Generator Coupling

Sajid khan

Senior Member
Posted this question in NEC forum before but haven't received much replies.

We have ordered a 150kVA prime rated generator. The generator is coupled by vendor on his own workshop. The engine is Perkins and alternator is leroy somer. The workshop of the vendor is'nt so big and i think they dont have much capability and precise tools for coupling.
I dont have any experience how to check coupling of generator..
What are the disadvantages of having improper coupling?

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Of more concern to me is -

Why are you using a vendor that you can't trust for such an expensive item?