Many alternator manufacturers use different winding configurations on there machines to get better performance for different applciations. Newage stamford have many different winding number. The below is not a full list, but they are the main ones that I have seen.
Winding 311
Standard 3 phase 380-415V Winding. used in most cases. Has 12 output ends.
Winding 312
Standard 3 Phase, 380~415V Wiinding, used on larger machines, has 6 output ends.
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