VFD (?) tripping RCD

[NB70]

Jonathan,

there's been discussion about this recently on the EMC2 mailing list - something to do with filters in the VFD providing a path to earth - which then trips the RCD. So it might not be a fault per se, just the way the VFD is designed to work. I know Andy Pugh and others experienced this issue (and hopefully solved it). He frequents the EMC2 forum - it might be worth asking a question over there:

Link: EMC2 forums

Nathan

Sorry Jonathan just re-read your post properly - since your set up was working fine for a year this is unlikely to be the cause