ANSI NEMA C84.1-2016 Electric Power Systems and Equipment - Voltage Ratings (60 Hertz).pdf

1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI C84.1-2016Electric Power Systems and Equipment Voltage Ratings (60 Hertz)ANSI C84.1-2016 Page i 2016 National Electrical Manufacturers Association ANSI C84.1-2016 American National Standard for Electric Power Systems and Equ

2、ipment Voltage Ratings (60 Hertz) Secretariat: National Electrical Manufacturers Association Approved: June 9, 2016 American National Standards Institute, Inc. ANSI C84.1-2016 Page ii 2016 National Electrical Manufacturers Association NOTICE AND DISCLAIMER The information in this publication was con

3、sidered technically sound by the consensus of persons engaged in the development and approval of the document at the time it was developed. Consensus does not necessarily mean that there is unanimous agreement among every person participating in the development of this document. American National St

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19、Published by National Electrical Manufacturers Association 1300 North 17thStreet, Suite 900, Rosslyn, Virginia 22209 2016 National Electrical Manufacturers Association. All rights, including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for

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21、America ANSI C84.1-2016 Page ii 2016 National Electrical Manufacturers Association ANSI C84.1-2016 Page iii 2016 National Electrical Manufacturers Association CONTENTS Foreword iv 1 Scope and Purpose 1 1.1 Scope . 1 1.2 Purpose 1 2 Definitions . 1 3 System Voltage Classes . 2 4 Selection of Nominal

22、System Voltages . 2 5 Explanation of Voltage Ranges 3 5.1 Application of Voltage Ranges . 3 5.1.1 Range AService Voltage 3 5.1.2 Range AUtilization Voltage . 3 5.1.3 Range BService and Utilization Voltages . 3 5.1.4 Outside Range BService and Utilization Voltages . 3 6 Voltage Ratings for 60-Hz Elec

23、tric Equipment . 4 6.1 General . 4 6.2 Recommendation . 4 Annex A Principal Transformer Connections to Supply the System Voltages of Table 1 7 Annex B Illustration of Voltage Ranges of Table 1 . 8 Annex C Polyphase Voltage Unbalance . 9 Annex D Applicable Standards . 11 TABLES Table 1 5 ANSI C84.1-2

24、016 Page iv 2016 National Electrical Manufacturers Association Foreword (This Foreword is not part of American National Standard C84.1) This standard supersedes ANSI C84.1-2011 American National Standard for Electric Power Systems and EquipmentVoltage Ratings (60Hz). With the 2016 revision, a 690/40

25、0V category has been added to the Low Voltage Class in table 1, and a paragraph discussing Conservation Voltage Reduction (CVR) has been added to Annex B. In 1942, the Edison Electric Institute published the document Utilization Voltage Standardization Recommendations, EEI Pub. No. J-8. Based on tha

26、t early document, a joint report was issued in 1949 by the Edison Electric Institute (EEI Pub. No. R6) and the National Electrical Manufacturers Association (NEMA Pub. No. 117). This 1949 publication was subsequently approved as American National Standard EEI-NEMA Preferred Voltage Ratings for AC Sy

27、stems and Equipment, ANSI C84.1-1954. American National Standard C84.1-1954 was a pioneering effort in its field. It not only made carefully considered recommendations on voltage ratings for electric systems and equipment, but also contained a considerable amount of much-needed educational material.

28、 After ANSI C84.1-1954 was prepared, the capacities of power supply systems and customers wiring systems increased and their unit voltage drops decreased. New utilization equipment was introduced and power requirements of individual equipment were increased. These developments exerted an important i

29、nfluence both on power systems and equipment design and on operating characteristics. In accordance with American National Standards Institute policy requiring periodic review of its standards, American National Standards Committee C84 was activated in 1962 to review and revise American National Sta

30、ndard C84.1-1954, the Edison Electric Institute and National Electrical Manufacturers Association (NEMA)being named cosponsors for the project. Membership on the C84 Committee represented a wide diversity of experience in the electrical industry. To this invaluable pool of experience were added the

31、findings of the following surveys conducted by the committee: a) A comprehensive questionnaire on power system design and operating practices, including measurement of actual service voltages (approximately 65,000 readings were recorded, coming from all parts of the United States and from systems of

32、 all sizes, whether measured by number of customers or by extent of service areas) b) A sampling of single-phase distribution transformer production by kilovolt-amperes and primary voltage ratings to determine relative uses of medium voltages c) A survey of utilization voltages at motor terminals at

33、 approximately 20 industrial locations The worth of any standard is measured by the degree of its acceptance and use. After careful consideration, and in view of the state of the art and the generally better understanding of the factors involved, the C84 Committee concluded that a successor standard

34、 to ANSI C84.1-1954 should be developed and published in a much simplified form, thereby promoting ease of understanding and hence its acceptance and use. This resulted in the approval and publication of American National Standard C84.1-1970, followed by its supplement, ANSI C84.1a-1973, which provi

35、ded voltage limits established for the 600V nominal system voltage. The 1977 revision of the standard incorporated an expanded Foreword that provided a more complete history of this standards development. The 1970 revision included a significantly more useful table 1 (by designating “preferred” syst

36、em voltages), the 1977 revision provided further clarity, and the 1982 revision segmented the system voltages into the various voltage classes. With the 2006 revision, the scope expanded to include voltages above 230 kV. This increased voltage range was previously covered by IEEE Std 1312-1993 (R200

37、4), IEEE Standard Preferred Voltage Ratings for Alternating-Current Electrical Systems and Equipment Operating at Voltages Above 230 kV Nominal, and its predecessor, ANSI C92.2-1987. In addition, standard nominal system voltages and voltage ranges were extended to include maximum system voltages of

38、up to and including 1200 kV. ANSI C84.1-2016 Page v 2016 National Electrical Manufacturers Association With the 2011 revision, table 1 was modified to reflect changes in lighting characteristics. Note 1 allowed lower utilization voltages for non-lighting circuits. Modern lighting equipment does not

39、need this special treatment. Note 1 was dropped and the table was updated with the lower voltages. This treats lighting equipment like all other utilization equipment. Suggestions for improvement of the standard are welcome. They should be sent to NEMA, 1300 North 17thStreet, Rosslyn, VA 22209. This

40、 standard was processed and approved for submittal to ANSI by Accredited Standards Committee on Preferred Voltage Ratings for AC Systems and Equipment, C84. Committee approval of the standard does not necessarily imply that all committee members voted for its approval. At the time it approved this s

41、tandard, the C84 Committee had the following members: Daniel Ward, Chairman Khaled Masri (NEMA), Secretary Organizations Represented Name of Representative Eversource Energy Lauren Gaunt Conrad Technical Services Larry Conrad Dominion Power John Bruce Dominion Power Daniel Ward Enphase Energy John B

42、erdner NRECA Robert Harris EPRI Tom Key FirstEnergy Technologies Tim Croushore GE Energy Management Lavelle Freeman GW Technical Services Gary Weidner NorthWestern Energy Jim Cole NRECA Tony Thomas Quanta Technology James Burke Baldor Electric Roger Daugherty Siemens Ted Olsen Smullin Engineering, I

43、nc. Gary Smullin SolarCity Michael McCarty T. David Mills Associates T. David Mills Walling Energy Systems Consulting Reigh Walling ANSI C84.1-2016 Page vi 2016 National Electrical Manufacturers Association ANSI C84.1-2016 Page 1 2016 National Electrical Manufacturers Association 1 Scope and Purpose

44、 1.1 Scope This standard establishes nominal voltage ratings and operating tolerances for 60Hz electric power systems above 100 volts. It also makes recommendations to other standardizing groups with respect to voltage ratings for equipment used on power systems and for utilization devices connected

45、 to such systems. This standard includes preferred voltage ratings up to and including 1200 kV maximum system voltage, as defined in the standard. In defining maximum system voltage, voltage transients and temporary overvoltages caused by abnormal system conditions such as faults, load rejection, an

46、d the like are excluded. However, voltage transients and temporary overvoltages may affect equipment operating performance and are considered in equipment application. 1.2 Purpose The purposes of this standard are to: a) Promote a better understanding of the voltages associated with power systems an

47、d utilization equipment to achieve overall practical and economical design and operation b) Establish uniform nomenclature in the field of voltages c) Promote standardization of nominal system voltages and ranges of voltage variations for operating systems d) Promote standardization of equipment vol

48、tage ratings and tolerances e) Promote coordination of relationships between system and equipment voltage ratings and tolerances f) Provide a guide for future development and design of equipment to achieve the best possible conformance with the needs of the users g) Provide a guide, with respect to

49、choice of voltages, for new power system undertakings and for changes in older ones 2 Definitions 2.1 system or power system: The connected system of power apparatus used to deliver electric power from the source to the utilization device. Portions of the system may be under different ownership, such as that of a supplier or a user. 2.2 system voltage terms: As used in this document, all voltages are rms phase-to-phase, except that the voltage following a slant-line is an rms phase-to-neutral voltage. 2.2.1 system voltage: The root-mean-square (rms) ph