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IEC 61643-11 Edition 1.0 2011-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Lo

IEC 61643-11 Edition 1.0 2011-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Low-voltage surge protective devices – Part 11: Surge protective devices connected to low-voltage power systems – Requirements and test methods Parafoudres basse tension – Partie 11: Parafoudres connectés aux systèmes basse tension – Exigences et méthodes d'essai INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XD ICS 29.240; 29.240.10 PRICE CODE CODE PRIX ISBN 978-2-88912-350-6 ® Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale ® colour inside This is a preview - click here to buy the full publication – 2 – 61643-11  IEC:2011 CONTENTS FOREWORD ........................................................................................................................... 7 INTRODUCTION ..................................................................................................................... 9 1 Scope ............................................................................................................................. 10 2 Normative references ..................................................................................................... 10 3 Terms, definitions and abbreviations .............................................................................. 10 3.1 Terms and definitions ............................................................................................ 11 3.2 Abbreviations ........................................................................................................ 16 4 Service conditions .......................................................................................................... 18 4.1 Frequency ............................................................................................................. 18 4.2 Voltage .................................................................................................................. 18 4.3 Air pressure and altitude ....................................................................................... 18 4.4 Temperatures ........................................................................................................ 18 4.5 Humidity ................................................................................................................ 18 5 Classification .................................................................................................................. 18 5.1 Number of ports .................................................................................................... 18 5.1.1 One ........................................................................................................... 18 5.1.2 Two ........................................................................................................... 18 5.2 SPD design ........................................................................................................... 18 5.2.1 Voltage switching ...................................................................................... 18 5.2.2 Voltage limiting .......................................................................................... 18 5.2.3 Combination .............................................................................................. 18 5.3 Class I, II and III tests ........................................................................................... 18 5.4 Location ................................................................................................................ 19 5.4.1 Indoor ........................................................................................................ 19 5.4.2 Outdoor ..................................................................................................... 19 5.5 Accessibility .......................................................................................................... 19 5.5.1 Accessible ................................................................................................. 19 5.5.2 Inaccessible .............................................................................................. 19 5.6 Mounting method ................................................................................................... 19 5.6.1 Fixed ......................................................................................................... 19 5.6.2 Portable ..................................................................................................... 19 5.7 Disconnectors (including overcurrent protection) ................................................... 19 5.7.1 Location .................................................................................................... 19 5.7.2 Protection functions ................................................................................... 19 5.8 Degree of protection provided by enclosures ......................................................... 19 5.9 Temperature and humidity range ........................................................................... 20 5.9.1 Normal ...................................................................................................... 20 5.9.2 Extended ................................................................................................... 20 5.10 Power system ........................................................................................................ 20 5.10.1 AC between 47 Hz and 63 Hz .................................................................... 20 5.10.2 AC other than the range of 47 Hz to 63 Hz ................................................ 20 5.11 Multipole SPD ....................................................................................................... 20 5.12 SPD failure behaviour ........................................................................................... 20 5.12.1 open circuit (standard type SPD) ............................................................... 20 5.12.2 short-circuit (short-circuiting type SPD) ..................................................... 20 This is a preview - click here to buy the full publication 61643-11  IEC:2011 – 3 – 6 Preferred values for SPD ................................................................................................ 20 6.1 Preferred values of impulse discharge current Iimp for class I tests ........................ 20 6.2 Preferred values of nominal discharge current for class II tests In.......................... 20 6.3 Preferred values of open-circuit voltage for class III tests Uoc ............................... 20 6.4 Preferred values of voltage protection level Up ...................................................... 20 6.5 Preferred values of r.m.s. maximum continuous operating voltage Uc .................... 20 7 Requirements ................................................................................................................. 21 7.1 General requirements ............................................................................................ 21 7.1.1 Identification .............................................................................................. 21 7.1.2 Marking ..................................................................................................... 22 7.2 Electrical requirements .......................................................................................... 22 7.2.1 Protection against direct contact ................................................................ 22 7.2.2 Residual current IPE .................................................................................. 23 7.2.3 Voltage protection level Up ........................................................................ 23 7.2.4 Operating duty ........................................................................................... 23 7.2.5 Disconnectors and status indicators .......................................................... 23 7.2.6 Insulation resistance .................................................................................. 24 7.2.7 Dielectric withstand ................................................................................... 24 7.2.8 Behaviour under Temporary Overvoltages ................................................. 24 7.3 Mechanical requirements ....................................................................................... 25 7.3.1 Mounting ................................................................................................... 25 7.3.2 Screws, current carrying parts and connections ......................................... 25 7.3.3 External connections ................................................................................. 25 7.3.4 Air clearances and creepage distances...................................................... 27 7.3.5 Mechanical strength .................................................................................. 27 7.4 Environmental and material requirements .............................................................. 27 7.4.1 Protection provided by enclosure (IP code) ................................................ 27 7.4.2 Heat resistance ......................................................................................... 27 7.4.3 Fire resistance ........................................................................................... 27 7.4.4 Tracking resistance ................................................................................... 27 7.4.5 Electromagnetic compatibility .................................................................... 28 7.5 Additional requirements for specific SPD designs .................................................. 28 7.5.1 Two port SPDs and one port SPDs with separate input/output terminals ................................................................................................... 28 7.5.2 Environmental tests for outdoor SPDs ....................................................... 28 7.5.3 SPDs with separate isolated circuits .......................................................... 28 7.5.4 Short-circuiting type SPDs ......................................................................... 29 7.6 Additional requirements as may be declared by the manufacturer ......................... 29 7.6.1 One-port and two-port SPDs ...................................................................... 29 7.6.2 Two port SPDs only ................................................................................... 29 8 Type tests ...................................................................................................................... 29 8.1 General testing procedures ................................................................................... 30 8.1.1 Impulse discharge current used for class I additional duty test .................. 36 8.1.2 Current impulse used for class I and class II residual voltage and operating duty tests ................................................................................... 36 8.1.3 Voltage impulse used for class I and II sparkover tests .............................. 37 8.1.4 Combination wave used for class III tests .................................................. 37 8.2 Indelibility of markings ........................................................................................... 40 8.3 Electrical tests ....................................................................................................... 40 This is a preview - click here to buy the full publication – 4 – 61643-11  IEC:2011 8.3.1 Protection against direct contact ................................................................ 40 8.3.2 Residual current IPE .................................................................................. 40 8.3.3 Measured limiting voltage .......................................................................... 41 8.3.4 Operating duty test .................................................................................... 44 8.3.5 Disconnectors and safety performance of overstressed SPDs ................... 48 8.3.6 Insulation resistance .................................................................................. 54 8.3.7 Dielectric withstand ................................................................................... 55 8.3.8 Behaviour under Temporary Overvoltages (TOVs) ..................................... 56 8.4 Mechanical tests ................................................................................................... 60 8.4.1 Reliability of screws, current-carrying parts and connections ..................... 60 8.4.2 Terminals for external conductors .............................................................. 61 8.4.3 Verification of air clearances and creepage distances................................ 65 8.4.4 Mechanical strength .................................................................................. 68 8.5 Environmental and material tests........................................................................... 72 8.5.1 Resistance to ingress of solid objects and to harmful ingress of water ....... 72 8.5.2 Heat resistance ......................................................................................... 72 8.5.3 Ball pressure test ...................................................................................... 73 8.5.4 Resistance to abnormal heat and fire......................................................... 74 8.5.5 Tracking resistance ................................................................................... 75 8.6 Additional tests for specific SPD designs ............................................................... 75 8.6.1 Test for two-port SPDs and one-port SPDs with separate input/output terminals ................................................................................................... 75 8.6.2 Environmental tests for outdoor SPDs ....................................................... 78 8.6.3 SPDs with separate isolated circuits .......................................................... 78 8.6.4 Short-circuiting type SPDs ......................................................................... 78 8.7 Additional tests for specific performance if declared by the manufacturer .............. 78 8.7.1 Total discharge current test for multipole SPDs ......................................... 78 8.7.2 Test to determine the voltage drop ............................................................ 79 8.7.3 Load-side surge withstand capability ......................................................... 79 8.7.4 Measurement of voltage rate of rise du/dt .................................................. 80 9 Routine and acceptance tests ......................................................................................... 80 9.1 Routine tests ......................................................................................................... 80 9.2 Acceptance tests ................................................................................................... 80 Annex A (normative) Reference test voltages for SPDs UREF ............................................. 81 Annex B (normative) TOV Ratings ....................................................................................... 86 Annex C (normative) Tests to determine the presence of a switching component and the magnitude of the follow current ....................................................................................... 89 Annex D (normative) Reduced test procedures .................................................................... 91 Annex E (informative) Alternative circuits for testing SPDs under TOVs caused by faults in the high (medium) voltage system ........................................................................... 93 Annex F (informative) Environmental tests for outdoor SPDs ............................................... 94 Annex G (normative) Temperature rise limits ....................................................................... 96 Bibliography .......................................................................................................................... 97 Figure 1 – Metallic screen test set-up ................................................................................... 31 Figure 2 – Example of a decoupling network for single-phase power ..................................... 39 Figure 3 – Example of a decoupling network for three-phase power ...................................... 39 Figure 4 – Alternate test for the measured limiting voltage .................................................... 39 This is a preview - click here to buy the full publication 61643-11  IEC:2011 – 5 – Figure 5 – Flow chart of testing to check the voltage protection level Up ............................... 42 Figure 6 – Flow chart of the operating duty test .................................................................... 45 Figure 7 – Test set-up for operating duty test ........................................................................ 46 Figure 8 – Operating duty test timing diagram for test classes I and II .................................. 47 Figure 9 – Additional duty test timing diagram for test class I ................................................ 48 Figure 10 – Operating duty test timing diagram for test class III ............................................ 48 Figure 11 – Test circuit for SPD with Ifi lower than the declared short-circuit rating............... 52 Figure 12 – Test circuit for SPD’s failure mode simulation .................................................... 53 Figure 13 – Timing diagram for SPD’s failure mode simulation .............................................. 53 Figure 14 – Example of a test circuit to perform the test under TOVs caused by faults in the low voltage system ...................................................................................................... 57 Figure 15 – Timing diagram for the test under TOVs caused by faults in the low voltage system .................................................................................................................................. 57 Figure 16 – Example of circuit for testing SPDs for use in TT systems under TOVs caused by faults in high (medium) voltage system ................................................................ 59 Figure 17 – Timing diagram for use in testing SPDs under TOVs caused by faults in the high (medium) voltage system using circuit of Figure 16 ................................................. 60 Figure 18 – Test apparatus for impact test ............................................................................ 69 Figure 19 – Striking element of the pendulum hammer .......................................................... 70 Figure 20 – Ball thrust tester ................................................................................................. 73 Figure 21 – Loading rod for ball thrust tester......................................................................... 73 Figure 22 – Examples for appropriate test circuits of the load side short-circuit test(s) ......... 77 Figure E.1 – Examples of a three-phase and single-phase circuit for use in testing SPDs under TOVs caused by faults in the high (medium) voltage system ............................. 93 Table 1 – List of Abbreviations .............................................................................................. 17 Table 2 – Class I, II and III tests ........................................................................................... 19 Table 3 – Type test requirements for SPDs ........................................................................... 32 Table 4 – Common pass criteria for type tests ...................................................................... 34 Table 5 – Cross reference for pass criteria versus type tests ................................................ 35 Table 6 – Preferred parameters for class I test ..................................................................... 36 Table 7 uploads/S4/iec61643-1-2005-vn-ap-dung-cho-thiet-bi-chong-set-nguon-dien-ac.pdf