标准摘要
[中文适用范围]: IEC 61558 的这一部分涉及建筑工地变压器和包含建筑工地变压器的电源装置的安全性。该标准还涵盖了包含电子电路的变压器。注 1:安全性包括电气、热学和机械方面。除非另有说明,从这里开始,术语“变压器”涵盖建筑工地用变压器和包含建筑工地用变压器的供电装置。本部分适用于建筑工地使用的固定式或移动式、单相或多相、风冷(自然或强制)独立或联合变压器、隔离或安全隔离干式变压器。绕组可以是封装的或非封装的。额定电源电压不超过 1 000 V ac,额定电源频率和内部工作频率不超过 500 Hz。该标准与开关模式电源装置 (SMPS) 的第 2-16 部分结合使用,也适用于内部工作频率高于 500 Hz 的电源。当两个要求发生冲突时,以最严格的要求为准 额定输出不超过: – 单相变压器 25 kVA; – 多相变压器为 40 kVA。本部分适用于不限制额定输出的变压器,但须经供需双方协议。注 2:供配电网络供电的变压器不包括在范围内。建筑工地用隔离变压器和带有隔离变压器的电源装置,空载输出电压和额定输出电压超过交流 50 V,不超过交流 250 V 建筑工地用安全隔离变压器和带有安全隔离变压器的电源装置,具有空载输出电压和额定输出电压不超过 50 V 交流 注 3:本标准适用于 IEC 60364-7-704 规定场所供电的变压器。后者还指定使用输出绕组的接地中点或星点进行保护。本部分涵盖的变压器和电源装置用于安装规则或设备规范出于保护目的而要求的应用。当变压器或电源装置按照 IEC 60439-4 的规定并入建筑工地的低压开关设备和控制设备组件时,IEC 60439-4 的附加要求将适用于该组件。注4:对于充满液体电介质或粉末材料(例如沙子)的变压器,附加要求正在考虑中。注5:应注意以下几点: – 还应考虑采取措施保护外壳和外壳内的部件免受真菌、害虫、白蚁、太阳辐射和结冰等外部影响; ——还应考虑变压器和供电装置的不同运输、储存和运行条件; – 根据其他适当标准和国家规则的附加要求可能适用于在热带环境等特殊环境中使用的变压器和电源装置。注6:未来变压器技术的发展可能需要提高频率的上限,在此之前本标准可作为指导性文件。 [外文原描述]: IEC 61558-2-23:2010 deals with the safety of transformers for construction sites and power supply units incorporating transformers for construction sites. Transformers incorporating electronic circuits are also covered by this standard. This second edition cancels and replaces the first edition published in 2000. It constitutes a technical revision. The main changes consist of updating this Part 2-23 in accordance with IEC 61558-1:2005. This part has the status of a group safety publication in accordance with IEC Guide 104: The preparation of safety publications and the use of basic safety publications and group safety publications. The attention of National Committees is drawn to the fact that equipment manufacturers and testing organizations may need a transitional period following publication of a new, amended or revised IEC publication in which to make products in accordance with the new requirements and to equip themselves for conducting new or revised tests. It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 12 months from the date of publication. In the meantime, the previous edition can still be ordered by contacting your local IEC member National Committee or the IEC Central Office.
英文名称Safety of transformers, reactors, power supply units and combinations thereof - Part 2-23: Particular requirements and tests for transformers and power supply units for construction sites