400A is likely the absolute maximum rating for the FDS. Using a smaller fuse could be a simple way of derating the FDS dependant on load size.
But yes, as dpc says, ensure the fuse that has been fitted has been suitably selected.
Thanks everyone for the replies, much appreciated.
I kinda suspected that the forward voltage drop difference would have been the issue here.
I thought perhaps that if they were close enough then they would share but unequally, but it seems not to be the case here.
The thyristors did actually...
Good afternoon all,
I have a problem which has really melted my brain this afternoon and I am hoping someone can offer some insight.
My company had recently designed and built a three phase thyristor bridge rectifier for our customer.
One of our customers requests was that each thyristor had...
