NEMA TR 1--``,,,`,,,,````````,,,,```,``,-`-`,,`,,`,`,,`--- COPYRIGHT 2003; National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100, User=, 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584. ~~ ~ S T D * N E M A T R 1-ENGL 1993 6470247 0524462 267 COPYRIGHT 2003; National Electrical Manufacturers Association --``,,,`,,,,````````,,,,```,``,-`-`,,`,,`,`,,`--- NEMA Standards Publication No. TR 1-1993 (R2000) Transformers, Regulators and Reactors Published by: National Electrical Manufacturers Association 1300 North 17th Street, Suite 1847 Rosslyn, VA 22209 O Copyright 2000 by the National Electrical Manufacturers Association. 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 Internationaland Pan American Copyright Conventions. Document provided by IHS Licensee=Aramco HQ/9980755100, User=, 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584. COPYRIGHT 2003.```.`--- NEMA Standards Publication No..`..````````... reserved under the Universal Copyright Convention. . 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584... All rights including translation into other languages...`. and the International and Pan American Copyright Conventions.. Suite 1847 Rosslyn. User=. VA 22209 O Copyright 2000 by the National Electrical Manufacturers Association.-`-`. Regulators and Reactors Published by: National Electrical Manufacturers Association 1300 North 17th Street. National Electrical Manufacturers Association --``. TR 1-1993 (R2000) Transformers.`..``.. the Berne Convention for the Protection of Literary and Artistic Works. Document provided by IHS Licensee=Aramco HQ/9980755100.`. . . . .. . . . . .. .... . .... . . . ... ... . .. ..`. .. . . . ... . 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584. . . . . . rnfre et 2 1 ReactorTestReport . . .. . .. . .. .. . . . . . . . . .. . .. . . . . .. . . .. . .. .. .. . . .. . . . .. . . . . ... . . . . . .. .. . . . . .. . . . . . . .. . .. . . . . . . . . . . . . . . . . . . ..... .. . . . . . . . . . . . . .. . . . . . --``. . 23 CURRENT-LIMITLNGIUWCl'OW . . Audible Sound Levels .. .. . ... .. . .. .. . .TYpETRANSFORMERS . . . .````````. . .. . . . ... .... 20 T a s o m rImpulse Ts Report . . . . &wer F c o of Insulation of oil-immersed atr Transfomiers ..`... . . . . . . ... . . . . . .. . . . . . . . . .. .. .. ... ... . . .. . . . . . . . . .. . . . . ..... Forced.... . .. .. . .. . .. . ... . .. . . .. ... .. ... . . .. ... . . . . . . .. . . . . .. . . . . . . . . . . . . . . . . .. . . . ..```. . . . . . . . 9 DRY.. . .. . . .`. . . . .. . . .. . . . . . . . .. . .. . . . .. . . ... .. . .... RadioinfluenceWîageLevels . .. .. ... . . . 31 .. . User=.... . . 25 ARC FüRNACE TRANSFORMERS 27 S"TREACT0Rs . . . .. . . . .. .. . . . . .``. ... . . .~ . .. . . . . .. ..`. .. . .. . . . .. .. . . . . . . .. . . . . . . . . . .. . . 7 SECONDARY NFXWORK TRANSFORMERS . . . . ..... . . . . ... . . . . . . . . . . . . .. . . .. . .. 22 TRANSMISSION AND DISTRIBUTION VOLTAGE REGULATORS . . National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100. . . . . . . . . . ... .N E M A TR II-ENGL 1993 b470247 0521iLib4 03T TABLE OF CONTENTS PART O FWdWtageRatings ... . . . . .. . . . . ... . . . . . . .. . . . .. .. .... . .. .. ~ S T D .`--- COPYRIGHT 2003. ..... .. . . . . .. . . . .. .. .. * 1 1 1 . . . ... . . . . .. . 1 7 Test Code for M a u e e t of Radio Influence esrmn WtageLevels . . . .... . . .. . .. .. .. . . .. . ... . . .. . . 29 uNDERGRouND-TypETHRFJE-PHASEDISTRIBuTIONTRANS~~. . . .. . . . . .. .. . . . . 13 TERMINOuXiY . . .-`-`.. . . . . . . . . . . .. . Air (FA) and Forced-Oil(FOA)Ratings . .. . .. .. . w R R NF R E s 5 DISTRIBUTION TRANSFOñMERS Design Test for Enclosure Security of padmounted ComparmientaiTransfomiers . . . .. . . .. . ... . 17 TransfamerTestReport .. . . . .. . . 15 TESTCODE . . . . . . . . . ... . . . . . . 2 2 2 2 PART 1 PART 2 PART 3 PART 4 PART 5 PART 6 PART 7 PART 8 PART 9 PART 10 PART 11 PAñT 12 m E T A s o M R . . . .. . .. . .. ... . . .. . . . . 11 UNIT SUBSTATION TRANSFORMERS .. .. performance GENERAL . ... . . .. C57. t a t codes.`--- FOREWORD The standards appearing in this publication have been developed by the Transformer Section and have been approved for publication by the National Electrical Manufacturers Association. if any. correlation and maintenance of national standards for transformers.regulators. without duplication.. They are used by the electrical industry to promote production economies and to assist users in the proper selection of transformers. . The NEMA StandardsPublication for Transformers. Document provided by IHS Licensee=Aramco HQ/9980755100. They have a maximum life of five years... for consideration by ANSI. Proposed or recommended revisions should be submitted to: Vice President. on which there is a difference of opinion within Committce C57. In addition it includes certain NEMA Standard test methods. in the dcvelopment. U e s sr should secure latest editions. b.W. and reactors that are not American National Standards... on Transformers. the American National Standards.```.`. d. N.C.Regulators and Reactors references these and other American Nationai Standardsapplying to transformers. National Electrical Manufacturers Association --``. of liquid-immersed transformers.Regulators and Reactors.`. These arc NEMA Standards. D... American National Standards adopted by reference and applicable exceptionsapproved by NEMA.``. User=. Washington.-`-`. NEMA OfficialStandards Proposals. NEMA StandardsPublicationsare subject to pcriodic rcview and Lake into consideration user input. The Transformer Section is working actively with the American National Standards Committee. and is intended to supplement.. These are officiai drafts of proposed standards developed within NEMA or in cooperation with other interested organizations.`. This Committee operates under the procedures of the American National Standards Institute (ANSI). properties. c.````````. 20037-1526 SCOPE This publication provida a list of all ANSI C57 Standards that have been approved by NEMA.`. The NEMA Standards Publication for Transformers.COPYRIGHT 2003. 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584. or rescinded Manufacturing Standards. Thc NEMA version will be included in the NEMA Smdards Publication until such timc as the diffcrences bctween ANSI and NEMA are resolved... Engineering Department National Electrical Manufacturers Association 2101 L Street. Regulators and Reactors contains provision for the following: a. etc.. These are NEMA Standards which are primarily of interest to the manufacturersof transformersand which are not yet included in an American National Standard. during which time they may be approved as American National Standards or adopted as NEMA Standards.. Standards Which Are Controversial. s It i the policy of the NEMA Transfomer Section to remove material from the NEMA Standards Publication as it is adopted and published in the American National Standard C57 series. They are being revised constantly to meet changing economic conditionsand technical progress. including supplements Terminal Markings and Connections for Distribution and Power Transformers Test Code for Liquid-immersed Distribution. 5.12.`.12.1993 ANSI/IEEE C57.12.-`-`.E N G L I1993 W b470247 05244bb 902 TR 1-1993 Page 1 PART O GENERAL The following American National Standards have bccn approvcd as NEMA Standardsand should be inserted in this Part o ANSI/IEEE C57.``.`.417 AVA single-phase 750/862-60.1992 ANSI/IEEE C57.`. o 0. 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584..19.00-1992 ANSIDEEE C57.0oO/80.01 PREFERRED VOLTAGE RATINGS Preferred system voltages and corresponding transformer voltage ratings are given in the Amcrican National Standard for Electric Power Systems and Equipment--VoltageRatings (60 H ) C84.00-1988 ANSI/IEEE C57..12. --``.`.. .00-1988.11 of American National Standard ANSI/IEEE C57. User=.ooo/I 00.70-1993 ANSI/IEEE C57.000 volts and below. 0... Power & Regulating Transformers and Guidefor Short-circuit Testing of Distrihuiion & Power Transformers General Requirements and Test Procedure for Outdoor Appratlcs Bushings Standard Performance Characteristics di Dimensions for Outdoor Apparatus Bushings Guidefor hading Mineral-oil-immersed Power Transformers up to and including 100 MVA with 55C or 65C Average Winding Rise TheNEMA StandardsTR 1-0..10-1988 ANSI (257..S T D * N E M A T R 1 . National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100. the relationship bctween self-cooled ratings and forced-aircooled or forced-oil-coolcd ratings shall be in accordance with Tablc 0-1. ommended that these ratings be used as a guide in the purchase and operation of transformers.. 8331958-8333/10.09on the followingpages(secPan0Pages 1-9)alsoapplygenerally t transformers..1992 General Requirements for Liquid-Immersed Distribution.```.92.12.19.````````.01 throughTR 1-0.OOO kVA three phase.01-1989 ANSI C57. Table 0-1 FORCED-AIR AND FORCED-OIL RATINGS RELATIONSHIPS Self-mdcd Ratings* (kVA) CIPS Single Phaw Threc Phaw Pcrccnt of Scif-Cot>ledRatings With Auxiliary Coding First Stage Second Stage ONFA OMA OAIFA 501-2499 2500-9999 loo00 and above loo00 and above loo00 and above 1oo00 and above 501-2499 2500-11999 12000andabove 12000andabove 12000and abovc 12000 and above 115 125 133-1f3 133-1/3 133-1/3 133-3/3 --- __ 0W-A ONFAFOA OWOAFOA 166-213 166-213 166-213 *In the case of multi-winding transfomers or auiotransfomers.01.1-1989.`--- COPYRIGHT 2003...90. Power and Regulating Transfarmers General Requirements for Dry Type Power and Distribution Transformers Requirements for Transformers 230.02 FORCED-AIR (FA) AND FORCED-OIL (FOA) RATINGS Undcr Ihc conditions of par.12. the raitngs given are the quivalcn~ iwo-winding ratings. It is recz. 01. railway. for systems rated 69 kV and less.`. 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584. a factory powcr-factor tcst can bc made. prcfcrably at or close to 20°C. (2) sealing..grounding.mobile and mobile unit substation transformers are not covered by the tablcs..```. furnace.`.05 AUDIBLE SOUND LEVELS Transîormers shall be so designed that the average sound level will not excecd the values given in Tables 0-2 through O 4 whcn mcasurcd at the factory in accordance with the conditions outlined in ANSI/IEEE (257. National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100.S T D . . The test voltage shall be the line-toneutral voltage corresponding to 110 percent excitation of the transformer. Thc tablcs do not apply during the time that power switchcsarcopcrating in load-tap-changingtransformers and in uansformcrs with intcgral powcr switchcs.03 RADIO INFLUENCE VOLTAGE LEVELS The following values apply to liquid-filled transformers. Sound powcr may bc calculated from sound pressure..04 POWER FACTOR OF INSULATION OF OIL-IMMERSED TRANSFORMERS While the real significance which can be attached to the power factor of oil-immersed transformers is still a matter of opinion.. Rectificr.`. 0. experience has shown that power factor is helpful in assessing the probable conditions of the insulation when good judgement is used.-`-`.N E M A TR L-ENGL 1993 g 6470247 0524467 849 9 TR 1-1993 Page 2 PERFORMANCE 0. When required. and this measurement will bc of valuc for comparison with field power-factor measurcmcnts to asscss the probablc condition of thc insulation. it is the comparative values which are guides for the successful solution for these problems rather than an absolute value of powcr factor.`--- COPYRIGHT 2003. They do not apply to load tap changing during switching or to operation of auxiliary relays and control switches.12. Sound pressure levels are established and published in this documcnt. The generally accepted factory tests for proving the insulation level are the prescribed low-frequency tests and impulse tests given in the Amcncan National Standard C57... b. --``. The proper interpretation of power factor of oil-immersed transformers is being given carcful attention by manufacturers in connection with the problems of (1) selecting insulating materials.90-1993. thc mcasurcmcnt should be made with thc insulation at room tcmpcraturc.12..`. However. shall not exceed 100 microvolts when measurcd in accordance with Section 7.90-1993. User=.1 DistributionTransformers Radio influence voltage levels for distribution transformers. 0..12. Whcn a factory powcr-factor mcasurementof a transformer is rcquucd.03. It is not feasible to establish standard powcr-factor values for oil-immersed transformers because: a. using the method described in C57. Experiencehas dcfinitely proved that little or no relation exists between power factor and the ability of the transformer to withstand the prescribed dielectric tests.````````.90-1993..``. Thc guarantccd sound Icvcls should continue to be per Tablcs 0-2 through 0-4 until such time as enough data on measured noisc powcr Icvcls bccomes available. This will be the coil voltage for wye connections and 1/3 times the coil voltrigc for dclta connections. 0. Expcrience has dcfinitely proved that the variation in power factor with temperature is substantial and erratic so that no single correction curve will fit all cascs.. and (3) processing the Uansformers.. .. . . .. .. . . .. User=.. .. . . .. . . .. . .. . ." '. . . .. . .. ... .. . . ..... . .````````. . ... .. . . . . .. . .. . . ... . . : :. . : . piii i i i i : i i i i i : i ... . . .8" : : : p 8. .. : :.. : . .```. .`.c [ [ i i : . .. . ... . . . . . .. .. . ..: . ..`--- .. . . . .. . . .. . . .. : . . . .. . . . .. .. . .. : . . . . . . ... . . . . .. . . g i q g &g[. .. . . . . .-. . .. . ..ipj w . . : : : i : Iypi $@pl "i[: . . . . . . . . . . .`.`. . . . ... . ..NEMA 'rR 1-ENGL 1943 b 4 7 0 2 4 7 0524468 7 8 5 9 .. . . . 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584.. .. ... . ... .. . . . .. : . . ... i i c g i p&p[ i : : i ! fiiii i : j j i i : i .. . .. : :.. National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100. .. . . ... . . . ... .. . . . .. .. . . .. : . . . . . .. . .1 i i : i . : r ii[[[ .sgiq @iii $ g -N m P i i j j . . . COPYRIGHT 2003. . . . .. . ipp pggi i ii ai . . . . . . . ..#... . . . . . . .. .. . . .. . . .. ... . .. .. i i i i i .. .``. < . . . . . . . . . . . . .. . : . . . ....`. . . . : . . . . .. .... . . .. . .-`-`. .. . . ... . . . . .. . .. .. i i $ L : I !i@ M O $!i[! gintfj ta@[ [i!!! i i i j i i ! i i i --``.. .. .. . . . . . . . TR 1-1993 Page 4 S T D .. Dcclbds VcntUittcd Forced Air C d c d “. 1)ccihcis Sdf-CtIOlLd Self-c<*~IL! SCYIL! Vcntilatcd Fipivdcnt Two-win d i g n kVA Levd...-`-`...`. ....t (r-5 3 51-150 151-300 301-500 501-700 701-1000 1001-1500 1501-2000 2001-3000 30014000 4001-5000 5001-6OOû 6001-7500 * Class AA rating 50 55 58 60 62 64 65 66 68 70 71 72 73 so 55 57 59 . National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100. Dccihcls 0-50 51-100 101-300 30 1-500 750 lo00 1500 2000 48 51 55 56 57 58 60 61 Table 0-4 AUDIBLE SOUND LEVELS FOR DRY-TYPE TRANSFORMERS 15000-VOLT NOMINAL SYSTEM VOLTAGE AND BELOW Avcragc Sound Equivaicnt Two-Winding kVA Avcragc Sound I. 3-300 30 1-500 50 1-833 834-1 167 1 168-1 667 1668-2000 .. . 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584.``.cvcl.`.`....`.. .````````..```.... User=. 67 67 61 63 6-2 65 Mi 68 67 67 68 69 71 73 74 75 76 69 70 71 2M1-3333 3334-5000 500 14667 6668-8333 8334-1 ooo0 *+Doesnot apply LO sealcd-iypc tranzformcrs tClass FA and AFA ratings --``...N E M A TR II-EMGL li993 6470247 0524469 611 Table 0-3 AUDIBLE SOUND LEVELS FOR LIQUID-IMMERSED DISTRIBUTION TRANSFORMERS AND NETWORK TRANSFORMERS Equivalent Two-wind ing kVA Avcragc Sound b v e l .`--- COPYRIGHT 2003. Part 1 General b...`. Part 12 Underground-Type Three-Phase Disuibution Transformer COPYRIGHT 2003.`. . Thc following oihcr pans of this NEMA Publication No.12. part7 Test Code d. National Electrical Manufacturers Association --``.. The ANSUIEEE Standard (37. User=... Part6 Terminology c.92-1992. 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584..`--- Document provided by IHS Licensee=Aramco HQ/9980755100.. has been approved by "íA and should be inserted in this Part 1.`.``..10-1988 has been approved as a NEMA Standard for power transformers and should be inserted in this Part 1.```.````````...N E M A T R L-ENGL 1 m 3 m u70247 os24470 3 3 3 m TR 1-1993 Page 5 Part 1 POWER TRANSFORMERS The American National Standard (257..`.-`-`. TR 1 shall also apply: a.S T D . 91-1992 The following parts of this NEMA Publication No. 167 kVA and Smaller Requiremenisfor Pad-Mounted. Compartmental-Type. Low Voltage. 34500 Grd Y119920 Volts and Below.21-1980 ANSI C57. Compartmental-Type. (High-Voltage. Three-phase Distribution Transformers with High-Voltage Bushings 2. Compartmental-Type. Single-phase Distribution Transformers with Separable insulated High-Voltage Connectors: iligh-Voltage 34500 Grd Yi19920 Volts and below: Low-Voliage 240i120 Volts. Low Voltage..Self-cooled.34500 Grd YI19920 Volts and Below.Self-Cooled.12.12. Low-Voltage.. National Electrical Manufacturers Association Document provided HQ/9980755100.500 Grd Y119920 Volts and Below.12. 167 kVA and Smaller Pad-Mounted Compartmental-Type Self-Cooled.N E M A TR 3-ENGL 1993 Sai 6470247 0524473 27T TR 1-1993 Page 7 Part 2 DISTRIBUTION TRANSFORMERS The following American National Standards have been approved as NEMA Standards for distribution transformers at and should be inserted in this P r 2: ANSI C57..`.`.`. 480 Volls and Below Requirements for Underground-Type Se(f-Cooled Single-phase Distribution Transformers.01 DESIGN TEST FOR ENCLOSURE SECURITY OF PADMOUNTED COMPARTMENTAL TRANSFORMERS This standard provides a means forevaluatinglhc security of cnclosurcs ror wansíormcrs conforming to h e following American National Standards.12. 2401120 Volts.Self-Cooled.```. TR 1 shall apply for disuibulion transformers: Part0 General Pr 6 Terminology at Part? TestCode Part 12 Underground-type Three-PhascDisuibution Transformers 2.12. Low-Voltage 2401120. 167 kVA and Smaller Requirementsfor Pad-Mounted.22-1989 ANSI C57. Single-Phase Distribution Transformers with íligh-Voltage Bushings. Single-phase Distribution Transformerswith iiigh-Voltage Bushings.500 kVA and Smaller) Guidefor Loading Mineral Oil-immersed Overhead-typeDistribuion Transformers with SSC or 6SC Average Winding Rise ANSI C57. ANS1 C57.500 kVA and Smaller.1992 ANSI C57.-`-`.12. High-Voltage.Three-phase Distribution Transformers for use with Separable i-ligh-Voltage Connectors (High-Voltage 34500 Grd YI19920 Volts and Below: 2. Three-phase Distribution Transformers with High-Voltage Bushings 2500 AVA and smaller. 34. 500 kVA and Smaller: High Voltage.````````.`.Self Cooled...`--- COPYRIGHT 2003. Low-Voltage... .26-1987 ANSI (37. Low Voltage 480 Volts and Below Requirements for Pad-Mounted.25. 34500 Volts and Below. High-Voltage. 06/11/2003 Previous page is blank.20-1988 Requirements for Overhead-Type Distribution Transformers.1990 ANSI C57. Compartmental-Type.22-1989 ANSI C57.25-1990 Requirements for Pad-Mounted.12. Compartmental-Type.21-1980 ANSI C57.23.with Separable Insulated Iligh-Voltage Connectors.12.. 79701138OOY Volts and Below Requirementsfor Pad-Mounted.. 167 kVA andSmaller) Requiremenisfor Pad-Mounted. High-Voltage 24940 Grd YI14400 Volts and Below.Self-cooled.500 Grd YI19920 Volts and Below. User=. 167 kVA and Smaller --``. Compartmental-Type.. I-ligh-Voltage.240/120 Vola.12. Single-phase Distribution Transfarmers with Separable Insulated Iligh-Voltage Connectors: High-Voltage 34500 Grd Yi19920 Volts and below: Low-Voltage 240i120 Volts.S T D .34. by IHS Licensee=Aramcothis message: please call the Document 01:58:16 MDT Questions or comments about Policy Management Group at 1-800-451-1584.``.. Self-cooled. 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584. National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100. Three-phase Distribution Transformers for use with Separable High-Voltage Connectors (I-ligh-Voltage34500 (3rd Yi19920 Vohs and Below: 2500 kVA and Smaller) COPYRIGHT 2003..`--- .`.... --``.26-1987 Pad-Mounted Compartmental-TypeSelf-Cooled..TR 1-1993 Page 8 ANSI (257.`.-`-`.``.... User=..```.12.`..`..````````. . The following other parts of this NEMA Publication No.. Part0 General b. User=.S T D a N E f l A TR 1-ENGL 1993 6470247 052Y473 0 4 2 TR 1-1993 Page 9 Pari 3 SECONDARY NETWORK TRANSFORMERS The American National Standard Requirements for Secondary Network Transíormers.12.. National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100.. (257..`...`--- COPYRIGHT 2003. Part7 TcstCode --``.40-1990. 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584.```.`.-`-`... .``.````````.5. Subway and Vault T p s (Liquid Immersed).`.4 and 1 1 5 2 on finishes) have been approved as NEMA Standards for secondary network transformers and should be inserted in this Part 3..`.. TR 1 shall also apply for secondary network transfomcrs: a. (with the ye exception of paragiaphs 5. Part6 Terminology c. Three-Phase.12. Three-phase With Iligh-Voltage 601-34500 Volts.12. 1 to 500 RVA. With iligh-Voltage 601-34500 Volts.. With High-Voltage 601-34500 Volts..```. Low-Voltage 120-600 Volts Requirementsfor Ventilated Dry-Type Power Transformers...501 kVA and Larger.`--- .12.52-1989 ANSIDEEE (257. ~ --``..94-1982 A N S I D E (37. Low-Voltage 208Yl120-4160 Volts Recommended Practicesfor installation.``. SO1 kVA and Larger.-`-`.. 06/11/2003 01:58:16 MDT Policy Management Group at 1-800-451-1584.Application.96-1989 General Requirements for Dry-type Distribution and Power Triansformers Test Code for Dry-Type Distribution and Power Trandormers Requirementsfor Ventilated Dry-Type Distribution Transformers.5 1-1989 ANSI 07. Three-phase. Appendix to C57.STD-NEMA TR 1-ENGL 1793 E 6 4 7 0 2 4 7 052YY74 T 8 9 9 TR 1-1993 Page 11 Part 4 DRY-TY PE TRANSFORMERS The following American National Standards have bccn approvcd as NEMA Standards for dry-type transformers and should be inserted in this Part 4: ANSIDEEE (37.50-1989 ANSI (257..````````..`. Previous page Questions orLicensee=Aramcothis message: please call the Document is by IHS comments about HQ/9980755100. and 15 to SOO kVA. Single-phase.12 Standark COPYRIGHT 2003.12.01 -1989 ANSIPEEE C57..`.`. Low-Voltage 208YIl20-4160 Volts Requirements for Sealed Dry-Typ Power Transformers. User=..12. National Electrical Manufacturers Association Document provided blank.91-1979 ANSI C57. Operaion and Maintenance of Dry-Type General Purpose Distribution and Power Transformers Guidefor Loading Dry-Type Transformers.`.. .`...``.````````.`. Part6 Terminology c.. TR 1 shall also apply for unit substation transformers.-`-`. National Electrical Manufacturers Association Previous page is blank. ~~ .`.S T D . 06/11/2003 Document provided 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584. User=... a Part0 General b...N E M A TR 1-ENGL 1993 6470247 0524475 915 TR 1-1993 Page 13 Part 5 UNIT SUBSTATION TRANSFORMERS The following other parts of this NEMA Publication No...`. Part7 TestCode --``.```. by IHS Licensee=Aramco HQ/9980755100..`--- COPYRIGHT 2003. .`--- . 06/11/2003 --``... User=. has been approved as a NEMA Standard for terminology and should be inserted in this Part 6.80-1992. Policy Management Group at 1-800-451-1584.`..`.```.`.````````.. Document provided by IHS Licensee=Aramco HQ/9980755100.. COPYRIGHT 2003.TR 1-1993 Page 15 Part 6 TERMINOLOGY The ANSIEEE Standard C57...12...-`-`.. National Electrical Manufacturers Association Previous01:58:16 MDT Questions or comments about this message: please call the Document page is blank.``.`. This NEMA standard. shunt (iron core) reactors. 107-1%4(R-1971. P r 7. may be any suitable impcdance and need not be terminated in its characteristic impedance. Measuring. see par. current-limiting reactors and some arrangements of regulating transformers and autotransformers. The ratio of thc vollage mcasured with the radio noise meter at the terminal to the voltage measured with the radio noise metcr at L e normal location in the circuit h COPYRIGHT 2003. shall be connectcd to the tank and ground..01 TEST CODE FOR MEASUREMENT OF RADIO INFLUENCE VOLTAGE LEVELS a. at 7. User=. or that of a pulse signal gencrator at approximatcly 100 microvolts.`.be induced from a winding other than that being tested (see Fig. In order that the results be comparable. For an alternate method. s e tp down or interconnected service. It may.R-1992).C a s A-2 Appmtus ls The test voltage shall be applied to the winding under test. Apparatus The apparatus to be tested under this code can be divided into two general classes as follows: Class 1 Potential-type transformer apparatus.. This device shall constitute all circuit elements from the capacitance u p of the bushing to the radio noise meter. --``. provided its relationship to the first radio noise mctcr has been established).with the same radio noise meter.. the ground tcrminal if onc is available.``.`. ls such as series transformers. 7 4 and 7-5. and some arrangements of regulating transformers and autotransformers. C a s 2 Series-type transformer apparatus. the voltage appcaringin the test circuit at the location where the radio noise meter will be connectcd during the radio influencevoitage measurement on the transformer (a second radio noise meter shall be pcrmitted to be used instcad. .. See Fig. shall also apply for at hansformer tests. such as transformersfor step-up.. the circuit arrangements and constants must be as shown in Fig.. E.```. Windings with one end solidly grounded obviously will receive no test on the grounded end. 7-1or 7-2.98-1992. The ANSi/iEEE Standard C57. 7-2).. Equipment The equipment and general method used in determining the radio influence voltage shall be in accordance with the NEMA StandardsPublication Methods of Measurement of Radio Influence Voltage (RIV)of High-voltageApparatus. Calibration for circuits using bushing capacitance tap The calibration ratio will be determined by: Applying to the terminal under test the output of a sine-wave signal generator at approximately lo0 microvoltsand at the measuring frcquency. The test on a reduced-voltage ncutral terminal shall correspond to the insulation class of the neutral.`. National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100.. Policy 1-800-451-1584.-`-`. it shall be established that this calibration ratio rcmains valid ovcr the radio influence voltage range of interest. an element of the device. c. however. b.````````.`.`--- One terminal of each winding not under test. with all tcrminais of the winding under test tied together (see Fig.has been approved as a NEMA Standard for transformer tests and should be inserted in this Pr 7 at . Use of bushing capacitance tap If radio influence voltage is measured at the capacitancetap of the bushing.S T D = N E f l A TR 1-ENGL 1993 m 6470247 0524477 798 TR 1-1993 Page 17 Part 7 TEST CODE The American National Standard ANSI/IEEE C57. 1976.. a suitabledevice shall be used which can be tuned with the bushing tap to ground capacitance at the measuring frequency. Use of Bushing Capacitance Tap. Connectionsfor testing. Connections for testing-llass A-1 Apparatus The test voltage shall preferably be impressed across the winding under test (see Fig.The winding shall be tested first with one end grounded and thcn with the other end grounded..90-1987. should be inserted in this P r 7. Measuring the voltage on the terminal with the radio noise meter connected directly to the terminal.12. 7-3). 7-1). The coaxial cable. The purpose of the device is to minimize the dividing effect of Lhe bushing capacitanceand to convey the radio influcncc voltage Lo the radio noise mctcr with minimum attcnuation.. 06/11/2003 01:58:16 MDT Questions or Previous page isManagement Group atcomments about this message: please call the Document blank. Located as to provide the outside clearances recorn rncndcd.-`-`.```..`..````````. I b 4 7 0 2 4 7 0524478 b 2 4 I h.`. --``. Testcd at approximately the same temperaturc as the room in which the tests are made 2.``.. Test voltage The test voltage shall be determined from the preferred nominal system voltage in accordance with 0..`--- . 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584.... National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100.`. COPYRIGHT 2003.04 in Part O.S T D = N E M A TR 1-ENGL 1993 TR 1-1993 Page 18 which has been selected for the corona test on the transformer will be applied as a correction factor to the radio influencevoltage reading obtained during the corona test to determine the actual radio influence voltage at the terminal of the winding under test. g.. Precautions in making tests The following precautions should be observed in mcasuring the radio influence voltage..`. The apparatus should be: 1... User=. except that Lhe test voltage shall not exceed 110 percent of the rated volizige of the winding on the highest tap connection. 107-1964 (R 1971.`..`--- + Fig. 7-5 A -Transformer under test B -Testing transformer Cl High-voltage bushi ng capacitance C1.````````.``.`.`.....-`-`.S T D a N E M A TR 1-ENGL I1993 I b470247 0524479 560 I TR 1-1993 Page 19 Z - I - - Fig.. National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100. 7-4 I I CABLE A n Fig. -Variable inductance -Resistor ? M -Radio noise meter - COPYRIGHT 2003. --``.. 1976.. R 1992). User=...```.. 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584. 7-1 A -Transformer under test B -Testing transformer C -Coupling capacitor NM-Radio noise meter R -Terminating resistance Z -Radio frequency choke Valucs for radio circuit clcmcnu and detailcd connections shall coníorm IO ihc ATMA Standards Publication Mcihodr of Mearuremeni o Radio Injluence voltage @IV) Of Iiigh-Vdlagc f Apparatus. 7-3+ TEST CIRCUITS FOR RADIO INFLUENCE MEASUREMENTS USING THE BUSHING CAPACITANCE TAP: 1 Fig.High-voltage bushi ng capacitance tap CABLE-Shielded cable 2.`. . Signed Date Approved by Transformer Engineering ûept.. Losses and regulation are based on wattmeter measurements. Exciting Current Percent at 100% Voltaae No Load LOSS V V to Load Loss v to v to In Watts 100% Voltage 1 %Imo.`. 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584. and that each Transformer withstood the above insulation tests. For three-phase transformers the resistances given are lhe sum of the three phases in series. EXCITING CURRENT. . t Watts Loss and Impedance at 85’C Resistance in Ohms at 85°C Serial No.12. OS TEMPERATURE RISES are in degrees C corrected to instant shutdown. Authorized Engineering Information 11-20-1980... LOSSES AND IMPEDANCE-Based on normal rating unless otherwise stated.-`-`. Phase Hertz - Mfr.. Such temperature rise entries shall be OP separate lines in the Temperature Rise table of the Test Report Form.````````.02 TRANSFORMER TEST REPORT To facilitate safe and effective operation of transformers it is recommended that the following information be included in the test report: Manufacturer’s Name Date of Test Cooling Class Purchaser’s Order No. with windings connected and loaded as follows: Serial No Multi-winding transformer heat run connections for the determination of the maximum winding rises over ambient may not be the same as that for the maximum losses which produce the maximum fluid rise.``.90 current edition of the American National Standards Institute. kVA kVA Load LOSS I %Imp.TR 1-1993 Page 20 7.`.`--- DIELECTRIC TESTS-If Impulse Tests are required. --``. National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100. 7 I I I I APPLIED POTENTIAL TESTS Voltage applied between each winding and all other windings connected to core and ground.. Precautions should be taken to assure that the fluid temoerature rise and windina rises entered on a common line corresoond to the same test conditions.’s Ref...`. No. Insulating Fluid Volts (3) kVA Volts kVA ~ Volts kVA (2) RESISTANCE.. V V kVA Load L S i%lmP.```.`. I Voltage Rating of Winding Tesced I I Test Voltage Applied- l I Duration of Test in Seconds 1 I INDUCED POTENTIAL TESTS I hertz for cycles ==I times rated volîage across full winding kV from kV line terminal to ground I I hereby certify this is a true report based on factory tests made in accordance with the Transformer Test Code C57. see separate Transformer Impulse Test Report.. COPYRIGHT 2003.. .. User=. ```..NEMA T R 1-ENGL 1993 M 6470247 0524481 119 I TR 1-1993 Page 21 7..d Full Wave CW-C hopped Waue 'FW-Full Ware REMARKS: Signed Page of Date Pages Approved fransiwmei Engineering Dopt.`--- . COPYRIGHT 2003. User=.`. --``.``.'t Rderrnces Insulating Fluid Y-winding Volts *RFW-Roduc. National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100.STD.````````. 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584.`.`........03 TRANSFORMER IMPULSE TEST REPORT To faciiitate safe andeffective operation of transformers it is recommendedthat the foliowinginformatian be included inthetestreport: Manuiacturer's Name Purchaser Dare of Tes1 Type H-winding Phare Volts X-winding Purchaser's Order No. Cycles Volts Mtr.-`-`...`. Average Guarantee I TEMPERATURE RISE in degrees C corrected to instant of shutdown. unless otherwise stated. Serial No.. wattmeter measurements.``.04 REACTOR TEST REPORT To facilitate safeandeffectiveoperation of transformersit isrecommendedthat the following informationbe included inthetestreport: Manufacturer’s Name Purchaser Date of Tests Type Volts Drop Phase kVA Purchaser’s Order No. ...`.. User=. National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100..-`-`.`.. No.````````. LOSSES AND IMPEDANCE are based on normal rating.```. 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584. Cycles Mfr. I Amperes I Rise by Resistance I Guarantee Voltage Rating of Winding Applied Voltage at Normal Frequency Induced Voltage at High Frequency REMARKS: Signed Date Approved --``...`--- COPYRIGHT 2003. Insulating Fluid Amperes Losses are based on For connection in Volt Circuit RESISTANCES.TR 1-1993 Page 22 7....`.’s Ref.`. .``. Appendix to C57... has been a p proved as NEMA Standards for transmission and distribution voltage regulators and should be insened in this Pr 8. has been approved as NEMA Standard for Transmission and dismbution voltage regulators and should be inserted in this Pr 8. .````````.`...`. National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100.`--- COPYRIGHT 2003..15-1992. 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584.-`-`. User=.`..95-1992.STD-NEMA TR Ii-ENGL 3993 - 6470247 0524'463 T î L E TR 1-1993 Page 23 Part a TRANSMISSION AND DISTRIBUTIONVOLTAGE REGULATORS nie ANSUIEEE Standard C57.. at --``..15...`.```. at nie ANSVIEEE Stanard C57. ``.. Document provided by IHS Licensee=Aramco HQ/9980755100.-`-`...S T D ...`.`.```.... User=.`.`--- COPYRIGHT 2003. National Electrical Manufacturers Association Previous page is blank. 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584.N E M A TR 1-ENGL 1773 W b470247 0524484 728 TR 1-1993 Page 25 Part 9 CURRENT-LIMITING REACTORS [To Be Published] --``.... .`.````````. .```.STD.. Part7 TestCode .by IHS Licensee=Aramcothis message: please call the Document 01:58:16 MDT Questions or comments about Policy Management Group at 1-800-451-1584.`--- COPYRIGHT 2003. 06/11/2003 Previous page is blank.TR 1 shall also apply for arc furnace transfomws: a Parto General .NEMA TR II-ENGL II993 b 4 3 0 2 4 7 0524485 8 6 4 TR 1-1993 Page 27 Part 10 ARC FURNACE TRANSFORMERS The foUowing other parts of this NEMA Publication No...`. User=.`.`.. Part6 Terminology c. --``.....`.. b..````````. .-`-`.``. National Electrical Manufacturers Association Document provided HQ/9980755100. .`...21-1W1..`.`.````````... National Electrical Manufacturers Association Document provided HQ/9980755100..-`-`.``. been COPYRIGHT 2003. by IHS Licensee=Aramcothis message: please call the Document 01:58:16 MDT Questions or comments about Policy Management Group at 1-800-451-1584... 06/11/2003 Previous page is blank.`--- .has approved by NEMAand should beinserted in this Part 11.C57. User=.-~ STDmNEMA TR L-ENGL 1993 D b 4 7 0 2 4 7 0 5 2 4 4 8 b 7 T 0 = TR 1-1993 Page 29 Part 11 SHUNT REACTORS The American National Standard. --``..`..```. `..`.````````.. User=..--``.`.``. National Electrical Manufacturers Association Document provided by IHS Licensee=Aramco HQ/9980755100. 06/11/2003 01:58:16 MDT Questions or comments about this message: please call the Document Policy Management Group at 1-800-451-1584..`. ....-`-`...```..`--- COPYRIGHT 2003..