Document pBwOMmpZRRjM3wB06K2gj0a77

REPORT OF COMMITTEE D-27 ON ELECTRICAL INSULATING LIQUIDS AND GASES Committee D-27 on Hlcctrical Insulating Liquids and Gases, held (luce mediums during lie calendar ycai. The tegular spring meeting was held on M.ucii 11 to 14, 1973, n( the Houston Oaks Hotel in I louslon, Tex.. Minutes No, 43 gave details of this meeting to all nm mombcis. with cuircnt activities of subcommittees and sections. The second meeting, of Committee D-27 was held in conjunction with the Annual Meeting of the Society in Philadelphia, Pa., on June 24 to 27, 1973. Committee D-27 met at the Holiday Inn, while other activities of the Society took place at the Bellevue Stratford Hotel, the Benjamin Franklin Hotvl,anu the Shetaton Hotel. Our member.-, received Minutes No. 44 in which was related (lie busint-s> nansactcd at the several sessions. One of the. highhghts was (lie annual dinner fot members oi the Society and ihcir guests held in the spacious ballroom of the Bellevue Stialfoid Hole!. The final meeting of the year was convened hi the Statlcr Hilton Hotel in Boston. Mass., on October 14 to 17, 1973. Minutes No. 45 were distributed early in January 1974 covering details of the numerous section and subcommittee meet ings. The average attendance at the three meet ings was 39 members and 7 guests. The spring meeting in Houston attracted 38 members and 10 guests. The Annual Meeting in Philadelphia was attended by 37 members and 4 guests, while the Boston meeting had the highest number with 41 of our people ind 8 guests. A perfect record of attendance was attained by 29 members, while 46 mcmbois returned their ballots prior to all three meetings. Thirteen members failed to return any ballots. The membership of the committee totals 83 os 1973 doses, with 69 voting rcpicscni.ttives. The diversion of the members is 25 produccis (or 30%), 32 consumers (oi 39,;), and 26 general intcicst membets (or 31%). These percentage figutes arc of Interest as the Society icquircs a 60% return of ballots Horn the voting members to establish a lce.il ballot. The minimum return based upon the voting repicscniattves in Committee D-27 is 42 ballots (or (>0%). Althougii the member ship is slightly lowci than it was a year ago, the total of eonsumei and general interest members is well over the 50% math rquired by the Society. The committee has 70% in these combined categories, and cannot be said to be dominated by the producer interests. In past years, the Society found that tenative methods were used by industry as if they were the finally approved standard, and they appeared to have the same prestige as standards. It was noted that many tentative methods became standards with little or no revision. Permission to bypass the tentative period was decreed and (he committee has responded by offering all its newest methods as "standards." Since the revision of a stan dard or a tentative method requites (he same rigorous scrutiny, there has been no relaxa tion of vigilance in the preparation of these new methods. The committee now lias no tentative methods in its lists. The Society requires standard methods to be reaffirmed every five ycais, if no revision has been apptoved. When a revision is accepted by letter ballot, the year of the approval date is indicated In the ASTM designation. All the methods and specifica tions under the jurisdiction of the corn- 357 HONS 03957B REPORT OF COMMITTEE 0-27 mlucc fire examined each year and recom mended for teupproval if tire five year mlc applies. The lnlciiifilion.il LMcctrolcchnical Com mission (IRC) is ilu' European organization with aims and functions similar to ASTM. The Conference lificrnaiionale dos Grands Rcsoaux hlcelnqucs (OGRE) is an operating group with activities similar to the institute of Electrical mid Electronic Engineers (iniili) in (lie United States. During, the past yeai, E. L. Raab lias been lire chief delegate, and he has continued to head Technical Committee 10A on Insulating Liquids. Other representatives fiom the committee have been V. R. Mulhall for the Canadifin Standaids Association, )'. C>. Henignus who is a member of Technical Committee 10 U on Insulating Liquids Other Titan Hydrocarbon Oils, and T. W. Dakin is on Technical Com mitter IO-C on Gaseous Jnsulanis. These three technical committees have many pro jects scheduled for discussion during the coming year. Many of these relate to new loccdurcs and specifications promulgated y Committee D-27. The above members will monitor the IEC meetings and keep Committee D-27 informed on pertinent sub jects. Late in the year, Dt. T. K. Sloat was advised by the U.S. National Advisory Group of the IEC ihal it proposed to vest the IEC representation in Committee D-27. Considerable thought is now being given to the most suitable procedutc for selecting the U.S. representation, and the Committee D-27 bylaws will reflect the selection process. The activities of Committee D-2 include several subjects closely associated with Com mittee D-27 lest methods. We arc fortunate to have II. W. McCulloch, Jr.. as a co member of both committees. He keeps tire committee informed on matters of mutual interest. One item of interest in petroleum circles has been the various methods for determining the flash point of products. An d hoc group is investigating several methods and plans to develop a new precise method which will help to narrow the large variations in the present methods. The deter mination of neutralization number has been made mote precise and easier to duplicate within narrower limits as a result of similar committee work. The IEEE Fluids Subcommittee, with E. L. Raab as chairman, has completed work on a new revision of the Guide for Acceptance and Maintenance of Insuiaiini7 Oil in Id/uipincut. A new revision of the Guide for Maintenance of Transformer Askareh will be issued shortly. Woik is continuing on a Guide on Generated Gases in Oil-Immersed Transformers. Several yea is ago, when controversies arose 011 the prerogatives of Committees D-9 and D-27, (he scopes of which overlap to some extent, it was decided to form a D-9/D-27 Liaison Group with equal repre sentation from both committees. This has been an excellent proving ground lor dis cussion and has been the means of reconcil ing several negative votes on Mand.nd testing procedures. J. A. Dwyer serves as the per manent sccictaty and the present chairman, C. F. Ackerman, will complete his tenure in Septcmbei 1974. When Society Headquarters started the distribution of the new Membership Hook to each member of all technical committees, it was fell desirable to include the committee bylaws. In cider to keep in close touch with changes in the Society Regulations Govern ing ASTM Technical Committees. H.W. McCulloch, Jr., was appointed by the chair man to head a new Subcommittee D27.92 to monitor these changes. Subcommittee D27.91 on Symposia and Research under the leadership of R. L. Peeler has been conducting panel discussions twice a year at lire spring and fall meetings to discuss matters of cuncnt interest and to project ideas for the future. The environ mental problems associated with the acid treating of transformer oil. the shortage of optimum crudes, and the need for new oil-purifying techniques have made these discussions both interesting and instructive. The panelists have pointed out the probable shortcomings of the new oils in certain electrical industry functions and the possible need, to use paraffin base etudes in the future. These discussions will be continued during the coming year. There were several resignations and retire ments during 1972; An old friend and 358 MGNS 039579 **** REPORT OF COMMITTEE D 27 member of long standing, Dr. George II. vonPuchs, passed away in Apiil. lie lud been a inembor of the committee since 19.15. Among il;c retiring members wetr C. R. lions, P. K. I'ink amJ Toi Ocbek. proper proportions. The specification was piopored in order to hold contaminants such as carbon monoxide and dioxide to mini mum limits and to provide a low limit of moisture. RECOMMENDATIONS ON STANDARDS ACCEPTED l)V THE SOCIETY Subsequent to the Iasi annual report, Committee D-27 submitted Ihe following recommend,itiuns for letter ballot of the .Society, which were approved by the Society on the dates indicated: New Standards: I) 3255 - 73. Investigating the Compati bility of 1 ransfounci Insulation and Con struction Materials in Askarcls (Sub committee D27.02) (appiovcd Sept. 27, 1973) The inlcrtiction of transformer askarcl with materials used for dielectric or struc tural purposes is a complex phenomena. Tltis test provides information for selecting insulating and structural materials that will not Adversely affect the dielectric and chemi cal properties of the askarcl. The informa tion generated horn the use of litis test method should not he used to evaluate the effects of long lime service characteristics. D 3277 - 73, Test for Moisture Content in Oil-Impregnated Ccllulosic insulation (Subcommittee D27.07) (approved Oct. 29,1973) I) 3284 - 73, Test for Combustible Gases in Electrical Apparatus in the Field (Sub committee D27.07) (approved Nov. 27, 1973) This method covers the detection and estimation of combustible gases in (he gas blanket above the oil, or in gas detector relays in tiansfoimcis using poitable field instruments. It is only applicable with trans formers using minciai oil as the dielectric fluid. Gases dissolved in Ihe oil and non combustible gases are not determined. Arcing, corona discharge, and localized overheating in the insulation system of transformers result in chemical decomposi tion of the insulating oil and other insulating materials. with the founation of various gases, some of which arc combustible. Detec tion of these gases is frequently the first available indication of a malfunction. Port able combustible gas-meters are a convenient means of detecting tire picsencc of generated gases. Normal operation of a transformer may result in the formation of some com bustible gases. The detection of an incipient fault, if present, by this method involves an evaluation of the amount of combustible gases present, the rate of generation of these gases, and their rale of escape from the transformer. Moisture has an adverse effect on die lectric strength, dielectric loss, d-c resistivity, and aging characteristics of oil impregnated ccllulosic insulation materials. When ccllu losic insulation such as paper and pfessboard arc impicgnatcd with and immersed in oil, there is an interchange of moisture between the cellulose and oil until they attain equilibrium with respect to their relative saturation with moisture. * 1) 3283 - 73, Specification for Air as an Electrical Insulating Material (Subcom mittee D27.03) (approved Nov. 27, 1973) Revision ofStandards: D 901 - 73 (formerly D 901 - 71), Test ing of Askarcls (Subcommittee 1)27.02) (approved Nov. 27, 1973) This revision involved the addition of a statement on environmental impact in han dling and disposing of askarcls. D 923 - 73 (formerly D 923 - 70), Sam pling Electrical Insulating Liquids (Sub committee D27.07) (approved March 1, 1973) Tills specification is designated as apply A special method for sampling insulating ing to Type I, "Gaseous Air," and will apply liquids containing dissolved gases has been to both atmospheric air and to air synthe developed, where a syringe-type device has sized by blending oxygen and nitrogen in been used successfully. 3S9 MONS 039580 REPORT OF COMMITTEE D-27 D 1040 - 73 (formerly D 1040 - 72), Specification for Uninhibited Mineral In* sulaling Oil for Use in Transformers am] Oil ('ncuii Breakers (Subcommittee 1727.01) (approved Nov. 27, 1973) The revision added a statement on re fining methods and the selection of crude oil types as related to insulating oil quality. D 2112 - 73 (formerly D2I12 68 (J073). Test for Oxidation Stability of New Minci at Insulating Oils Containing 2,6-Ditoi1i:ny-RtUyl Pnia-Cicsol by Rotat ing Bomb (Subcommittee D27.06) (ap proved Od. 29,1973) The precision statements were rewritten, replacing the old ones, in order to obtain easier interpretation. D 2233 - 73a (formerly D 2233 - 70), ^Specification for Chlorinated Aromatic Tr Hydioeaibons (Askarels) for Capacitors ' (Subcommittee D27.02) (approved Oct. 29, and Nov. 27. 1973) A revision of the scope indicated that certain askarcl combinations were in useful service, although they were no longer sup* Elied by manufacturers. A statement on invironmcntal Impact was added. D 2283 ~ 73a (formerly D 22S3 - 71a), Specification fur Chlorinated Aromatic Hydrocaibons (Askarels) for Trans formers (Subcommittee D27.02) (ap proved Ocl. 29, and Nov. 27, 1973) A revision of the scope staled that certain askarcl compositions were no longer being supplied, but these now obsolete combina tions were still in useful service in the industry. A statement on Environmental Impact was also added. D 2864 - 73b (formerly D 2864 - 72b), Definitions of Terms Relating Iq Electri cal Insulating Liquids and Gases (Sub committee D27.04) (approved Feb. 9, July 13,andNov.27,1973) * Six new definitions were added in January 1973. An introduction and two additional definitions were approved in October 1973. D 3146 - 73 (formerly D 3146 - 72). Specification for Oxidation-Inhibited Mineral Insulating Oil for Use in Trans formers and in Oil Ciuuii Breakers (Sub committee D27.0I) (approved Nov. 27, 1973) The revision consisted of the addition of a statement to the specification on refining methods and lire selection of crude oil types as related to insulating oil quality. Rcapproral ofStandards: D 831 - 63 (1973). Test for Gas Content of Cable and Capacitor Oils (Subcommittee D27.07) (approved Oct. 29, 1973) D 924 -- 65(1973), Test foi Power Factor . and Dielectric Constant of Electrical In sulating Liquids (Subcommittee D27.05) (approved Oct. ?9. 1973) D 1169 - 64(1973), Test for Specific Resistance (Resistivity) of Electrical In sulating Liquids (Subcommittee 1)27.05) (approved Ocl. 29, 1973) D 1315 - 63 (t97.3). Test for Water in Insulating Oils by Extraction (Subcom mittee D27.07) (appiovcd Ocl. 29, 1973) D 1533 - 61 (1973). Test for Walci in Insulating Liquids (Kail Fischer Method) (Subcommittee D27.06) (approved Oct. 29,1973) ' D 1534 - 64 (1973), Test for Approximate Acidity of Used Electrical Insulating Liquids by Color-Indicator Titration (Subcommittee D27.06) (approved Ocl. 29,1973) D 1698 - 64 (1973), Test for Sediment and Soluble Sludge in Service-Aged Insulating Oils (Subcommittee D27.07) (approved Oct. 29, 1973) D 1701 -- 69 (197.3). Test for Scavenger Content in Askarels (Subcommittee D27.06) (approved Oct. 29,1973) D 1807 - 64 (197.3), Tests for Refractive Index and Specific Optical Dispersion of Electrical insulating Liquids (Subcom mittee D27.07) (approved Oct. 29, 1973) D 1808 - 63 (1973), Test for Volume of Oil in Oil-Contaminated Askarels (Sub committee D27.07) (approved Ocl. 29, 1973) D 1810 - 63(1973), Test for Specific Gravity of Askarels (Subcommittee D27.07) (approved Oct. 29, 1973) \ HONS 039581 REPORT OF COMMITTEE D 27 D 1821 - 63(1973), Test for Inorganic Chlorides in Askatcls (Subcommittee D27.06) (approved Oct. 29, 1973) D 1903 - 63 (1973). Test for Coefficient of Thcunal Expansion of Electrical Insulatlug Liquids of Pcltoleum Origin, and 7 Askarcls (Subcommittee 1)27.07) (ap proved Oct. 29, 1973) were recommended to the American National Standards Institute (ANSI) Com mittee Ptojcct C59 fot consideration as ANSI standaids. This is now an automatic ptojcct and no recommendation from Com mittee D-27 is required. No new approvals have been published in 1973. l) 2U2 - 68(1973). lest for Oxidation Stability of New Mineral Insulating Oils ACTIVITIES OF SUUCOMMITTEES Containing 2, 6Di!ojiary-Bulyl ParaCresol by Rotating bomb (Subcommittee D27.06) (approved Maich I, 1973) Materials Subcommittee D27.Q] on Mineral Oils (L. L. Ranh, chairman) is con cerned with methods of testing, and specifi D 2129 - 64(1973) Test for Color of cations for insulating oils for tiansfoimcis. Chlorinated Aromatic Hydrocarbons circuit breakers, cables, and accessories. At (Askaiels) (Subcommittee D27.07) (ap each of tire three meetings, there has bceft proved Oct. 29, 1973) prolonged discussion of the looming short! Miscellaneous Changes in Standards: 1) 24)3 - 7), Standard Method for Prepar ing and Irlcctiical Testing of Insulating Paper Impregnated with a Liquid Die* )cctr)c(Subcommittee D27.05) age of mincial insulating oil of the eonven-l tional quality to which the industty lias been) long accustomed. Almost overnight, thel environmental problems associated with the acid relming method of mireia) oil purifica-1 lion became so serious that new methods I This method has been under Die joint Jurisdiction of Committees l)-9 and D-27. Committee D-27 withdrew as a custodian giving Committer D-9 sole jurisdiction (ap had to be introduced by some refiners. The question arose ns to whcthei industty circles I outside ASTM knew of (he impending changes. The decision Was touched that proved July 24v 1973). Committee D-27 should prepare a warning I 1973). letter and place it in (lie hands of key ` D 1275 - 71, Standard Test for Corrosive Sulfur in Electrical Insulating Oils (Sub committee D27.06) A note was added to this method referring to the identical properties of 240-grit silicon carbide paper and ISO-mesh silicon carbide plains, pointing out that these sizes arc identical. D 2472 - 71, Standard Specification for Sulfur Hexafluoride (Subcommittee 1227.03) personnel and industry oipanizahons. This was done, and studies arc now underway on a variety of new processes lor the purifica tion of mincial insulating oil. This was the subject of tire panel discussion in October 1973, and will be continued at the first 1974 meeting to be held in Phoenix, Ariz., in March. Section D27.0l.0l on Surrey (R. L. Peeler, chairman) will set tip a task force to prepare specifications for the new insulating oils. This specification indicated that further work on requirements foi gas service were under consideration, but this sentence has been deleted from the Scope as no work is contemplated. RECOMMENDATIONS ON ANSI STAN1>AUDS In past years standard methods and .specifications prepared by Committee D-27 Section D27.0L02 on Transformer Oils (R. L. Peeler, chainnan) obtained letter bal lot approval for statements to be added to the specifications for the minetnl grade of insulating oil (with no inhibitor) as well us the oxidation-inhibited matciial commenting on the effect of crude oil selection and refining picparation on oil quality. A (ask force under T. C. Lipscomb will consider all classes of inhibitors and not limit its activity solely to antioxidants. It 36 J HONS 0395Q2 REPORT OP COMMITTEE D-27 will also consider poor depressants, and compressed atmospheric air or air syn retarders of all other calcp.otjcs separately. thesized by blending oxygen and nitrogen. A warning statement is living placed hi The Standard Specification for Nitrogen the specification for the osidniion-inbibiH'd Cas as an Electrical Inrukiting Material, oil. 1) 3146, to avoid loss of additive when I) 1933*73, lias been reapproved as a stan dehydrating at elevated temperatures and dard. reduced pressure. Subcommittee D27.0-f.06 on Nomencla Section D27.OI.Oi on Corona Phenom ture am! Drjhnthms of Terms Relating to ena (li. Simo. chairman) has gathered data ElectricalInsulating Liquids (T. G. Lipscomb, and will cal! a meeting in 1974. chairman) has obtained approval on an Section D27.0l.0S on Effects of DC introductory statement foi 13 2864, winch Voltage on hiuicli (li, L. Morrison, chair Is flic compendium for definitions prepared man) will try to lurid a meeting in 1974 to by the subcommittee. Dining the past vcai, determine the extent of interest in this eight new terms have been appioved and live project. additional definitions arc ready for letter Section D27.01.06 on Effects of Ma ballot. Roth Committee D-9 and Committee terials on htsufotinx Oils (J. H. Orum, D-27 prepare delmilions on insulating terms, chairman) has a method now being balloted with the forma committee handling the by the committee for apptoval. terms on solid-type insulation in D 1711, Materials Subcommittee D27.02 on and the latter group using D 2864 as its Synthetics (R. M. Prey, chairman) has com medium for lams on liquid and gnsirnus pleted the new stnndaul method for the insulnnis. Where there is duplication, cvety compatibility of construction materials in effort is made to obtain identical wording. askards, I) 3255. Changes have been voted in the conditions for obtaining the resistivity of askaiels (for capacitors), D 2233 and (for transformers) I) 2283. Methods Subcommittee D27.05 on Electrical Tests (R. 1. Lowe, chairman) has a new method, D 3300, now being balloted for approval for determinin'; the breakdown A statement on enviionmentnl impact, lias voltage of electrical Insulating oil under been incorporated in D 901, D 2233, and Impulse conditions. Two methods have been D 2283. ' reapproved $ standards, 1> 924 on Power Section D27.02.02 on Askate is (P. C. Benignus, chairman) after completing the work on the new method for compatibility of askarcls, D 3255, is prepared to use this same procedure in testing new askarci mix tures which ate being proposed and offered from lime to time by the manufacturers. In this connection, every effort is being made to make minimum use of the higher boiling homologucs of PCU's as they resist biude* gradabilily. Section D27.02.03 on Silicones (R. F. Burow, chairman) has a new chairman re placing Clayton Schultz., who has retired. A program for continuing die work on sili cones is being developed. Materials Subcommittee D27.03 on Cases (C. E. Welsh, chairman) has completed a Standard Method for Air as an Insulating Material, 13- 3283. This will apply to Type 1, "Caseous Aiiwhich is now packed in Factor and D 1169 on Resistivity. The joint jurisdiction with Committee D-9 over D 2413 on (lie electrical testing of oil impregnated paper insulation has been termi nated in favor of Committee D-9. A note inserted in D2477, on the bicakdown voltage of insulating gases, indicates (he indeterjninani effect of irradiation of the gas sample during testing. Section D27.05.Ul on Power Factor and Resistivity (R. I, Lowe, chaimian) is working to Improve the accuracy of mcasuicmcnts by D 1169, after completing some round-robin testing. Section D27.05.02 on Dielectric Strength of Insulating Liquids. (P. IT. Ast, chairman) is undertaking round-robin tests on D877 and D )8l6. and will attempt to standardize the conditions of testing, in order to obtain a true comparison of results. Section D27.05.06 on Dielectric Strength high-ptcssuic metal containers. This may be of Cases (W. G. Ertfman, chairman) has HONS 039583 REPORT OF COMMITTEE 0-27 revised I) 2477, but data on irradiation effects will be investigated. Section D?7.P5J'S on Impulse Testing (II. G. Lrdntan, chairman) will become in active with (he approval of the new standard method I) 3.300. It lias been pointed out lhat this test procedure is becoming in creasingly important with the use of extia- high-voltage and uftrahigli-vo/lage equip ment. Methods Subcommittee D2 7.06 on Chemical Tests (V. R. Mulhall, cluihman) has reapproved four of its methods as standards: l) 1533. Test for Water in In sulating Liquids (Kail Fischer Method); D ISM, Test for Approximate Acidity of Used Electrical Insulating Liquids by ColorIndicator Titration; 17 1701, Test for Scavenger Content in Askarcis; and D 182), --^ Test note for Inorganic Chlorides in Askarcis. A wus added to D 1275 on Corrosive Sulfur to clarify the silica grit size. A revision of the procedure for catalyst prep aration has been approved in D 2H2, Oxidation by Rotating Bomb. Section 027.06.02 on Oxidation (C. E. Tniutman, chairman) is reviewing 17 2440, Oxidation Stability of Mineral Insulating Oil. in order to make it interchangeable with the ICC method. The use of the 1EC method for Inhibited oil is being examined with perhaps testing at higher temperatures or for longer periods of time. Section 027.06.07 on Water Content (T. K. Sfoni, chairman) is considering a second procedure using a patented apparatus which is more accurate for testing oils of low moisture content. Methods Suheommittee D27.07 on Phvsi- eel Jests (II. G. Lidman, chairman) has reapproved eight standard methods, D 831, D 1315, D 1698, D 1807, D 1808, 17 1810, D 1903, and D 2129. Five new standard methods have been approved and accepted by (he .Society. These were the standard Method 1) 3277, Determination of Moisture Content in Oil-Impregnated Ccilu* iosic Insulation; Method D 3284. Test for Combustible-Gases in l-.lcctrical Apparatus in (he Field; Method l> .1303, Rapid Gas Chromatographic Estimation of Higher Boiling Homotogucs of Chlorinated Bi phenyls for Capacitor Askarcis; Method D 3301, Analysis of Environmental Ma terials for Polychlorinated Biphenyls; mid * Method I) 3305, Sampling Gas from a Transformer. A revision of the standard method for sampling. D 923, was approved with (he addition of a syringe technique for sampling where gas is present in oil. Section 027.07.0i on Sampling (R. I. Lowe, chairman) will try to reduce the complexity of methods in D 923 on sam pling. Two new procedures for sampling gas in oil may be added to 17 923 rather than lo become (wo more separate, methods. Section D27.07.0-f on Water by Extrac tion (J. II. Orum, chairman) has reapproved Standard Method I) 1315. Section 027.07.09 on Infrared Absorp tion (R. H. Kershaw, chairman) has re mained in active status, but no new material on the dotation of other additives (lum 2,6-dUcitiary-butyl para-crcsol has become available. Section D27.07.I2 on Gas Chromatog raphy (U. L. Motrison, chairman) which was reactivated to cooperate on the method for estimation of PCB's has become inactive with the appioval of the new method, D 3303, Section D27.07.i6 on Combustible Gases Over Oil (E. L. Morrison, chairman) has obtained approval on tire new method, D 3284, after obtaining a waiver on certain patent rights or. this technique. Section 027.07.IS on Analysis of Gases (V. R. Mulhall. chairman) has had numerous trial methods in an endeavor to reconcile all objections and may have a standard icady for ballot in 1974. Section D27.07.I9 on Detection of Poly chlorinated Diphenyls (PCD's), (P. G. Benignus, chairman) has completed work on the two methods which have recently received Society approval, D 3303 and D 3304. Both methods were urgently re quired and were brought to stnndaid status by a gratifying cooperative effort. Subcommittee 027.91 on Symposia and Research (R. L. Peeler, chairman) held two panel discussions during the year. At the March 1973 meeting in Houston, Tx., the panel members were J. E. Morgan of the Morgan Schaffer Corp., U. L. Morrison of Los MQNS 039564 REPORT OP COMMITTEE D-27 Angeles Derailment of Power and Water, and T.K, SJoat of Westmghousc Electric Corp. They explained the "Intcrpicution of Transformer Oas Anal) ses." 'Die second pane] consisting of R. 1. Lowe, l\ W, Heinrichs. J. X. Hastings, U. T. Kent. Ji., ami H. W. McCulloch, Jr., met at tlic meeting in' Boston. Mass. This was a well-attended meeting anil they discussed the new types of insulating oils to bo expected from the changes in refining processes. The discussion planned for the March 1974 meeting in Phoenix, Am., will he of utmost interest to the industry. Topics will' be the re-refining of used transformer oils and experience in mixing different types of oils fiom different processes. Subcommitice D27.92 on Bylaws (11. W. McCulloch, Jr., chairman) has rccoived re vised regulations for technical committees lo be incorporated in the bylaws. These changes will appear its a new section lo he sent to each member foi his membership book. The selection of an I EC representative or a group to carry on the participation of the Committee in the IEC will be described in the bylaws, as this (unction has now' been transferred to Committee D-27. Respectfully submitted on behalf of tire committee, . C. A. Johnson, Membership Secretary T. K.SIoai, Chairman 364 0395B5 HONS