You Searched for - IS 9921 : Part 4
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IS 9921 : Part 4 : 1985
(Reaffirmed Year :
2012
)
Alternating Current Disconnectors (isolators) and Earthing Switches for Voltages Above 1000 V - Part 4 : Type Tests and Routine Tests
Technical Committee :
ETD 8
Superseeded by :