用于将交流和直流电量转换为模拟或数字信号的电测量传感器

[中文适用范围]： 本文件适用于具有电气输入和输出的转换器，用于对交流或直流电气量进行测量。输出信号可以是模拟直流、模拟直流电压或数字形式。本文件适用于将电气量（如电流、电压、有功功率、无功功率、功率因数、相位角、频率、谐波或总谐波失真、视在功率）转换为输出信号的测量转换器。本文件不适用于：符合 IEC 61869（所有部分）的仪用互感器；符合 IEC 60770（所有部分）的用于工业过程应用的变送器；以及符合 IEC 61557-12:2018 的性能测量和监控设备（PMD）。在测量范围内，输出信号是被测量的函数。可能需要辅助电源。本文件适用于：a) 输入的名义频率在 0 Hz 至 1 500 Hz 之间；b) 作为非电气量测量系统一部分的电气测量转换器，且其 otherwise 落入本文件范围；c) 用于遥测、过程控制以及各种定义环境中的转换器。本文件旨在：规定与主要应用于工业的转换器相关的术语和定义；统一评估转换器性能所用的测试方法；规定转换器的精度限值及输出值。 [外文原描述]： IEC 60688:2021 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60688:2021 applies to transducers with electrical inputs and outputs for making measurements of AC or DC electrical quantities. The output signal can be in the form of an analogue direct current, an analog direct voltage or in digital form. This document applies to measuring transducers used for converting electrical quantities such as – current, – voltage, – active power, – reactive power, – power factor, – phase angle, – frequency, – harmonics or total harmonic distortion, and – apparent power to an output signal. This document is not applicable for – instrument transformers that complies with IEC 61869 (all parts), – transmitters for use in industrial process application that complies with IEC 60770 (all parts), and – performance measuring and monitoring devices (PMD) that comply with IEC 61557 12:2018. Within the measuring range, the output signal is a function of the measurand. An auxiliary supply can be needed. This document applies a) if the nominal frequency of the input(s) lies between 0 Hz and 1 500 Hz, b) to the electrical measuring transducer if it is part of a system for the measurement of a non-electrical quantity, and if it otherwise falls within the scope of this document, and c) to transducers for use in a variety of applications such as telemetry and process control and in one of a number of defined environments. This document is intended: – to specify the terminology and definitions relating to transducers whose main application is in industry, – to unify the test methods used in evaluating transducer performance, and – to specify accuracy limits and output values for transducers. IEC 60688:2021 cancels and replaces the third edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) updating normative references; b) additional requirements for specific transducers used for LV monitoring applications; c) creation of interface coding to ease selection by the end-user.