You Searched for - is 3231 : part 3 : sec 4
-
1
IS 3231 : Part 3 : Sec 4 : 1987
(Reaffirmed Year :
2011
)
Electrical Relays for Power System Protection - Part 3 : Requirements for Particular Group of Relays - Section 4 : Directional Relays and Power Relays
Technical Committee :
ETD 35
Superseeded by :