I had in mind using the small, sealed 18v or 75v gas discharge spark tubes as output spark gap protection for 55v transistors of DC main circuit, along with Varactor unit 40V DC, along with "extra" protection open spark gap set for 750 volts. Three of these across the output of ISOLATED type transformer power supply with 2kv bridge rectification. Ferrite core has windings on opposite sides core, over rubber. . (No string series diodes that causes needed way higher input voltage) Transistors have reverse parallel diodes 50v. Would these 3 protections work successfully in parallel, for power supply protection from recurring, pulsing on + off HIGH VOLTAGE? Construction set up comments needed. Thanks.

 

It seems like the TS is planing on having three different forms of over-voltage protection in parallel. What is not mentioned is if these would be connected across the input of the power supply or the output. If the supply voltage is designed to be 50 volts, how would a 750 volt spark gap provide protection??
A gas discharge tube always needs a circuit protection device because when it is triggered to conduct it continues to conduct until the power is removed.
REally, the request does not make much sense at all.

 

We need to know what the overall project is supposed to accomplish before You start talking about
how to protect it from over-Voltage spikes, which may never happen.

The application specifics may make all the difference in the World.
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