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Autotransformer starting of Motors (28.5 KW,...)

Auto transformer is a very old and conventional and a very expensive starting method , which is used very rarely after the introduction of Soft starters / VSDs etc. 

On the small power motor it is really very costly to implement this method as the autotransformer is an expensive part and we can aachieve almost similar starting characterisitcs using Star-Delta option.  

For the ligher loads the componets need to be selected based on the current ratings.It could be an option to use the type 2 coordination table for star delta starter for selction pupose only, but please refrain from referring them as Coordination table for Auto transformer starting as they are not tested and validated and certified on Auto transformer.
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