You Searched for - IS 3231 : Part 3 : Sec 4
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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 :