Love to see a fuse feeding a submain, don't see it nearly enough though
Well just for you here is a recent photo of some 3036 fuses feeding a submain. They should be 100A wires but there was a random assortment of doubled up fuse wires, each fuse different! This switch fuse is in poor condition in more ways than is shown in the photo. The conductors are 70mm.Love to see a fuse feeding a submain, don't see it nearly enough though
That's what they all sayIt really is bigger than it looks!
I'm pretty sure I have seen some charts (Merlin Gerin / Schneider) which do allow full discrimination of certain MCBs but iirc I think it depends on fault current.Not really. If we are talking about fault protection as opposed to overload protection then there is liable to be sufficient current to operate any and all devices in most cases.
Fuses or MCCBs are far better for achieving selectivity (discrimination).
Probably, though the flash pads were missing. The seal looked to be painted over with something clear (PVA?) so perhaps h+s have had a go at making it safer. It would have been better to replace the unit to remove the hazard though. All the other switchgear of this age has been replaced, except this one.Asbestos seal and probably flash pads?
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