IEEE-C37.20.4-2001.pdf

IEEE Std C37.20.4-2001 (Revision of IEEE Std C37.20.4-1996) IEEE Standard for Indoor AC Switches (1kV38kV) for Use in Metal-Enclosed Switchgear Sponsor Switchgear Committee of the IEEE Power Engineering Society Approved 17 March 2001 IEEE-SA Standards Board Abstract: Indoor ac medium-voltage switches for use in enclosures for application in power circuits at voltages above 1kV through 38kV are covered. These include stationary or drawout, manual or power operation, fused or unfused. Keywords: indoor ac switches, metal-enclosed switchgear The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA Copyright ? 2001 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Published 10 August 2001. Printed in the United States of America. Print: ISBN 0-7381-2838-4SH94927 PDF: ISBN 0-7381-2839-2SS94927 No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=O'Connor, Maurice Not for Resale, 04/28/2007 20:27:32 MDTNo reproduction or networking permitted without license from IHS -,-,- IEEE Standards documents are developed within the IEEE Societies and the Standards Coordinating Committees of the IEEE Standards Association (IEEE-SA) Standards Board. The IEEE develops its standards through a consensus development process, approved by the American National Standards Institute, which brings together volunteers representing varied viewpoints and interests to achieve the fi nal product. Volunteers are not necessarily members of the Institute and serve without compensation. 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Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=O'Connor, Maurice Not for Resale, 04/28/2007 20:27:32 MDTNo reproduction or networking permitted without license from IHS -,-,- Introduction (This introduction is not part of IEEE Std C37.20.4-2001, IEEE Standard for Indoor AC Switches (1kV38kV) for Use in Metal-Enclosed Switchgear.) This standard was fi rst issued as a Trial Use document. It is now being updated to include and reference the base document for Interrupter Switches IEEE Std 1247-1998.aThis document applies to switches used in metal-enclosed-switchgear as defi ned in the ANSI/IEEE C37.20 series. It does not apply to devices of similar construction used in other types of medium voltage (1kV through 38kV) equipment. This standard has been revised to refl ect needed technical changes that have been suggested since the original document was published. There have been three substantive changes in this revision, as follows: a)The asymmetrical factor for momentary rating has been changed from 1.6 to 1.55. b) The impulse test requirements have been defi ned as 3 by 9. This requires that nine additional tests be run in case of fl ash-over in the fi rst set of the required three instead of the old requirement of three additional tests. c)A new rating has been created, Rated Short-Time Withstand Current Duration. The above changes refl ect a move to harmonize with IEC and to accept current industry practices. This standard uses ANSI/IEEE Std 4-1978, IEEE Standard Techniques for High Voltage Testing, instead of IEEE Std 4-1995, the current revision of this document. This was done because of the omission of several correction factors and test procedures needed and used by the Switchgear Committee in standards for switchgear and circuit breakers. The Switchgear Committee has requested coordination and revision of the current standard IEEE Std 4-1995 to address these test procedures and correction factors. This edition was prepared by the Power Switchgear Assemblies Technical Committee of the National Electrical Manufacturers Association (NEMA) and the Switchgear Assemblies Subcommittee of the IEEE Switchgear Committee. NEMA is responsible for Clause 5 and Clause 7. The Switchgear Assemblies Subcommittee of the IEEE Switchgear Committee is responsible for Clause 3, Clause 4, Clause 6, and Clause 8. Through this joint eff ort over the many years, the switchgear assemblies standards have been of extreme value to the industry. Further suggestion for improvement gained in the use of this standard will be welcome. Copyright ? 2001 IEEE. All rights reserved.iii aInformation on references can be found in Clause 2. Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=O'Connor, Maurice Not for Resale, 04/28/2007 20:27:32 MDTNo reproduction or networking permitted without license from IHS -,-,- This standard is one of a series covering Switchgear Assemblies as follows (see Figure A). Other standards in the series are listed below. ivCopyright ? 2001 IEEE. All rights reserved. SWITCHGEAR ASSEMBLIES METAL-ENCLOSED POWER SWITCHGEAR METAL-ENCLOSED BUS C37.23 CONTROL SWITCHBOARDS C37.21 LOW-VOLTAGE POWER CIRCUIT BREAKER (LV) C37.20.1 METAL-CLAD (MC) C37.20.2 METAL-ENCLOSED INTERRUPTER (MEI) C37.20.3 NON-SEGREGATED PHASE SEGREGATED PHASE ISOLATED PHASE REQUIREMENTS AND GUIDE FOR CALCULATING LOSS VERTICAL ( OPEN OR ENCLOSED) DUAL DUPLEX CONTROL DESK BENCHBOARD DUAL BENCHBOARD DUPLEX BENCHBOARD FIXED RACK CABINET SWING RACK CABINET Figure ATypes of switchgear assemblies ANSI C37.22-1997American National Standard Preferred Ratings and Related Required Capabilities for Indoor AC Medium Voltage Switches Used in Metal-Enclosed Switchgear IEEEStdC37.20.1-1993(R1998)IEEEStandardforMetal-EnclosedLow-VoltagePowerCircuit Breaker Switchgear IEEE Std C37.20.2-1999IEEE Standard for Metal-Clad and Station-Type Cubicle Switchgear IEEE Std C37.20.3-2001IEEE Standard for Metal-Enclosed Interrupter Switchgear IEEE Std C37.20.4-2001IEEE Trial-Use Standard for Indoor AC Medium-Voltage Switches for Use in Metal-Enclosed Switchgear IEEE Std C37.20.6-1997IEEE Standard for 4.76kV to 38kV Rated Grounding and Testing Devices Used in Enclosures IEEE Std C37.21-1985IEEE Standard for Control Switchboards IEEE Std C37.23-1987 (R1991)IEEE Standard for Metal-Enclosed Bus and Guide for Calculating Losses in Isolated-Phase Bus Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=O'Connor, Maurice Not for Resale, 04/28/2007 20:27:32 MDTNo reproduction or networking permitted without license from IHS -,-,- Participants The Switchgear Assemblies Working Group that prepared and approved this standard had the following personnel: Eldridge R. Byron, Chair Charles J. BallAnn MorganRobert J. Puckett C. G. BurlandPaul J. NotarianGerald Sakats Julian J. DravisGeorge R. NourseStan H. Telander Bill McCowanTed W. OlsenMichael Wactor The Switchgear Assemblies Subcommittee of IEEE Switchgear Committee that approved this standard had the following personnel: Ted Burse, Chair Charles J. BallJerry M. JerabekGorden O. Perkins William BradleyWard E. LaubachEdward Peters Eldridge R. ByronDavid J. LemmermanRobert J. Puckett Julian J. DravisWilliam C. McKayGerald Sakats Douglas J. EdwardsPaul J. NotarianJim C. Scott Dave S. S. GohillGeorge R. NourseStan H. Telander Ram IyerTed W. OlsenMichael Wactor The following members of the balloting group voted on this standard. Balloters may have voted for approval, disapproval, or abstention. Roy W. AlexanderJerry M. JerabekJames C. Ransom Edwin AverillGinger KamberDavid N. Reynolds W. J. Bill BergmanJoseph L. KoepfingerHugh C. Ross Matthew BrownThomas W. LaRoseGerald Sakats R. A. BrownWard E. LaubachE. W. Schmunk Ted BurseJohn G. LeachDevki Sharma Eldridge R. ByronAlbert LivshitzR. Kirland Smith Carlos L. Cabrera-RuedaR. W. LongH. Melvin Smith Alexander DixonNigel P. McQuinGuy St. Jean Louis DoucetDaleep C. MohlaAlan D. Storms Paul R. DrumGeorge F. MontilletDavid Swindler Marcel FortinAnne F. MorganStan H. Telander Ruben D. GarzonF. J. MuenchThomas J. Tobin Douglas H. GiraudPaul J. NotarianMichael Wactor Mietek T. GlinkowskiGeorge R. NourseCharles L. Wagner Keith GrayT. W. OlsenRobert Yanniello Harold L. HessMiklos J. OroszLarry E. Yonce Rick JacksonNeville ParryRichard A. York Robert JeanjeanGordon O. PerkinsJanusz Zawadzki Copyright ? 2001 IEEE. All rights reserved.v Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=O'Connor, Maurice Not for Resale, 04/28/2007 20:27:32 MDTNo reproduction or networking permitted without license from IHS -,-,- The Accredited Standards Committee (ASC) C37 that reviewed and approved this standard had the following personnel at the time of approval: E. Bryon, Chair Andrew K. McCabe, Executive Vice-Chair of High-Voltage Switchgear Standards J. C. Scott, Executive Vice-Chair Low-Voltage Switchgear Standards D. L. Swindler, Executive Vice-Chair of IEC Activities Mervis Calwise, NEMA Co-Secretary Naeem Ahmad, IEEE Co-Secretary Organization RepresentedName of Representative Association of Iron and Steel Engineers . . . . . . . . . . . . . . . . . . . . . . . . . .(vacant) Electric Light and Power Group/Edison Electric Institute (EEI). . . . . . . . .D. E. Galicia J. L. Koepfi nger G. J. Martuscello Y. Musa E. M. Worland Institute of Electrical and Electronics Engineering (IEEE) . . . . . . . . . . . . .T. A. Burse K. Gray A. C. Monroe R. J. Puckett T. E. Royster R. D. Garzon J. Wood International Electricity Testing Association (NETA) . . . . . . . . . . . . . . . .A. Peterson National Electric Contractors Association . . . . . . . . . . . . . . . . . . . . . . . .D. Harwood National Electrical Manufacturers Association (NEMA) . . . . . . . . . . . . . .E. Bryon G. T. Jones R. W. Long T. Olsen G. Sakats D. L. Stone Tennessee Valley Authority. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D. N. Reynolds Testing Lab Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E. Rosen P. Notaria