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high-voltage switchgears underground substation Maintenance Unit manufacturer

IEC 62271 – Series Standards for MV-Switchgear· PDF fileIEC 62271-1 High-voltage switchgear and controlgear – ... operation and maintenance 11.Safety 12.Influence of the product on the environment ... (unless the equipment has passed the whole type tests as a functional unit) • Environmental tests • Dielectric test (2 kV / 1 min.)

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