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GB 20044-2012 PDF English

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GB 20044-2012: [GB/T 20044-2012] Electrical accessories -- Portable residual current devices without integral overcurrent protection for household and similar use (PRCD)
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Status: Valid

GB 20044: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] deliveryName of Chinese StandardStatus
GB 20044-2012English285 Add to Cart 0-9 seconds. Auto-delivery [GB/T 20044-2012] Electrical accessories -- Portable residual current devices without integral overcurrent protection for household and similar use (PRCD) Valid
GB 20044-2005EnglishRFQ ASK 14 days Electrical accessories -- Portable residual current devices without integral overcurrent protection for household and similar use (PRCDs) Obsolete

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GB 20044-2012: [GB/T 20044-2012] Electrical accessories -- Portable residual current devices without integral overcurrent protection for household and similar use (PRCD)


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NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA Replacing GB 20044-2005 Electrical Accessories - Portable Residual Current Devices without Integral Overcurrent Protection for Household and Similar Use (PRCD) (IEC 61540. 1999, MOD) Issued on: DECEMBER 31, 2012 Implemented on: DECEMBER 1, 2013 Jointly Issued by General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ); Standardization Administration (SAC) of the People's Republic of China. GB

Table of Contents

Foreword ... I 1 Scope .. 1 2 Normative References .. 2 3 Terminologies and Definitions ... 3 3.1 Definitions Relating to Plugs and Socket-outlets ... 3 3.2 Definitions Relating to Residual Current Devices ... 5 3.3 Definitions Relating to Tests ... 11 4 Classification ... 11 4.1 According to the Type of Connection and Application ... 11 4.2 According to the Type of Terminals ... 12 4.3 According to the Method of Operation ... 12 4.4 According to the Working Condition of Residual Current Comprising a D.C. Component ... 12 4.5 According to the Ambient Air Temperature ... 12 5 Characteristics of PRCDs ... 12 5.1 Summary of Characteristics ... 12 5.2 Rated Quantities and Other Characteristics ... 13 5.3 Standard and Preferred Values ... 14 5.4 Coordination with Short-circuit Protective Devices (SCPDs) ... 14 6 Marking and Other Product Information ... 15 6.1 Each PRCD Shall be Marked in a Durable Manner with the Following Data .. 15 6.2 An Instruction Shall be Provided with the Following Information .. 17 7 Standard Conditions for Operation in Service and for Installation ... 17 7.1 Standard Conditions ... 17 7.2 Conditions for Installations .. 18 8 Requirements for Construction and Operation ... 18 8.1 Mechanical Design .. 18 8.2 Protection Against Electric Shock .. 28 8.3 Dielectric Properties ... 30 8.4 Temperature Rise ... 30 8.5 Operating Characteristic ... 30 8.6 Mechanical and Electrical Endurance ... 30 8.7 Performance at Short-circuit Currents .. 30 8.8 Resistance to Mechanical Shock and Impact ... 30 8.9 Resistance to Heat ... 30 8.10 Resistance to Abnormal Heat and to Fire ... 31 8.11 Test Device .. 31 8.12 Requirements for PRCDs Functionally Dependent on Line Voltage ... 31 8.13 Behavior of PRCDs in Case of Overcurrent in the Main Circuit ... 31 8.14 Resistance of PRCDs Against Unwanted Tripping Due to Surge Currents to Earth Resulting from Impulse Voltages .. 31 8.15 Behavior of PRCDs in Case of an Earth Fault Current Comprising a D.C. Component ... 31 8.16 Reliability... 31 8.17 Resistance to Tracking ... 32 8.18 Electromagnetic Compatibility (EMC) .. 32 9 Tests .. 32 9.1 General ... 32 9.2 Test Conditions ... 32 9.3 Test of Indelibility of Marking ... 34 9.4 Test of Reliability of Screws, Current-carrying Parts and Connections .. 34 9.5 Test of Reliability of Terminals for External Conductors ... 35 9.6 Verification of Protection Against Electric Shock ... 36 9.7 Test of Dielectric Properties ... 37 9.8 Temperature-rise Test .. 39 9.9 Verification of the Operating Characteristic ... 40 9.10 Verification of Mechanical and Electrical Endurance ... 43 9.11 Verification of the Behavior of PRCD under overcurrent Conditions ... 45 9.12 Verification of Resistance to Mechanical Vibration and Impact ... 51 9.13 Heat Resistance Test ... 53 9.14 Tests for Resistance of Insulating Material to Abnormal Heating and Fire ... 54 9.15 Verification of the Trip-free Mechanism ... 55 9.16 Verification of the Test Device ... 55 9.17 Verification of the Behavior of PRCDs Functionally Dependent on Line Voltage, Classified under 4.3.2 in case of Fault of the Line Voltage .. 56 9.18 Verification of Limiting Values of the Non-operating Current under Overcurrent Conditions ... 57 9.19 Verification of Resistance against Unwanted Tripping due to Surge Currents to Earth Resulting from Impulse Voltages for PRCDs of I∆n≥0.010A ... 57 9.20 Verification of Resistance of the PRCD against Impulse Voltages ... 58 9.21 Verification of the Correct Operation with Residual Current having DC Component ... 58 9.22 Verification of Reliability .. 59 9.23 Verification of Ageing .. 62 9.24 Resistance to Tracking ... 62 9.25 Verification of the Effects of Strain on the Conductors ... 63 9.26 Verification of the Torque Exerted by Plug-in PRCDs on Fixed Socket-outlets .. 63 9.27 Tests of the Cable Anchorage ... 63 9.28 Flexing Test of Non-rewirable PRCDs .. 64 9.29 Verification of the Electromagnetic Compatibility (EMC) ... 65 9.30 Tests Replacing Verifications of Creepage Distances and Clearances for Electronic Circuits Connected between Active Conductors (Phases and Neutral) and/or between Active Conductors and the Earth Circuit when the Contacts are in the Closed Position . 66 9.31 Requirements for Capacitors and Specific Resistors and Inductors Used in Electronic Circuits Connected between Active Conductors (Phases and Neutral) and/or between Active Conductors and the Earth Circuit when the Contacts are in the Closed Position... 69 Appendix A (Normative) Test Sequences and Number of Samples to be Submitted for Verification of Conformity to This Standard ... 90 A.1 Verification of Conformity .. 90 A.2 Test Sequences ... 90 A.3 Number of Samples to be Submitted for Full Test Sequence... 90 A.4 Number of Samples to be Submitted for Simplified Test Sequences in case of Submitting Simultaneously a Range of PRCDs of the Same Fundamental Design .. 90 Appendix B (Normative) Routine Tests ... 98 B.1 Tripping Test ... 98 B.2 Electric Strength Test ... 98 B.3 Performance of the Test Device .. 98 B.4 Stray Wire Test ... 98 B.5 Correct Continuity Test ... 98 Appendix C (Normative) Determination of Clearances and Creepage Distances .. 100 Figure 1 Examples of Types of Connection Classified According to 4.1 ... 70 Figure 2 Standard Test Finger... 71 Figure 3 Gauge for Checking Non-accessibility of Live Components through Shutters and of Live Components of Socket-outlets with Increased Protection .. 72 Figure 4 Test Circuit for the Verification of the Following Items ... 73 Figure 5 Test Circuit for the Verification of the Correct Operation of PRCDs, in the Case of Residual Pulsating Direct Currents ... 76 Figure 6 Test Circuit for the Verification of the Correct Operation of PRCDs, in the Case of Residual Pulsating Direct Currents Superimposed by a Smooth Direct Current ... 77 Figure 7 Example of Device for Breaking Capacity and Normal Operation Tests .. 78 Figure 8 Circuit Diagrams for Breaking Capacity and Normal Operation Tests ... 79 Figure 9 Gauge for Checking Non-accessibility of Live Components of Socket-outlets, through Shutters, after Normal Operation Test ... 79 Figure 10 Test Circuit for the Verification of the Rated Making and Breaking Capacity and of the Coordination .. 80 Figure 11 Tumbling Barrel ... 81 Figure 12 Compression Test Device .. 81 Figure 13 Ball-pressure Test Device ... 81 Figure 14 Arrangement and Dimensions of the Electrodes for the Tracking Test ... 82 Figure 15 Device for Testing the Cable Retention ... 82 Figure 16 Device for Flexing Test .. 83 Figure 17 Arrangement for Mechanical Strength Test on PRCDs Provided with Cables (9.12.4) ... 83 Figure 18 Test Device for the Verification of the Minimum I2t and Ip Values to be Withstood by the PRCD [9.11.2.1 a)] ... 84 Figure 19 Stabilizing Period for Reliability Test (9.22.1.3) ... 85 Figure 20 Reliability Test Cycle (9.22.1.3) .. 86 Figure 21 Example for Test Circuit for Verification of Ageing of Electronic Components (9.23) ... 86 Figure 22 a) Current Ring Wave 0.5μs/100kHz ... 87 Figure 22 b) Example of Test Circuit for the Verification of Resistance to Unwanted Tripping .. 88 Figure 23 Minimum Creepage Distances and Clearances as a Function of Peak Value of Voltage ... 88 Figure 24 Minimum Creepage Distances and Clearances as a Function of Peak Value of Operating Voltage ... 89 Figure 25 Low-temperature Test Cycle ... 89 Table 1 Standard Values of Rated Current and Corresponding Preferred Values of Rated Voltages .. 14 Table 2 Standard Values of Break Time for A.C. Residual Currents ... 14 Table 3 Standard Conditions for Operation in Service .. 18 Table 4 Minimum Cross-sectional Area of Flexible Cable Suitable for Non-rewirable Plugs and Non-rewirable Socket-outlets of PRCDs .. 23 Table 5 Clearances and Creepage Distances ... 25 Table 6 Connectable Cross-sections of Copper Conductors for Screw-type Terminals ... 27 Table 7 Degree of Protection of PRCD Parts .. 29 Table 8 Temperature-rise Values ... 30 Table 9 Type Test .. 33 Table 10 Cross-sectional Area for Test Conductor ... 34 Table 11 Screw ... ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.

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