Before revision: C37.94 was already implemented by many protection relay manufacturers such as ABB, SEL, RFL, and RAD; and tester manufacturers such as NetProbe 2000 , ALBEDO and VEEX.
After revision: Net Research ()C37.94 was already implemented by many protection relay manufacturers such as ABB, SEL, RFL, and RAD; and tester manufacturers such as NetProbe 2000 , ALBEDO and VEEX.