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首页> 美国政府科技报告 >IEMA Standard Guide for Graphical Symbols and Code of Equipment Designation for Switchgear and Controlgear Circuit Diagrams
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IEMA Standard Guide for Graphical Symbols and Code of Equipment Designation for Switchgear and Controlgear Circuit Diagrams

机译：IEma开关设备和控制设备电路图的图形符号和设备代码标准指南

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摘要

This guide has been prepared to consolidate the symbols and letter codes generally used in the electrical switchgear and control-gear industry. Adoption of this guide would result in uniform practice which would help in the interpretation of circuit diagram as also ease in the assembly/production of switchboards. This standard guide covers: (a) letter-code for the designation of kind of items; (b) graphical symbols concerning -(i) measuring instruments (ii) audo-visual signaling device (iii) conductors (iv) general circuit elements (v) indicating instruments and measuring instruments (vi) kind of current and system of distribution (vii) motor starters (viii) operating devices and methods (ix) rotating machines (x) switchgear (xi) instrument transformers, shunts and (xii) transformers.

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