1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1562 Transformers, Distribution, Dry-Type Over 600 VoltsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT
2、AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Transformers, Distribution, Dry-Type Over 600 Volts, UL 1562 Fourth Edition, Dated January 25, 2013 Summary of Topics This new edition of UL 1562 includes the following revisions: Clarication fo
3、r Partial Discharge Test The revised requirements are substantially in accordance with Proposal(s) on this subject dated September 18, 2015. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. All rights reserved. No
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8、asers computer system. OCTOBER 22, 2015 UL 1562 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 22, 2015 UL 1562 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMI
9、SSION FROM UL JANUARY 25, 2013 (Title Page Reprinted: October 22, 2015) 1 UL 1562 Standard for Transformers, Distribution, Dry-Type Over 600 Volts First Edition December, 1988 Second Edition January, 1994 Third Edition March, 1999 Fourth Edition January 25, 2013 This UL Standard for Safety consists
10、of the Fourth Edition including revisions through October 22, 2015. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs
11、 Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2015 UNDERWRITERS LAB
12、ORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 25, 2013 TRANSFORMERS, DISTRIBUTION, DRY-TYPE OVER 600 VOLTS - UL 1562 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTIO
13、N WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 Components .5 3 Units 5 4 References 5 CONSTRUCTION 5 Mechanical Assembly .5 6 Enclosures .6 7 Guarding and Accessibility of Live Parts .6 8 Insulation Systems 6 9 Spacings 7 10 Transformers Supplied With a K-Factor Rating 8 11 Coil Det
14、ails .10 PERFORMANCE 12 General 10 13 Conformance Tests 11 14 Transient Voltage Analysis Test .11 15 Transformers Supplied With a K-Factor Rating 11 16 Partial Discharge Test .13 MARKING 17 General 13 MANUFACTURING AND PRODUCTION LINE TESTS 18 General 14 JANUARY 25, 2013 TRANSFORMERS, DISTRIBUTION,
15、DRY-TYPE OVER 600 VOLTS - UL 1562 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover single-phase or three-phase, dry-type, distribution transformers, including solid cast and resin encapsulate
16、d transformers. The transformers are provided with either ventilated or non-ventilated enclosures and are rated for a primary or secondary voltage from 601 to 35000 V. 1.2 These transformers are intended for installation in accordance with the National Electrical Code, ANSI/NFPA 70. 1.3 These requir
17、ements do not cover the following transformers: a) Instrument transformers b) Step-voltage and induction voltage regulators c) Current regulators d) Arc furnace transformers e) Rectier transformers f) Specialty transformers (such as rectier, ignition, gas tube sign transformers, and the like) g) Min
18、ing transformers h) Motor-starting reactors and transformers 1.4 These requirements do not cover transformers under the exclusive control of electrical utilities utilized for communication, metering, generation, control, transformation, transmission, and distribution of electric energy regardless of
19、 whether such transformers are located indoors, in buildings and rooms used exclusively by utilities for such purposes; or outdoors on property owned, leased, established rights on private property or on public rights of way (highways, streets, roads, and the like). JANUARY 25, 2013 TRANSFORMERS, DI
20、STRIBUTION, DRY-TYPE OVER 600 VOLTS - UL 1562 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this Standard shall comply with the requirements for that compone
21、nt. 2.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.3 A component shall be used in acco
22、rdance with its rating established for the intended conditions of use. 2.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limit
23、s, and shall be used only under those specic conditions. 3 Units 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 4 References 4.1 Any undated reference to a code or standard appearing in the requirements of this standard sh
24、all be interpreted as referring to the latest edition of that code or standard. CONSTRUCTION 5 Mechanical Assembly 5.1 A transformer shall be so formed and assembled that it will have the strength and rigidity necessary to resist the abuses to which it is likely to be subjected, without increasing t
25、he risk of electric shock, re, or injury to persons due to total or partial collapse with resulting reduction of spacings, loosening or displacement of parts, or other serious defects. JANUARY 25, 2013 TRANSFORMERS, DISTRIBUTION, DRY-TYPE OVER 600 VOLTS - UL 1562 5UL COPYRIGHTED MATERIAL NOT AUTHORI
26、ZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6 Enclosures 6.1 The enclosure shall comply with the requirements in Section 4 of the American National Standard for Transformers Used in Unit Installations, Including Unit Substations Conformance Standard, ANSI C57.12.55. 7 Gua
27、rding and Accessibility of Live Parts 7.1 When access is required to a compartment that contains energized high voltage parts, barriers shall be provided to reduce the risk of: a) Unintentional contact with energized parts. b) Dropping tools or other equipment on energized parts. 7.2 Low-voltage ene
28、rgized uninsulated live parts mounted on doors shall be effectively guarded or enclosed to reduce the risk of unintentional contact if and when the door must be opened for maintenance of equipment. 7.3 Any barrier intended to be removed during routine maintenance or servicing shall be marked to indi
29、cate that it is to be replaced. 8 Insulation Systems 8.1 The insulation system used in the transformer shall be one that has been evaluated in accordance with the thermal aging procedure described in the IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Dry-Type Power and
30、 Distribution Transformers, Including Open Wound, Solid-Cast, and Resin-Encapsulated Transformers, ANSI/IEEE C57.12.60 and has been found to be acceptable for the temperatures and voltages involved. Transformers with solid cast or resin encapsulated insulation systems shall be evaluated in accordanc
31、e with the IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Dry-Type Power and Distribution Transformers, Including Open-Wound, Solid-Cast, and Resin-Encapsulated Transformers, ANSI/IEEE C57.12.60. 8.2 Material substitutions in the insulation system shall be in accordanc
32、e with the requirements in the Standard for Systems of Insulating Materials General, UL 1446. OCTOBER 22, 2015 TRANSFORMERS, DISTRIBUTION, DRY-TYPE OVER 600 VOLTS - UL 1562 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 9 Spacings 9.1 The
33、minimum spacings at eld wiring terminals involving voltages of 600 volts or less shall be as indicated in Table 9.1. Table 9.1 Minimum spacings at eld wiring terminals Voltage involved Minimum spacings between uninsulated live parts of opposite polarity and between an uninsulated live part and a gro
34、unded part of a conductive material a Through air b Over surface b inch (mm) inch (mm) 0 50 1/8 (3.2) 1/4 (6.4) 51 250 1/2 (12.7) 1/2 (12.7) 251 600 1 (25.4) 1 (25.4) a An isolated part of conductive material (such as a screw head or washer) interposed between uninsulated live parts of opposite pola
35、rity or between an uninsulated live part and grounded dead metal is considered to reduce the spacing by an amount equal to the dimension of the interposed part along the path of measurement. b A minimum spacing of 1 inch (25.4 mm) is required between a live part and a metal enclosure. 9.2 The minimu
36、m spacings at a point other than a eld wiring terminal involving voltages of 600 volts or less shall be as indicated in Table 9.2. Table 9.2 Minimum spacings at points other than eld wiring terminals Voltage involved Minimum spacings between uninsulated live parts of opposite polarity and between an
37、 uninsulated live part and a grounded part of a conductive material a Through air Over surface inch (mm) inch (mm) 0 50 1/16 (1.6) 1/16 (1.6) 51 125 1/8 (3.2) 1/4 (6.4) 126 250 1/4 (6.4) 3/8 (9.5) 251 600 3/8 (9.5) 1/2 (12.5) a An isolated part of conductive material (such as a screw head or washer)
38、 interposed between uninsulated live parts of opposite polarity or between an uninsulated live part and grounded dead metal is considered to reduce the spacing by an amount equal to the dimension of the interposed part along the path of measurement. JANUARY 25, 2013 TRANSFORMERS, DISTRIBUTION, DRY-T
39、YPE OVER 600 VOLTS - UL 1562 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 10 Transformers Supplied With a K-Factor Rating 10.1 K-FACTOR A rating optionally applied to a transformer indicating its suitability for use with loads that draw
40、nonsinusoidal currents. The k-factor equals: in which: I h (pu) = the rms current at harmonic h (per unit of rated rms load current) and h = the harmonic order. K-factor rated transformers have not been evaluated for use with harmonic loads where the rms current of any singular harmonic greater than
41、 the tenth harmonic is greater than 1/h of the fundamental rms current. 10.2 If a pressure terminal connector for eld wiring of the neutral conductor on a transformer marked with a K-factor rating in accordance with 17.3 is factory-installed, the connector shall accommodate a conductor sized for at
42、least 200 percent of the line current based on the transformer full load rating and Table 10.1. Table 10.1 Ampacities of insulated conductors rated 0 2000 volts a Wire size 60C (140F) 75C (167) AWG (mm 2 ) Copper Aluminum Copper Aluminum 14 (2.1) 15 15 12 (3.3) 20 15 20 15 10 (5.3) 30 25 20 25 8 (8.
43、4) 40 30 50 40 6 (13.3) 55 40 65 50 4 (21.2) 70 55 85 65 3 (26.7) 85 65 100 75 2 (33.6) 95 75 115 90 1 (42.4) 110 85 130 100 1/0 (53.5) 150 120 2/0 (67.4) 175 135 3/0 (85.0) 200 155 4/0 (107.2) 230 180 kcmil 250 (127) 255 205 300 (152) 285 230 350 (177) 310 250 400 (203) 335 270 500 (253) 380 310 JA
44、NUARY 25, 2013 TRANSFORMERS, DISTRIBUTION, DRY-TYPE OVER 600 VOLTS - UL 1562 8 Table 10.1 Continued on Next PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table 10.1 Continued Wire size 60C (140F) 75C (167) AWG (mm 2 ) Copper Aluminum C
45、opper Aluminum 600 (304) 420 340 700 (355) 460 375 750 (380) 475 385 800 (405) 490 395 900 (456) 520 425 1000 (506) 545 445 1250 (633) 590 485 1500 (760_ 625 520 1750 (887) 650 545 2000 (1013) 665 560 a These values of ampacity apply only where a maximum of three current-carrying conductors will be
46、eld installed in a single conduit. If more than three conductors are to be installed, it is assumed that multiple conduits will be used. For ampacities exceeding those shown in this Table, it is assumed that multiple conductors within the range of 1/0 AWG to 500 kcmil will be used. For multiple cond
47、uctors, the ampacity value of each conductor is to be multiplied by the number of conductors. 10.3 The neutral bus bar and a terminal pad provided for securing the neutral pressure terminal connector on a transformer marked with a K-factor rating in accordance with 17.3 shall be sized based on the t
48、ransformer full load current and the following maximum current densities: a) Five-hundred amperes per square inch (77.5 A/cm 2 ) of cross section for solid copper; b) Three-hundred and seventy-ve ampere per square inch (58 A/cm 2 ) of cross section for solid aluminum having a conductivity of at leas
49、t 55 percent that of the International Annealed Copper Standard; c) One-hundred amperes per square inch (15.5 A/cm 2 ) of contact area at bolted contacts between copper bus bars and connecting straps or connectors. In determining the contact area of a bolted or riveted connection, no additions or subtractions shall be made for the area of screws, bolts, or rivets; and d) Seventy-ve amperes per square inch (11.6 A/cm 2 ) of contact area at bolted contacts bet
