Someone near me has just had the same problem!! I've just measured the voltage on my (working) unit and both secondaries are showing 15V RMS with the drive powered but the motor static.

Suggest checking the rectifiers as well as the suggestions above. it looks like a long term overload causing heating rather than a short term 'bang' scenario.

Good luck!!

David


Quote Originally Posted by irving2008 View Post
OK, but still, are the secondaries series or parallel connected?

Other useful info I just found... the Lenze 530 series manual has this interesting pic:

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So we know it is an EI30 series and its 0.9VA... tho current EI30 are 0.6VA and 1VA, so I guess this might be a special. edit: or then again, maybe not; EI30-10.5 is 1VA or 0.9W for the 2x15 V: VB 1,0/2/15 from Farnell (alternate to Myrra)

Elsewhere in the manual it lists switching voltages for relay contacts as 20v so I'm going to hazard a guess this is a 15v secondary...