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In this system diesel engine is used as a prime mover which is coupled with a generator that produce electricity. Generally, thihs is DC generator but alternator is also used nowdays. This power supply is feed to the traction motor and other electrical appliances.
This is self-contained type traction system and it is economical

• It require less maintenance as compared to steam locomotive.
• there is no interference with communication line.
• It is self-contained unit so it can be operated on any route
• It’s overall efficiency is about 50%

• High initial cost.
• Regenerative breaking is not possible.
• Life of diesel engine is comparatively low.
• Diesel engine require more maintenance.


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