And if it happens to ignite the arc there, it wont warm up or will cycle, as tge arc voltage of a 230V SBMV is way too high for a 120V OCV with a , mainly with resistive ballast (the filament...). But it really depends piece by piece, or even on the exact condition and a big contribution of pure randomness... 120V is just way too low to ignite a probe start MV...
120V SBMV need electrode to be heated up before the arc may ignite (that is, what the special filaments are doing within the arctube; plus there is a thermal starter switch in the outer to control that). Neither of this is needed for 230V, there just the auxiliary probe with its resistor, like in any other normal MV, is all what the 230V mains operation need (beside the ballasting resistor filament, of course)
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