There is some amount of documentation available.
these relays typically belong to an old GSX generator protection from ABB/BBC.
Where are you located? send me a note & I will help you out
rgds
Thank you for your answer.You are right, I am intersted in all manuals (instruction for instalation and operation) for generator protection system GSX5e, especially in units:
sgx 115
ppx 105
usx 112, 115, 116
ipx 146.
Suggestion: Some businesses do not post their manuals of some products that are about to be replaced or have been replaced. Presently, ABB advertizes different generator protection systems without any reference that would indicate the replacement of the posted relays.