To my father who was an exemplary human being and a committed mathematics teacher

About me ...

I’m Firoozeh Nematolahi. I was born in 1968 and grew up in Kerman, Iran. Studying Electronics was my choice and I graduated from “Shahid Bahonar Univercity of Kerman” in 1991.

I’m proud to have worked for more than 7 years with experts at “Microprocessor Neda Co.”, “Momtazan Co.” and “Kerman Regional Power Electric Co.” in Kerman, and for more than 19 years with experts at “Metanir Co.” in Tehran.

Currently I work on my own and I have decided to publish some technical informative highlights of different types of power system  protection relays  through this website. At first, the focus will be on the setting parameters and logic diagrams of protection relays and protective functions. This summarized technical & graphical information will be very helpful for power-system protection engineers, especially when they have to set relays, approve settings, test relays, analyze  events or simulate the system.


One of the main reasons for "incorrect operation of protection relays/functions" is "incorrect setting" .

WebGreenStation intends to be a good reference for many protection relays setting parameters and related highlights.