Merni releji i zaštitna oprema – Deo 187-1: Funkcionalni zahtevi za diferencijalnu zaštitu – Ograničena i neograničena diferencijalna zaštita motora, generatora i transformatora - Ispravka
Measuring relays and protection equipment - Part 187-1: Functional requirements for differential protection - Restrained and unrestrained differential protection of motors, generators and transformers