1、 IEC/TR 62271-305Edition 1.0 2009-11TECHNICAL REPORT High-voltage switchgear and controlgear Part 305:Capacitive current switching capability of air-insulated disconnectors for rated voltages above 52 kV IEC/TR 62271-305:2009(E)colourinside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2009 IEC,
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10、62271-305Edition 1.0 2009-11TECHNICAL REPORT High-voltage switchgear and controlgear Part 305:Capacitive current switching capability of air-insulated disconnectors for rated voltages above 52 kV INTERNATIONAL ELECTROTECHNICAL COMMISSION QICS 29.130.10 PRICE CODEISBN 978-2-88910-659-2 Registered tra
11、demark of the International Electrotechnical Commission colourinside 2 TR 62271-305 IEC:2009(E)CONTENTS FOREWORD.3 1 Scope.5 2 Normative references.5 3 Terms and definitions.5 4 Background and purpose.5 5 Switching tests.5 5.1 Arrangement of the disconnector for tests.5 5.2 Earthing of the test circ
12、uit and disconnector.6 5.3 Test frequency.6 5.4 Test voltage.6 5.5 Test current.6 5.6 Test circuit.6 5.7 Tests.7 5.7.1 Test duties and measurements.7 5.7.2 Behaviour of disconnector during tests.8 5.7.3 Condition of disconnector after tests.8 5.8 Test reports.8 Annex A(informative)Analysis.9 Annex B
13、(informative)Capacitive charging currents.14 Annex C(informative)Test circuits.15 Figure 1 Test circuit in principle for capacitive current switching.7 Figure A.1 Basic capacitive current switching circuit.9 Figure A.2 Test oscillograms for current of 2 A and CS/CL ratios of 2,5(Trace A)and 0,04(Tra
14、ce B).10 Figure A.3 Circuit for restriking current calculation.12 Figure C.1 Basic capacitive current switching circuit.15 Figure C.2 Alternative test circuit.16 Figure C.3 Restriking and integrated currents(in A and As,respectively)for the basic(dashed)traces)and alternative circuits(drawn traces).
15、Horizontal axis in ms.17 Table 1 Test tolerances.7 Table B.1 Capacitive charging currents at 245 kV and below.14 Table B.2 Capacitive charging currents at 300 kV to 550 kV.14 Table B.3 Capacitive charging currents at 800 kV to 1200 kV.14 TR 62271-305 IEC:2009(E)3 INTERNATIONAL ELECTROTECHNICAL COMMI
16、SSION _ HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 305:Capacitive current switching capability of air-insulated disconnectors for rated voltages above 52 kV FOREWORD 1)The International Electrotechnical Commission(IEC)is a worldwide organization for standardization comprising all national electrotechnical committees(IEC National Committees).The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields.To this end
