Over Voltage Protection Device

[JFYrineo]

I am trying to find out what others are using for an OVPD out there. I have a new Jab3300 Gen4 install on my SonexB. B&C doesn’t seem to have a current working solution. When I contacted Nick at Arion Aircraft to ask what Jab uses on their airplanes and his Arion Lightings with Jabs he said just the voltage regulator with a fuse on the main bus.

[n502pd]

What protection are you after, one that blows the fuse thats in line, or something else. I ask because, years and years ago, in my Triumph and BSA cycle days, they had a very large zener diode across the buss, and mounted on a big heatsink that would keep the buss voltage at a level that woild not hurt whatever was connected to the buss. the same principle might be applied here?

[JFYrineo]

The OVPD senses an over voltage situation out of the PM alternator and sends the current to ground by de-energizing the coil in the alternator relay