Low-voltage surge protective devices - Part 11: Surge protective devices connected to low-voltage power systems - Requirements and test methods

IEC 61643-11:2011 is applicable to devices for surge protection against indirect and direct effects of lightning or other transient overvoltages. These devices are packaged to be connected to 50/60 Hz a.c. power circuits, and equipment rated up to 1 000 V r.m.s. Performance characteristics, standard methods for testing and ratings are established. These devices contain at least one nonlinear component and are intended to limit surge voltages and divert surge currents. This first edition of IEC 61643-11 cancels and replaces the second edition of IEC 61643-1 published in 2005. The main changes with respect of the second edition of IEC 61643-1 are the complete restructuring and improvement of the test procedures and test sequences. NOTE: The attention of National Committees is drawn to the fact that equipment manufacturers and testing organizations may need a transitional period following publication of a new, amended or revised IEC publication in which to make products in accordance with the new requirements and to equip themselves for conducting new or revised tests. It is the recommendation of the committee that the content of this publication be adopted for national implementation not earlier than 12 months from the date of publication. In the meantime, the previous edition can still be ordered by contacting your local IEC member National Committee or the IEC Central Office.

Parafoudres basse tension - Partie 11: Parafoudres connectés aux systèmes basse tension - Exigences et méthodes d'essai

La CEI 61643-11:2011 est applicable aux dispositifs de protection contre les effets indirects et directs de la foudre ou contre les surtensions transitoires. Ces dispositifs sont conçus pour être connectés à des circuits sous tension alternative 50/60 Hz et à des équipements de tension assignée efficace allant jusqu'à 1 000 V efficace. Sont définies les caractéristiques de fonctionnement, les méthodes normalisées d'essai ainsi que les valeurs assignées applicables. Ces dispositifs comportent au moins un composant non linéaire et sont utilisés pour limiter les surtensions et écouler les courants de foudre. Cette première édition de la CEI 61643-11 annule et remplace la deuxième édition de la CEI 61643-1 parue en 2005. Les modifications principales par rapport à la deuxième édition de la CEI 61643-1 sont une restructuration complète et l'adaptation des procédures et séquences d'essai. NOTE: L'attention des Comités Nationaux est attirée sur le fait que les fabricants d'appareils et les organismes d'essai peuvent avoir besoin d'une période transitoire après la publication d'une nouvelle publication CEI, ou d'une publication amendée ou révisée, pour fabriquer des produits conformes aux nouvelles exigences et pour adapter leurs équipements aux nouveaux essais ou aux essais révisés. Le comité recommande que le contenu de cette publication soit entériné au niveau national au plus tôt 12 mois après la date de publication. Dans l'intervalle, l'édition précédente peut encore être commandée en communiquant avec le membre de votre local CEI Comité National ou le Bureau Central de la CEI.

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Status
Published
Publication Date
08-Mar-2011
Current Stage
PPUB - Publication issued
Start Date
09-Mar-2011
Completion Date
09-Mar-2011
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IEC 61643-11
Edition 1.0 2011-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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
IEC 61643-11:2011
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61643-11
Edition 1.0 2011-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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
PRICE CODE
INTERNATIONALE
CODE PRIX XD
ICS 29.240; 29.240.10 ISBN 978-2-88912-350-6
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 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

---------------------- Page: 4 ----------------------
61643-11  IEC:2011 – 3 –

6 Preferred values for SPD ................................................................................................ 20

6.1 Preferred values of impulse discharge current I for class I tests ........................ 20

imp

6.2 Preferred values of nominal discharge current for class II tests I .......................... 20

6.3 Preferred values of open-circuit voltage for class III tests U ............................... 20

6.4 Preferred values of voltage protection level U ...................................................... 20

6.5 Preferred values of r.m.s. maximum continuous operating voltage U .................... 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 I .................................................................................. 23

7.2.3 Voltage protection level U ........................................................................ 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

---------------------- Page: 5 ----------------------
– 4 – 61643-11  IEC:2011

8.3.1 Protection against direct contact ................................................................ 40

8.3.2 Residual current I .................................................................................. 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 U ............................................. 81

REF

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

---------------------- Page: 6 ----------------------
61643-11  IEC:2011 – 5 –

Figure 5 – Flow chart of testing to check the voltage protection level U ............................... 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 I 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 – Tests to be performed to determine the measured limiting voltage ........................ 43

Table 8 – Prospective short-circuit current and power factor ................................................. 50

Table 9 – Dielectric withstand ............................................................................................... 55

Table 10 – Screw thread diameters and applied torques ....................................................... 61

Table 11 – Cross-sections of copper conductors for screw-type or screwless terminals ........ 62

Table 12 – Pulling forces (screw terminals) ........................................................................... 63

Table 13 – Conductor dimensions ......................................................................................... 63

Table 14 – Pulling forces (screwless terminals) .................................................................... 64

Table 15 – Air clearances for SPDs ...................................................................................... 66

Table 16 – Creepage distances for SPDs .............................................................................. 67

Table 17 – Relationship between material groups and classifications .................................... 68

Table 18 – Fall distances for impact requirements ................................................................ 71

Table 19 – Test conductors for rated load current test .......................................................... 75

---------------------- Page: 7 ----------------------
– 6 – 61643-11  IEC:2011

Table 20 – Current factor k for overload behaviour ............................................................... 76

Table 21 – Tolerances for proportional surge currents .......................................................... 79

Table A.1 – Reference test voltage values ............................................................................ 82

Table B.1 – TOV test values for systems complying with IEC 60364 series ........................... 86

Table B.2 – TOV test parameters for North American systems .............................................. 87

Table B.3 – TOV test parameters for Japanese systems ....................................................... 88

Table D.1 – Reduced test procedure for SPDs complying with IEC 61643-1:2005 ................. 92

Table G.1 – Temperature-rise limits ...................................................................................... 96

---------------------- Page: 8 ----------------------
61643-11  IEC:2011 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SURGE PROTECTIVE DEVICES –
Part 11: Surge protective devices connected
to low-voltage power systems –
Requirements and test methods
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