1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA ICS 3.1-2009 (R2014)Guide for the Application, Handling, Storage, Installation, and Maintenance of Medium-Voltage AC Contactors, Controllers, and Control CentersNEMA Standards Publication ICS 3.1-2009 (R2014) Guide for the A
2、pplication, Handling, Storage, Installation, and Maintenance of Medium-Voltage AC Contactors, Controllers, and Control Centers Published by National Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, Virginia 22209 www.nema.org 2009 National Electrical Manufacturers Asso
3、ciation. All rights, including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American copyright conventions. 2009 National Electrical Manufacturers Association
4、 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 was developed. Consensus does not necessarily mean that there is unanimous agreement among every person parti
5、cipating in the development of this document. NEMA standards and guideline 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
6、 interest in the topic covered by this publication. While NEMA administers 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
7、the soundness of any judgments contained in its standards and guideline 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 publicatio
8、n, use of, application, or reliance on this document. NEMA disclaims 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 parti
9、cular purposes or needs. NEMA does not undertake to guarantee the performance 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
10、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 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 re
11、asonable care in any given circumstances. Information and other standards 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
12、police or enforce compliance with the contents of this document. NEMA 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 at
13、tributable to NEMA and is solely the responsibility of the certifier or maker of the statement. NEMA ICS 3.1-2009 (R2014) Page i 2009 National Electrical Manufacturers Association TABLE OF CONTENTS Foreword iv 1 SCOPE 1 2 SELECTION AND APPLICATION . 2 2.1 Ratings and Characteristics 2 2.2 Selection
14、of Ratings and Characteristics for Service Conditions 2 2.3 Control of Motor Loads . 5 2.4 Additional Considerations for Synchronous Motors 8 2.5 Control of Non-Motor Loads 10 2.6 Coordination with Power Systems 12 3 ORDERING INFORMATION 15 3.1 Application Ratings . 15 4 GENERAL INFORMATION AFTER RE
15、CEIVING 17 4.1 Precautions . 17 4.2 Recommended Procedure 17 4.3 References 17 4.4 Qualified Person 17 4.5 Manufacturers Instructions 17 4.6 Conditions during Transport, Storage, and Installation . 18 4.7 Precautions . 18 5 HANDLING . 19 5.1 General . 19 5.2 Unpacking/Packing . 19 5.3 Moving . 19 6
16、STORAGE 22 6.1 Controllers for Indoor Installation 22 6.2 Controllers for Outdoor Installation . 22 6.3 Routine Inspection 22 7 INSTALLATION 23 7.1 General . 23 7.2 Site Preparation 23 7.3 Physical Clearance Considerations 23 7.4 Normal Service Conditions . 23 7.5 Special Service Conditions . 23 7.6
17、 Assembly . 24 8 CONDUCTORS 25 8.1 Physical Considerations 25 8.2 Electrical Considerations 25 8.3 Bus Interconnection Links . 25 8.4 Cleanup during Installation . 25 NEMA ICS 3.1-2009 (R2014) Page ii 2009 National Electrical Manufacturers Association 9 GROUNDING 26 9.1 General . 26 9.2 Controller U
18、sed as Service Entrance Equipment for a System with a Neutral . 26 9.3 Controller Used as Service Entrance Equipment for a System without a Neutral 26 9.4 Controller Used as a Main Section for a Separately Derived System 27 9.5 Controllers not Used as Service Entrance Equipment nor as a Main Section
19、 for a Separately Derived System 27 10 INSPECTION PRIOR TO INITIAL ENERGIZATION 28 10.1 Remove Shorting Jumpers . 28 10.2 Remove Temporary Shipping Blocking. 28 10.3 Bus Bracing Integrity . 28 10.4 Connections 28 10.5 Possible Damage 28 10.6 Operating Mechanisms . 29 10.7 Ground-Fault Protection Sys
20、tem . 29 10.8 Adjustable Current and Voltage Trip Mechanisms . 29 10.9 Overload Relays 29 10.10 Removable Permanent Parts and Barriers . 29 10.11 Cleaning 29 10.12 Electrical Insulation Test . 29 10.13 Final Installation Inspection . 29 10.14 Enclosure 30 11 INITIAL ENERGIZATION OF EQUIPMENT . 31 11
21、.1 Manufacturers Instruction . 31 11.2 General . 31 11.3 Contactors and Switches 31 11.4 Loads 31 11.5 Energization Sequence . 31 11.6 Individual Loads after Disconnect Device Closure . 31 11.7 Records . 31 11.8 Spare parts 32 12 MAINTENANCE AND USE 33 12.1 Fundamentals . 33 12.2 Safety Precautions
22、34 12.3 General Guidelines . 34 12.4 Specific Guidelines 36 12.5 Maintenance of Controllers After a Fault Condition 38 12.6 Controller Failures . 39 NEMA ICS 3.1-2009 (R2014) Page iii 2009 National Electrical Manufacturers Association FIGURES Figure 1 Time vs. Prospective Current 4 Figure 2 Full-Vol
23、tage Starting 5 Figure 3 Reduced-Voltage Reactor or Resistor Starting . 6 Figure 4 Reduced-Voltage Auto-Transformer Starting . 7 Figure 5 Part-Winding Starting 8 Figure 6 Lifting with Eye-Bolts or Lifting Plates . 20 Figure 7 Lifting with Integral Lift Angle 21 NEMA ICS 3.1-2009 (R2014) Page iv 2009
24、 National Electrical Manufacturers Association FOREWORD This publication is a guide containing practical information to the application, handling, storage, installation and maintenance of AC general-purpose medium-voltage contactors and Class E controllers. It was prepared by the Medium Voltage Cont
25、rollers Technical Subcommittee of the NEMA Industrial Automation Control Products and Systems Section. It was approved in accordance with the bylaws of NEMA. This guide was developed in response to the many questions from the user public and has been developed from the experience of the member compa
26、nies working with their customers and users. It provides information that will be useful to architects, electrical engineers, electrical contractors, maintenance engineers, and others who are responsible for the installation of this equipment. It is not intended to replace the manufacturers instruct
27、ions and does not purport to cover all possible circumstances arising from the handling, storage, and installation of this equipment. Any problems or questions should be discussed with the manufacturer. NEMA publications are subject to periodic review. Any comments or proposed revisions to this guid
28、e should be submitted 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 st
29、andard does not necessarily imply that all section members voted for its approval or participated in its development. At the time it was approved, the Group/Section was composed of the following members: ABB Inc. Carlo Gavazzi Automation Components Cooper Bussmann Cummins, Inc. Eaton Electrical, Inc
30、. Electro Switch Corporation 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 Ph
31、oenix Contact, Inc. Post 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. NEMA I
32、CS 3.1-2009 (R2014) Page 1 2009 National Electrical Manufacturers Association 1 SCOPE This guide applies to AC medium-voltage contactors and Class E controllers rated 1,501-15,000 volts, installed in accordance with the National Electrical Code (NEC), NFPA 70 and the manufacturers instructions. The
33、requirements in the CANENA-developed UL 347 and NEMA SG 10-2008 apply. These instructions are not considered appropriate to industrial control equipment intended for use in locations designated as hazardous (classified) in the National Electrical Code. This guide was developed in response to the man
34、y questions from the user public and has been developed from the experience of the member companies working with their customers and users. It provides information that will be useful to architects, electrical engineers, electrical contractors, maintenance engineers, and others who are responsible f
35、or the installation of this equipment. It is not intended to replace the manufacturers instructions and does not purport to cover all possible circumstances arising from the application, handling, storage, and installation of this equipment. Any problems or questions should be discussed with the man
36、ufacturer. NoteExtension of the voltage range in UL 347 to extend up to 15 Kv is under consideration. NEMA ICS 3.1-2009 (R2014) Page 2 2009 National Electrical Manufacturers Association 2 SELECTION AND APPLICATION A controller, suitable for a given duty in service, is best selected by considering th
37、e individual rated values required by load conditions and fault conditions. 2.1 RATINGS AND CHARACTERISTICS The rated characteristics defined in this clause are further discussed in UL 347 in the clause number shown. a. rated voltage (Ur): 4.1 b. rated insulation level (Ud) (power-frequency withstan
38、d test voltage), (Up) (impulse test voltage): 4.2 c. rated frequency (fr): 4.3 d. rated short-time withstand current (Ik): 4.5 e. rated peak withstand current (Ip): 4.6.1 f. rated duration of short circuit (tk): 4.7 g. rated supply voltage of operating devices, and of auxiliary and control circuits
39、(Ua): 4.8 h. rated supply frequency of closing and opening devices and of control circuits: 4.9 i. rated making and breaking capacities: 4.103 j. mechanical endurance: 4.105 k. rated continuous (thermal) current (Ith): 4.4.101 l. coordination with medium-voltage fuses: 4.107 m. starting autotransfor
40、mer or reactor characteristics: 4.109 n. use at high altitudes: 2.2.1 2.2 SELECTION OF RATINGS AND CHARACTERISTICS FOR SERVICE CONDITIONS 2.2.1 Selection of Rated Voltage The rated voltage of the equipment should be chosen so as to be at least equal to the highest continuous voltage of the system at
41、 the point where it is to be installed. The rated voltage should be selected from the standard values given in UL 347, clause 4.1. 2.2.2 Insulation Coordination In selecting the rated voltage, the corresponding insulation levels specified in clause 4.2 and table 1 of UL 347 should also be taken into
42、 account. The values in Table 1 apply to both indoor and outdoor equipment. 2.2.3 Rated Frequency Rated frequencies are 50 or 60 Hz and the manufacturer should be consulted if a controller is to be used at any frequency other than rated frequency. 2.2.4 Rated Short-Time Withstand Current The rated s
43、hort-time withstand current is the highest prospective rms short-circuit current to which the controller may be connected. It establishes the breaking capacity of the controller, under the conditions of use and behavior prescribed in this standard in a circuit having a power-frequency recovery volta
44、ge corresponding to the rated voltage of the controller. NEMA ICS 3.1-2009 (R2014) Page 3 2009 National Electrical Manufacturers Association The breaking capacity of a controller is largely determined by that of the medium-voltage fuse and shall be equal to or greater than the maximum expected fault
45、 current level of the point in the distribution system at which the controller is to be located. When forming an equipment assembly incorporating both circuit-breakers and controllers, the breaking capacity of the complete assembly should have one value, namely that of the lowest rated circuit. This
46、 rating then forms the basis for type testing of the short-circuit withstand capability of the main circuit conductors of the combination, i.e., the busbars and connections upstream of the medium-voltage fuse. 2.2.5 Rated Continuous (Thermal) Current The rated continuous (thermal) current of a contr
47、oller is assigned by the controller manufacturer on the basis of information gained from temperature-rise tests and will depend on the type and ratings of the contactor and the fuses. The thermal capability of the controller may have to be reduced where the ambient temperature in service exceeds the
48、 prescribed ambient temperature. NOTEThe rated continuous (thermal) current of a controller is generally less than, but should not be in excess of, the rated continuous current of the fuses as assigned by the fuse manufacturer. 2.2.6 Local Atmospheric and Climatic Conditions The equipment specificat
49、ion should state whether the equipment is to be of indoor or outdoor type. For outdoor installation, it is assumed that the equipment will be mounted in a suitable enclosure. Inside the enclosure, normal indoor conditions are considered to prevail. If necessary, appropriate measures shall be taken, such as air conditioning, so that common indoor components may be used. 2.2.7 Use at High Altitudes The normal service conditions specified in clause 2.1 of UL 347 provide for controllers intended for use at altitudes not exceeding 1,000 m (3,300 ft). Installation at altit
