• IEC 60990:2016 RLV

    Current The latest, up-to-date edition.

    Methods of measurement of touch current and protective conductor current

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English

    Published date:  30-05-2016

    Publisher:  International Electrotechnical Committee

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    Table of Contents - (Show below) - (Hide below)

    1 Scope
    2 Normative references
    3 Terms and definitions
    4 Test site
    5 Measuring equipment
    6 Test procedure
    7 Evaluation of results
    8 Measurement of protective conductor current
    Annex A (normative) - Equipment
    Annex B (normative) - Use of a conductive plane
    Annex C (normative) - Incidentally connected parts
    Annex D (informative) - Choice of current limits
    Annex E (informative) - Networks for use in
            measurement of touch current
    Annex F (informative) - Measuring network
            limitations and construction
    Annex G (informative) - Construction and
            application of touch current measuring
    Annex H (informative) - Analysis of frequency
            filtered touch current circuit measurements
    Annex I (informative) - AC power distribution
    Annex J (informative) - Routine and periodic
            touch current tests, and tests after repair
            or modification of mains operated equipment
    Annex K (normative) - Network performance
            and calibration

    Abstract - (Show below) - (Hide below)

    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

    General Product Information - (Show below) - (Hide below)

    Committee TC 108
    Development Note Stability date: 2022. (06/2016)
    Document Type Redline
    Publisher International Electrotechnical Committee
    Status Current

    Standards Referencing This Book - (Show below) - (Hide below)

    IEC 60950-1:2005+AMD1:2009+AMD2:2013 CSV Information technology equipment - Safety - Part 1: General requirements
    IEC TS 60479-1:2005+AMD1:2016 CSV Effects of current on human beings and livestock - Part 1: Generalaspects
    IEC 60050-195:1998 International Electrotechnical Vocabulary (IEV) - Part 195: Earthing and protection against electric shock
    IEC 60364-4-41:2005+AMD1:2017 CSV Low voltage electrical installations - Part 4-41: Protection for safety - Protection against electric shock
    IEC 60364-1:2005 Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, definitions
    ISO/IEC Guide 51:2014 Safety aspects Guidelines for their inclusion in standards
    ISO/IEC Guide 50:2014 Safety aspects Guidelines for child safety in standards and other specifications
    IEC GUIDE 104:2010 The preparation of safety publications and the use of basic safety publications and group safety publications
    IEC 61140:2016 Protection against electric shock - Common aspects for installation and equipment
    IEC 60309-1:1999+AMD1:2005+AMD2:2012 CSV Plugs, socket-outlets and couplers for industrial purposes - Part 1: General requirements
    IEC 61010-1:2010+AMD1:2016 CSV Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 1: General requirements
    IEC TS 60479-2:2007 Effects of current on human beings and livestock - Part 2: Special aspects
    IEC 62368-1:2014 Audio/video, information and communication technology equipment - Part 1: Safety requirements
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