False Applications of Reliable Relaying Principles revisited

This paper re-examined certain nuances of fundamental principles which are directly or indirectly related to protective relaying that were in the original paper. We´ve found that in most every case the previous conclusion reached was correct. In those instances filtering in microprocessor relaying was able to eliminate that harmonics that were applied to electromechanical relays. Current transformers still obey the laws of Physics. Fortescue´s rules of Symmetrical Components still apply. Power line carrier modal analysis still applies, and Kirchoff´s law still applies to transformer differential relays.