Detailed protection relay settings for 220kV Thai Binh Substation (E11. 1), covering differential, distance, and overcurrent functions. Essential for power system engineers. The documents presented should serve as a model to various utilities in preparing similar documents for setting protection relays installed installed at 220kV, 400kV and 765kV EHV and UHV transmission systems. The numerical terminals referred as IED (Intelligent electronic device) contain apart. e in Indian grid on 30th and 31st July 2012, Ministry of Power constituted a 'Task Force on Power System Analysis under Contingencies' in December 2012. The Terms of Reference of Task Force broadly cover analysis of the network behaviour under normal conditions and contingenci review of the. MODEL SETTING CALCULATIONS FOR TYPICAL IEDs LINE PROTECTION SETTING GUIDE LINES PROTECTION SYSTEM AUDIT CHECK LIST RECOMMENDATIONS FOR PROTECTION MANAGEMENT SUB-COMMITTEE ON RELAY/PROTECTION UNDER TASK FORCE FOR POWER SYSTEM ANALYSIS UNDER CONTIGENCIES New Delhi March 2014 Protection subcommittee. Conversion to Secondary value from Primary value: Above parameters are given for primary equipment. In HV (High Voltage) and MV (Medium Voltage) substations, relay protection safeguards critical assets such as transformers, circuit breakers, and lines. Protection selectivity is partly.