[PSUBS-MAILIST] Motor Protection

[Alec Smyth via Personal_Submersibles]

ABS says you should protect both positive and negative.

"Circuits are to be protected from overloads and short circuits by
protective devices which open all conductors. These protective devices are
to be circuit breakers, except fuses may be used for immersion heaters and
where overcurrent devices are inaccessible during normal operations.
Essential and emergency circuits are to be provided with short circuit
relays that can be reset."

I find it useful to have these resettable dual-pole breakers right in front
of me, because they're an easy way of ensuring there is no power to the
thrusters when anyone is swimming near the sub. The actual throttle
controls are quite easy to trigger accidentally.

Best,
Alec

On Tue, May 21, 2024 at 7:15 AM Jon Wallace via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hey gang, I'm curious what the general consensus is regarding fuse/breaker
> protection on both pos/neg legs of the propulsion motor or if protection on
> just the positive side is enough.
>
> Jon
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