<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body>Hank, normally, yes, but when surrounded by cold lake water no. You cam mount them to a heat sink and still pot them.<div><br></div><div>Keith T.</div><div><br></div><div style="font-size:100%;color:#000000"><!-- originalMessage --><div>-------- Original message --------</div><div>From: hank pronk via Personal_Submersibles <personal_submersibles@psubs.org> </div><div>Date: 7/10/18 4:35 AM (GMT-08:00) </div><div>To: k6fee via Personal_Submersibles <personal_submersibles@psubs.org> </div><div>Subject: Re: [PSUBS-MAILIST] oil filled relays </div><div><br></div></div><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div></div>
<div>Keith,</div><div>I would have thought the potting would cause overheating? </div><div>Hank</div><div><br></div><div><br></div>
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On Monday, July 9, 2018, 8:56:22 PM MDT, k6fee via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div id="yiv1130875560"><div>Hank,<div><br clear="none"></div><div>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.</div><div><br clear="none"></div><div>Keith T.</div><div><br clear="none"></div><div class="yiv1130875560yqt7824319260" id="yiv1130875560yqt58155"><div style="font-size:100%;color:#000000;"><div>-------- Original message --------</div><div>From: hank pronk via Personal_Submersibles <personal_submersibles@psubs.org> </div><div>Date: 7/9/18 6:58 PM (GMT-08:00) </div><div>To: River Dolfi via Personal_Submersibles <personal_submersibles@psubs.org> </div><div>Subject: Re: [PSUBS-MAILIST] oil filled relays </div><div><br clear="none"></div></div><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div></div>
<div>Hi River,</div><div>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. </div><div>Hank</div><div><br clear="none"></div>
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On Monday, July 9, 2018, 7:01:15 AM MDT, River Dolfi via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div id="yiv1130875560"><div dir="ltr">Hank,<div>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.</div><div><br clear="none"></div><div>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.</div><div><br clear="none"></div><div>What do you plan on using for thrusters? Minn Kotas? and what voltage do you think you'll run?</div><div><br clear="none"></div><div><br clear="all"><div><div class="yiv1130875560gmail_signature"><div dir="ltr"><div>Thanks,</div><div><br clear="none"></div><div dir="ltr">-River J. Dolfi<div><br clear="none"></div></div></div></div></div>
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