高压开关设备和控制设备. 第202部分: 高压/低压预装式变电站

[中文适用范围]： IEC 62271的本部分规定了电缆连接的高压/低压或低压/高压预装式变电站@从内部操作（步入式变电站）的使用条件@额定特性@一般结构要求和试验方法）或室外（非步入式），适用于高压侧额定电压高于 1 kV 且不超过 52 kV 的交流电@，以及用于室外使用频率不超过 60 Hz 的一台或多台变压器安装在公共通道和提供人员保护的位置。预装式变电站可以位于地面，也可以部分或完全位于地面以下。一般来说，预制变电站包括包含以下电气部件的外壳： - 电力变压器； ——高、低压开关设备和控制设备； - 高压和低压互连； - 辅助设备和电路。然而，本标准的相关规定适用于并非所有这些电气元件都存在的设计（例如，由电力变压器和低压开关设备组成的装置）。非预装式变电站应符合 IEC 61936-1:2010 的适用要求。 [外文原描述]： IEC 62271-202:2014 specifies the service conditions, rated characteristics, general structural requirements and test methods of high voltage/low voltage or low voltage/high voltage prefabricated substations, which are cable-connected, to be operated from inside (walk-in type) or outside (non-walk-in type) for alternating current of rated voltages above 1 kV and up to and including 52 kV on the high voltage side, and for one or more transformers for service frequencies up to and including 60 Hz for outdoor installation at locations with public accessibility and where protection of personnel is provided. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) regarding temperature-rise test an alternative method for liquid filled transformers is (re)introduced and the temperature-rise test method for dry-type transformers is specified more precisely; b) testing procedure for short time and peak withstand current tests are specified more precisely; c) assessment of electromagnetic fields is considered including a type test (optional) according IEC/TR 62271-208:2009; d) influence of the product on the environment is considered (Clause 12); e) internal arc test requirements have been adapted to IEC 62271-200:2011 and requirements for the assessment of pressure relief volumes below the floor / ground has been assigned; f) the method for defining the load factor in an enclosure for liquid filled transformers is extended with different temperature rises for the transformer outside the enclosure (Annex DD); g) for the calculation of the load factor of dry-type transformers in an enclosure the insulation systems according to IEC 60076-1:2011, Tables B.1 and B.2 are worked out in detail. This publication is to be read in conjunction with IEC 62271-201:2007. The contents of the corrigendum of April 2015 have been included in this copy.