SNo |
IS Number |
Title |
Technical Committee |
1 |
IS 3231 : Part 3 : Sec 3 : 1987 |
Electrical Relays for Power System Projection - Part 3 : Requirements for Particular Group of Relays - Section 3 : Biased (Percentage) Differential Relays |
ETD 35 |
2 |
IS 3231 : Part 3 : Sec 4 : 1987 |
Electrical Relays for Power System Protection - Part 3 : Requirements for Particular Group of Relays - Section 4 : Directional Relays and Power Relays |
ETD 35 |
3 |
IS 3231 : Part 3 : Sec 5 : 1987 |
Electrical relays for power system Protection: Part 3 Requirements for particular group of relays, Section 5 Impedance measuring relays |
ETD 35 |