IEC 60252-1: 2010/2013 AC motor capacitors - Part 1 General - Performance, testing and rating - Safety requirements - Guidance for installation and operation (Full)
29 thg 11, 2024 | 15:02

IEC 60252-1: 2010/2013 AC motor capacitors - Part 1 General - Performance, testing and rating - Safety requirements - Guidance for installation and operation (Full)



IEC 60252-1:2010 applies to motor capacitors intended for connection to windings of asynchronous motors supplied from a single-phase system having a frequency up to and including 100 Hz, and to capacitors to be connected to three-phase asynchronous motors so that these motors may be supplied from a single-phase system. This standard covers impregnated or unimpregnated capacitors having a dielectric of paper, plastic film, or a combination of both, either metallized or with metal-foil electrodes, with rated voltages up to and including 660 V. This edition includes the following significant technical changes with respect to the previous edition:

- the definition of "segmented capacitors" has been added in 3.6;

- the definition of "classes of operation" has been clarified, with the addition of the concept of "probable life" with reference to statistics, in 3.9;

- the following wording "Operation above the rated voltage will reduce the life expectancy of the capacitor" has been introduced in 6.1.

- some clarifications have been added to Clause 8, Marking, mainly for small capacitors.


CONTENTS:


1  Scope and object ..............................................................................................................6

2  Normative references .......................................................................................................6

3  Terms and definitions .......................................................................................................7

4  Service conditions .......................................................................................................... 10

4.1  Normal service conditions ..................................................................................... 10

4.2  Preferred tolerances on capacitance ..................................................................... 11

5  Quality requirements and tests ....................................................................................... 11

5.1  Test requirements ................................................................................................. 11

5.1.1  General ..................................................................................................... 11

5.1.2  Test conditions .......................................................................................... 11

5.2  Nature of tests ....................................................................................................... 11

5.2.1  Type tests ................................................................................................. 11

5.2.2  Routine tests ............................................................................................. 12

5.3  Type tests ............................................................................................................. 12

5.3.1  Test procedure .......................................................................................... 12

5.3.2  Extent of qualification ................................................................................ 12

5.4  Routine tests ......................................................................................................... 14

5.4.1  Test procedure .......................................................................................... 14

5.5  Tangent of loss angle ............................................................................................ 14

5.6  Visual examination ................................................................................................ 14

5.7  Voltage test between terminals .............................................................................. 14

5.8  Voltage test between terminals and case ............................................................... 15

5.9  Capacitance measurement .................................................................................... 15

5.10  Check of dimensions ............................................................................................. 15

5.11  Mechanical tests ................................................................................................... 15

5.11.1  Robustness of terminations ....................................................................... 16

5.11.2  Soldering ................................................................................................... 16

5.11.3  Vibration .................................................................................................... 17

5.11.4  Fixing bolt or stud (if fitted) ........................................................................ 17

5.12  Sealing test ........................................................................................................... 17

5.13  Endurance test ...................................................................................................... 18

5.13.1  Testing in air with forced circulation ........................................................... 18

5.13.2  Endurance test procedure ..........................................................................18

5.13.3  Conditions of compliance ........................................................................... 19

5.14  Damp-heat test ...................................................................................................... 19

5.15  Self-healing test .................................................................................................... 19

5.16  Destruction test ..................................................................................................... 20

5.16.1  General ..................................................................................................... 20

5.16.12 Test specimens ......................................................................................... 21

5.16.23 Test apparatus for sequential DC and AC test (capacitor type S1 and 

S2) ............................................................................................................ 21

5.16.34 Test procedure apparatus for simultaneous DC and AC test 

(capacitor type S3) .................................................................................... 23

5.16.5  Test procedure for sequential DC and AC test (capacitor type S1 and 

S2) ............................................................................................................ 23

Copyrighted material licensed to BR Demo by Thomson Reuters (Scientific), Inc., subscriptions.techstreet.com, downloaded on Nov-27-2014 by James Madison. No further reproduction or distribution is permitted. Uncontrolled when printe

60252-1  IEC:2010+A1:2013  – 3 – 

5.16.6  Test procedure for simultaneous DC and AC test (capacitor type S3) ........ 24

5.16.47 Evaluation of the failure ............................................................................. 25

5.17  Resistance to heat, fire and tracking ..................................................................... 25

5.17.1  Ball-pressure test ...................................................................................... 25

5.17.2  Glow-wire test ........................................................................................... 25

5.17.3  Tracking test.............................................................................................. 26

6  Permissible overloads .................................................................................................... 26

6.1  Maximum permissible voltage ................................................................................ 26

6.2  Maximum permissible current ................................................................................ 26

6.3  Maximum permissible reactive output .................................................................... 26

7  Safety requirements ....................................................................................................... 26

7.1  Creepage distances and clearances ...................................................................... 26

7.2  Terminals and connecting cables .......................................................................... 27

7.3  Earth connections ................................................................................................. 27

7.4  Discharge devices ................................................................................................. 28

8  Marking .......................................................................................................................... 28

9  Guidance for installation and operation ........................................................................... 28

9.1  General ................................................................................................................. 28

9.2  Choice of rated voltage ......................................................................................... 29

9.2.1  Measurements of working voltage .............................................................. 29

9.2.2  Influence of capacitance ............................................................................ 29

9.3  Checking capacitor temperature ............................................................................ 29

9.3.1  Choice of maximum permissible capacitor operating temperature .............. 29

9.3.2  Choice of minimum permissible capacitor operating temperature ............... 29

9.4  Checking transients ............................................................................................... 29

9.5  Leakage current .................................................................................................... 30

Annex A (normative) Test voltage ........................................................................................ 31

Bibliography .......................................................................................................................... 32

Figure 1 – Destruction test .................................................................................................... 21

Figure 12– Test apparatus for d.c. conditioning ................................................................... 22

Figure 23– Test apparatus for a.c. destruction test .............................................................. 22

Figure 34– Arrangement to produce the variable inductor L in Figure 23 .............................. 22

Figure 5 – Test apparatus for simultaneous DC and AC ........................................................ 23

Table 1 – Type test schedule ................................................................................................ 13

Table 2a – Test voltages ....................................................................................................... 14

Table 2b – Test voltages ....................................................................................................... 14

Table 3 – Torque .................................................................................................................. 16

Table 4 – Endurance test conditions ..................................................................................... 19

Table 5 – Minimum creepage distances and clearances ..

...













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IEC 60252-1:2010 applies to motor capacitors intended for connection to windings of asynchronous motors supplied from a single-phase system having a frequency up to and including 100 Hz, and to capacitors to be connected to three-phase asynchronous motors so that these motors may be supplied from a single-phase system. This standard covers impregnated or unimpregnated capacitors having a dielectric of paper, plastic film, or a combination of both, either metallized or with metal-foil electrodes, with rated voltages up to and including 660 V. This edition includes the following significant technical changes with respect to the previous edition:

- the definition of "segmented capacitors" has been added in 3.6;

- the definition of "classes of operation" has been clarified, with the addition of the concept of "probable life" with reference to statistics, in 3.9;

- the following wording "Operation above the rated voltage will reduce the life expectancy of the capacitor" has been introduced in 6.1.

- some clarifications have been added to Clause 8, Marking, mainly for small capacitors.


CONTENTS:


1  Scope and object ..............................................................................................................6

2  Normative references .......................................................................................................6

3  Terms and definitions .......................................................................................................7

4  Service conditions .......................................................................................................... 10

4.1  Normal service conditions ..................................................................................... 10

4.2  Preferred tolerances on capacitance ..................................................................... 11

5  Quality requirements and tests ....................................................................................... 11

5.1  Test requirements ................................................................................................. 11

5.1.1  General ..................................................................................................... 11

5.1.2  Test conditions .......................................................................................... 11

5.2  Nature of tests ....................................................................................................... 11

5.2.1  Type tests ................................................................................................. 11

5.2.2  Routine tests ............................................................................................. 12

5.3  Type tests ............................................................................................................. 12

5.3.1  Test procedure .......................................................................................... 12

5.3.2  Extent of qualification ................................................................................ 12

5.4  Routine tests ......................................................................................................... 14

5.4.1  Test procedure .......................................................................................... 14

5.5  Tangent of loss angle ............................................................................................ 14

5.6  Visual examination ................................................................................................ 14

5.7  Voltage test between terminals .............................................................................. 14

5.8  Voltage test between terminals and case ............................................................... 15

5.9  Capacitance measurement .................................................................................... 15

5.10  Check of dimensions ............................................................................................. 15

5.11  Mechanical tests ................................................................................................... 15

5.11.1  Robustness of terminations ....................................................................... 16

5.11.2  Soldering ................................................................................................... 16

5.11.3  Vibration .................................................................................................... 17

5.11.4  Fixing bolt or stud (if fitted) ........................................................................ 17

5.12  Sealing test ........................................................................................................... 17

5.13  Endurance test ...................................................................................................... 18

5.13.1  Testing in air with forced circulation ........................................................... 18

5.13.2  Endurance test procedure ..........................................................................18

5.13.3  Conditions of compliance ........................................................................... 19

5.14  Damp-heat test ...................................................................................................... 19

5.15  Self-healing test .................................................................................................... 19

5.16  Destruction test ..................................................................................................... 20

5.16.1  General ..................................................................................................... 20

5.16.12 Test specimens ......................................................................................... 21

5.16.23 Test apparatus for sequential DC and AC test (capacitor type S1 and 

S2) ............................................................................................................ 21

5.16.34 Test procedure apparatus for simultaneous DC and AC test 

(capacitor type S3) .................................................................................... 23

5.16.5  Test procedure for sequential DC and AC test (capacitor type S1 and 

S2) ............................................................................................................ 23

Copyrighted material licensed to BR Demo by Thomson Reuters (Scientific), Inc., subscriptions.techstreet.com, downloaded on Nov-27-2014 by James Madison. No further reproduction or distribution is permitted. Uncontrolled when printe

60252-1  IEC:2010+A1:2013  – 3 – 

5.16.6  Test procedure for simultaneous DC and AC test (capacitor type S3) ........ 24

5.16.47 Evaluation of the failure ............................................................................. 25

5.17  Resistance to heat, fire and tracking ..................................................................... 25

5.17.1  Ball-pressure test ...................................................................................... 25

5.17.2  Glow-wire test ........................................................................................... 25

5.17.3  Tracking test.............................................................................................. 26

6  Permissible overloads .................................................................................................... 26

6.1  Maximum permissible voltage ................................................................................ 26

6.2  Maximum permissible current ................................................................................ 26

6.3  Maximum permissible reactive output .................................................................... 26

7  Safety requirements ....................................................................................................... 26

7.1  Creepage distances and clearances ...................................................................... 26

7.2  Terminals and connecting cables .......................................................................... 27

7.3  Earth connections ................................................................................................. 27

7.4  Discharge devices ................................................................................................. 28

8  Marking .......................................................................................................................... 28

9  Guidance for installation and operation ........................................................................... 28

9.1  General ................................................................................................................. 28

9.2  Choice of rated voltage ......................................................................................... 29

9.2.1  Measurements of working voltage .............................................................. 29

9.2.2  Influence of capacitance ............................................................................ 29

9.3  Checking capacitor temperature ............................................................................ 29

9.3.1  Choice of maximum permissible capacitor operating temperature .............. 29

9.3.2  Choice of minimum permissible capacitor operating temperature ............... 29

9.4  Checking transients ............................................................................................... 29

9.5  Leakage current .................................................................................................... 30

Annex A (normative) Test voltage ........................................................................................ 31

Bibliography .......................................................................................................................... 32

Figure 1 – Destruction test .................................................................................................... 21

Figure 12– Test apparatus for d.c. conditioning ................................................................... 22

Figure 23– Test apparatus for a.c. destruction test .............................................................. 22

Figure 34– Arrangement to produce the variable inductor L in Figure 23 .............................. 22

Figure 5 – Test apparatus for simultaneous DC and AC ........................................................ 23

Table 1 – Type test schedule ................................................................................................ 13

Table 2a – Test voltages ....................................................................................................... 14

Table 2b – Test voltages ....................................................................................................... 14

Table 3 – Torque .................................................................................................................. 16

Table 4 – Endurance test conditions ..................................................................................... 19

Table 5 – Minimum creepage distances and clearances ..

...













LINK DOWNLOAD (TÀI LIỆU VIP MEMBER)

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