[PSUBS-MAILIST] oil filled relays

[Sean T. Stevenson via Personal_Submersibles]

https://www.mgchemicals.com/products/potting-compounds/epoxy-potting-compounds/832tc-thermally-conductive-epoxy

Sean

-------- Original Message --------
On Jul 10, 2018, 09:07, k6fee via Personal_Submersibles wrote:

> Hank, normally, yes, but when surrounded by cold lake water no. You cam mount them to a heat sink and still pot them.
>
> Keith T.
>
> -------- Original message --------
> From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
> Date: 7/10/18 4:35 AM (GMT-08:00)
> To: k6fee via Personal_Submersibles <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] oil filled relays
>
> Keith,
> I would have thought the potting would cause overheating?
> Hank
>
> On Monday, July 9, 2018, 8:56:22 PM MDT, k6fee via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> Hank,
>
> I'd go with solid state relays and pot them in epoxy. No compensation needed and no moving or exposed parts to wear/ arc out.
>
> Keith T.
>
> -------- Original message --------
> From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
> Date: 7/9/18 6:58 PM (GMT-08:00)
> To: River Dolfi via Personal_Submersibles <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] oil filled relays
>
> Hi River,
> Thanks', that is what I was wondering about.  I am worried the contacts will burn the oil and make them less reliable.  I do like the cooling effect though.  I am using 50 amp 12 V trolling motors.
> Hank
>
> On Monday, July 9, 2018, 7:01:15 AM MDT, River Dolfi via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> Hank,
> Alvin used to use oil compensated relays back in the 70's. They had a transformer oil specially mixed for by Hoover vacuum cleaners. They apparently had a hell of a time, because carbon nodules would build up on the contacts and gum up the works.
>
> They ditched all of that sometime in the 80's when they went to brushless thrusters and now keep all of the high-power electronics in a titanium enclosure.
>
> What do you plan on using for thrusters? Minn Kotas? and what voltage do you think you'll run?
>
> Thanks,
>
> -River J. Dolfi
>
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