If my crowbar overvoltage opens the B+ circuit, there's NO current flowing out of the alternator.  Absent current, there can be no heat generated.  The field can go to max output, there will be high voltage at the B+ terminal, but no heat generated.  Sounds to me like a bogus concern.  I think the key issue is "... Nuckolls expressed dislike ..." and no further support is "needed".

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Jim, I've been flying unprotected but thinking I really need to something for safety sake. Ordered one of Nuckolls OVM-14's and planned to put it in with a B+ line contactor. Now you have me thinking that I may introduce more failure modes than I had before. I am a real advocate of KISS systems.

 

Do you or anyone else on the list know what happens to recombinant gas batteries like the Odessey do when they are overcharged by say the 16-18 volts that you think happens when the alternator regulator fails??

 

Bernie