Hi
As part of a job I’m currently on I have connected a single phase supply to a Danfoss variable speed inverter drive. I wasn’t aware that this would be part of the job but there you go. Anyway I connected it and powered it up and a few seconds later it tripped the rcd. I informed the installers of the drive incase it was faulty but they said that it’s probably the wrong type of rcd. I researched the spec of the drive which says that I need a type B time delayed rcd. I spoke to Hager technical dept as these are the boards I have used and they said that they only do a 4 pole B type but not time delayed. There is an A type time delayed available which is double pole but they didn’t think that it would work as it doesn’t monitor dc which the B type does. These different types are new to me so would anyone have experience of them to offer some advice?
Thanks
