2.适用范围和领域2。1设备类型本标准适用于高压开关设备和控制设备室内或室外安装中使用的熔焊锻铝和铝合金外壳，外壳采用干燥空气、惰性气体（如六氟化硫、四氟化碳或氮气或其混合物）加压，如果气体主要用于其介电和/或灭弧特性，额定电压（a）为1kV，最高为52kV（含52kV），并带有设计压力大于3bar（表压）的充气室； 及（b）72.5千伏及以上。外壳包括电气设备的部件，不一定限于以下示例:断路器、开关、隔离开关、接地开关、电流互感器、电压互感器、电涌放电器、母线和连接。范围还包括加压部件，如带电储罐开关设备和控制设备的中心室，气体绝缘电流互感器等。2.2外壳的生产应符合记录的焊接程序，焊接程序应由经过良好培训和监督的焊接人员执行。 如果没有国际标准（ISO或CEN），可以使用国家标准。注:当涵盖各个方面的ISO或CEN标准可用时，本标准将尽快修订。2.3质量保证本标准的目的是，开关设备制造商应负责实现并保持一致且充分的产品质量。外壳制造商应进行充分检查，以确保材料、生产和测试在各方面符合本标准和ISO 6213的要求: 1983.用户检查员的检查不应免除开关设备制造商执行此类质量保证程序的责任，以确保满足本标准的要求和意图。注:制造商应按照适用的ISO 9000系列标准注册质量保证计划。加拿大偏差包含在本标准中。

2. Scope and Field of Application2.1Type of Equipment This Standard applies to fusion welded wrought aluminium and alu minium alloy enclosures pressurized with dry air, inert gases, eg, sulphur hexafluoride, carbon tetrafluoride, or nitrogen or a mixture of such gases, used in indoor or outdoor installations of high-voltage switchgear and controlgear, where the gas is used principally for its dielectric and/or arc- quenching properties, with rated voltages (a) 1 kV and up to and including 52 kV and with gas-filled compartments with design pressure greater than 3 bar (gauge); and (b) 72.5 kV and above.The enclosures comprise parts of electrical equipment not necessarily limited to the following examples:Circuit-breakers Switch-disconnectors Disconnectors Earthing switches Current transformers Voltage transformers Surge arresters Busbars and connectionsThe scope covers also pressurized components such as the centre- chamber of live tank switchgear and controlgear, gas-insulated current transformers, etc.2.2Production The production of the enclosures shall be in accordance with documented welding procedures which shall be carried out by well trained and supervised welding personnel. Where International Standards (ISO or CEN) are not available National Standards may be used.NOTE - This standard will be revised as soon as possible when ISO or CEN standards covering the various aspects are available.2.3Quality Assurance It is the intention of this standard that the switchgear manufacturer shall be responsible for achieving and maintaining a consistent and adequate quality of product.Sufficient examinations shall be made by the enclosure manufacturer to ensure that the materials, production and testing comply in all respects with the requirements of this standard and ISO 6213:1983. Inspection by the user's inspectors shall not absolve the switchgear manufacturer from his resp onsibility to exercise such quality assurance procedures as to ensure that the requirements and the intent of this standard are satisfied.NOTE - The manufacturer should have a quality assurance program registered to the applicable ISO 9000 series standards.Canadian Deviations are included in this Standard.