Rosseti ordered this device for the Sayano-Shushinskaya HPP.
This is the Buchholz (gas) relay ABR with a 4-20mA signal.
There are no analogues of this relay in Russia. The relay has more contacts: three each for warning and shutdown signals.
The device is ready and has passed all the necessary tests.
We have sent it to our customer and are looking forward to feedback.
We experiment and get the job done.