Over Current Protection Relay J.G.Statter & Co Ltd 1

[SRA007]

Hi
I am working on an old switchgear form year before 1967 the manufacture of the switchgear relay is J.G.Statter & Co Ltd could anyone please tell me that how overcurrent protection on this switchgear works and do we have any protection characteristic curves for it. Please find the photo of the breaker attached.
Regards Ali

 

[7anoter4]

See:

http://www.gracesguide.co.uk/J._G._Statter_and_Co

By-the-way your link is wrong: nothing is shown.