I tried "phone a friend" and he said Google BS symbols to see what the "drawbridge and X" symbol indicates it is, but I have not had much luck doing so.
Does the "drawbridge and X" symbol indicate it is a circuit breaker? If so I presume it is a single pole 80-amp circuit breaker that throws the attached interlinked switch in the neutral.
There is not any provision to lock it off, so again I presume, it's not an isolator. There are two intake rooms with one of these panels either side of the central intake and I think the T's on the front of the devices stands for Talisman, there are some other devices that say Bill on them
I could probably found that out by removing the steel front cover, but not unsurprisingly I will make not dismantling the intake equipment a limitation!
I think those Australian symbols look slightly different to the ones I'm used to - but the basics look the same - i.e. a "bar" across the fixed contact indicate an isolation gap when open and the "x" overcurrent protection - so yes a simple CB. As yours symbol seems only to show a single switching element I would suspect the main MCCB part doesn't switch N (I can't see any N terminals on the one you linked to either, despite the link title).
The plain unit to the left of each MCCB - is that just a blank or might it be an add-on contact for N? Is the side label you show from the N block (if that's what it is) or from the main MCCB?
Most standards seem to require things that they apply to be marked with their standard number - so I suspect this would be most easily solved by removing the cover....(but 60947 sounds entirely plausible).
I don't think there's any general requirement for an isolator to have an in-built means of locking-off - it may need some add-on gadget or rely on locking the overall case or just not be intended for isolating remote items.
The blue blank plate “pops off” and there is a switch mechanism in the neutral side.
Considering the distribution cable goes up four storeys from the cellar then to the other end of the building, a run of about 80 metres, and I was swapping out the main switch in the consumer unit for a 30 mA RCD to avoid a C2 and C3’s on the report, being able to lock it off easily would be an major advantage.
My plan when I got there was to take a fuse out and put it in my pocket, but there wasn’t one to take out.
