[PSUBS-MAILIST] oil filled relays

[k6fee via Personal_Submersibles]

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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