ANSI NEMA CC 1-2009 Electric Power Connection for Substations.pdf

1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI/NEMA CC 1-2009 (R2015)Electric Power Connection for SubstationsApproved as an American National Standard ANSI Approval Date: May 19, 2009 ANSI/NEMA CC 1-2009 (R2015) Electric Power Connection for Substations Published by: Na

2、tional Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, Virginia 22209 www.nema.org 2009 National Electrical Manufacturers Association. All rights, including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for t

3、he Protection of Literary and Artistic Works, and the International and Pan American copyright conventions. 2009 National Electrical Manufacturers Association NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the develop

4、ment 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. The National Electrical Manufacturers Association (NEMA) standards and guideline publications, o

5、f which the document contained herein is one, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. While NEMA administers the process and

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10、ny person or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. Information and other standards on the topic c

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12、test, or inspect products, designs, or installations for safety or health purposes. Any certification or other statement of compliance with any health- or safety-related information in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the s

13、tatement. ANSI/NEMA CC 1-2009 (R2015) Page i 2009 National Electrical Manufacturers Association Foreword The purpose of this publication is to provide standard test methods and performance requirements for the electrical and mechanical characteristics of connectors under normal operating conditions.

14、 User needs in the development of this Standards Publication have been recognized through the normal marketing determination of customer acceptance done by individual NEMA members, and through the procedures inherent in its approval as an American National Standard. The Electrical Connector Section

15、of NEMA, in its constant review of the publication, continues to seek out the views of responsible users, which will contribute to the development of better standards. These standards are periodically reviewed by the Electrical Connector Section for any revisions necessary to keep them up to date wi

16、th advancing technology. Proposed or recommended revisions are welcome and should be submitted to: Vice President, Technical Services National Electrical Manufacturers Association 1300 North 17th Street Rosslyn, Virginia 22209 This Standards Publication was developed by the Technical Committee of th

17、e Electrical Connector Section of the National Electrical Manufacturers Association. At the time it was approved, the Electrical Connector Section had the following members: Michael Hughes, Chairman John Caskey, Secretary Organization Represented: Name of Representative: 3M Austin Center Carl Wentze

18、l AFL Wayne Quesnel Burndy LLC Chris Chadbourne Cooper Power Sys. By Eaton John Makal ERICO Andrew Henderson Galvan Industries, Inc. Roger Montambo Harger Ligntning =1.12 for 4-conductor bundles ln = natural logarithm. Figure 3-2 CONDUCTOR VOLTAGE GRADIENT FOR SINGLE CONDUCTOR Figure 3-3 CONDUCTOR V

19、OLTAGE GRADIENT FOR BUNDLED CONDUCTOR ANSI/NEMA CC 1-2009 (R2015) Page 9 2009 National Electrical Manufacturers Association Figure 3-4 LINE TO GROUND VOLTAGE FOR SINGLE CONDUCTOR (THREE PHASE) Figure 3-5 LINE TO GROUND VOLTAGE FOR BUNDLED CONDUCTOR (THREE PHASE) 3.3.3 Observations for Visual Corona

20、Observations for visual corona shall be made in a darkened area after the eye has adapted to the dark. Binoculars or image amplification equipment can be used to locate and observe the presence or absence of positive corona, neglecting any negative glow corona, as only the positive corona contribute

21、s significantly to the radio noise. A voltage up to 30% above the test voltage shall be applied to establish the critical corona location, if any. The corona extinction voltage shall be observed as the voltage is decreased. 3.3.4 RIV Measurements RIV measurements shall be made in accordance with eit

22、her: 3.3.4.1 ANNEX A, Methods of Measurement of Radio Influence Voltage (RIV) of High Voltage Apparatus or 3.3.4.2 IEC 61284 Overhead LinesRequirements and tests for fittings , Section 15 Corona and radio interference voltage (RIV) tests RIV measurements may be omitted if the test set-up allows comp

23、lete visual observation and all sources of corona have been identified. ANSI/NEMA CC 1-2009 (R2015) Page 10 2009 National Electrical Manufacturers Association 3.4 CANTILEVER STRENGTH OF BUS SUPPORTS The cantilever strength shall be determined by applying a load transverse to the conductor longitudin

24、al axis. The bus support shall be bolted to a flat surface, using the hardware recommended by the manufacturer. 3.5 TORQUE STRENGTH TEST OF BOLTED-TYPE CONNECTORS The conductor(s) shall be assembled in the connector and the bolts tightened uniformly and alternately in 11.3 N-m (100 lb-in.) increment

25、s until 50% over the nominal torque value is achieved (see 4.6). 3.6 TENSILE TEST OF WELDED COUPLERS The spliced conductor, with the coupler in between, shall be fastened in a tensile testing machine and a load shall be applied at a crosshead speed not exceeding 20.8 mm per minute per meter (1/4 in.

26、 per minute per foot) of sample length 3.7 BENDING TEST OF WELDED COUPLERS A load shall be applied at two points, at a distance of 76.2 mm (3 in.) from the weld and transverse to the conductor longitudinal axis. The conductor shall be freely supported at each end. ANSI/NEMA CC 1-2009 (R2015) Page 11

27、 2009 National Electrical Manufacturers Association Section 4 DESIGN REQUIREMENTS 4.1 CLAMPING FASTENERS FOR CONNECTORS 4.1.1 Clamping Fasteners for Copper Electric Power Connectors Clamping fasteners for copper electric power connectors shall meet the requirements of the American National Standard

28、for Square and Hex Bolts and Screws, ASME B18.2.1, and Square and Hex Nuts, ASME B18.2.2. Washers shall meet the requirements of the American National Standard for Plain Washers, ASME B18.22.1. Lock washers are optional and, if used, shall meet the requirements of the American National Standard for

29、Lock Washers, ASME B18.21.1. 4.1.2 Clamping Fasteners for Aluminum Electric Power Connectors 4.1.2.1 Clamping fasteners for aluminum electric power connectors shall meet the requirements of the American National Standard for Hex Bolts and Screws, ASME B18.21.1, and Square and Hex Nuts, ASME B18.2.2.

30、 Flat washers shall meet the requirements of the American National Standard, ASME B18.22.1. Lock washers shall meet the requirements of the American National Standard, ASME B18.21.1. 4.1.2.2 Bolts, nuts, or both, shall be lubricated to prevent galling. 4.2 THREAD DIMENSIONS FOR STUD TERMINAL CONNECT

31、ORS The thread dimensions for internal threaded stud terminal connectors intended for use with electrical equipment shall be as shown in Table 4-1. Table 4-1 STANDARD THREADS FOR STUD TERMINAL CONNECTORS Stud Diameter Number of Connector in. mm* Threads per in. Thread Class 5/8 15.9 11 UNC-2B 3/4 19

32、.0 16 UNF-2B 1 25.4 14 UNS-2B 1-1/8 28.6 12 UNF-2B 1-1/4 31.8 12 UNF-2B 1-1/2 38.1 12 UNF-2B 2 50.8 12 UN-2B 2-1/2 63.5 12 UN-2B 3 76.2 12 UN-2B * For reference only ANSI/NEMA CC 1-2009 (R2015) Page 12 2009 National Electrical Manufacturers Association 4.3 BOLT HOLES FOR TERMINAL CONNECTORS WITH SIN

33、GLE TANGS OR MULTIPLE FLAT BAR TANGS 4.3.1 The dimensions and the arrangement of bolt holes in the tangs of power connectors used in North America shall be as shown in Annex C, Figures C-1 to C-6. Figures C-7 to C-9 show the typical spacing for multiple flat bar tangs. 4.3.2 Metric terminal pad spac

34、ing and sizes used in some countries other than the U.S. are given for information in Annex D. 4.4 CONDUCTOR CLAMPING BOLTS FOR CONNECTORS 4.4.1 General Bronze alloy bolts shall be used on copper alloy connectors and aluminum alloy bolts shall be used on aluminum alloy conductors. Alternate alloy ma

35、terials, including Steel or Stainless steel, shall be permitted to be used for bolts if performance requirements are met and no adverse material compatibility or galling of threads occurs and if approved by the manufacturer. 4.4.2 Number and Diameter of Conductor Clamping Bolts The number and diamet

36、er of clamping bolts for connectors are listed in Tables 4-2 and 4-3, unless otherwise specified by the connector manufacturer. 4.4.2.1 U-Bolts (See Figure 4-1) Each U-bolt shall count as two bolts. Figure 4-1 U-BOLT TYPE CONNECTOR 4.4.2.2 Shackles (See Figure 4-2) Each bolt of a single casting, wra

37、p-around conductor shackle design shall count as two bolts. Figure 4-2 SHACKLE TYPE CONNECTOR ANSI/NEMA CC 1-2009 (R2015) Page 13 2009 National Electrical Manufacturers Association 4.4.2.3 Different Sizes of Conductors When two different sizes of conductors are involved, the bolts specified for the

38、smaller conductor shall be permitted to be used. 4.4.2.4 Exception when Three Bolts are Specified When three bolts are specified, the following exceptions shall apply: a. Terminal lugs shall have a minimum of four bolts or the equivalent for a single conductor. b. Stud connectors shall have a minimu

39、m of four bolts or the equivalent for the stud portion. ANSI/NEMA CC 1-2009 (R2015) Page 14 2009 National Electrical Manufacturers Association Table 4-2 CONNECTOR CLAMPING BOLTS U.S. STANDARD CONDUCTORS AND HARDWARE Type of Conductor For Copper Conductors For Aluminum or ACSR Conductors Bolts Per Co

40、nductor Bolts per Conductor Single Size Standard Duty Single Size Heavy Duty Range Taking Range Taking Single Size 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Standard Pipe Size, in. (OD mm) Copper Cable, AWG or kcmil (mm2) Aluminum or ACSR Cable O.D. In. (mm) Stud Dia. in. (mm) No. Dia. (in.) No. Dia. (in.) N

41、o. Dia. (in.) No. Dia. (in.) No. Dia. (in.) d (16.53) 4 thru 2/0 (21.2) thru 67.4) 0.200 thru 0.399 (5.08 thru 10.13) 1/2 (12.7) 2 3/8 3 3/8 4 3/8 2 1/2 2 1/2 2 (21.00) 3/0 thru 500 (85.0 thru 253) e thru 1c (15.88 thru 28.58) 3 3/8 3 1/2 4 3/8 4 1/2 4 1/2 : thru 1 26.25 thru 32.88) 550 thru 800 (27

42、9 thru 405) 3 3/8 4 1/2 4 1/2 4 1/2 4 1/2 13 thru 22 (41.50 thru 71.88) 900 thru 2000 (456 thru 1010) 0.400 thru 1.412 (10.16 thru 35.86) 13 thru 22 (31.75 thru 63.50) 3 1/2 4 1/2 4 1/2 4 1/2 4 1/2 3 thru 4 (87.50 thru 112.50) 2250 thru 3000 (1141 thru 1521) 1.413 thru 1.850 (35.89 thru 46.99) 2: th

43、ru 5 (69.85 thru 127.00) 3 5/8 4 5/8 4 5/8 4 5/8 4 5/8 42 thru 6 (127.03 thru 165.63) 1.81 (45,97) 6 5/8 NOTESee Appendix C for terminal pad configurations. ANSI/NEMA CC 1-2009 (R2015) Page 15 2009 National Electrical Manufacturers Association Table 4-3 CONNECTOR CLAMPING BOLTS ISO STANDARD CONDUCTO

44、RS AND HARDWARE Type of Conductor For Copper Conductors For Aluminum or ACSR Conductors Bolts Per Conductor Bolts per Conductor Single Size Standard Duty Single Size Heavy Duty Range Taking Range Taking Single Size 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Standard Pipe Size, mm Copper Cable, mm2 Aluminum or

45、 ACSR Cable Outside Diameter, mm Stud Dia. (mm) No. Dia. (mm) No. Dia. (mm) No. Dia. (mm) No. Dia. (mm) No. Dia. (mm) 16 thru 50 5.0 thru 10.1 12.0 2 M10 3 M10 4 M10 2 M12 2 M12 thru 240 30 3 M10 3 M12 4 M10 4 M12 4 M12 30 300 thru 400 3 M10 4 M12 4 M12 4 M12 4 M12 40 thru 60 600 thru 1000 10.2 thru

46、 35.9 40 thru 60 3 M12 4 M12 4 M12 4 M12 4 M12 90 thru 120 1100 thru 1500 40.0 thru 47.0 3 M16 4 M16 4 M16 4 M16 4 M16 140 thru 170 6 M16 NOTESee Annex C for terminal pad configurations. ANSI/NEMA CC 1-2009 (R2015) Page 16 2009 National Electrical Manufacturers Association Table 4-4 NOMINAL TORQUE V

47、ALUES NOTES LA = Lubricated-Aluminum SB = Silicon bronze or steel See 4.5 for arrangement and sizes of bolts for terminal connectors. # For reference only. 4.4.3 Examples Illustrating the Use of Table 4-2 4.4.3.1 Example 1 A straight coupler connector or a 90-degree (1.57 radian) elbow connector is

48、used to connect a conductor of 1 in. copper pipe to another conductor of 1 in. copper pipe. After locating the proper line for the 1 in. copper pipe in the first column of the table, the total number of bolts required can be determined from the following information given for the connectors. For sta

49、ndard duty connectors: A X B = C 3 x 2 = 6 For standard duty terminal or stud connectors: A X B = C 4 x 2= 8 Where: A = in. diameter bolts per conductor B = Number of conductors C = Number of in. diameter bolts per fitting Table 4-5 EXAMPLE 1 Bolts per Conductor Number of Conductors Minimum Number of Bolts per Fitting Comments 3 2 6 Minimum 4 2 8 see 4.4.2.4 Bolt Size is 1/2 in. Diameter of Bolts Torque in. mm# Material N-m lb-ft lbf-in. 1/4 (6.3) SB 9 7 80 5/16 (7.9) SB 20 15 180 3/8