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IEC关于电机安装尺寸的现行有效标准主要是72(1971)《旋转电机尺寸和功率等级机座号56～400凸缘号55～1080》和72A(1970)《底脚安装电机的尺寸和功率等级机座号355～1000》两项。其中有关尺寸的各项规定为世界各国采用,我国电机国家标准也采用这些规定。IEC的2B分会近年来在电机安装尺寸方面有了新的发展,相继形成几个中央办公室文件进入了6月法和2月法表决的阶段,不久有可能成为正式的出版物而陆续付之实施。因此本文拟就其主要内容作介绍,结合IEC的原规定和国内的规定作对比阐述,并对若干问题谈谈笔者的认识。
The current valid IEC standards for motor mounting dimensions are 72 (1971), “Rotating Motor Dimensions and Power Ratings, Frame Nos. 56 to 400 Flanges 55 to 1080” and 72A (1970) “Dimension and Power Ratings for Foot-mounted Motors Frame number 355 ~ 1000 ”two. The relevant provisions of the size adopted by countries in the world, our national standards for motor use these provisions. IEC Branch 2B has seen new developments in motor installation dimensions in recent years. Several Central Office documents have been entered into the June and February voting stages, and may soon become official publications and be implemented in succession . Therefore, this article intends to introduce its main content, combined with the original provisions of IEC and domestic regulations for comparative description, and talk about the author’s understanding of a number of issues.