Be aware that if a galvanic isolator doesn't have a capacitor across the diodes, the diodes can be easily biased into conduction by AC leakage on dock ground wiring, which now will pass DC current along with the AC. This defeats the purpose of the isolator.
The ABYC has required the caps on isolators for several years now. They also require the isolators to be either fail-safe or self-monitoring for fault conditions which just might save your butt some day.
-Tom
--- In electricboats@yahoogroups.com, Arby bernt <arbybernt@...> wrote:
>
> Looking up "bridge rectifier galvanic isolation" I came across the following:
>
> http://quinco.net.au/Library/GalvanicIsolatorDIYAssy.pdf
>
>
> The DIY solution...
>
> Arby
>
>
> ________________________________
> From: Matthew Geier <matthew@...>
> To: electricboats@yahoogroups.com
> Sent: Tuesday, July 23, 2013 2:48 PM
> Subject: Re: [Electric Boats] proper grounding for electric yachts
>
>
>
> Â
>
> You can get devices called 'earth clamps' that are normally open circuit
> but prevent a high potential difference by 'firing' and shorting it out.
>
> I wonder if some similar system is available in the marine environment
> that can be used to ensure the various 'grounds' can't get a dangerous
> level of potential between them, but normally keeps them isolated.
>
| Reply via web post | Reply to sender | Reply to group | Start a New Topic | Messages in this topic (11) |
No comments:
Post a Comment