Tesl,These VFD'S have been in service for 15yrs and are factory built units in Modle 6 Square d MCC'S.I know how to test SCR's and am factory trained on Banshaw drives.There is also no fusing after the output the fused disconnect is of couse part of the combonation starter(drive)and provides short circuit protection.Thanks the girls think im cute to but regardless of that fact I know how to test across scr's and the event recorder has also recorded the fault.On a side note Banshaws are very well known to fail in this way in fact shorted scr's are the prominant fault when they fail which is a rare.
Last edited by frank; 05/06/14 04:54 AM.
