1、 IEC/TR 62271-306 Edition 1.0 2012-12 TECHNICAL REPORT High-voltage switchgear and controlgear Part 306:Guide to IEC 62271-100,IEC 62271-1 and other IEC standards related to alternating current circuit-breakers IEC/TR 62271-306:2012(E)colourinside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 20
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9、tchgear and controlgear Part 306:Guide to IEC 62271-100,IEC 62271-1 and other IEC standards related to alternating current circuit-breakers INTERNATIONAL ELECTROTECHNICAL COMMISSION XM ICS 29.130.10 PRICE CODE ISBN 978-2-83220-558-7 Registered trademark of the International Electrotechnical Commissi
10、on Warning!Make sure that you obtained this publication from an authorized distributor.colourinside 2 TR 62271-306 IEC:2012(E)CONTENTS FOREWORD.15 1 General.17 Scope.17 1.1 Normative references.17 1.22 Evolution of IEC standards for high-voltage circuit-breaker.18 3 Classification of circuit-breaker
11、s.22 General.22 3.1 Electrical endurance class E1 and E2.22 3.2 Capacitive current switching class C1 and C2.23 3.3 Mechanical endurance class M1 and M2.23 3.4 Class S1 and S2.24 3.5 General.24 3.5.1 Cable system.24 3.5.2 Line system.24 3.5.3 Conclusion.24 3.64 Insulation levels and dielectric tests
12、.25 General.25 4.1 Longitudinal voltage stresses.28 4.2 High-voltage tests.28 4.3 Impulse voltage withstand test procedures.29 4.4 General.29 4.4.1 Application to high-voltage switching devices.29 4.4.2 Additional criteria to pass the tests.30 4.4.3 Review and perspective.30 4.4.4 Theory.33 4.4.5 Su
13、mmary of 15/2 and 3/9 test methods.36 4.4.6 Routine tests.37 4.4.7 Correction factors.37 4.5 Altitude correction factor.37 4.5.1 Humidity correction factor.40 4.5.2 Background information about insulation levels and tests.41 4.6 Specification.41 4.6.1 Testing.43 4.6.2 Combined voltage tests of longi
14、tudinal insulation.43 4.6.3 Lightning impulse withstand considerations of vacuum interrupters.44 4.7 General.44 4.7.1 Conditioning during vacuum interrupter manufacturing.44 4.7.2 De-conditioning in service.45 4.7.3 Re-conditioning in service.45 4.7.4 Performing lightning impulse withstand voltage t
15、ests.45 4.7.55 Rated normal current and temperature rise.45 General.45 5.1 Load current carrying requirements.45 5.2 Rated normal current.45 5.2.1 Load current carrying capability under various conditions of ambient 5.2.2temperature and load.46 TR 62271-306 IEC:2012(E)3 Temperature rise testing.49 5
16、.3 Influence of power frequency on temperature rise and temperature 5.3.1rise tests.49 Test procedure.49 5.3.2 Temperature rise test on vacuum circuit-breakers.51 5.3.3 Resistance measurement.52 5.3.4 Additional information.52 5.4 Table with ratios Ia/Ir.52 5.4.1 Derivation of temperature rise equations.52 5.4.26 Transient recovery voltage.53 Harmonization of IEC and IEEE transient recovery voltages.53 6.1 General.53 6.1.1 A summary of the TRV changes.54 6.1.2 Revision of TRVs for rated voltages
