Posted by Mark [184.108.40.206] on Wednesday, March 25, 2020 at 16:16:26 :
In Reply to: Re: How to bench test the voltage limiter posted by Mark [220.127.116.11] on Wednesday, March 25, 2020 at 15:01:18 :
so to answer my own questions...
1. Yes, the body of the limiter has to be grounded so the heating coil draws a current to heat the bimetallic strip.
2. No, there doesn't need to be a load. The output voltage is regulated by a bimetallic strip that heats and cools cycling the output on and off causing a chopped DC output that averages somewhere around 5V.
My disassembled voltage limiter had a burned up heating coil causing the points to remain closed all the time and thus passing 12V continuously to the output terminal. I read somewhere that these guages are rated for 6V.
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