电子设备用电位器 第 4 部分：分规范：单圈旋转功率电位器

[中文适用范围]： 本部分IEC 60393适用于单圈旋转功率电位器绕线技术。包括漆包线、胶合、模塑、封闭式。 本规范适用于标称耗散功率超过10 W的旋转电位器，其电阻元件由导线或绕带组成。本规范指定的所有电位器均为无减速的滑块驱动，行程小于360°并由止挡限制。 本文件规定了优选额定值和特性，并从IEC 60393-1中选择了适当的质量评估程序、测试和测量方法。它规定了此类电位器的通用性能要求。 本文件给出了最低性能要求和测试严酷等级。 附录A列出了本文件条款中使用的字母和符号。 [外文原描述]： IEC 60393-4:2023 is applicable to single-turn rotary power potentiometers wire-wound technology. Enamelled, cemented, moulded, enclosed. This specification is applicable to rotary potentiometers with nominal dissipation in excess of 10 W, the resistive element of which consists of a wire or a wound tape. All the potentiometers specified by this specification are slider-driven without reduction. Their stroke less than 360° is limited by stops. This document specifies preferred ratings and characteristics and selects from IEC 60393-1, appropriate quality assessment procedures, tests and measuring methods. It provides general performance requirements for this type of potentiometer. This document gives the minimum performance requirements and test severities. Annex A lists the letters and symbols used in the clauses of this document. This edition includes the following significant technical changes with respect to the previous edition: a) the document structure has been organized to follow new sectional specification structure decided in TC 40; b) the information on the assessment level EZ and FZ (zero nonconforming) has been revised.