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See Chinese contents: GB/T 3906-2020 GB/T 3906-2020: Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6 kV and up to and including 40.5 kV
This standard specifies the terms and definitions, usage conditions, ratings, design and structure, type testing, exit-factory testing and other technical requirements for alternating-current metal-enclosed switchgear and controlgear for rated voltages 3.6 kV~ 40.5 kV.
