1、 IEC 62246-2Edition 1.0 2007-10INTERNATIONAL STANDARD Reed contact units Part 2:Heavy-duty reed switches IEC 62246-2:2007(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 IEC,Gene
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9、AL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.IEC 62246-2Edition 1.0 2007-10INTERNATIONAL STANDARD Reed contact units Part 2:Heavy-duty reed switches INTERNATIONAL ELECTROTECHNICAL COMMISSION VICS 29.120.70 PRICE CODEISBN 2-8318-9330-5LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTE
10、RNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.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 volt
11、age 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;Ue.8 1.4.10 Rated switching current;Ie.9 1.4.11 Rated insulation voltage.9 1.4.12 Rated impulse voltage
12、.9 1.4.13 Utilization categories.9 1.4.14 Contact reliability.9 1.4.15 Limiting continuous current;Ith.9 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 Tw
13、o-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 resist
14、ance.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.1
15、2 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.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.
16、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
