NEMA ICS 10 PART 2-2005 Industrial Control and Systems PART 2 STATIC AC TRANSFER EQUIPMENT.pdf

1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA ICS 10-2005 PART 2Industrial Control and Systems Part 2: Static AC Transfer EquipmentNEMA Standards Publication ICS 10-2005 Industrial Control and Systems Part 2: Static AC Transfer Equipment Published by: National Electrica

2、l Manufacturers Association 1300 North 17th Street, Suite 1847 Rosslyn, Virginia 22209 www.nema.org Copyright 2005 by the National Electrical Manufacturers Association. All rights, including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for

3、 the Protection of Literary and Artistic Works, and the International and Pan American Copyright Conventions. NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the development and approval of the document at the time it

4、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, of which the document contained herein is one, are

5、 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 establishes rules to promote fairness in the dev

6、elopment of consensus, it does not write the document and it does not independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contained in its standards and guideline publications. NEMA disclaims liability for any personal injury, pro

7、perty, or other damages of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, application, or reliance on this document. NEMA disclaims and makes no guaranty or warranty, express or implied, as to the accur

8、acy or completeness of any information published herein, and disclaims and makes no warranty that the information in this document will fulfill any of your particular purposes or needs. NEMA does not undertake to guarantee the performance of any individual manufacturer or sellers products or service

9、s by virtue of this standard or guide. In publishing and making this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owed by any person or entity to someone else. Anyone using t

10、his 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 covered by this publication may be available from ot

11、her sources, which the user may wish to consult for additional views or information not covered by this publication. NEMA has no power, nor does it undertake to police or enforce compliance with the contents of this document. NEMA does not certify, test, or inspect products, designs, or installation

12、s for safety or health purposes. Any certification or other statement of compliance with any health or safetyrelated information in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement. ICS 10-2005, Part 2 Static AC Transfer Equi

13、pment Page i Copyright 2005 by the National Electrical Manufacturers Association. CONTENTS FOREWORD . iii Part 2 STATIC AC TRANSFER EQUIPMENT 1 1 SCOPE1 1.1 General.1 1.2 Normative References.1 2 DEFINITIONS 2 2.1 Transfer Equipment.2 2.2 Operation of Static Transfer Equipment .2 3 CLASSIFICATIONS3

14、4 CHARACTERISTICS AND RATINGS3 4.1 Rated and Limiting Values for the Main (Power) Circuit3 4.1.1 System Voltage Ratings.3 4.1.2 Continuous Current Rating 3 4.1.3 Rating Based on Load Characteristics .3 4.1.4 Interrupting Rating.4 4.1.5 Motor Starter Rating 4 4.1.6 Withstand and Closing Ratings 4 4.1

15、.7 Overcurrent Protection 4 5 PRODUCT MARKING, INSTALLATION, AND MAINTENANCE INFORMATION5 5.1 Markings.5 5.1.1 Transfer Equipment .5 5.1.2 Bypass Isolation Switch Equipment6 5.1.3 Control Circuits .6 5.2 Maintenance of Transfer Equipment 6 6 SERVICE AND STORAGE CONDITIONS .6 7 CONSTRUCTION.6 7.1 Spa

16、cings.6 7.2 Test Switch .7 7.3 Interlocks and Protective Circuits 7 7.3.1 Protection from Cross-Connection .7 7.3.2 Bypass Isolation Switch Interlock.7 7.4 Service Equipment 7 7.5 Emergency Power Circuit Service7 7.6 Control Circuits .7 8 PERFORMANCE REQUIREMENTS AND TESTS9 8.1 Performance Requireme

17、nts .9 8.1.1 Control Circuits .9 8.1.2 Ground-Fault Protection 9 8.1.3 Undervoltage Monitoring Characteristics9 8.2 Design Tests.9 ICS 10-2005, Part 2 Static AC Transfer Equipment Page ii Copyright 2005 by the National Electrical Manufacturers Association. 8.2.1 Required Testing .9 8.2.2 Optional Pe

18、rformance Verification 10 9 APPLICATION . 11 9.1 AC Transfer Equipment Specification 11 9.2 Power Quality . 11 9.3 Motor Transfer 14 9.4 Features for Particular Applications. 14 9.5 Considerations for Non-Linear Load Applications. 16 9.6 Graphical Symbol for Static Transfer Equipment 16 ANNEX A Non-

19、Linear Loads. 18 A.1 General. 18 A.2 Non-Linear Electrical Load 18 A.3 Crest Factor (CF) of a System. 18 Annex B Short Time Rating 20 Annex C Neutral Conductors in Power Transfer Systems 22 C.1 Separately Derived Sources 22 C.2 Non-Separately Derived Sources. 23 ICS 10-2005, Part 2 Static AC Transfe

20、r Equipment Page iii Copyright 2005 by the National Electrical Manufacturers Association. FOREWORD This Standards Publication was prepared by a technical committee of the NEMA Industrial Control and Systems Section. It was approved in accordance with the bylaws of NEMA. ICS 10-1999, Part 2 is a cont

21、inuation of ICS 10-1993 which superseded Part ICS 2-447 of NEMA Publication ICS 2-1988. This Standards Publication provides practical information concerning ratings, construction, test, performance and manufacture of industrial control equipment. These standards are used by the electrical industry t

22、o provide guidelines for the manufacture and proper application of reliable products and equipment and to promote the benefits of repetitive manufacturing and widespread product availability. NEMA Standards represent the result of many years of research, investigation and experience by the members o

23、f NEMA, its predecessors, its Sections and Committees. They have been developed through continuing consultation among manufacturers, users and national engineering societies and have resulted in improved serviceability of electrical products with economies to manufacturers and users. One of the prim

24、ary purposes of this Standards Publication is to encourage the production of reliable control equipment which, in itself, functions in accordance with these accepted standards. Some portions of these standards, such as electrical spacings and interrupting ratings, have a direct bearing on safety; al

25、most all of the items in this publication, when applied properly, contribute to safety in one way or another. Properly constructed industrial control equipment is, however, only one factor in minimizing the hazards which may be associated with the use of electricity. The reduction of hazard involves

26、 the joint efforts of the various equipment manufacturers, the system designer, the installer and the user. Information is provided herein to assist users and others in the proper selection of control equipment. The industrial control manufacturer has limited or not control over the following factor

27、s which are vital to a safe installation: 1. Environmental conditions 2. System design 3. Equipment selection and application 4. Installation 5. Operation practices 6. Maintenance This publication is not intended to instruct the user of control equipment with regard to these factors except insofar a

28、s suitable equipment to meet needs can be recognized in this publication and some application guidance is given. This Standards Publication is necessarily confined to defining the construction requirements for industrial control equipment and to providing recommendations for proper selection for use

29、 under normal or certain specific conditions. Since any piece of industrial control equipment can be installed, operated and maintained in such a manner that hazardous conditions may result, ICS 10-2005, Part 2 Static AC Transfer Equipment Page iv Copyright 2005 by the National Electrical Manufactur

30、ers Association. conformance with this publication does not by itself assure a safe installation. When, however, equipment conforming with these standards is properly selected and is installed in accordance with the National Electrical Code and properly maintained, the hazards to persons and propert

31、y will be reduced. U.S. customary units are gradually being supplemented by those of the modernized metric system known as the International Systems of Units (SI). This transition involves no changes in standard dimensions, tolerances, or performance specifications. NEMA Standards Publications are s

32、ubject to periodic review. They are revised frequently to reflect user input and to meet changing conditions and technical progress. Users should secure the latest editions. Proposed additions to this Standards Publication should be submitted to: Vice President, Technical Services Department Nationa

33、l Electrical Manufacturers Association 1300 North 17th Street Rosslyn, Virginia 22209 This Standards Publication was developed by the Industrial Control and Systems Section. Section approval of the standard does not necessarily imply that all section members voted for its approval or participated in

34、 its development. At the time it was approved, the Section was composed of the following members: ABB Control, Inc.Wichita Falls, TX ABB Automation Technologies Raleigh, NC ASCO Power TechnologiesFlorham Park, NJ Automatic Switch Company Florham Park, NJ c3controlsBeaver, PA California Linear Device

35、s Carlsbad, CA CARLO GAVAZZI, INC.Buffalo Grove, IL Cooper Bussman St. Louis, MO Cummins, Inc.Minneapolis, MN Eaton Electrical, Inc.Milwaukee, WI Electro Switch CorporationWeymouth, MA Emerson Process ManagementAustin, TX GE Consumer & IndustrialCharlottesville, VA Hubbell IncorporatedWadsworth, OH

36、Hubbell Industrial Controls, Inc.Archdale, NC Joslyn Clark Controls, Inc.Lancaster, SC L-3 Communications/SPD Technologies Anaheim, CA Master Controls Systems, Inc.Lake Bluff, IL Metron, Inc.Denver, CO Mitsubishi Electric Automation, Inc.Vernon Hills, IL Moeller Electric CorporationHouston, TX Omron

37、 Electronics LLCSchaumburg, IL Peerless ElectricWarren, OH Phoenix Contact, Inc.Harrisburg, PA Post Glover Resistors, Inc.Erlanger, KY Reliance Controls CorporationRacine, WI Rockwell AutomationMilwaukee, WI Russelectric, Inc.Hinngham, MA Schneider Automation, Inc.North Andover, MA Schneider Electri

38、c North America/Square D CompanyRaleigh, NC Schneider North American Operation DivisionLexington, KY ICS 10-2005, Part 2 Static AC Transfer Equipment Page v Copyright 2005 by the National Electrical Manufacturers Association. SEW-Eurodrive, Inc.Lyman, SC Siemens Corporate ResearchPrinceton, NJ Sieme

39、ns Energy & Automation, Inc.Norcross, GA Siemens Shared Services LLCDuluth, GA Square D CompanyRaleigh, NC Torna Tech Inc.Saint-Laurent, Canada Toshiba International CorporationHouston, TX Total Control Products, Inc.Terrace Park, OH Tyco Electronics/AMPHarrisburg, PA WAGO CorporationGermantown, WI

40、Weidmuller Inc.Richmond, VA Yaskawa Electric America, Inc.Waukegan, IL ICS 10-2005, Part 2 Static AC Transfer Equipment Page vi Copyright 2005 by the National Electrical Manufacturers Association. ICS 10-2005, Part 2 Static AC Transfer Equipment Page 1 Copyright 2005 by the National Electrical Manuf

41、acturers Association. Part 2 STATIC AC TRANSFER EQUIPMENT 1 SCOPE The standards in this part apply to static automatic and static non-automatic transfer equipment without cross-connection of sources during transfer or retransfer, with or without bypass isolation switches rated 600 volts AC or less,

42、not exceeding 6000 amps, for use on single-phase and polyphase AC circuits. Static transfer equipment that does have cross-connection of sources during transfer or retransfer is outside the scope of this standard. 1.1 General The definitions and standards of ICS 1, except for clause 7 pertaining to

43、spacings as indicated, also apply to this standard. These requirements cover solid state automatic transfer equipment intended for use in ordinary locations to provide for lighting and power only in optional stand-by systems in accordance with Article 702 of the National Electrical Code, ANSI/NFPA 7

44、0. 1.2 Normative References In this NEMA Standards Publication, reference is made to the following standards listed below. Copies are available from the indicated sources. National Electrical Manufacturers Association 1300 North 17th Street Rosslyn, Virginia 22209 ICS 1-1993 Industrial Control and S

45、ystems General Requirements ICS 1.3-1986 (R1991) Preventive Maintenance of Industrial Control and Systems Equipment MG 1-1998 Motors and Generators Underwriters Laboratories Inc. 333 Pfingsten Road Northbrook, IL 60062 UL 869A Service Equipment UL 1008 Transfer Switch Equipment ICS 10-2005, Part 2 S

46、tatic AC Transfer Equipment Page 2 Copyright 2005 by the National Electrical Manufacturers Association. National Fire Protection Association Batterymarch Park Quincy, MA 02269 NFPA 70 National Electrical Code (NEC) NFPA 99 Health Care Facilities 2 DEFINITIONS For the purposes of this NEMA Standards

47、Publication, the following definitions apply. 2.1 Transfer Equipment bypass isolation switch: A manually operated device used in conjunction with transfer equipment to provide a means of directly connecting load conductors to a power source and of disconnecting the transfer equipment. A bypass isola

48、tion switch may be supplied with an automatic or non-automatic transfer equipment. static automatic transfer equipment: Self-acting equipment using electronic power devices for transferring one or more load conductor connections from one power source to another. Static automatic transfer equipment m

49、ay include logic to inhibit automatic operation in either or both directions, provided the equipment reverts to automatic operation upon loss of power to the load. Static automatic transfer equipment may be supplied with or without a bypass isolation switch. static nonautomatic transfer equipment: Manually controlled equipment using electronic power devices for transferring one or more load conductor connections from one power source to another. Nonautomatic transfer equipment may be supplied with or without a bypass is