1、 IEEE Standard Requirements for Subsurface, Vault, and Padmounted Load-Interrupter Switchgear and Fused Load-Interrupter Switchgear for Alternating Current Systems up to 38 kV Sponsored by the Switchgear Committee IEEE 3 Park Avenue New York, NY 10016-5997 USA IEEE Power and Energy Society IEEE Std
2、C37.74-2014 (Revision of IEEE Std C37.74-2003) IEEE Std C37.74-2014 (Revision of IEEE Std C37.74-2003) IEEE Standard Requirements for Subsurface, Vault, and Padmounted Load-Interrupter Switchgear and Fused Load-Interrupter Switchgear for Alternating Current Systems up to 38 kV Sponsor Switchgear Com
3、mittee of the IEEE Power and Energy Society Approved 10 December 2014 IEEE-SA Standards Board ii Copyright 2015 IEEE. All rights reserved. Abstract: Required definitions, ratings, procedures for performing design tests and production tests, and construction requirements for subsurface, vault, and pa
4、dmounted load-interrupter switchgear and fused load-interrupter switchgear for ac systems up to 38 kV are covered in this standard. Keywords: design tests, fused, IEEE C37.74, load-interrupter, padmount, padmounted, production tests, ratings, service conditions subsurface, switchgear, vault, way Ele
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34、s, and the risk of infringement of such rights, is entirely their own responsibility. Further information may be obtained from the IEEE Standards Association. vi Copyright 2015 IEEE. All rights reserved. Participants The Working Group on PC37.74 of the Recloser and Sectionalizers Subcommittee of the
35、 IEEE Switchgear Committee, which prepared this standard, had the following members at the time of approval: Steven Meiners, Chairman Chris Ambrose Jeffery Gieger Francois Soulard Chuck Ball George House Tom Stefanski Jerry Baskin Edward Jankowich David Stone Craig Befus Donald Martin James Swank Fe
36、rnando Calderon Frank Muench Tim Taylor Raymond Capra Larry Putman Nenad Uzelac Larry Davis Scott Reed Walt Von Miller Frank DeCesaro Timothy Royster William Walter The following members of the individual balloting committee voted on this standard. Balloters may have voted for approval, disapproval,
37、 or abstention. William Ackerman Satish Aggarwal Chris Ambrose Adam Bagby Chuck Ball Thomas Barnes Paul Barnhart George Becker Craig Befus Steven Bezner Harvey Bowles Ted Burse Eldridge Byron Suresh Channarasappa Frank Decesaro Gary Donner Randall Dotson Dana Dufield Edgar Dullni Donald Dunn Gary En
38、gmann Marcel Fortin Fredric Friend David Gilmer Mietek Glinkowski Robert Goodin Edwin Goodwin James Graham Randall Groves Jerry Harness Gary Heuston Edward Jankowich Andrew Jones John Kay Gael Kennedy Yuri Khersonsky Boris Kogan Jim Kulchisky Saumen Kundu Chung-Yiu Lam John Leach Albert Livshitz Gre
39、g Luri Donald Martin Frank Mayle Peter Meyer Georges Montillet Frank Muench Jerry Murphy Arthur Neubauer Michael Newman T. Olsen Miklos Orosz Lorraine Padden Donald Parker R. Parry Christopher Petrola Larry Putman Scott Reed Michael Roberts Charles Rogers Tim Rohrer Joseph Rostron Timothy Royster Ba
40、rtien Sayogo Gil Shultz James Smith Jerry Smith R. Kirkland Smith Francois Soulard Mark Stavnes Gary Stoedter David Stone James Swank Michael Swearingen David Tepen Joe Uchiyama John Vergis William Walter Janusz Zawadzki Matthew Zeedyk vii Copyright 2015 IEEE. All rights reserved. When the IEEE-SA S
41、tandards Board approved this standard on 10 December 2014, it had the following membership: John Kulick, Chair Jon Walter Rosdahl, Vice Chair Richard H. Hulett, Past Chair Konstantinos Karachalios, Secretary Peter Balma Farooq Bari Ted Burse Clint Chaplin Stephen Dukes Jean-Philippe Faure Gary Hoffm
42、an Michael Janezic Jeffrey Katz Joseph L. Koepfinger* David J. Law Hung Ling Oleg Logvinov T. W. Olsen Glenn Parsons Ron Petersen Adrian Stephens Peter Sutherland Yatin Trivedi Phil Winston Don Wright Yu Yuan *Member Emeritus Also included are the following nonvoting IEEE-SA Standards Board liaisons
43、: Richard DeBlasio, DOE Representative Michael Janezic, NIST Representative Catherine Berger IEEE-SA Content Publishing Erin Spiewak IEEE-SA Technical Community Programs viii Copyright 2015 IEEE. All rights reserved. Introduction This introduction is for IEEE Std C37.74-2014, IEEE Standard for Subsu
44、rface, Vault, and Padmounted Load-Interrupter Switchgear and Fused Load-Interrupter Switchgear for Alternating Current Systems up to 38 kV. This standard assigns an overall rating to the switchgear for the common ratings of dielectric withstand, peak withstand current, short-time withstand current,
45、and fault-making current. The ratings for the switchgear are based on the minimum ratings of the components or ways. In addition, each way is assigned specific ratings reflecting its continuous current, and its specific load or fault interrupting current depending upon the components used in that wa
46、y. This standard also recognizes designs for equipment specifically intended for grounded-wye system applications, utilizing phase-to-ground rated devices for specific applications. ix Copyright 2015 IEEE. All rights reserved. Contents 1. Scope . 12. Normative references 13. Definitions 33.1 Standar
47、d terms . 3 3.2 Special terms 3 4. Normal (usual) and special (unusual) service conditions 44.1 Normal (usual) service conditions . 4 4.1.1 Indoor DSG 4 4.1.2 Outdoor DSG . 5 4.2 Special (unusual) service conditions 5 4.2.1 Altitude 5 4.2.2 Exposure to excessive pollution . 5 4.2.3 Temperature and h
48、umidity . 5 4.2.4 Exposure to abnormal vibration, shock, or tilting 5 4.2.5 Other special (unusual) service conditions . 5 4.2.6 Other parameters 6 5. Ratings, required related capabilities, and test requirements 65.1 General 6 5.2 Rating information . 6 5.2.1 Overall ratings 6 5.2.2 Individual way
49、ratings 7 5.3 Continuous current ratings and related test requirements .10 5.3.1 Conditions of continuous current rating 10 5.3.2 Limits of observable temperature rise .10 5.3.3 Application of fuse 10 6. Design (type) tests146.1 General .15 6.1.1 Condition of DSG to be tested 15 6.1.2 Mounting of the DSG 15 6.1.3 Maintenance 15 6.1.4 Power-frequency .15 6.2 Tests on connectors and bushings used on DSG 16 6.3 Testing of DSG as an entity 16 6.3.1 General 16 6.3.2 Test requirements 16 6.3.3 Condition of DSG following short-circuit tests 17 6.4 Testing of switches installed
