Originally posted by wantomake
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New keyboard came in so now back to business.
Doing thoughts and reviews in my head this after noon, I had in mind what I said about the GDT and its purpose or non purpose. I assumed it had no purpose. Well one more time I was wrong.
I went back through the photos where it is shown in use and when I saw the photos I also remembered what the application of a GDT is for!
In a nut shell, in all circuits it's used as SAFETY protection devise. This means
that its use is NOT to connect parts of a circuit during NORMAL voltage values in the circuit but rather just the OPPOSITE ! In this case the mains circuit has a value of 120 to 124 volts. This would require that the GDT have a HIGHER value than that! The only higher next available GDT is rated at 150 V. Why would it be wanted for conduction to be at a higher voltage rate than the input could ever be?
It's really simple as the attachment photos show. Bear this in mind - the ground rods are in the GROUND. As such they are prone to LIGHTNING STRIKES! Way higher voltage that any of the components or loads on the circuit could handle.
The GDT is an instantaneous device that delivers the high voltage to the mains or inverter breaker and the GROUND FAULT CIRCUIT INTERRUPTER
Both of which DROP OUT ALL loads that are connected to the devise output.
Again , the attached photo show the circuit relation ship between GDT and
breaker and GFCI.
All of these things are circled in GREEN.
Thanks much J,
Clarence
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