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Unfortunately not related to my comment. Did you read EC640 at all? It's discussing industry standard staggered protection ("hybrid surge protection") rather than series circuit.Search " EC-640 combining gdt and mov -littelfuse". Hopefully this will help in your decision making.
Thanks, one reason for it is as kindly given by Kajunbee in post #12.Unless you show a substantiated reference for GDT + MOV series circuit application, I prefer to consider it as a useless design idea.
Thanks, do you mean that we need something like this to add in?...ie, the first post of this...I feel the missing link in your design is something to absorb the transient rather than trying to clamp the power station output.
The series GDT/MOV makes no sense.
The surge source is the energy in the stray inductance of the mains wiring......there is much energy stored in such wiring after say a high power piece of equipment has had a short circuit, and then blown a fuse......the fault current puts 100's of amps in the stray inductance of the mains, and this energy is what the mov will absorb..since one cannot break an inductive current...as you know, it is pointless to make the input filter resistive enough to be able to dissipate the surge current, -if it was that resistive it would be too lossy....the mov/gdt/tvs has to quench virtually all of it.This advantage relies on the assumption that the surge source has some impedance,
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