Incidentally, due entirely to my poor description, I may have implied that we do in fact sometimes depend on ground paths through breakers, but that is not the case what I meant by 'grounding through a breaker' is a specific procedure for either the application to, or removal of working grounds from, high voltage circuits in corridors with a high degree of induced circulating current where specialized grounding switches as described by cuky2000 have either not been installed or are unavailable.

Previous to very recently, the position of all of our SF6 switchgear could be visually confirmed either by eye and flashlight through viewing ports, periscopes with prisms, or, more recently, by means of closed circuit battery powered cameras and LCD screens mounted on lightweight poles.Īt our very latest SF6 station however individual cameras have been mounted for each in-line or ground switch and comm bundled to one central viewing station we controllers are not happy about it, but we've been overruled. This therefore precludes the presence of a circuit breaker, a circuit switcher with 'targets,' or any other such device in the series grounding continuity path.

Very true the procedure I described stipulates that use of the 'grounding through a switch' procedure is only allowed in cases where a galvanic connection through the device can be visually confirmed. Tinfoil wrote: we would not normally accept a breaker or circuit switcher to 'ground through' on an overhead system/station.

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