Old mem mcb type

[graham123]

Hi all, anybody come across these mem mcbs. Don't know what type they are. All it has on them is 3871 part 1. Apologies for the picture will upload a better one tommorow. cannot even find anything on Google or eBay.

 

[Leesparkykent]

http://www.shepleyelectricalservices.com/Max ZS Table.pdf

does this help?

He doesn't know what type they are though.

 

[Charlie_]

The number 1 is just to denote that the device is single phase..
This type of denotation is still in use today.. 1 being single phase and 3 being 3 phase..
I would say that the devices are either type 1 or type 2.. The easiest way to find out would be to carry out a quick load test.
Is there a M number on the side? This denotes breaking capacity..

 

[Toneyz]

Ahh I see, so none of the MCBs manufactured that look the same were Type 1 or 3s?

I had these before on a EICR phoned tech department at Eaton was type 3 and gave me max Zs at 5 & 0.4 sec just got to check KA