My 3000kw Quattro II trips the output 80 amp ELCB breaker when I turn on any AC unit on my boat (three of the 4 have soft starts). The breaker doesn’t trip when I use the microwave, coffee maker etc. only the AC units.
Any help is much appreciated.
Ed
If i googled correctly, then an ELCB is an older type of RCD/GFCI, or maybe the same thing but just a different name for it.
Since it trips, this means that a high enough leakage current is flowing. Finding the cause of this can be quite tricky. Try to disconnect as many things as possible and try again with an AC unit. The idea is to figure out which device exactly lets it trip.
The tricky part is, it can be a combination of devices. An RCD is usually rated at 30mA, so it can in reality trip anywhere from 15mA to 30mA. There could be five devices that each leak 2mA, and the AC unit once it turns on leaks 10mA, totalling to 20mA which could cause a trip. Each device alone however works fine.
If you cant find a combination or a clear answer to which device exactly is the issue here, then an electrician should measure isolation resistances andearth leakage currents on site
Thank you for your help.
Getting an electrician to show up is another problem.