1、 IEC 60076-21 Edition 1.0?2011-12 INTERNATIONAL STANDARD Power transformers Part 21:Standard requirements,terminology,and test code for step-voltage regulators IEC 60076-21:2011(E)IEEE Std.C57.15-2009 IEEE Std C57.15 Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downlo
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10、ch Tel.:+41 22 919 02 11 Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-28-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.IEC 60076-21 Edition 1.0?2011-12 INTERNATIONAL STANDARD Power transformers P
11、art 21:Standard requirements,terminology,and test code for step-voltage regulators INTERNATIONAL ELECTROTECHNICAL COMMISSION XD ICS 29.180 PRICE CODE ISBN 978-2-88912-848-8 IEEE Std C57.15 Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-28-2014 by James
12、 Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.i IEC 60076-21:2011(E)IEEE Std C57.15-2009 Published by the IEC under licence from IEEE.2009 IEEE.All rights reserved.Contents 1.Overview.1 1.1 Scope.1 1.2 Purpose.1 1.3 Word usage.1 2.Normative references.2 3.De
13、finitions.3 4.Service conditions.9 4.1 Usual service conditions.9 4.2 Loading at other than rated conditions.10 4.3 Unusual service conditions.10 4.4 Frequency.12 5.Rating data.12 5.1 Cooling classes of voltage regulators.12 5.2 Ratings.13 5.3 Supplementary continuous-current ratings.17 5.4 Taps.18
14、5.5 Operating voltage limits.18 5.6 Voltage supply ratios.20 5.7 Insulation levels.20 5.8 Losses.21 5.9 Short-circuit requirements.22 5.10 Tests.23 6.Construction.24 6.1 Bushings.24 6.2 Terminal markings.25 6.3 Diagram of connections.26 6.4 Nameplates.26 6.5 Tank construction.27 6.6 Components and a
15、ccessories.31 7.Other requirements.32 7.1 Other supplementary continuous-current ratings.32 7.2 Other components and accessories.32 8.Test code.33 8.1 Resistance measurements.34 8.2 Polarity test.36 8.3 Ratio tests.37 8.4 No-load losses and excitation current.40 8.5 Load losses and impedance voltage
16、.45 8.6 Dielectric tests.51 8.7 Temperature-rise tests.64 8.8 Short-circuit tests.73 8.9 Calculated data.77 9.Control systems.81 Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-28-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.IEC 60076-21:2011(E)ii IEEE Std C57.15-2009 Published by the IEC under licence from IEEE.2009 IEEE.All rights reserved.9.1 General.81 9.2 Control device construction.81
