My client is considering the ABB 670-series relays for line differential protection for the first time on their system. Can anyone offer feedback on how this relay has performed for them on HV or EHV lines (installation issues, trip security, general reliabiility)?
bahamaman
I'm investigating whether there exists a machine that can remove the bark from a shrub (1" - 3" diameter) without destroying the bark. The goal of the research I'm doing is to find a way to remove the bark of a tree for its medicinal use, but with minimal shredding/chipping. All the...