yeah there are few size you can use but what size starter you have it is #2 or #3 starter size because the reason why i asked here because those size starter they dont use the same size coil they will useally rated in X of VA
but i can give you a rough idea the control transfomer size
120X240 volt primary with 24 volt secondary with 24 volt coil which it very common with alot of the motor starter used this
the typical size useally about 150 VA size for #2 and smaller but for #3 and larger i useally bump up to 200 VA for it due the coil size
or other option you can do is have 240v primary transformer with 120v secondarly volt and use the stock 120 v coil
those two options you can do
if you add the control transformer IMO it will be wise idea to add a fuse to this as well
Merci , Marc
