• I.S. EN 50178:1998

    Withdrawn A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.


    Available format(s):  Hardcopy, PDF

    Withdrawn date:  28-08-2015

    Language(s):  English

    Published date:  10-07-1998

    Publisher:  National Standards Authority of Ireland

    For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
    Only cited Standards give presumption of conformance to New Approach Directives/Regulations.

    Dates of withdrawal of national standards are available from NSAI.

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

    1 Scope
    2 Normative references
    3 Definitions
    4 Requirements
        4.1 Normal function
        4.2 Damage to persons or material
        4.3 EE connected to unearthed supply mains under
              conditions of earth fault
        4.4 Earthing requirements (grounding, earthing
              and screening)
        4.5 Wires and cables for interconnection
        4.6 Fuses in neutral and protective conductors
    5 Safety requirements
        5.1 General requirements
        5.2 Requirements for EE with regard to protection
              against electric shock
        5.3 Requirements for EEs in installations with regard
              to protection against electric shock
    6 Environmental requirements and conditions
        6.1 Climatic conditions
        6.2 Mechanical requirements (general)
        6.3 Electrical and electromagnetic requirements
    7 Requirements for electronic equipment
        7.1 Design and construction
        7.2 Marking, identification, documentation
    8 Requirements for the assembly of EE(s) in power
        8.1 General
        8.2 Fitting tolerances after assembly
        8.3 Supply mains
    9 Testing
        9.1 General
        9.2 Compliance with this European Standard
        9.3 Overview of tests
        9.4 Performance of the tests
    Annex A (informative) Additional information
        A.2 Bibliography
        A.4 Requirements for entire system
        A.5 Safety requirements
        A.6 Environmental requirements and conditions
        A.7 Requirements for electronic equipment
        A.8 Requirements for the assembly of EE(s) in power
        A.9 Testing
    Annex B (informative) Tables and figures
    1 Arrangement of fuses in sub-assemblies and in
    2 Functional summary of protective measures against
        electric shock
    3 Examples for protection against direct contact
    4 Flow chart leading to requirements when using EE(s)
        behind an RCD
    5 Typical waveform for case a)a.c. voltage
    6 Typical waveform for case b)d.c. voltage
    7 Typical waveform for case c)pulsating voltage
    8 Determination of insulation within a circuit
    9 Determination of insulation between live parts and
        accessible surfaces
    10 Determination of insulation between circuits and
        environment and of insulation between circuits
    11 Determination of functional insulation
    12 Determination of basic insulation
    13 Determination of double or reinforced insulation
    14 Protective separation (with the respective subclauses
        in parentheses)
    15 Clearances and creepage distances for protective
    16 Voltage test procedure
    A.1 Examples for protection in the case of direct contact
    A.2 Fault-current in connections with semiconductor devices
    A.3 Planning example for application of RCD Type B
    A.4 Examples of sub-divided insulation against accessible
        surfaces of EE
    A.5 Examples for the insulation of control elements
    A.6 Examples for the design of clearances (continued)
    A.7 Correlation between humidity and temperature of the air
    A.8 Periodical momentary dips of a.c. mains voltage caused
        by convertors
    A.9 Insulation displacement connection with flat cable
    A.10Test set-up for EE grounded via a dedicated earthing
    A.11Test set-up for EE grounded via the power cord
    A.12Application of the test voltage to a single port and
        to grouping of ports
    1 Summary of the limits of the decisive voltage UM
    2 Definitions of pollution degrees
    3 Clearances between mains-circuits and their environment
    4 Clearances between non-mains-circuits and their
    5 Clearances within a circuit
    6 Minimum creepage distances
    7 Climatic conditions
    8 Heating of accessible parts
    9 General test conditions
    10 Overview of tests
    11 Dry heat test
    12 Damp heat test
    13 Topple test
    14 Vibration test
    15 Non-accessibility test
    16 Impulse voltage test
    17 Impulse test voltage
    18 A.c. or d.c. insulation test voltage
    19 Partial discharge test
    20 Minimum value of insulation resistance
    21 Short-circuit withstand capability
    A.1 Values of accessible capacitance and charging voltage
        (threshold of pain)
    A.2 Maximum concentration of corrosive gases

    Abstract - (Show below) - (Hide below)

    Applicable to the use of electronic equipment in power installations requiring a uniform technical level of safety and reliability. Specifies the minimum requirements for the design and manufacture of EE, to protect against electric shock, for testing and integrating into systems for power installations.

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

    Development Note 1998 Edition is Partially Superseded by I.S. EN 62477-1. (07/2017)
    Document Type Standard
    Publisher National Standards Authority of Ireland
    Status Withdrawn
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