोल सर्किट ( Propulsion Control Circuit )
January 4, 2021

 Propulsion Control Circuit  To move the locomotive, supply of Traction Alternator is send to traction motor through Power contactor, BKT, Reverser. This circuit is design to pickup above electro pneumatic contactor as and when require. In this circuit as per speed of locomotive two combination of traction motor are changed and during

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