You Searched for - is 3231 : part 3 : sec 1
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IS 3231 : Part 3 : Sec 1 : 1987
(Reaffirmed Year :
2011
)
Electrical Relays for Power System Protection - Part 3 : Requirements for Particular Group of Relays - Section 1 : Non-specified Time or Independent Specified Time Measuring Relays
Technical Committee :
ETD 35
Superseeded by :