[PSUBS-MAILIST] DNVGL

Sean T. Stevenson via Personal_Submersibles personal_submersibles at psubs.org
Sat Oct 21 17:00:25 EDT 2017


I presume that even in the unlikely event of the double isolation failure which could create a short circuit current, that the DC mains are also protected as close as is feasible to the batteries by some manner of fuse or circuit breaker?

Sean

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-------- Original Message --------
On Oct 21, 2017, 14:02, River Dolfi via Personal_Submersibles wrote:

> Sean,
> An alarmed device to measure leakage to ground on all polarities is a requirement for DNVGL, recently made a requirement for ABS, and was original equipment on Pisces VI. Fortunately, it is an easy thing to implement.
>
> I understand that because negative and ground are separate that without a second fault on the negative side there will be no current flow, but why tempt fate? Maybe I'm thinking into this too much.
> -River J. Dolfi
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