接触电流和保护导体电流的测量方法

[中文适用范围]： 本国际标准定义了测量方法，用于测量可能流经人体的直流或交流电流（正弦或非正弦波形）以及流经保护导体的电流。 推荐的触摸电流测量方法基于电流流经人体可能产生的效应。在本标准中，通过代表人体阻抗的网络测量电流被称为触摸电流测量。这些网络不一定适用于动物身体。 本标准不涉及特定限值的规范或暗示。IEC TS 60479-1系列提供了关于电流通过人体效应的信息，可从中推导出限值。 本标准适用于根据IEC 60536和61140分类的所有设备类别。 本标准的测量方法不适用于： - 持续时间小于1秒的触摸电流 - IEC 60601-1中定义的病人电流 - 频率低于15Hz的交流电 - 交流电与直流电的组合 - 超过电灼伤限值的电流 本基础安全出版物主要供技术委员会根据IEC指南104和ISO/IEC指南51的原则制定标准时使用。除非在相关出版物中特别引用或包含，否则本基础安全出版物的要求、测试方法或测试条件不适用。 [外文原描述]： IEC 60990:2016 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 60990:2016 defines measurement methods for d.c. or a.c. current of sinusoidal or non-sinusoidal waveform, which could flow through the human body, and current flowing through a protective conductor. The measuring methods recommended for TOUCH CURRENT are based upon the possible effects of current flowing through a human body. In this standard, measurements of current through networks representing the impedance of the human body are referred to as measurements of TOUCH CURRENT. These networks are not necessarily valid for the bodies of animals. The specification or implication of specific limit values is not within the scope of this standard. IEC TS 60479 series provides information regarding the effects of current passing through the human body from which limit values may be derived. This standard is applicable to all classes of EQUIPMENT, according to IEC 61140. The methods of measurement in this standard are not intended to be used for TOUCH CURRENTS having less than 1 s duration, patient currents as defined in IEC 60601-1, a.c. at frequencies below 15 Hz, and currents above those chosen for ELECTRIC BURN limits. This third edition cancels and replaces the second edition published in 1999. It constitutes a technical revision. The principal changes in this edition as compared with the second edition are as follows: - the effects names have been updated to reflect increased understanding of the range of effects and is in concert with present usage; - the conditions of use invoking a GRIPPABLE PART have been reduced in the application of the requirements based upon the current understanding of this effect; - the references to ISO 10012-1, which has been replaced by management standard of the same number, have been replaced with explanatory text, where needed to maintain the sense of the document; - former informative Annex H (GRIPPABLE PART) has been deleted from this update as it does not properly represent the full set of conditions under which immobilization can occur. A new informative Annex H (Analysis of frequency filtered touch current circuits measurement) has been added and the Bibliography (formerly Annex M) has been updated with additional references for completeness. This basic safety publication is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51. It is not intended for use by manufacturers or certification bodies independent of product standards. It has the status of a Basic Safety Publication in accordance with IEC Guide 104. Keywords: Touch Current, Protective Conductor Current, Current Flow