High-voltage switchgear and controlgear
Part 307: Guidance for the extension of validity of type tests of AC metal and solid-insulation enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV release_sjajbpnoaffi3fdpz54ydehs6u [as of editgroup_a7amauikyrh53nhvzwoowsqkwu]

Released as a standard by BSI British Standards.

Type  standard
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