Chapter 24. United States Power Transformer Equipment Standards and Processes

Chapter 24. United States Power Transformer Equipment Standards and Processes

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Unformatted text preview: 24 United States Power Transformer Equipment Standards and Processes Philip J. Hopkinson HVOLT, Inc. 24.1 Introduction..................................................................... 24-1 24.2 Major Standards Organizations ..................................... 24-1 24.3 Processes for Acceptance of American National Standards.......................................................................... 24-2 Canvass List . Accredited Standards Committee Deactivated December 31, 2002 by Actions of IEEE, NEMA, and C57 . Accredited Standards Organization in Use by IEEE Starting January 1, 2003 24.4 International Electrotechnical Commission..................................................................... 24-6 24.5 Relevant Power Transformer Standards Documents....................................................................... 24-6 Small Dr y-Ty pe Transformers . IEEE . Low-Voltage Medium-Power Dr y-Ty pe Transformers . Medium-Voltage and Large-Power Dr y-Ty pe Transformers . Liquid-Filled Transformers 24.1 Introduction The U.S. uses a voluntary process for the development of nationally recognized power transformer equipment standards. This chapter describes the U.S. standards accreditation process and provides flow charts to show how accredited standards are approved. With the International Electrotechnical Com- mittee (IEC) taking on increased importance, the interaction of the U.S. technical experts with IEC is also described. Finally, relevant power transformer documents are listed for the key power transformer equipment standards that guide the U.S. industry. 24.2 Major Standards Organizations ANSI American National Standards Institute ASC C57 Accredited Standards Committee C57 for Power and Distribution Transformers Deactivated December 31, 2002 by decisions of IEEE, NEMA, and C57 IEEE Institute of Electrical and Electronics Engineers NEMA National Electrical Manufacturers Association EL & P Electric Light and Power Delegation 2006 by Taylor & Francis Group, LLC. EEI Edison Electric Institute AEIC Association of Edison Illuminating Companies UL Under writers Laboratories IEC International Electrotechnical Commission 24.3 Processes for Acceptance of American National Standards T h e a cce p t a n ce o f a s t an d ar d a s a n A m e r i c a n n at i o n al st a n d a rd re q u i re s t h at i t b e p ro ces s e d t h ro u g h o n e o f t h re e m e t h o d s : by c a nv a s s l i st , a ccr e d i t e d st a n d a rd s co m m it t e e ( A S C ) , o r a ccr e d i t e d st a n d a rd s organization a ction. All t hree methods s hare the co m m o n re q u i re m e n t t h at t h e p ro ces s u s e d h a s b e e n accredite d by the A meric an Nat ional Standards Institute (ANSI), the methodolog y in corporates due p ro ces s , a n d co n s e n s u s am o n g i n t e re s ts i s a c h ie ved . I n h e re n t i n t h a t ap p rov al i s p re s e n t a ti o n o f a cce p t e d o p e r a t i o n a l p ro ce d u re s a n d = or a balloting gro up that is balanced among users, manufacturers,...
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This note was uploaded on 10/19/2010 for the course ENGINEERIN ELEC121 taught by Professor Tang during the Spring '10 term at University of Liverpool.

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Chapter 24. United States Power Transformer Equipment Standards and Processes

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