1、g44g40g40g40g3g54g87g71g3g38g22g26g17g23g21g140g16g21g19g19g28g3g11g53g72g89g76g86g76g82g81g3g82g73g44g40g40g40g3g54g87g71g3g38g22g26g17g23g21g16g20g28g28g25g12g44g40g40g40g3g54g87g68g81g71g68g85g71g3g54g83g72g70g76g191g70g68g87g76g82g81g86g3g73g82g85g43g76g74g75g16g57g82g79g87g68g74g72g3g11g33g3g20
2、g19g19g19g3g57g12g3g40g91g83g88g79g86g76g82g81g16g55g92g83g72g3g39g76g86g87g85g76g69g88g87g76g82g81g16g38g79g68g86g86g3g41g88g86g72g86g15g41g88g86g72g3g68g81g71g3g39g76g86g70g82g81g81g72g70g87g76g81g74g3g38g88g87g82g88g87g86g15g41g88g86g72g3g39g76g86g70g82g81g81g72g70g87g76g81g74g3g54g90g76g87g70g75
3、g72g86g15g3g68g81g71g41g88g86g72g3g47g76g81g78g86g15g3g68g81g71g3g36g70g70g72g86g86g82g85g76g72g86g3g56g86g72g71g90g76g87g75g3g55g75g72g86g72g3g39g72g89g76g70g72g86g3g44g40g40g40g3g51g82g90g72g85g3g9g3g40g81g72g85g74g92g3g54g82g70g76g72g87g92g3g54g83g82g81g86g82g85g72g71g3g69g92g3g87g75g72g54g90g76g
4、87g70g75g74g72g68g85g3g38g82g80g80g76g87g87g72g72g44g40g40g40g22g3g51g68g85g78g3g36g89g72g81g88g72g3g49g72g90g3g60g82g85g78g15g3g49g60g3g20g19g19g20g25g16g24g28g28g26g15g3g56g54g36g3g3g21g28g3g45g68g81g88g68g85g92g3g21g19g20g19g38g22g26g17g23g21g55g48IEEE Std C37.42TM-2009 (Revision of ANSI C37.42-1
5、996) IEEE Standard Specifications for High-Voltage ( 1000 V) Expulsion-Type Distribution-Class Fuses, Fuse and Disconnecting Cutouts, Fuse Disconnecting Switches, and Fuse Links, and Accessories Used with These Devices Sponsor Switchgear Committee of the IEEE Power also open-link types of fuses, cut
6、outs and their associated fuse links, open and enclosed types of disconnecting cutouts, fuse supports, fuse mountings and fuse hooks of the type used exclusively with distribution-class fuses, fuse cutouts, fuse disconnecting switches and disconnecting cutouts, fuseholders and removable switch blade
7、s of the type used exclusively with distribution-class fuse supports and mounting brackets used for distribution-class equipment and other accessories. Keywords: distribution-class fuses, distribution fuse cutouts, expulsion fuses, fuse, fuse applications, fuse disconnecting switches, fuse links, hi
8、gh-voltage fuses The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA Copyright 2010 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Published 29 January 2010. Printed in the United States of America. IEEE is a re
9、gistered 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. Introduction This introduction is not part of IEEE Std C37.42-2009, IEEE Standard Specificatio
10、ns for High-Voltage ( 1000 V) Expulsion-Type Distribution-Class Fuses, Fuse and Disconnecting Cutouts, Fuse Disconnecting Switches, and Fuse Links, and Accessories Used with These Devices. This standard is a revision of ANSI C37.42-1996, to bring it up to date and in line with present day requiremen
11、ts for high-voltage fuses, fuse links and fuse disconnecting switches. This standard was previously developed by the NEMA High Voltage Fuse Technical Committee. As of 2003 the responsibility for this standard has been transferred to the IEEE High-Voltage Fuse Subcommittee. Liaison was maintained wit
12、h the International Electrotechnical Commission (IEC) during the development of the revisions in order to incorporate the latest thinking up to the time of publication. The Switchgear Committee of the IEEE Power HD,heavy duty;EHD,extra heavyduty.eThese tests are onlyrequired on fusedisconnecting swi
13、tches ifthey can beused with a solid switch link. See3.1.1.d). fThe X/R formomentary testing of these devices shall beX/R = 5.IEEE Std C37.42-2009 6 Copyright 2010 IEEE. All rightsreserved. IEEE Standard Specifications for High-Voltage ( 1000 V) Expulsion-Type Distribution-Class Fuses, Fuse and Disc
14、onnecting Cutouts, Fuse Disconnecting Switches, and Fuse Links, and Accessories Used with These Devices Table 2Preferred maximum voltage, continuous current, interrupting current, short-time current, and lightning impulse withstand voltage basic impulse level (BIL) ratings for opentypes of fuse cuto
15、uts, fuse disconnecting switches, and disconnecting cutoutsFuses,fusecutouts,fusedisconnecting switches,and disconnecting cutouts Fuses,fusecutouts,and fusedisconnecting switchesDisconnecting cutouts Rated maximum voltagea(kV, rms) Conductorsizesto be accommodated byterminals, min.max. diameter bRat
16、ed short-time withstandcurrentdSingle-voltagerated Slant-voltage rated Rate d lightning impulse voltage (kV) X/R ratio MillimetersInchesContinuo us cu rren t (A) Rated interrupting current (kA, rms sym) I n terru p t in g ra tin g nome nc latur ecContinuo us cu rren t (a mp s ) Mom. (kA peak) 15-Cyc
17、le (kA rms)3-s (kA rms)Col 1 Col 1a Col 2 Col 2a Col 3 Col 4 Col 5 Col 6 Col 7 Col 8 Col 9 Col 10 Col 11 Col 12 Col 13 8.3 7.8 75 8 4.1111.35 0.1620.447 100 3.55 HD 200 16.7 7.1 1.6 8.3 7.8 75 8 4.1111.35 0.1620.447 100 7.1 EHD 200 16.7 7.1 1.6 8.3 7.8 75 12 4.1111.35 0.1620.447 100 13.2 UHD 200 32.
18、8 13.2 1.6 8.3 7.8 75 8 6.5314.61 0.2570.575 200 2.8 ND 300 20.3 8.6 3.2 8.3 7.8 75 8 6.5314.61 0.2570.575 200 8.6 HD 300 20.3 8.6 3.2 8.3 7.8 75 12 6.5314.61 0.2570.575 200 13.2 EHD 300 32.8 13.2 3.2 8.3 7.8 75 12 6.5314.61 0.2570.575 200 15.0 UHD 300 37.3 15.0 3.2 15.5 15.0 8.3/15.5 7.8/15.0 95 8
19、4.1111.35 0.1620.447 100 2.8 HD 200 16.7 7.1 1.6 15.5 15.0 8.3/15.5 7.8/15.0 95 8 4.1111.35 0.1620.447 100 5.6 EHD 200 16.7 7.1 1.6 15.5 15.0 8.3/15.5 7.8/15.0 95 12 4.1111.35 0.1620.447 100 10.6 UHD 200 26.4 10.6 1.6 15.5 15.0 8.3/15.5 7.8/15.0 95 8 6.5314.61 0.2570.575 200 2.8 ND 300 20.3 8.6 3.2
20、15.5 15.0 8.3/15.5 7.8/15.0 95 8 6.5314.61 0.2570.575 200 7.1 HD 300 20.3 8.6 3.2 15.5 15.0 8.3/15.5 7.8/15.0 95 12 6.5314.61 0.2570.575 200 10.6 EHD 300 32.8 13.2 3.2 15.5 15.0 8.3/15.5 7.8/15.0 95 12 6.5314.61 0.2570.575 200 13.2 UHD 300 32.8 13.2 3.2 27.0 27.0 15.5/27.0 15.0/27.0 125 8 4.1111.35
21、0.1620.447 100 2.5 HD 200 9.46 4.0 1.6 27.0 27.0 15.5/27.0 15.0/27.0 125 12 4.1111.35 0.1620.447 100 4.0 EHD 200 9.97 4.0 1.6 27.0 27.0 15.5/27.0 15.0/27.0 125 12 4.1111.35 0.1620.447 100 8.0 UHD 200 19.9 8.6 1.6 27.0 27.0 15.5/27.0 15.0/27.0 125 12 6.5314.61 0.2570.575 200 7.1 UHD 300 19.9 8.6 3.2
22、38.0 38.0 27.0/38.0 27.0/38.0 150 15 4.1111.35 0.1620.447 100 1.3 ND 200 12.74 5.0 1.6 38.0 38.0 27.0/38.0 27.0/38.0 150 15 4.1111.35 0.1620.447 100 5.0 HD 200 12.74 5.0 1.6 aThe preferred ratings are in columns1 and 2.Columns 1a and 2a werethe preferred ratings priorto the 1996 revision ofthis stan
23、dard. See3.2.1. bTerminal sizesare construction requirements and are not ratings.cInterrupting rating nomenclature: ND,normal duty;HD,heavy duty;EHD,extra heavyduty; UHD,ultra heavy duty. dThese tests are onlyrequired on fuse disconnecting switches if theycan beused with a solid switch link. See3.1.
24、1 d). IEEE Std C37.42-2009 IEEE Standard Specifications for High-Voltage ( 1000 V) Expulsion-Type Distribution-Class Fuses, Fuse and Disconnecting Cutouts, Fuse Disconnecting Switches, and Fuse Links, and Accessories Used with These Devices Table 3 Preferred rated maximum voltage, rated continuous c
25、urrent, rated interrupting current, X/R ratio, rated lightning impulse withstand voltage basic impulse level (BIL), and construction requirements for open-link type fuse cutouts Dimensional range of conductor sizes to be accommodated by terminals, minimummaximum diameterbRated maximum voltagea(kV, r
26、ms) Rated lightning impulse voltage (kV) X/R ratio Millimeters Inches Rated continuous current (A) Rated interrupting current (kA, rms sym) Col 1 Col 1a Col 2 Col 3 Col 4 Col 5 Col 6 Col 7 8.3 7.8 75 1.3 3.256.38 0.1280.251 50 1.2 15.5 15.0 95 1.3 3.256.38 0.1280.251 50 1.2 23.0 18.0 125 1.3 3.256.3
27、8 0.1280.251 50 0.75 aThe preferred ratings are in column 1. Column 1a were the preferred ratings prior to the 1996 revision of this standard. See 3.2.1. bTerminal sizes are construction requirements and are not ratings. The X/R values listed in Table 1, Table 2, and Table 3 are the values used for
28、the high current interrupting tests. See the tables in Clause 6 of IEEE Std C37.41 for the X/R values used for the tests performed at lower currents. The identifying color (color coding) specified in 3.5.1 and the terminal sizes specified in 3.5.6 listed in Table 1, Table 2, and Table 3 are construc
29、tion requirements and are not ratings. 3.2.2 Rated power frequency The preferred rated frequencies for devices covered by this standard are 50 Hz, 60 Hz, and 50/60 Hz. 3.2.3 Rated load-break current for distribution-class load-break fuses, open fuse cutouts, fuse disconnecting switches and open disc
30、onnecting cutouts Rated load-break current for open type disconnecting cutouts equipped with load break means: The rated load-break current for open disconnecting cutouts equipped with a load break means shall be a minimum of the rated continuous current as specified in column 10 of Table 2. Rated l
31、oad-break current for open type fuses, open type fuse cutouts, and fuse disconnecting switches equipped with a load break means: The rated load-break current for these devices shall be a minimum of the rated continuous current as specified in column 7 of Table 2. The rated load-break currents for op
32、en fuses, open fuse cutouts, and open fuse disconnecting switches may need to be higher than those listed in column 7 of Table 2 since some fuses are used at higher currents than their assigned continuous current rating during periods of overloading. In this case, the load-break rating shall be the
33、maximum current the specific fuse or fuse cutout can carry without melting the fusible element of the maximum fuse link that can be used in the device. 7 Copyright 2010 IEEE. All rights reserved. IEEE Std C37.42-2009 IEEE Standard Specifications for High-Voltage ( 1000 V) Expulsion-Type Distribution
34、-Class Fuses, Fuse and Disconnecting Cutouts, Fuse Disconnecting Switches, and Fuse Links, and Accessories Used with These Devices 3.2.4 Rated Maximum Application Temperature Rated Maximum Reference Ambient Temperature The rated maximum application temperature (rated maximum reference ambient temper
35、ature) for devices covered by this standard is the maximum ambient temperature at which the device is suitable for use. The device must be capable of withstanding this temperature without any deterioration that would inhibit its ability to properly interrupt the circuit. The minimum rating allowable
36、 is 40 C. The rated maximum application temperature of the device in degrees C shall be preferably selected from the R20 series of preferred numbers (typically 40, 45, 50, 56, 63, 71, etc.). The R20 series comprises the numbers 1, 1.12, 1.25, 1.40, 1.60, 1.80, 2.00, 2.24, 2.50, 2.80, 3.15, 3.55, 4.0
37、0, 4.50, 5.00, 5.60, 6.3, 7.10, 8.00, 9.00, and their multiples of 10. 3.2.5 Performance requirements The preferred performance requirements of open and enclosed distribution-class fuses and fuse cutouts, open and enclosed disconnecting cutouts, open and enclosed fuse disconnecting switches, and ope
38、n-link type fuses and cutouts shall include: a) Power-frequency dry-withstand voltages as specified in 3.3.1 b) Lightning impulse withstand voltages as specified in 3.3.1 c) Power-frequency wet-withstand voltages as specified in 3.3.1 d) Temperature-rise limitations as specified in 3.3.6 e) Radio-in
39、fluence levels as specified in 3.3.4 3.2.6 Ratings and performance requirements other than preferred The ratings and performance requirements specified in 3.2.5 represent the preferred values and requirements. Special circuit or environmental conditions may require devices with ratings or performanc
40、e requirements that are different from the preferred values and requirements specified above. For these devices the ratings and the performance requirements shall be agreed upon by the user and the manufacturer and additional testing may be required to validate that the device is suitable for the in
41、tended application. 3.3 Design test requirements 3.3.1 Dielectric tests All devices covered by this standard shall be capable of withstanding the test voltages specified in Table 4 when tested as specified in Clause 5 of IEEE Std C37.41-2008. The number of tests required is as follows: a) For all ty
42、pes of fuses, fuse cutouts, and fuse disconnecting switches the tests shall be made on three devices equipped with any size fuse link or refill unit b) For all disconnecting cutouts or other devices equipped with a switch blade or switch link the tests shall be made on three devices with the disconn
43、ecting blade or switch link recommended for the device 8 Copyright 2010 IEEE. All rights reserved. IEEE Std C37.42-2009 IEEE Standard Specifications for High-Voltage ( 1000 V) Expulsion-Type Distribution-Class Fuses, Fuse and Disconnecting Cutouts, Fuse Disconnecting Switches, and Fuse Links, and Ac
44、cessories Used with These Devices Table 4 Preferred minimum dielectric withstand test voltages Withstand voltages Rated maximum voltage (kV, rms)aTerminal-to-ground Terminal-to-terminal Single-voltage rated Slant-voltage rated Power-frequency dry test, 1 min (kV, rms)Power-frequency wet test, 10 s (
45、kV,rms) Lightning impulse test, 1.2 50s (kV, peak) Power-frequency dry test, 1 min (kV, rms)Lightning impulse test, 1.2 50s (kV, peak) Col 1 Col 1a Col 2 Col 2a Col 3 Col 4 Col 5 Col 6 Col 7 5.5 5.2 21 20 60 21 60 8.3 7.8 27 24 75 27 75 15.5 15.0 8.3/15.5 7.8/15.0 35 30 95 35 95 23.0 18.0b 42 36 125
46、 42 125 27.0 27.0 15.5/27.0 15.0/27.0 42 36 125 42 125 38.0 38.0 27.0/38.0 27.0/38.0 70 60 150 70 150 aThe preferred ratings are in columns 1 and 2. Columns 1a and 2a were the preferred ratings prior to the 1996 revision of this standard. See 3.2.1. bApplicable to open-link cutouts only. 3.3.2 Inter
47、rupting breaking tests Distribution-class open and enclosed fuses and fuse cutouts, open and enclosed disconnecting switches, open-links used in open-link cutouts, and open and enclosed fuse disconnecting switches when tested as specified in Clause 6 of IEEE Std C37.41-2008 shall be capable of inter
48、rupting all currents from low current up to and including the rated interrupting current of the device, with any degree of asymmetry associated with the specified X/R ratio. Low current is the current that will melt the fusible element of the device in the long-time range (300 seconds minimum). Devi
49、ces that use the replaceable universal fuse links specified in Clause 4, or similar fuse links, shall be capable of interrupting these currents with any type and size fuse link recommended by the manufacturer. Universal fuse links are mainly used in combination with distribution-class open, enclosed, and open-link fuses, fuse cutouts, and fuse disconnecting switches. Interrupting requirements specified in this standard cover a specific combination of these components and other combinations cannot
