24v transformer

[leffe blonde]

hi gu, need a bit of advice,i have three phase input to machine one leg feeding primary winding of the tranny, out put 24v feeds electronic board, the neutral in supply came loose the other day and the primary windings went o/c,i am assuming because the neutral went down we received higher voltage at the tranny, and dammaged it , would that be correct, cheers leffe

[Brian_UK]

It could well have been an electrical spike hit the windings as the neutral came loose.

[Quality]

As brian said a spike is probably what caused the tranny to fail the more likley reason being that as arcing / intermitent connection with the neutral occured this would have caused several / many high inrush currents into the tranny causing the smaal winding to ultimatley fail electricaly

[leffe blonde]

hi brian, thanks for the speeedy reply, i should also have said that i have experienced something like this on three or four occasions,each time i have found problems with the neutral, a colleague of mine whilst wiring up a 3phase machine had not connected the neutral,within minutes the 24v tranny burnt out,

[Brian_UK]

There you go, tell him to read the F....g manual next time ;)