[PSUBS-MAILIST] wiring problem

[hank pronk via Personal_Submersibles]

Alan,It worked before?  the only difference is the sub is not the ground anymore.  The radio breaker trips when I turn the radio on, when I disconnect the compressor ground, the radio is fine.  Hank 

    On Wednesday, June 8, 2016 5:01 PM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
 

 Hank,is the compressor on when it is doing this?If not, & you are just attaching the terminals to the battery, possibly it has to do with the input capacitors on the compressor motor controller drawinglarge amounts of current.On my Kelly controller it specifies the use of a pre-charge resistor to chargeup the capacitors so that there is not a large in-rush of current that causesarcing on the switch or damages sensitive electronics.In my test system for my motor I have a circuit breaker that I close & this sendspower through the pre-charge resistor, which is wired across the switch terminals.Then I turn the main switch on.You could try attaching a resistor across the compressor to battery connection(on the positive terminal) before attaching the compressor wire. If this workedit would indicate the problem. I use a 1k ohm 10W resistor.I am not the smartest with electronics but this may be helpful if no oneelse answers.Cheers Alan

      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Thursday, June 9, 2016 10:12 AM
 Subject: [PSUBS-MAILIST] wiring problem
  
Today I was doing some final wiring and discovered if my hp compressor has the ground wire on it,  my acoustic radio  trips the breaker.  What the bleep is going on?  Nothing is grounded to the hull anymore.    I am taking 24V off a 36V bank for the compressor and the Radio is also taking 24V from the same source.  Hank
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