DIESEL LOCO – Transition Combination

January 5, 2021, 11:18 PM
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Transition Combination
 

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 –

 Increasing the voltage of traction motor:- This is possible in parallel combination. Axle generator is provided on L2 Axle box for automatic transition, it gives supply to TR panel. This panel has card No. 210 & 207. All cards should be fixed properly otherwise transition will not take place.

Transition chart – 

 
 

Note-

1. Reverse transition comes at 3kmph less speed than forward transition speed.

2. Reduce one notch to avoid OSTA tripping at the time of transition.

 
 
 

 

 

 
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