IEC 62246-2:2007

IEC 62246-2
Edition 1.0 2007-10
INTERNATIONAL
STANDARD
Reed contact units –
Part 2: Heavy-duty reed switches

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IEC 62246-2
Edition 1.0 2007-10
INTERNATIONAL
STANDARD
Reed contact units –
Part 2: Heavy-duty reed switches

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
V
ICS 29.120.70 ISBN 2-8318-9330-5

– 2 – 62246-2 © IEC:2007(E)
CONTENTS
FOREWORD.5

1 General .7
1.1 Scope.7
1.2 Normative references .7
1.3 Terms, definitions, abbreviations and symbols.7
1.4 Preferred values.8
1.4.1 Frequency of operation.8
1.4.2 Duty cycle .8
1.4.3 Open-circuit voltage across contacts .8
1.4.4 Current ratings .8
1.4.5 Load ratings .8
1.4.6 Number of operations .8
1.4.7 Climatic category.8
1.4.8 Preferred environmental severities .8
1.4.9 Rated operational voltage; U .8
e
1.4.10 Rated switching current; I .9
e
1.4.11 Rated insulation voltage .9
1.4.12 Rated impulse voltage .9
1.4.13 Utilization categories .9
1.4.14 Contact reliability.9
1.4.15 Limiting continuous current; I .9
th
1.5 Marking .10
1.6 Order of precedence .10
1.7 Precautions regarding mercury (for mercury wetted contact units) .10
2 Quality assessment procedures.10
2.1 General .10
2.2 Self-certification .10
2.3 Two-party certification .10
2.4 Third-party certification.10
3 Test and measurement procedures.11
3.1 General .11
3.2 Alternative procedures .11
3.3 Standard conditions for testing .11
3.4 Visual inspection and check of dimensions.11
3.5 Functional tests.11
3.6 Remanence test .11
3.7 Contact circuit resistance .11
3.8 Dielectric test .11
3.9 Insulation resistance .11
3.10 Operate, release, transfer or bridging, and bounce times.11
3.11 Contact sticking.12
3.12 Robustness of terminals .12
3.13 Soldering (solderability and resistance to soldering heat) .12
3.14 Climatic sequence .12
3.15 Damp heat, steady state.12

62246-2 © IEC:2007(E) – 3 –
3.16 Rapid change of temperature .12
3.17 Salt mist.12
3.18 Bump .12
3.19 Vibration.12
3.20 Shock.12
3.21 Acceleration test – Functional test only .12
3.22 Sealing.12
3.23 Electrical endurance.12
3.23.1 General .12
3.23.2 Types of electrical endurance test .13
3.23.3 Standard electrical endurance test.13
3.23.4 Application simulation endurance test.14
3.23.5 Requirements .14
3.23.6 Information to be stated in the detail specification .14
3.24 Mechanical endurance.15
3.25 Maximum cycling frequency.15
3.26 Mounting position test (for mercury wetted contact units) .15
3.27 Drain time test (for mercury wetted contact units).15
3.28 Voltage surge test .15
3.29 Rated impulse voltage .15
3.29.1 Procedure.15
3.29.2 Requirements .16
3.29.3 Information to be stated in the detail specification .16
3.30 Rated making and breaking capacities .16
3.30.1 General test arrangements .16
3.30.2 Procedure.16
3.30.3 Requirements .16
3.30.4 Information to be stated in the detail specification .16
3.31 Rated conditional short-circuit current .19
3.31.1 General test arrangements .19
3.31.2 Procedure.19
3.31.3 Requirements .19
3.31.4 Information to be stated in the detail specification .20
3.32 Contact reliability test.20
3.32.1 General test arrangements .20
3.32.2 Procedure.20
3.32.3 Requirements .21
3.32.4 Information to be stated in the detail specification .21
3.33 Temperature rise.22
3.33.1 Procedure.22
3.33.2 Requirements .22
3.33.3 Information to be stated in the detail specification .22
3.34 Making current capacity test.23
3.34.1 General .23
3.34.2 Procedure.23
3.34.3 Requirements .23
3.34.4 Information to be stated in the detail specification .23
3.35 Breaking current capacity test .24
3.35.1 General .24

– 4 – 62246-2 © IEC:2007(E)
3.35.2 Procedure.24
3.35.3 Requirements .24
3.35.4 Information to be stated in the detail specification .24

Annex A (informative) Electrical endurance test circuit.26
Annex B (informative) Rated conditional short-circuit current test circuit .28
Annex C (informative) Electrical ratings based on utilization categories .29
Annex D (informative) Example of test arrangement for contact reliability test .31
Annex E (informative) Standard test coils for heavy-duty reed switches .32
Annex F (informative) Making current capacity test sequence .33
Annex G (informative) Breaking current capacity test sequence.
...