S
stu1979uk
Hi,
I have recently moved over to the marine side of the industry which has some very noticable differences. The main one is that we have 2 phases each at 110v and together giving 230v ie no neutral involved. The other is that an earth fault does not trip an MCB only a short circuit ie phase to phase will trip the protective device. (seperate system for earth faults)
So I'm working on a panel and see single pole circuit breakers, if one MCB trips we still have a live feed on the circuit. The simply answer of fitting a 2 pole MCB (which is standard on the vesell) solves the issue.
Then I see double fuse carriers. If one fuse trips the other will still be feeding the circuit with 110v.
Now I would think (but not 100% sure) that one of the fuses would blow, ie the feed and the other may not, ie the return.
So before I go and open a can of worms here, does anyone have any experience/comments on this type of system?
Thanks,
Stuart
I have recently moved over to the marine side of the industry which has some very noticable differences. The main one is that we have 2 phases each at 110v and together giving 230v ie no neutral involved. The other is that an earth fault does not trip an MCB only a short circuit ie phase to phase will trip the protective device. (seperate system for earth faults)
So I'm working on a panel and see single pole circuit breakers, if one MCB trips we still have a live feed on the circuit. The simply answer of fitting a 2 pole MCB (which is standard on the vesell) solves the issue.
Then I see double fuse carriers. If one fuse trips the other will still be feeding the circuit with 110v.
Now I would think (but not 100% sure) that one of the fuses would blow, ie the feed and the other may not, ie the return.
So before I go and open a can of worms here, does anyone have any experience/comments on this type of system?
Thanks,
Stuart