NEMA PE 1-2012 Uninterruptible Power Systems (UPS) - Specification and Performance Verification.pdf

1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA PE 1-2012Uninterruptible PowerSystems (UPS) Specification andPerformance VerificationNEMA Standards Publication PE 1-2012 Uninterruptible Power Systems (UPS) Specification and Performance Verification Published by: National

2、Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, Virginia 22209 www.nema.org 2012 National Electrical Manufacturers Association. All rights, including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Prot

3、ection of Literary and Artistic Works, and the International and Pan American copyright conventions. 2012 National Electrical Manufacturers Association NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the development an

4、d 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. NEMA standards and guideline publications, of which the document contained herein is one, are developed

5、 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 development o

6、f 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, property or ot

7、her 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 accuracy or comple

8、teness 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 manufacturers or sellers products or services by virtue

9、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 this document

10、 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 other sources,

11、 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 installations for safety o

12、r health purposes. Any certification or other statement of compliance with any health- or safety-related information in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement. NEMA PE 1-2012 Page i 2012 National Electrical Manufact

13、urers Association Foreword This standards publication is a NEMA Adoptive Standard based on IEC 62040-3, Uninterruptible power systems (UPS) Part 3: Method of specifying the performance and test requirements. The current edition of IEC 62040-3 is adopted in its entirety with certain differences descr

14、ibed in the Amendments clause. As these differences could, in the future, be a contribution to a revision of IEC 62040-3 or a related IEC standard, this publication has been prepared in accordance with ISO/IEC Directives Part 2, Rules for the structure and drafting of International Standards. The pu

15、rpose of this publication is to provide guidance to manufacturers and users on specifying and verifying the performance of Uninterruptible Power Systems. This publication covers both installation and manufacturing criteria obtained from manufacturers and users. This publication represents the techni

16、cal judgment of the NEMA Power Electronics Section with respect to the performance and construction of Uninterruptible Power Systems. This judgment is based on sound engineering principles, research tests, manufacturers records, and field experience. PE 1-2012 revises the content of PE 1-2003. As fu

17、ture major revisions to this publication are proposed, appropriate individuals and organizations will be consulted. Proposed or recommended revisions should be submitted to: Vice President, Technical Services National Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, Vi

18、rginia 22209 At the time PE 1-2012 was approved, the NEMA Power Electronics Section consisted of the following member companies: Ametek Solidstate Controls APC by Schneider Electric Eaton Corporation Emerson Electric Co. GE Transportation Minarik Drives National Semiconductor Corporation ONYX Power

19、Inc. S b) depth of discharge; c) rate of discharge; d) ripple current; e) float voltage; f) temperature differential between cells; g) non-operating storage temperature; h) number of discharge cycles; i) rate of charge; j) temperature of the battery; k) overcharge. 2.5.5 Optimum Battery Life The man

20、ufacturers specifications should be carefully followed. Incorrect charging or discharging can destroy a battery very quickly (possibly within hours or days). Many cycles of excessive discharge can drastically reduce a batterys expected life. 2.5.6 Valve-regulated Batteries Sometimes valve-regulated

21、(sealed) batteries are referred to as maintenance-free batteries, incorporating oxygen recombination systems, absorbed electrolyte, or gelled electrolyte technologies. These batteries require routine maintenance, as recommended in 2.5.7, if rated performance is to be achieved. A maintenance-free bat

22、tery is one in which routine addition of water is not necessary. These batteries are designed to vent when their internal pressure becomes sufficiently high. Excessive overcharging, which results in venting, will eventually dry out the battery and shorten its useful life. 2.5.7 Routine Maintenance R

23、outine maintenance includes inspection of cables; connector and termination tightness; and terminal cleanliness. It might be necessary to periodically disassemble the cable connections from the battery, clean the terminals of corrosion, and reconnect the cables. Extreme care is urged when performing

24、 this operation as high voltages could be present. In every case, the manufacturers instructions should be followed. Battery maintenance should be performed only by qualified personnel. Battery maintenance information can be supplied by the battery manufacturer. Battery systems should be designed to

25、 allow for routine maintenance. 2.5.8 Battery Charging/Discharging Batteries shall be charged in accordance with specifications provided by the manufacturer. Recharging a battery at too high a rate can reduce battery life. The charging system in a UPS shall provide the necessary charging rate and co

26、ntrol the maximum charging voltages. The discharge shall be inhibited when the battery has reached its minimum allowable terminal voltage. Consult the UPS supplier before changing to another size or type of battery. Excessive battery equalizing and excessive equalizing voltage can decrease battery l

27、ife. Battery equalizing shall be done only as recommended by the battery manufacturer. 2.5.9 Battery Replacement When battery replacement is required, it shall not be undertaken without consulting the UPS manufacturers recommendations. Batteries of different types and capacities shall not be mixed u

28、nless authorized by the UPS manufacturer. NEMA PE 1-2012 Page 3 2012 National Electrical Manufacturers Association 2.5.10 Battery Terminal Maintenance Terminals should be kept clean and free of chemical deposits that might form on the interface between the battery terminal and the battery connector.

29、 Nuts and other hardware should be tightened only to the torque level prescribed by the manufacturer. Loose connections and/or excessive tightening can cause premature failure of the battery. Prior to assembly of post connections, all surfaces should be cleaned in accordance with the battery manufac

30、turers directions and surfaces coated with a corrosion-inhibiting material that will not change state under heating or other conditions that might form an insulating barrier. All post-to-post and terminal connections should be tested for proper resistance after all terminal connections are completed

31、 and prior to use of the battery. When working on electrical connections to a battery, insulated tools should be used. 2.5.11 Special Safety Handling of Batteries Batteries should be handled with extreme care or they can cause severe injury. Spilled electrolyte can destroy clothing, burn skin, or ca

32、use blindness. Batteries should be serviced only by a qualified technician. CAUTIONALWAYS WEAR GOGGLES AND RUBBER GLOVES WHEN WORKING WITH BATTERIES. Always wear eye protection, and never smoke when in the vicinity of vented, lead-acid batteries. The gases vented are hydrogen and oxygen, a potential

33、ly explosive mixture. If electrolyte gets into the eyes, flush with copious amounts of water and seek medical help immediately. Batteries should be used and stored in an upright position unless they have been designed for all-attitude use. 2.5.12 Battery Storage Batteries normally self-discharge if

34、left unattended for a long period of time. Lead-acid batteries should be stored in a charged condition, otherwise sulfation of the plates occurs, which is often an irreversible failure of the batteries. The suggested storage temperature range is 0-25C, or in accordance with the manufacturers recomme

35、ndations. When lead-acid batteries are to be stored for long periods of time, it is advisable to keep them on a very low rate of trickle charge, in accordance with the battery manufacturers recommendations. When such trickle charging is impractical, the batteries may be charged periodically. 2.5.13

36、Battery Operation Monitoring A battery monitoring system may be implemented for each bank of batteries in order to obtain a history of the battery systems operation and to assist in battery evaluation. 2.6 UPS EFFICIENCY ALLOWANCES The following paragraph shall replace the first paragraph in Annex I

37、.4 of the current edition of IEC 62040-3: Certain features, when added to the basic UPS configuration, permit allowances to be deducted from the UPS efficiency specified in Tables I.1 to I.6. The allowance shall apply only when the UPS, as a result of providing the corresponding feature, facilitates

38、 conditions that could otherwise not be supported. Allowances are limited to active transformers in the AC power path and one NEMA PE 1-2012 Page 4 2012 National Electrical Manufacturers Association filter per AC power path. The allowances in Table I.7, when applied to an auto transformer, shall be

39、50% of the equivalent isolation transformer value. Examples of allowance calculation are provided in clause I.5. 2.7 REQUIREMENTS FOR UPS USED IN POWER GENERATING STATIONS See ANSI/IEEE 944, IEEE Recommended Practice for the Application and Testing of Uninterruptible Power Supplies for Power Generat

40、ing Stations, for requirements concerning UPS intended to be installed in power generating stations. NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION 1300 NORTH 17TH STREET, SUITE 900 ROSSLYN. VA 22209www.NEMA.orgTO ORDER ADDITIONAL NEMA STANDARDS VISITWWW.GLOBAL.IHS.COM OR CALL 1-800-854-7179/1-303-397-79565612_0514TB