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IEEE/IEC International Standard - Subsea equipment - Part 2: Power transformers
This part of IEC/IEEE 61886 is applicable to three-phase and single-phase liquid immersed subsea power transformers (including auto-transformers) with at least one winding with rated voltages in the range 3,6 ≤ Um ≤ 245 kV and with rated power in the range 50 kVA to 300 MVA. The intention is to specify additional requirements that are not covered by the IEC 60076 series and IEEE Std C57.12TM series. It is the intention of this document that subsea power transformers be designed and tested either in accordance with the IEC 60076 series (IEC profile) or with the IEEE C57.12 series (IEEE profile). For subsea transformers where no winding has a rated voltage above or equal to 3,6 kV, this document can be applicable, either as a whole or in part. The mechanical design principles are also applicable for liquid-immersed reactors. Where the terms "subsea transformer" or "transformer" are used, this means "transformer assembly". Where required, it is stated whether transformer accessories like penetrators and connectors are included or not.
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