IEEE-C37.20.7-2007.pdf
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1、IEEE Std C37.20.7-2007 (Revision of IEEE Std C37.20.7-2001) IEEE Guide for Testing Metal-Enclosed Switchgear Rated Up to 38 kV for Internal Arcing Faults IEEE 3 Park Avenue New York, NY 10016-5997, USA 18 January 2008 IEEE Power Engineering Society Sponsored by the Switchgear Committee C37.20.7 Copy
2、right The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 07/30/2008 03:23:24 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright The Institute of Electri
3、cal and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 07/30/2008 03:23:24 MDTNo reproduction or networking permitted without license from IHS -,-,- IEEE Std C37.20.7TM-2007 (Revision of IEEE Std C37.20.7-2001) IE
4、EE Guide for Testing Metal-Enclosed Switchgear Rated Up to 38 kV for Internal Arcing Faults Sponsor Switchgear Committee of the IEEE Power Engineering Society Approved 27 September 2007 IEEE-SA Standards Board Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS unde
5、r license with IEEELicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 07/30/2008 03:23:24 MDTNo reproduction or networking permitted without license from IHS -,-,- Abstract: A procedure for testing and evaluating the performance of metal-enclosed switchgear for internal arcing faults
6、 is covered. A method of identifying the capabilities of this equipment is given. Service conditions, installation, and application of equipment are also discussed. Keywords: accessibility, arc, bus, compartment, internal arcing fault, metal-clad switchgear, metal-enclosed interrupter switchgear, me
7、tal-enclosed low-voltage power circuit breaker switchgear, metal-enclosed switchgear, overpressure, protection The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA Copyright 2008 by the Institute of Electrical and Electronics Engineers, Inc. All rig
8、hts reserved. Published 18 January 2008. Printed in the United States of America. IEEE is a registered trademark in the U.S. Patent +1 978 750 8400. Permission to photocopy portions of any individual standard for educational classroom use can also be obtained through the Copyright Clearance Center.
9、Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 07/30/2008 03:23:24 MDTNo reproduction or networking permitted without license from IHS -,-,- iv Copyright 2008 IEEE. All ri
10、ghts reserved. Introduction This introduction is not part of IEEE Std C37.20.7-2007, IEEE Guide for Testing Metal-Enclosed Switchgear Rated Up to 38 kV for Internal Arcing Faults. The standards and guides in the IEEE C37TM series have been developed over a period of many years through the cooperativ
11、e efforts of users, specifiers, manufacturers, and other interested parties. This edition of IEEE Std C37.20.7 includes a detailed application guide and improvements in the testing procedure. The development of this guide rests heavily on Annex AA of IEC 298-1981a1and Amendment 1: 1994. This revisio
12、n is harmonized with the IEC and incorporates many of the refinements made to the original IEC 298, as contained in the current IEC 62271-200 edition. This revision reflects lessons learned from use of the previous 2001 version. This revision also extends the scope to include testing of low-voltage
13、metal-enclosed power circuit breaker switchgear. In the 1970s, principally in Europe, interest in evaluating electrical equipment under conditions of internal arcing emerged. As a result, a draft Annex AA to IEC 298 “A.C. Metal-Enclosed Switchgear and Controlgear for Rated Voltages Above 1kV and Up
14、to and Including 52kV” was issued by the IEC in 1981 and revised in 1990. It was redesignated IEC 62271-200 and revised in 2003. Subsequent to the creation of IEC 298, IEC subcommittee 17D issued Technical Report IEC/TR 1641 in 1996 (now redesignated as IEC/TR 61641) entitled “Enclosed Low-Voltage S
15、witchgear and Controlgear AssembliesGuide for Testing Under Conditions of Arcing Due to Internal Fault.” Knowledge of the arc resistance testing guide in IEC 298 spread to North America, and it was used as the basis for EEMAC G14-1, 1987, “Procedure for Testing the Resistance of Metal Clad Switchgea
16、r Under Conditions of Arcing Due to an Internal Fault.” EEMAC G14-1 incorporated improvements in knowledge and understanding in over a decade of use of Annex AA of IEC 298 in Europe. Failure within a switchgear assembly, whether from a defect, an unusual service condition, lack of maintenance, or mi
17、soperation, may initiate an internal arc. There is little likelihood of an internal arc in equipment meeting the requirements of IEEE Std C37.20.1TM-2002,b2,IEEE Std C37.20.2TM-1999, or IEEE Std C37.20.3TM-2001. There is even less likelihood of an internal arc in equipment that has insulated bus, co
18、mpartmentalization, barriers, and interlocks, such as those described in IEEE Std C37.20.2-1999; however, the possibility cannot be disregarded completely. The intent of this guide is to address the testing procedure for internal arcing faults in metal-enclosed switchgear. Even when arc-resistant co
19、nstruction is specified, it is strongly recommended that supplemental power system protection be provided. This supplemental protection should limit the total energy that can be delivered in the event of internal arcing faults. This protection can be provided in a variety of ways, depending on the n
20、ature of the system. Among the forms of protection that may be appropriate are current- limiting fuses, current-limiting circuit breakers, zone differential or bus differential relaying, ground differential protection, or arc-sensing systems sensitive to light or pressure effects that accompany inte
21、rnal arcing faults. The objective of such protection must be to cause the interruption of all sources of power to the arcing fault in a time interval that is shorter than the rated arcing duration capability demonstrated by the tests contained within this document (refer to 4.3). a IEC publications
22、are available from the Sales Department of the International Electrotechnical Commission, Case Postale 131, 3, rue de Varemb, CH-1211, Genve 20, Switzerland/Suisse (http:/www.iec.ch/). IEC publications are also available in the United States from the Sales Department, American National Standards Ins
23、titute, 11 West 42nd Street, 13th Floor, New York, NY 10036, USA. b IEEE publications are available from the Institute of Electrical and Electronics Engineers, 445 Hoes Lane, Piscataway, NJ 08854, USA (http:/standards/ieee.org/). Copyright The Institute of Electrical and Electronics Engineers, Inc.
24、Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 07/30/2008 03:23:24 MDTNo reproduction or networking permitted without license from IHS -,-,- v Copyright 2008 IEEE. All rights reserved. In addition to supplemental power system protection, ade
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