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  • BS 923-1(1990) : 1990

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    GUIDE ON HIGH-VOLTAGE TESTING TECHNIQUES - GENERAL

    Available format(s):  Hardcopy, PDF

    Withdrawn date:  28-02-2011

    Language(s):  English

    Published date:  01-01-1990

    Publisher:  British Standards Institution

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

    Committees responsible
    National foreword
    Section 1: General
    1. Scope
    2. Object
    Section 2: General Definitions
    3. Impulses
    3.1 Lightning and switching impulses
    4. Characteristics related to disruptive discharge
          and test voltages
    4.1 Disruptive discharge
    4.2 Characteristics of the test voltage
    4.3 Disruptive discharge voltage of a test object
    4.4 Statistical characteristics of disruptive discharge
          voltages
    4.5 Withstand voltage of a test object
    4.6 Assured disruptive discharge voltage of a test
          object
    5. Classification of insulation in test objects
    5.1 External insulation
    5.2 Internal insulation
    5.3 Self-restoring insulation
    5.4 Non-self-restoring insulation
    Section 3: General requirements relating to test
    procedures and test objects
    6. General requirements for test procedures
    7. General arrangement of the test object
    8. Dry tests
    9. Wet tests
    9.1 Standard wet test procedure
    9.2 Traditional procedures for wet tests with
          alternating voltages
    10. Artificial pollution tests
    10.1 Preparation of test object
    10.2 Test procedures
    10.3 Degree of pollution
    11. Atmospheric conditions
    11.1 Standard reference atmosphere
    11.2 Atmospheric correction factors
    11.3 Wet tests, test under artificial pollution and
          combined tests
    11.4 Conflicting requirements for testing internal
          and external insulation
    11.5 Measurement of humidity
    Section 4: Tests with direct voltage
    12. Definitions for direct voltage tests
    12.1 Value of the test voltage
    12.2 Ripple
    13. Test voltage
    13.1 Requirements for the test voltage
    13.2 Generation of the test voltage
    13.3 Measurement of the test voltage
    13.4 Measurement of the test current
    14. Test procedures
    14.1 Withstand voltage tests
    14.2 Disruptive discharge voltage tests
    14.3 Assured disruptive discharge voltage tests
    Section 5: Tests with alternating voltage
    15. Definitions for alternating voltage tests
    15.1 Definitions for alternating voltage tests
    15.2 Peak value
    15.3 R.M.S. value
    16. Test voltage
    16.1 Requirements for the test voltage
    16.2 Generation of the test voltage
    16.3 Measurement of the test voltage
    17. Test procedures
    17.1 Withstand voltage tests
    17.2 Disruptive discharge voltage tests
    17.3 Assured disruptive discharge voltage tests
    Section 6: Tests with lightning impulse voltage
    18. Definitions for lightning impulse tests
    18.1 Definitions of general applicability
    18.2 Definitions applicable only to chopped impulses
    18.3 Voltage/time curves
    19. Test voltage
    19.1 Standard lightning impulse
    19.2 Tolerances
    19.3 Standard chopped lightning impulse
    19.4 Special lightning impulses
    19.5 Generation of the test voltage
    19.6 Measurement of the test voltage and determination
          of impulse shape
    19.7 Measurement of current during tests with impulse
          voltages
    20. Test procedures
    20.1 Withstand voltage tests
    20.2 Procedures for assured discharge voltage tests
    Section 7: Tests with switching impulses
    21. Definitions for switching impulse tests
    21.1 Switching impulse
    21.2 Value of the test voltage
    21.3 Time to peak Tp
    21.4 Time to half-value T2
    21.5 Time above 90% Td
    21.6 Time to zero To
    21.7 Time to chopping Tc
    21.8 Linearly rising impulse
    22. Test voltage
    22.1 Standard switching impulse
    22.2 Tolerances
    22.3 Special switching impulses
    22.4 Generation of the test voltage
    22.5 Measurement of test voltage and determination of
          impulse shape
    23. Test procedures
    Section 8: Tests with impulse current
    24. Definitions for impulse current tests
    24.1 Impulse current
    24.2 Value of the test current
    24.3 Front time T1
    24.4 Virtual origin O1
    24.5 Time to half-value T2
    24.6 Duration of peak of a rectangular impulse
          current Td
    24.7 Total duration of a rectangular impulse current Tt
    25. Test current
    25.1 Standard impulse currents
    25.2 Tolerances
    25.3 Measurement of the test current
    25.4 Measurement of voltage during tests with impulse
          current
    Section 9: Combined and composite tests
    26. Combined voltage tests
    26.1 Value of the test voltage U
    26.2 Time delay triangle t
    26.3 Actual voltage shapes
    26.4 Arrangement of the test object
    26.5 Atmospheric correction factors
    27. Composite tests
    Appendix A: Statistical treatment of test results
    A.1 Classification of tests
    A.1.1 Class 1: Multiple-level tests
    A.1.2 Class 2: Up-and-down tests
    A.1.3 Class 3: Successive discharge tests
    A.2 Statistical behaviour of disruptive discharge
    A.2.1 Confidence limits and statistical error
    A.3 Analysis of test results
    A.3.1 Treatment of results from Class 1 tests
    A.3.2 Treatment of results from Class 2 tests
    A.3.3.Treatment of results from Class 3 tests
    A.4 Application of likelihood methods
    A.4.1 The likelihood function
    A.4.2 Estimation of U50 and z
    Appendix B: Pollution test procedures
    B.1 Production of salt fog
    B.1.1 Preparation of salt solution
    B.1.2 Details of spraying system
    B.2 Pre-deposition of pollution, coating and wetting
          procedure
    B.2.1 Preparation of coating material
    B.2.2 Main characteristics of the inert materials
    B.2.3 Solid coating and wetting procedure
    B.3 Measurement of the degree of pollution
    B.3.1 Surface conductivity of the insulating surface
    B.3.2 Equivalent amount of sodium chloride per square
          centimetre of the insulating surface (S.D.D. mg/
          cm squared)
    Appendix C: Calibration of a non-approved measurement
    device with a rod/rod gap
    C.1 General arrangement of a rod/rod gap
    C.2 Reference values
    C.3 Calibration procedure
    Figures

    Abstract - (Show below) - (Hide below)

    Applies to dielectric tests with direct voltage, alternating voltage and impulse voltage, tests with impulse current and tests with combinations of the above. Applicable only to tests on equipment with highest voltage for equipment Um above 1 kV. Not designed for electromagnetic compatibility tests on electric or electronic equipment.

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

    Committee PEL/42
    Development Note Supersedes 87/20861 DC, BS 923-1(1980) and BS 923-2(1980). (10/2005) Reviewed and confirmed by BSI, June 2007. (05/2007)
    Document Type Standard
    Publisher British Standards Institution
    Status Withdrawn
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS 7657(2010) : 2010 SPECIFICATION FOR CUT-OUT ASSEMBLIES UP TO 100 A RATING, FOR POWER SUPPLY TO BUILDINGS
    BS 7835(1996) : 1996 SPECIFICATION FOR CABLES WITH EXTRUDED CROSS-LINKED POLYETHYLENE OR ETHYLENE PROPYLENE RUBBER INSULATION FOR RATED VOLTAGES FROM 3800/6600 V UP TO 19000/33000 V HAVING LOW EMISSION OF SMOKE AND CORROSIVE GASES WHEN AFFECTED BY FIRE
    BS 7888-3(1998) : 1998 LV AND MV ACCESSORIES FOR POWER CABLES WITH RATED VOLTAGE FROM 0.6/1 KV (U[M] = 1.2 KV) UP TO AND INCLUDING 20.8/36 KV (U[M] = 42 KV) - PART 3: TEST REQUIREMENTS FOR LV ACCESSORIES
    BS 4177(1992) : 1992 SPECIFICATION FOR COOKER CONTROL UNITS
    BS 5760-13.2:1993 RELIABILITY OF SYSTEMS, EQUIPMENT AND COMPONENTS - GUIDE TO RELIABILITY TEST CONDITIONS FOR CONSUMER EQUIPMENT - CONDITIONS PROVIDING A HIGH DEGREE OF SIMULATION FOR EQUIPMENT FOR STATIONARY USE IN WEATHERPROTECTED LOCATIONS
    09/30181290 DC : 0 BS 7654 - SPECIFICATION FOR SINGLE-PHASE STREET LIGHTING FUSES (CUT-OUTS) FOR LOW-VOLTAGE PUBLIC ELECTRICITY DISTRIBUTION SYSTEMS - 25 A RATING FOR HIGHWAY POWER SUPPLIES AND STREET FURNITURE
    BS 7654(2010) : 2010 SPECIFICATION FOR SINGLE-PHASE STREET LIGHTING CUT-OUT ASSEMBLIES FOR LOW-VOLTAGE PUBLIC ELECTRICITY DISTRIBUTION SYSTEMS - 25 A RATING FOR HIGHWAY POWER SUPPLIES AND STREET FURNITURE
    BS 7888-1(1998) : 1998 LV AND MV ACCESSORIES FOR POWER CABLES WITH RATED VOLTAGE FROM 0.6/1 KV (U[M] = 1.2 KV) UP TO AND INCLUDING 20.8/36 KV (U[M] = 42 KV) - PART 1: GENERAL
    13/30283398 DC : 0 BS 7656+A1 - SPECIFICATION FOR LOW-VOLTAGE POLE-MOUNTING FUSES (CUT-OUTS) - 315 ARATING
    BS 7744(1994) : 1994 GUIDE TO ARTIFICIAL POLLUTION TESTS ON HIGH VOLTAGE INSULATORS TO BE USED ON D.C. SYSTEMS
    ENA TS 12-20 : ISSUE 1 COR 1 1986 LOW VOLTAGE POLE-MOUNTED FUSES
    BS EN 61037 : 1993 ELECTRICITY METERING - TARIFF AND LOAD CONTROL - PARTICULAR REQUIREMENTS FOR ELECTRONIC RIPPLE CONTROL RECEIVERS
    09/30202852 DC : 0 BS 5733 - GENERAL REQUIREMENTS FOR ELECTRICAL ACCESSORIES - SPECIFICATION
    BS QC 400000:1990 HARMONIZED SYSTEM OF QUALITY ASSESSMENT FOR ELECTRONIC COMPONENTS - FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT: GENERIC SPECIFICATION
    ESI 12-20 : ISSUE 1 LOW VOLTAGE POLE-MOUNTED FUSES
    BS EN 61011 : 1993 ELECTRIC FENCE ENERGIZERS - SAFETY REQUIREMENTS FOR MAINS-OPERATED ELECTRIC FENCE ENERGIZERS
    BS 7654(1993) : 1993 SPECIFICATION FOR SINGLE PHASE STREET LIGHTING FUSES (CUT OUTS) FOR LOW VOLTAGE PUBLIC ELECTRICITY DISTRIBUTION SYSTEMS - 25 A RATING FOR HIGHWAY POWER SUPPLIES AND STREET FURNITURE
    BS 7835(2000) : 2000 SPECIFICATION FOR ARMOURED CABLES WITH EXTRUDED CROSS-LINKED POLYETHYLENE OR ETHYLENE PROPYLENE RUBBER INSULATION FOR RATED VOLTAGES FROM 3.8/6.6 KV UP TO 19/33 KV HAVING LOW EMISSION OF SMOKE AND CORROSIVE GASES WHEN AFFECTED BY FIRE
    BS EN 60343 : 1993 RECOMMENDED TEST METHODS FOR DETERMINING THE RELATIVE RESISTANCE OF INSULATING MATERIALS TO BREAKDOWN BY SURFACE DISCHARGES
    BS EN 60156 : 1996 INSULATING LIQUIDS - DETERMINATION OF THE BREAKDOWN VOLTAGE AT POWER FREQUENCY
    BS EN 61219 : 1994 LIVE WORKING - EARTHING OR EARTHING AND SHORT CIRCUITING EQUIPMENT USING LANCES AS A SHORT CIRCUITING DEVICE - LANCE EARTHING
    BS 7657:1993 SPECIFICATION FOR FUSES (CUT-OUTS), ANCILLARY TERMINAL BLOCKS AND INTERCONNECTING UNITS UP TO 100 A RATING, FOR POWER SUPPLIES TO BUILDINGS
    BS 6883(1999) : 1999 ELASTOMER INSULATED CABLES FOR FIXED WIRING IN SHIPS AND ON MOBILE AND FIXED OFFSHORE UNITS - REQUIREMENTS AND TEST METHODS
    BS EN 116000-3:1996 Harmonized system of quality assessment for electronic components. Generic specification: electromechanical all-or-nothing relays Test and measurement procedures
    BS EN 60521 : 1995 CLASS 0,5, 1 AND 2 ALTERNATING-CURRENT WATTHOUR METERS
    BS 7870-2(1999) : 1999 LV AND MV POLYMERIC INSULATED CABLES FOR USE BY DISTRIBUTION AND GENERATION UTILITIES - PART 2: METHODS OF TEST
    15/30297240 DC : 0 BS 1363-5 - 13 A PLUGS, SOCKET-OUTLETS, ADAPTORS AND CONNECTION UNITS - PART 5: SPECIFICATION FOR FUSED CONVERSION PLUGS
    BS 7833(1995) : 1995 SPECIFICATION FOR FIREFIGHTERS' AXES WITH GLASS FIBRE SHAFTS
    BS EN 61325 : 1996 INSULATORS FOR OVERHEAD LINES WITH A NOMINAL VOLTAGE ABOVE 1000 V - CERAMIC OR GLASS INSULATOR UNITS FOR D.C. SYSTEMS - DEFINITIONS, TEST METHODS AND ACCEPTANCE CRITERIA
    BS EN 61000-5-5 : 1996
    07/30160901 DC : DRAFT MAR 2007 BS 4177 AMD 4 - SPECIFICATION FOR COOKER CONTROL UNITS
    BS 1363-5:2008 13 A PLUGS, SOCKET-OUTLETS, ADAPTORS AND CONNECTION UNITS - PART 5: SPECIFICATION FOR FUSED CONVERSION PLUGS
    BS EN 61268 : 1996 ALTERNATING CURRENT STATIC VAR-HOUR METERS FOR REACTIVE ENERGY (CLASSES 2 AND 3)
    BS 6622(1999) : 1999 SPECIFICATION FOR CABLES WITH EXTRUDED CROSS-LINKED POLYETHYLENE OR ETHYLENE PROPYLENE RUBBER INSULATION FOR RATED VOLTAGES FROM 3.8/6.6 KV UP TO 19/33 KV
    BS EN 60383-2 : 1995 INSULATORS FOR OVERHEAD LINES WITH A NOMINAL VOLTAGE ABOVE 1000 V - INSULATOR STRINGS AND INSULATOR SETS FOR A.C. SYSTEMS - DEFINITIONS, TEST METHODS AND ACCEPTANCE CRITERIA
    BS 5049-2(1994) : 1994 RADIO INTERFERENCE CHARACTERISTICS OF OVERHEAD POWER LINES AND HIGH-VOLTAGE EQUIPMENT - METHODS OF MEASUREMENT AND PROCEDURE FOR DETERMINING LIMITS
    DD ENV 61072:1995 METHODS OF TEST FOR EVALUATING THE RESISTANCE OF INSULATING MATERIALS AGAINST THE INITIATION OF ELECTRICAL TREES
    AOP 25 : 1999 RATIONALE AND GUIDANCE CONCERNING STANAG 4327, LIGHTNING, MUNITION ASSESSMENT AND TEST PROCEDURES
    BS 7656(1993) : 1993 SPECIFICATION FOR LOW-VOLTAGE POLE-MOUNTING FUSES (CUT-OUTS) - 400 A RATING
    EN 60383-2 : 1995 INSULATORS FOR OVERHEAD LINES WITH A NOMINAL VOLTAGE ABOVE 1000 V - INSULATOR STRINGS AND INSULATOR SETS FOR A.C. SYSTEMS - DEFINITIONS, TEST METHODS AND ACCEPTANCE CRITERIA
    BS EN 60071-2:1997 (published 1997-04) Insulation co-ordination Application guide
    BS 5733(2010) : 2010 GENERAL REQUIREMENTS FOR ELECTRICAL ACCESSORIES - SPECIFICATION
    BS 7888-2(1998) : 1998 LV AND MV ACCESSORIES FOR POWER CABLES WITH RATED VOLTAGE FROM 0.6/1 KV (U[M] = 1.2 KV) UP TO AND INCLUDING 20.8/36 KV (U[M] = 42 KV) - PART 2: METHODS OF TEST
    09/30181298 DC : 0 BS 7657 - SPECIFICATION FOR FUSES (CUT-OUTS), ANCILLARY TERMINAL BLOCKS AND INTERCONNECTING UNITS UP TO 100 A RATING, FOR POWER SUPPLIES TO BUILDINGS
    BS EN 61330 : 1996 HIGH-VOLTAGE/LOW-VOLTAGE PREFABRICATED SUBSTATIONS
    BS 5733(2010) : 2010 GENERAL REQUIREMENTS FOR ELECTRICAL ACCESSORIES - SPECIFICATION
    BS 7657:2010 (published 2010-02) Specification for cut-out assemblies up to 100 A rating, for power supply to buildings
    BS 7870-2:1999 LV AND MV POLYMERIC INSULATED CABLES FOR USE BY DISTRIBUTION AND GENERATION UTILITIES - PART 2: METHODS OF TEST

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

    BS 4828(1985) : 1985 GUIDE FOR PARTIAL DISCHARGE MEASUREMENTS
    BS 923-2(1980) : 1980 GUIDE ON HIGH-VOLTAGE TESTING TECHNIQUES - TEST PROCEDURES
    BS 923-3(1980) : 1980 GUIDE ON HIGH-VOLTAGE TESTING TECHNIQUES - MEASURING DEVICES
    BS 923-4(1980) : 1980 GUIDE ON HIGH-VOLTAGE TESTING TECHNIQUES - APPLICATION GUIDE FOR MEASURING DEVICES
    BS 358(1960) : 1960 METHOD FOR THE MEASUREMENT OF VOLTAGE WITH SPHERE-GAPS (ONE SPHERE EARTHED)
    IEC 60507:2013 Artificial pollution tests on high-voltage ceramic and glass insulators to be used on a.c. systems
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