【正文】 nal arc tests. – 7 – EN 62271202:2020 HIGHVOLTAGE SWITCHGEAR AND CONTROLGEAR – Part 202: Highvoltage/lowvoltage prefabricated substation 1 General Scope This part of IEC 62271 specifies the service conditions, rated characteristics, general structural requirements and test methods of HV/LV or LV/HV prefabricated substations, which are cableconnected, to be operated from inside (walkin type) or outside (nonwalkin type) for alternating current of rated voltages above 1 kV and up to and including 52 kV on the HV side, and for one or more transformers for service frequencies up to and including 60 Hz for outdoor installation in locations with public accessibility. Prefabricated substations can be situated at ground level or partially or pletely below ground level. In general, a prefabricated substation prises the following main ponents (functions): – enclosure。 – HV and LV switchgear and controlgear。 – auxiliary equipment and circuits. However, relevant provisions of this standard are applicable to designs where not all these ponents exist (for example, an installation consisting of power transformer and LV switchgear). NOTE Nonprefabricated substations should ply with the applicable requirements of IEC 619361. Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60076 (all parts), Power transformers IEC 600761, Power transformers – Part 1: General IEC 600762, Power transformers – Part 2: Temperature rise IEC 600765, Power transformers – Part 5: Ability to withstand short circuit IEC 6007610, Power transformers – Part 10: Determination of sound levels IEC 6007611, Power transformers – Part 11: Drytype power transformers EN 62271202:2020 – 8 – IEC 60364441, Electrical installations of buildings – Part 441: Protection for safety – Protection against electric shock IEC 604391, Lowvoltage switchgear and controlgear assemblies – Part 1: Typetested and partially typetested assemblies IEC 60466, AC insulationenclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 38 kV IEC 60529, Degrees of protection provided by enclosures (IP Code) IEC 606641, Insulation coordination for equipment within lowvoltage systems – Part 1: Principles, requirements and tests IEC 60694, Common specifications for highvoltage switchgear and controlgear standards IEC 607211, Classification of environmental conditions – Part 1: Environmental parameters and their severities IEC 6072122, Classification of environmental conditions – Part 22: Environmental conditions appearing in nature – Precipitation and wind IEC 6072124, Classification of environmental conditions – Part 24: Environmental conditions appearing in nature – Solar radiation and temperature IEC 60815, Guide for the selection of insulators in respect of polluted conditions IEC 60905, Loading guide for drytype power transformers IEC 61166, Highvoltage alternating current circuitbreakers – Guide for seismic qualification of highvoltage alternating current circuitbreakers IEC 611801, Highvoltage test techniques for lowvoltage equipment – Part 1: Definitions, test and procedure requirements IEC 619361, Power installations exceeding 1 kV – Part 1: Common rules IEC 62262, Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code) IEC 62271200, Highvoltage switchgear and controlgear – AC metalenclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV ISO/IEC Guide 51, Safety aspects – Guidelines for their inclusion in standards ISO 1052, Steels for general engineering purposes ISO 1182, Reaction to fire tests for building products – Nonbustibility tests ISO 1716, Reaction to fire tests for building products – Determination of the heat of bustion ISO 65081, Metallic materials – Rockwell hardness test – Part 1: Test methods (scales A, B, C, D, E, F, G, H, K, N, T) – 9 – EN 62271202:2020 Terms and definitions For the purposes of this document, the following terms and definitions apply. For the definitions of general terms used in this document, reference is made to IEC 60050441. prefabricated substation prefabricated and typetested assembly prising an enclosure containing ponents (functions) described in transport unit part of a prefabricated substation suitable for shipment without being dismantled enclosure part of a prefabricated substation providing protection against external influences to the substation and a specified degree of protection for operators and the general public with respect to approach to, or contact with, live parts and against contact with moving parts partment part of a prefabricated substation enclosed except for openings necessary for interconnection, control or ventilation NOTE A partment may be designated by the main ponent contained therein, for example, transformer, highvoltage switchgear and controlgear, lowvoltage switchgear and controlgear respectively. ponent essential part of the prefabricated substation, which serves one or several specific functions (for example, transformer, highvoltage switchgear and controlgear, lowvoltage switchgear and controlgear, etc.) partition part of a prefabricated substation separating one p