Perhaps a rather rudimentary question but what is “full mode” protection? I assume that it is a combination of common and differential modes but it seems to me that it is generally common mode that is provided.
Well in the CT2 arrangement, if the L-N device fails, the fuse will disconnect, If the N-E device fails, no dangerous voltage should be exposed, or at least a lot less than if there was an L-E on that failed.
Generally like all semiconductors after failure , the solid state transorb devices become a low resistance - Gas discharge devices normally do not, as when they finally fail the electrodes inside melt and fall off, or the case cracks and the gas escapes. Gas devices need the volltage to fall to near zero for the arc to go out, so can only be used L- anything with a fuse in series.
Well in the CT2 arrangement, if the L-N device fails, the fuse will disconnect, If the N-E device fails, no dangerous voltage should be exposed, or at least a lot less than if there was an L-E on that failed.
Generally like all semiconductors after failure , the solid state transorb devices become a low resistance - Gas discharge devices normally do not, as when they finally fail the electrodes inside melt and fall off, or the case cracks and the gas escapes. Gas devices need the volltage to fall to near zero for the arc to go out, so can only be used L- anything with a fuse in series.
