Industrial switch-fuse teardown.
Added 2021-03-12 20:31:09 +0000 UTCA faulty isolator/fuse from an elevator/lift.
Quite a ferocious over centre spring mechanism in the base. It doesn't take much effort to rotate the common contact moving bar. Most of the force is to pressurise the springs to ensure a fast and solid switching action
Comments
I've just bought a circa, I'm guessing, 1950's Simplex fused switchbox all built into a flameproof enclosure for a project I'm working on. I couldn't help but compare it with this modern version. I can't actually lift the Simplex which has a 4 pole set of knife blade switches and housed 3 30amp porcelain rewireable fuses and a smaller one, perhaps to fuse 240v but it had been bridged with cable.
2021-03-15 01:27:59 +0000 UTCThere are two very scary springs in the base module.
Big Clive
2021-03-14 18:45:14 +0000 UTCIt was murder, and I can prove it!
Michael Thompson
2021-03-13 11:40:49 +0000 UTCThank goodness that powerful spring was contained. Unlike the wretched silica.
Andrew Donaldson
2021-03-13 09:57:00 +0000 UTCReally enjoyed that - yes the ‘clunk’ is such a satisfying sound / feel with those & bigger DBs etc
RDM
2021-03-13 09:13:08 +0000 UTCHope yu and Ralphie are doing well CB saw you’re on another lockdown ❤️🖖 be safe
Cerity
2021-03-13 07:16:46 +0000 UTCExcellent work Sherlock; another chapter for your casebook.
Ymir the Frost Giant
2021-03-13 03:08:57 +0000 UTCShould be sand quenched wire, iirc 👍 edit: Clive said its a ceramic disk insert with the silica sand that turns to glass at the disconnect current
Cerity
2021-03-13 00:18:30 +0000 UTCwhat does the inside of one of those fuses look like?
GL_1_Code1_1A
2021-03-12 22:50:47 +0000 UTCThis week on "Big Clive: Forensic Electrician"...
Charles
2021-03-12 21:19:35 +0000 UTCDelightful! The minute I saw where the metal panel came off! Woo!
Michael Thompson
2021-03-12 20:41:17 +0000 UTC
