1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 1558Metal-Enclosed Low-VoltagePower Circuit BreakerSwitchgearUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NO
2、T AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL Standard for Safety for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear, UL 1558Fourth Edition, Dated February 25, 1999SUMMARY OF TOPICSThis revision to UL 1558 includes the following changes in requirement
3、s:Equipment Door Opening 90 Degrees from the Closed PositionText that has been changed in any manner or impacted by ULs electronic publishing system is markedwith a vertical line in the margin. Changes in requirements are marked with a vertical line in the marginand are followed by an effective date
4、 note indicating the date of publication or the date on which thechanged requirement becomes effective.The revised requirements are substantially in accordance with Proposal(s) on this subject dated October2, 2009 and November 9, 2009.The following table lists the future effective dates with the cor
5、responding reference.Future Effective Dates ReferencesJanuary 9, 2013 Paragraphs 2.1, 4.1, 5.1, 6.1.1, 7.1, 8.1.1, 10.1, 11.1,12.1.1, 13.1.1, 15.1,16.1.1, 16.3.1, 16.3.2, 17.1.1, 17.8.1,18.1, 19.1, and Sections 9A and 16A.All rights reserved. No part of this publication may be reproduced, stored in
6、a retrieval system, ortransmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwisewithout prior permission of UL.UL provides this Standard as is without warranty of any kind, either expressed or implied, including butnot limited to, the implied warranties of mer
7、chantability or fitness for any purpose.In no event will UL be liable for any special, incidental, consequential, indirect or similar damages,including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or theinability to use this Standard, even if UL or an a
8、uthorized UL representative has been advised of thepossibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid forthis Standard, regardless of the form of the claim.Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and
9、hold ULharmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonableattorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronicStandard on the purchasers computer system.The requirements in this Standard are now
10、 in effect, except for those paragraphs, sections, tables, figures,and/or other elements of the Standard having future effective dates as indicated in the note following theaffected item. The prior text for requirements that have been revised and that have a future effective dateare located after th
11、e Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice.APRIL 16, 2010 UL 1558 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAPRIL 16, 2010 UL 1558tr2No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUC
12、TION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFEBRUARY 25, 1999(Title Page Reprinted: April 16, 2010)1UL 1558Standard for Metal-Enclosed Low-Voltage Power Circuit BreakerSwitchgearFirst Edition June, 1983Second Edition September, 1988Third Edition October, 1993Fourth EditionFebruary 25, 1999This UL
13、Standard for Safety consists of the Fourth Edition including revisionsthrough April 16, 2010.Comments or proposals for revisions on any part of the Standard may besubmitted to UL at any time. Proposals should be submitted via a ProposalRequest in ULs On-Line Collaborative Standards Development Syste
14、m (CSDS)at http:/.ULs Standards for Safety are copyrighted by UL. Neither a printed nor electroniccopy of a Standard should be altered in any way. All of ULs Standards and allcopyrights, ownerships, and rights regarding those Standards shall remain thesole and exclusive property of UL.COPYRIGHT 2010
15、 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAPRIL 16, 2010UL 15582No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCT
16、ION1 Scope .72 Glossary .73 References .74 General 7CONSTRUCTION5 Accelerated Aging of Gaskets 86 Primary or Power Carrying Circuits 86.1 General .86.2 Bus bars 87 Grounding 138 Control and Secondary Wiring .158.1 General 158.2 Wiring terminals control circuits 159 Circuit Breakers .169A Location of
17、 Operating Means 1610 Receptacles 1611 Impact and Pressure Viewing Panes 1712 Spacings 1712.1 General .1712.2 Details 1812.3 Insulating barriers 2212.4 Clamped joint 2413 Service Equipment Use 24A13.1 General .24A13.2 Neutral disconnecting means 2713.3 Equipment on supply side of disconnect 2814 Mul
18、tiple Source Switchgear 2815 Corrosion Protection .28A16 Wiring Space .28A16.1 General 28A16.2 Wire bending space and gutter width 28A16.3 Clear wiring space 3216.4 Wiring .3216A Working Space 34MARKING17 General .3417.1 Details 3417.2 Location .3417.3 Service equipment 34A17.4 Ground fault protecti
19、on 3517.5 Main devices 3617.6 Emergency circuits .3617.7 Transformers 3717.8 Rainproof .37APRIL 16, 2010 UL 1558 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL17.9 Taps 37INSTALLATION INSTRUCTIONS18 Field Testing of Ground-Fault Protection
20、of Equipment 37PERFORMANCE19 General 38FEBRUARY 25, 1999UL 15584UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFEBRUARY 25, 1999 UL 1558 5No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHO
21、UT PERMISSION FROM ULThis page intentionally left blank.MARCH 27, 2006UL 15586UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover metal-enclosed low-voltage power circuit breaker switchgear assemblie
22、scontaining but not limited to such devices as low-voltage power circuit breakers, other interrupting devices,switches, control, instrumentation and metering, protective and regulating equipment.1.2 These requirements cover equipment intended for use in ordinary locations in accordance with theNatio
23、nal Electrical Code.1.3 These requirements are intended to supplement and be used in conjunction with the Standard forMetal-Enclosed Low Voltage Power Circuit Breaker Switchgear, ANSI C37.20.1, and the Standard forConformance Testing of Metal-Enclosed Low-Voltage AC Power Circuit Breaker Switchgear
24、Assemblies,ANSI C37.51.1.4 These requirements cover equipment rated 600 V ac or less nominal, 635 V ac maximum.1.5 Deleted March 27, 2006.2 Glossary2.1 TAP A terminal or provision for a terminal intended for field wiring that is located on the supplyside of the service disconnecting means. The tap i
25、s intended to be used in accordance with theNational Electrical Code, ANSI/NFPA 70.Revised 2.1 effective January 9, 20133 ReferencesSection 3 added February 25, 19993.1 Any undated reference to a code or standard appearing in the requirements of this standard shall beinterpreted as referring to the
26、latest edition of that code or standard.4 General4.1 Requirements for the equipment covered by this Standard are contained in the Standard forMetal-Enclosed Low-Voltage Circuit Breaker Switchgear, ANSI C37.20.1 and the Standard forConformance Testing of Metal-Enclosed Low-Voltage AC Power Circuit Br
27、eaker Switchgear Assemblies,ANSI C37.51. The requirements in this Standard shall be applied in addition to those contained in theabove documents, or as alternatives where so specified.Revised 4.1 effective January 9, 20134.2 It is specifically not intended that these requirements be used alone to ev
28、aluate these devices.4.3 Figures 4.1 4.3 show typical switchgear layouts. It is recognized that other arrangements arepossible.JULY 9, 2009 UL 1558 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONSTRUCTION5 Accelerated Aging of Gaskets5.1
29、The requirements of this section are applicable to gaskets relied upon to enable an enclosure to meetthe rain test specified in 6.2.10 of ANSI C37.20.1-2002.Revised 5.1 effective January 9, 20135.2 A gasket of an elastomeric or thermoplastic material or a composition gasket utilizing an elastomericm
30、aterial employed to make an enclosure rainproof shall comply with 5.3 and 5.4.5.3 If an enclosure is provided with a rubber or rubber-like gasket, samples of the gasket shall besubjected to a temperature of 70 1C (158 1.8F) in circulating air for 168 hours. The tensile strengthafter the exposure sha
31、ll not be less than 60 percent and the elongation shall not be less than 75 percentof the values determined with unaged samples.5.4 A gasket of thermoplastic material, or a composition thereof, may be accepted after consideration ofthe effects of heat aging, distortion under conditions of use, and t
32、he means of securing the gasket to thecover or enclosure.6 Primary or Power Carrying Circuits6.1 General6.1.1 The requirements of this section shall be applied in addition to those specified in 7.1.1 of ANSIC37.20.1-2002.Revised 6.1.1 effective January 9, 20136.2 Bus bars6.2.1 The bending of a bus b
33、ar shall not result in visible cracks, but roughening or slight surface crazingis acceptable.6.2.2 A bolted joint involving aluminum bus bars shall comply with the requirements of 6.2.3 and 6.2.4,unless:a) A spring washer as described in 6.2.6 is used at one end of each bolt securing current-carryin
34、g parts together is used, orb) A locknut or a split-ring lock washer and a flat washer as described in 6.2.5 is used andeach aluminum bus in the joint has a tensile yield strength of at least 20,000 psi (138 MPa).c) A flat washer, as described in 6.2.5, and aluminum bolts are used with aluminum bus
35、bars.6.2.3 A switchgear bus, as mentioned in 6.2.2, that employs a bolted joint construction with aluminum busbars shall be subjected to the test described in 6.2.4. The temperature rise at the joint during the 500thcycle shall not be more than 15C (27F) higher than the temperature rise at the 25th
36、cycle.Exception: Constructions described in 6.2.2 (a), (b), or (c), need not comply with this requirement.JULY 9, 2009UL 15588UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 4.1Typical switchgear layoutA. Utility Metering, see 13.2.5.B.
37、 GFP Sensor (Zero Sequence Type), see 13.1.5 13.1.13.C. GFP Sensor (Residual Type), see 13.1.5 13.1.13.D. GFP Sensor (Ground Return Type), see 13.1.5 13.1.13.E. Neutral Disconnect Link, see 7.11, 13.1.5 13.1.13, and 13.2.1 13.2.5. (For other than ground return type GFP, the neutraldisconnect link ma
38、y be located on the line or load side of the GFP sensor.)F. Main Bonding Jumper, see 7.6.G. Ground Bus, see 7.1 7.8.H. Frame and Structure Grounding, see 7.2.I. Grounding Electrode Conductor, see 7.4 and 13.1.5 13.1.13.FEBRUARY 25, 1999 UL 1558 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REP
39、RODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 4.2Typical double-ended switchgearaOther variations are possible.bTie breaker disconnect. See 14.1 and 14.2.cThe neutral bus and ground bus may be combined if ground return type ground fault protection is not used and the sections aremarked S
40、uitable only for use as service equipment.dGround return type ground fault protection sensor in accordance with 13.1.9.eZero sequence or residual type ground fault protection sensor in accordance with 13.1.7 and 13.1.8.fSize of main bonding jumper based on largest service disconnect.FEBRUARY 25, 199
41、9UL 155810UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 4.3Typical double-ended switchgearaTie breaker disconnect. See 14.1 and 14.2.bAdditional ground return type ground fault protection sensors utility interlocked withdso as to func
42、tion only when fault current isalso sensed byd.cSize of main bonding jumper based on largest service disconnect.dGround return type ground fault protection sensor in accordance with 13.1.9.eZero sequence or residual type ground fault protection sensor in accordance with 13.1.7 and 13.1.8.FEBRUARY 25
43、, 1999 UL 1558 11UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.2.4 The test sample is to consist of an assembly of bus bars connected together to form a series circuit.The bus bars are to be clamped together with the joint construction use
44、d in actual production. The numberand size of the bus bars are to represent the maximum ampere rating and the maximum current densityin which the joint construction is to be employed. This may necessitate more than one test. The length ofeach bus bar is to be not less than 2 ft (610 mm). The bus bar
45、 is to be connected to a power supply byany convenient means that will not affect the joint temperature. The power supply is to be adjusted todeliver a value of current that will result in a temperature of 75C (135F) above room temperature at thejoint. The assembly is then to be subjected to a 500 c
46、ycle test. At the end of the 24th cycle, the currentis to be readjusted to bring the temperature of the joint to 75C (135F) above room temperature. At theend of the 25th and 500th cycles, the temperatures are to be recorded. The temperatures are to bemeasured on both sides of the joint as close as p
47、ossible to the bolt. The cycling rate is to be 3 hours onand 1 hour off. The on period during which temperatures are recorded may be extended to more than 3hours if necessary for the joint to attain thermal equilibrium.6.2.5 The flat washer mentioned in 6.2.2 (b) and (c) shall have a nominal thickne
48、ss of at least 1/6 that ofthe diameter of the bolt and shall have an outer diameter at least 150 percent of bolt and not less than theouter diameter of any spring washer employed.6.2.6 A typical spring washer as mentioned in 6.2.2 is a dished washer of stainless, or hardened andtempered steel, havin
49、g an outer diameter not less than 150 percent of the bolt diameter, a thickness notless than 1/8 of the bolt diameter, and nominally dished not less than 3-1/2 percent of the bolt diameter.Other configurations are acceptable if they provide equivalent spring action.6.2.7 A construction other than described in 6.2.2 may be accepted if it is investigated and foundacceptable for the particular application.6.2.8 Unless investigated for such use, a bolted connection between two bus bars or between a bus barand ano
