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Old 03-11-2017, 19:13   #1
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"fail safe" Ground Isolators... is unmonitored really safe?

My ProMariner monitored 30 ProSafe1 monitor system has died. I spoke with their service department and they simply said its obsolete, buy a "Fail Safe" unit. The GI tests good with a diode tester.

So maybe I am missing something here. If I buy a "Fail Safe" unit and it "Fails" I will never know it. So while my ground to shore will be intact, I will not have any galvanic protection.
So to know it is alive and well, I would have to disconnect the shorepower, crawl back into the stern of the boat (NOT easy) to my GI, disconnect both sides of the GI and test it with a diode tester. Is that right?

And to top it all off, I have a 1-1/4" hole in my teak panel that needs to be covered. Anyone want to sell their old ProSafe1 30 monitor?
Jim
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Old 03-11-2017, 20:09   #2
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Re: "fail safe" Ground Isolators... is unmonitored really safe?

ABYC A-28 Galvanic Isolators, requires the use of a fail safe type but also requires .....

28.6.1 The galvanic isolator shall be equipped with an integral or external status monitor that provides an audible or visual indication of failure.

So purchase a new unit with both such features or buy new remote monitor.
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Old 03-11-2017, 20:19   #3
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Re: "fail safe" Ground Isolators... is unmonitored really safe?

Quote:
Originally Posted by boatpoker View Post
ABYC A-28 Galvanic Isolators, requires the use of a fail safe type but also requires .....

28.6.1 The galvanic isolator shall be equipped with an integral or external status monitor that provides an audible or visual indication of failure.

So purchase a new unit with both such features.
Can you name one in a 30A format with a monitor? I haven't found one.
Service tech at ProMariner (Though I doubt an ABYC cetified tech) says that with the fail safe there is NO requirement any longer for monitoring.
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Old 05-11-2017, 15:46   #4
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Re: "fail safe" Ground Isolators... is unmonitored really safe?

Can I make a simple monitor that will tell me with a green light that the isolator is working and a red light to say no it has failed?
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Old 12-11-2017, 05:06   #5
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Re: "fail safe" Ground Isolators... is unmonitored really safe?

I feel bad "Bumping" a regular post, but I really need some help on this one.
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Old 12-11-2017, 15:50   #6
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Re: "fail safe" Ground Isolators... is unmonitored really safe?

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Originally Posted by boatpoker View Post
ABYC A-28 Galvanic Isolators, requires the use of a fail safe type but also requires .....

28.6.1 The galvanic isolator shall be equipped with an integral or external status monitor that provides an audible or visual indication of failure.

So purchase a new unit with both such features or buy new remote monitor.
I don't have the standard in front of me, but I'm pretty sure you'll find an exception that says a failsafe isolator does not require a status monitor. None of the current generation isolator have monitoring...
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Old 12-11-2017, 16:34   #7
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Re: "fail safe" Ground Isolators... is unmonitored really safe?

Are these units gas-filled spark gaps? They are an open circuit to prevent corrosive current flow until lightning hits when they conduct? Or are they something else?
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