1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA ICS 3-2005 (R2010)Industrial Control and Systems: Medium Voltage Controllers Rated 2001 to 7200 Volts ACNEMA Standards Publication ICS 3-2005 (R2010) Industrial Control and Systems: Medium Voltage Controllers Rated 2001 to 7
2、200 Volts AC Reaffirmed August 12, 2010 Published by: National Electrical Manufacturers Association 1300 North 17th Street, Suite 1752 Rosslyn, Virginia 22209 www.nema.org Copyright 2005 by the National Electrical Manufacturers Association. All rights including translation into other languages, rese
3、rved under the Universal Copyright Convention, the Berne Convention for 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
4、engaged in the development 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 gui
5、deline publications, of 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 admin
6、isters the process and establishes rules to promote fairness in the development 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 guidel
7、ine publications. NEMA disclaims liability for any personal injury, property, 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
8、 and makes no guaranty or warranty, express or implied, as to the accuracy 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 pe
9、rformance of any individual manufacturer or sellers products or services 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 perfor
10、m any duty owed by any 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 stan
11、dards on the topic covered by this publication may be available from other 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. NEM
12、A does not certify, test, or inspect products, designs, or installations 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
13、 or maker of the statement. Copyright 2005 by the National Electrical Manufacturers Association. ICS 3-2005 (R2010) Page i CONTENTS Foreword . iv Part 1: Medium Voltage Controllers Rated 2001 to 7200 Volts AC 1 GENERAL.1 1.1 Referenced Standards1 1.2 Scope2 1.3 Normative References2 2 DEFINITIONS .2
14、 3 CLASSIFICATIONS2 3.1 Class E1 Controllers.2 3.2 Class E2 Controllers.2 4 CHARACTERISTICS AND RATINGS 2 4.1 Continuous Current and Interrupting Ratings.2 4.1.1 General2 4.1.2 Service-Limit Current Rating.3 4.2 Basis of Interrupting Rating 3 4.3 Coordination within the Controller 3 4.3.1 Characteri
15、stics of Class E1 Controllers 3 4.3.2 Characteristics of Class E2 Controllers 4 5 PRODUCT MARKING, INSTALLATION, AND MAINTENANCE INFORMATION .5 5.1 Marking .5 5.2 Preventive Maintenance .6 5.2.1 General6 5.2.2 Precautions .6 5.2.3 Condensation 6 5.2.4 Contacts 6 5.3 Maintenance after a Fault Conditi
16、on 6 6 SERVICE AND STORAGE CONDITIONS .6 7 CONSTRUCTION.6 7.1 General .6 7.2 Power-Circuit Isolating Means7 7.3 Interlocking .7 7.4 Arrangement for Field Inspection .7 7.5 Equipment Protection .7 8 PERFORMANCE REQUIREMENTS AND TESTS 8 8.1 Verification of Fault Interrupting Rating 8 8.1.1 Fault Inter
17、ruption Test Circuit8 8.1.2 Power Factor of Fault Interruption Test Circuit .9 8.1.3 Fault Interruption Test Preparation .11 Copyright 2005 by the National Electrical Manufacturers Association. ICS 3-2005 (R2010) Page ii 8.1.4 Measurements to be Taken During the Fault Interruption Test 12 8.1.5 Faul
18、t Interruption Test Cycle .12 8.1.6 Interrupting Performance 12 8.1.7 Fault Withstandability 13 8.2 Basic Impulse Insulation Level (BIL) Tests 13 8.2.1 Impulse Test Voltage.13 8.2.2 Impulse Test Sequence 15 8.2.3 Test Procedure15 8.3 Power Frequency Dielectric Voltage Withstand Test.15 8.3.1 General
19、15 8.3.2 Test Procedures16 8.3.3 Relation to BIL Rating .16 8.4 Temperature Test .16 8.5 Range of Operating Voltage Test.16 8.6 Make and Break Capability.16 8.6.1 Basic Requirement16 8.6.2 Procedure16 8.6.3 Test Criteria.17 8.6.4 Combined Test17 8.7 Short-Time Capability .17 8.8 Overload Test .17 8.
20、8.1 Overload Test ProcedureGeneral .17 8.8.2 Overload Test ProcedureReversing Controllers .18 8.8.3 Overload Test Criteria .19 8.9 Production Tests.19 8.9.1 Power Frequency Dielectric Test 19 9 APPLICATION 19 9.1 Typical Methods of Motor Starting19 9.2 Determination of Motor Starting Current 19 9.2.
21、1 Full-Voltage Starting (Figure 1-9-1) 19 9.2.2 Resistor or Reactor Reduced-Voltage Starting (Figure 1-9-2) .20 9.2.3 Autotransformer Reduced-Voltage Starting (Figure 1-9-3).20 9.2.4 Part-Winding Starting (Figure 1-9-4).20 9.3 Coordination with Power Systems20 9.3.1 Considerations 20 9.3.2 Voltage C
22、oordination With Upstream Devices20 9.3.3 Current Coordination With Upstream Devices20 Part 2: AC General-Purpose Controllers for Synchronous Motors 1 GENERAL.24 1.1 Referenced Standards24 1.2 Scope24 Copyright 2005 by the National Electrical Manufacturers Association. ICS 3-2005 (R2010) Page iii 1.
23、3 Normative References24 2 DEFINITIONS .24 3 CLASSIFICATIONS24 3.1 Field Exciters 24 4 CHARACTERISTICS AND RATINGS 24 5 PRODUCT MARKING, INSTALLATION, AND MAINTENANCE INFORMATION .25 6 SERVICE AND STORAGE CONDITIONS .25 7 CONSTRUCTION.26 7.1 General .26 7.2 Protection Means26 7.3 Additional Features
24、.27 8 PERFORMANCE AND TESTS.27 9 APPLICATION 27 Copyright 2005 by the National Electrical Manufacturers Association. ICS 3-2005 (R2010) Page iv Foreword This Standards Publication was prepared by a technical committee of the NEMA Industrial Automation Control Products and Systems Section. It was app
25、roved in accordance with the bylaws of NEMA and supersedes the indicated NEMA Standards Publication. This Standards Publication Parts 2 almost all of the items in this publication, when applied properly, contribute to safety in one way or another. Properly constructed industrial control equipment is
26、, however, only one factor in minimizing the hazards which may be associated with the use of electricity. The reduction of hazard involves the joint efforts of the various equipment manufacturers, the system designer, the installer, and the user. Information is provided herein to assist users and ot
27、hers in the proper selection of control equipment. The industrial control manufacturer has limited or no control over the following factors which are vital to a safe installation: a. Environmental conditions b. System design c. Equipment selection and application d. Installation e. Operating practic
28、es f. Maintenance This publication is not intended to instruct the user of control equipment with regard to these factors except insofar as suitable equipment to meet needs can be recognized in this publication and some application guidance is given. This Standards Publication is necessarily confine
29、d to defining the construction requirements for industrial control equipment and to providing recommendations for proper selection for use under normal or certain specific conditions. Since any piece of industrial control equipment can be installed, operated, and maintained in such a manner that haz
30、ardous conditions may result, 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 person
31、s and property will be reduced. Copyright 2005 by the National Electrical Manufacturers Association. ICS 3-2005 (R2010) Page v To continue to serve the best interests of users of Industrial Control and Systems equipment, the Industrial Control and Systems Section is actively cooperating with other s
32、tandardization organizations in the development of simple and more universal metrology practices. In this publication, the 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 chan
33、ges in standard dimensions, tolerances, or performance specifications. NEMA Standards Publications are subject to periodic review. They are revised frequently to reflect user input and to meet changing conditions and technical progress. Proposed revisions to this Standards Publication should be subm
34、itted to: Vice President, Technical Services National Electrical Manufacturers Association 1300 North 17th Street, Suite 1752 Rosslyn, Virginia 22209 This standards publication was developed by the Industrial Automation Control Products and Systems Section. Section approval of the standard does not
35、necessarily imply that all section members voted for its approval or participated in its development. At the time it was approved, the Section was composed of the following members: ABB Inc. Carlo Gavazzi Automation Components Cooper Bussmann Cummins, Inc. Eaton Electrical, Inc. Electro Switch Corpo
36、ration Emerson Electric Co. Everlite Hybrid Industries Inc. GE Hubbell Incorporated Joslyn Clark Controls, Inc. L-3 Communications, Power Paragon Master Control Systems, Inc. Metron, Inc. Mitsubishi Electric Automation, Inc. Moeller Electric Corporation Omron Electronics LLC Phoenix Contact, Inc. Po
37、st Glover Resistors, Inc. Reliance Controls Corporation Rockwell Automation Russelectric, Inc. SEW-Eurodrive, Inc. Siemens Energy Inc. Square D Company Torna Tech Inc. Toshiba International Corporation Tyco Electronics/AMP WAGO Corporation Yaskawa Electric America, Inc. Copyright 2005 by the Nationa
38、l Electrical Manufacturers Association. ICS 3-2005 (R2010) Page vi Copyright 2005 by the National Electrical Manufacturers Association. ICS 3-2005 (R2010) Page 1 Part 1 MEDIUM VOLTAGE CONTROLLERS RATED 2001 TO 7200 VOLTS AC 1 GENERAL 1.1 Referenced Standards In this NEMA Standards Publication refere
39、nce is made to the standards listed below. Copies are available from the indicated sources. National Electrical Manufacturers Association 1300 North 17th Street, Suite 1752 Rosslyn, Virginia 22209 ICS 1-1993 Industrial Control and Systems General Requirements ICS 1.3-1986 (2001) Preventive Maintenan
40、ce of Industrial Control and Systems Equipment ICS 2-1993 Industrial Control Table 1-4-2 lists interrupting ratings of Class E1 controllers; Table 1-4-3 lists voltage and interrupting ratings of Class E2 controllers. Class E controllers shall not be used with motors whose full-load current exceeds t
41、he continuous current rating given in Table 1-4-1. The continuous current ratings shown in Table 1-4-1 represent the maximum Copyright 2005 by the National Electrical Manufacturers Association. ICS 3-2005 (R2010) Page 3 rms current, in amperes, which the controller may be expected to carry continuou
42、sly without exceeding the temperature rises given in Clause 8 of ICS 1. A Class E controller intended for use with nonmotor loads, such as capacitors or transformers, may require special consideration. 4.1.2 Service-Limit Current Rating The service-limit current ratings shown in Table 1-4-1 represen
43、t the maximum rms current, in amperes, which the controller may be expected to carry for protracted periods in normal service. The ultimate-trip current rating of overcurrent (overload) relays or of other motor protective devices used shall not exceed the service-limit current rating of the controll
44、er. When controllers are operated above the continuous current rating and up to the service-limit current rating, temperature rises will exceed those obtained by testing the controller at its continuous current rating. 4.2 Basis of Interrupting Rating The interrupting rating of a Class E controller
45、is expressed in terms of the maximum symmetrical MVA (megavoltamperes) or maximum rms symmetrical fault current and specific line-to-line voltage it can interrupt at the controller incoming line terminals. The symmetrical MVA rating is equal to the product of the rms symmetrical current that the con
46、troller can interrupt, the line-to-line open-circuit voltage, and a phase factor which is 1.73 x 10-6for three-phase applications. 4.3 Coordination within the Controller Class E Controllers should be provided with protection coordinated to meet specific load characteristics. Coordination consists of
47、 setting or selecting the characteristics of the various protective devices in the controller such that they operate only under the abnormal circuit condition for which they are intended. The relationship of individual devices (of similar function) to each other, should be such that the device inten
48、ded to protect against the abnormal lowest circuit condition operates first. 4.3.1 Characteristics of Class E1 Controllers Running overcurrent protective units for Class E1 controllers should be selected to: a. Prevent continuous operation above the service limit of the controller b. Prevent excessi
49、ve heating of branch circuit conductors and connected load Contactors should be selected to be able to: a. Continuously carry overload relay ultimate trip current b. Interrupt normal running currents, operating overload currents, and faults occurring at or beyond the controller load terminals Copyright 2005 by the National Electrical Manufacturers Association. ICS 3-2005 (R2010) Page 4 4.3.2 Characteristics of Class E2 Controllers Running overcurrent protective units for Class E2 controllers should be selected to: a. Prevent continuous operation above the service-limit
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