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1范围IEC6O404的这个部分,规定了标称厚度为0.35mm、0.50mm、0.65mm和1.00mm冷轧无取向电工钢片和钢带的各个等级。特别是规定了一般要求、磁性能、几何特性和公差、工艺特性以及检验过程。注——本标准在附录A中给出了厚度为0.47mm的电工钢片和钢带在50Hi和60HZ下的磁性能。本标准适用于以全退火状态供货的用来构成磁路的一些材料。它不适用于半工艺状态的材料。这些磁性材料相应于IEC60404-1的C21条。2引用标准下列标准包含的一些条款,通过在本文中引用,构成IEC60404这个部分的条款。在标准出版时,下面指出的各版本都是有效… 相似文献
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1范围IEC60404的这个部分规定以半工艺状态,即没经最终热处理交货的、标称厚度为0.50mm和0.65mm的冷轧电工非取向合金①钢片的钢带的各种等级。还规定了一般要求,磁性能、几何持性和公差、技术特性以及检验过程。本标准适用于用作磁路结构的材料。这些磁性材料相应于IEC60404-l的C21条。2引用标准下述标准包含的一些条款,通过在本文中引用,构成IEC60404这个部分的条款。在标准出版时,下面指出的各版本都是有效的。所有的标准都要经过修订,鼓励根据IEC60404的这个部分达成协议的各方,探讨使用下面指出的各标准的最新版本的可… 相似文献
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1范围IEC60404的这个部分规定以半工艺状态,即未经最终热处理交货的、标称厚度为0.50mm和0.65mm的冷轧电工非合金①钢片和钢带的各种等级。还规定了一般要求、磁性能、几何特性和公差、技术特性以及检验过程。本标准适用于用作磁路结构的材料。这些磁性材料相应于IEC60404-1的BZ条。2引用标准下列标准包含的一些条款,通过在本文中引用,构成IEC60404这个部分的条款。在标准出版时,下面指出的各版本都是有效的。所有的标准都要经过修订,鼓励根据IEC60404的这个部分达成协议的各方,探讨使用下面指出的各标准的最新版本的可能性… 相似文献
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1 范围 IEC404—8的这一篇是用来规定标称厚度为0.05mm,0.10mm,0.15mm和0.20mm薄的无取向磁性钢带以及标称厚度0.05mm,0.1mm和0.15mm薄的取向磁性钢带的各种等级。特别是本篇给出了一般要求、磁性能、几何特征与公差、工艺特性以及 相似文献
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介绍了屏蔽电机的结构及关键加工工艺,指出通过热处理工艺和优化铣削加工工艺,较好地控制了屏蔽电机机座由焊接、机械加工引起的变形,通过消除冲片同板厚度差保证定子铁心装压的齿部尺寸公差,并通过设计合理的工装保证绕组端部形状。详细地论述了通过转子的3次热处理、车、磨加工工艺保证了电机转子的加工精度。 相似文献
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Cables made to IEC and US standards, while having the same purpose, are of widely different designs. Cables made to one standard cannot be made to match the requirements of the other. The cable made to the US standards have been used in the US and throughout most of the world. The IEC standards have not been widely used in Europe where national and private industrial and utility standards have prevailed. IEC standards have been mainly used in countries where there have not been strong electrical codes. The European Union's adaptation of the IEC standards under the harmonized EN standards of CENELEC adds the force of law to the standards. This will promote a wider use of the IEC (CENELEC) standards on the European continent, although each country could still apply its national rules to the CENELEC standard. This is scheduled to change because all CENELEC European harmonized documents have already been withdrawn and replaced by European Norms. These are the same, word for word, in all European countries. CENELEC members are also members of the IEC and, therefore, do not operate a competitive policy with respect to the IEC. International harmonization of standards must be done at the IEC level. The addition of the CE mark to products meeting CENELEC is similar to the application of the UL mark to products meeting UL standards in the US Worldwide harmonization of standards looks to be a long process. North American and European electrical systems are based on different voltages or frequencies, different conductor sizes, and a different concept of what an electrical system should do 相似文献
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根据工程建设国家标准设计规范及规定,参考日本和国际电工委员会的相关标准,提出了民用建筑漏电火灾报警系统设计的具体要求,介绍了漏电火灾报警系统的组成. 相似文献
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Kunihiko Hidaka Hisatoshi Ikeda 《IEEJ Transactions on Electrical and Electronic Engineering》2009,4(1):58-61
A world economy expands over boundaries between countries and regions. In Japan, there are many splendid technologies which the world requires. In order to transfer these technologies to the world an international standard which includes them as a standard is necessary. Activities by which 1100 kV UHV technologies are standardized in the IEC standard were conducted by starting with discussions in IEC/SB1. The activity has been followed by IEC/JICCG which coordinates IEC and CIGRE activities. The horizontal standards were started in advance at TC 8 and TC 28. The equipment standards will start from 2009 after the CIGRE committee finishes their reports by the end of 2008. Activities by the IEEJ standard committee have been carried horizontally to proceed with the UHV standardization rapidly and efficiently. Copyright © 2009 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. 相似文献
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对自IEC/TC 57成立以来所发布的所有国际电力标准进行了收集和研究,并对它们从相关信息、对应的国内标准,以及标准系列等方面做了简要介绍和研究分析。同时也对目前正在修订、制定以及计划将在2014年申请立项的新标准项目进行分析、归纳研究。主要从时间、使用以及操作等方面进行展开,对IEC/TC 57国际标准体系进行研究,并对该研究领域未来的发展趋势进行了展望,探讨了今后研究的热点领域。随着智能电网的发展,该研究将对我国智能电网标准建设具有规范和指导意义。 相似文献
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文章对国内外智能电网进展情况进行了分析,主要介绍并分析了美国、欧洲、日本、中国等国家和地区智能电网研究与实践进展情况,并从关键技术、技术标准、建设重点、示范项目等方面介绍分析了智能电网取得的主要成就、存在的问题及注意事项,对未来智能电网发展趋势做了展望。 相似文献
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目前核电站、船舶 (包括舰船和潜艇 )、地铁和煤矿等行业制定了标准 ,规定了阻燃电缆的级别必须为 A类 ,因此 A类燃烧试验又成为了成束燃烧试验中最重要的部份。本文介绍了 A类成束燃烧试验方法 ,从 IEC332 - 1(第 1版 )的一种演化到第 2、第 3版 (IEC6 0 332 - 3)的两种—— A类和 AF/R类的过程及原因 ,并对这两种试验方法和试验结果进行了较详细论述和分析 ,指出 AF/R类成束试验更为苛刻 ,要求更为严格。 相似文献
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电动汽车国际充电标准发展趋势 总被引:1,自引:0,他引:1
近年来,主要汽车大国纷纷开展电动汽车的研发与生产,但发展方向却不尽一致。因各国电力系统存在差异,故电动汽车在充电设备及规格、车辆设计等方面的研发方向就各不相同。对主要汽车大同日本和欧美的电动汽车充电标准进行比较研究,并对我国所应采取标准化行动提出政策建议。 相似文献
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The harmonic and interharmonic analysis recommendations are contained in the latest International Electrotechnical Commission (IEC) standards on power quality. Measurement and analysis experiences have shown that great difficulties arise in the interharmonics detection and measurement with acceptable levels of accuracy. In this paper, the spectral leakage problems of the discrete Fourier transform due to synchronization errors of interharmonics are analyzed. The time-domain averaging is investigated for the processing of harmonics in the framework of the IEC standards. A difference filter is proposed to detect interharmonics and can be compatible with the IEC standards. Simulations and the field results show the usefulness of the proposed methods. 相似文献