1 amp CO ELCB

[mattg4321]

Came across what I'm pretty sure was a current operated Crabtree ELCB today. Just had a search on here and a google and haven't found a lot. Annoyingly I didn't take a picture as I thought they would be more common than they evidently are! Pretty sure its the first I've seen in the 15 years I've been doing this.

It looked similar to the usual voltage operated ELCB we all often come across except it was a fair bit wider. Had the switch with a yellow button below and when you took the cover off it exposed some sort of large sense coil with the line and neutral running through. Rated 60A and said 1A on the side which I assume is tripping current. Tested with my MFT on 1000mA and it didn't trip but it did trip on high current EFLI tests.

Anyone?

 

[Richard Burns]

BS842:1965

Hmm that one is for VOELCB, I am not sure I would be happy leaving any of them in service.
However it is useful to know the BS number for them, which I did not know before.

 

[westward10]

I suspect it is not manufactured to a British Standard. Funnily enough I did an EICR in a museum which was quite an apt place to find some old Crabtree mcbs. They had nothing apart from the current rating written on them and each one had two tiny screws either side of the switch toggle which fixed the front panel to them which were totally unnecessary as they were further fixed within the board, took ages to get the cover on and off. Anyway contacted Crabtree who were very helpful who told me they were pre BS3871 and were essentially made to no known standard.

 

[westward10]

Hmm that one is for VOELCB, I am not sure I would be happy leaving any of them in service.
However it is useful to know the BS number for them, which I did not know before.

Think he might have to call it a Type "E" rcd which is how I believe they were identified.