1、GENERAL SECRETARIAT TBI. 02 - 511 79 32 - Telex 26257 Cenlec 5 Rue GrBderode 2, Bee 5 - 1000 BRUXELLES This HD consists of the following: TITLE PAGE COMMON MODIFICATIONS 7 *-li- - HD 390.3 i N FO R MATION SHEET ISSUE 1 1986-01-23 Not Related to EEC Directive date of ratification: 1985-12-03 date of
2、announcement: 1986-06-01 date of latest publication: 1987-01-01 date of withdrawal: 1987-01-01 List of national deviations Issue 1 JUNE 1985 HARMONIZED NATIONAL STANDARDS: AT : BE : SP (NBN C 52-103) CH : DE : OK : ES : FI : FR : GB : GR : IE : IT NR (CEIa.14-4 (1983) LU : NOS NL : NO : PT : NOS SE
3、: .- - - - - a-4-1swg-s_E-Eti -I HD 3983 -c - . GEN E R A L S E C R ET A-R-I AT Rue Brderode 2, Bte 5 - 1OOU BRUXELLES 26257 Cenlec O ENGLISH VERSION UDC: 621.3i4.2.016.2.0U1.2.UU1.4.004.12 (083.71) Key words: Power transformers - requirements - testing - properties - definitions - insulation levels
4、 - dielectric tests POWER TRANSFORMERS INSULATION LEVELS AND DIELECTRIC TESTS Transformateurs de puissance Transformatoren Ni I e a u x d is0 1 e m e n t e t essa is dilectriques prf ungen Isoationspegei und Cpannungs- BOUY OF HD The Harmonization Document consists of: - - IEC 76-3 (1980) edition 1
5、and Amendment No.1 (19811, not appended common modifications prepared by CENELEC TC 14 This Harmonization Document was approved by CENELEC on 3 December 1985. The English and French versions of this HD are provided by the text of the IEC publication and the German version is the official translation
6、 of the IEC text. All texts prepared by CENELEC exist in three official versions (English, French, and German). According to thv CENELEC Iriternal Regulations the CENELEC member National Com mitt ees are bound: to announce the existence .of this Harmonization Document at national level by or before
7、1986-06-01 to publish their new harmonized national standard by or before 1987-01-01 to withdraw all conflicting national standards by or before 1987-01-01. Harmonized national standards me listed on the HD information sheet, which is available from the CENELEC National Committees or fran the CENELE
8、C General Secretariat, The CENELEC National Committees are the nationl electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxemburg, Netherlands, Norwy, Portugal, Spain, Sweden, Switzerland, United Kingdom, Copyright reserved to ail CENELEC me
9、mbers - - W 3404593 0005451 O-! -2- I) GENERAL This Harmonizztion Document wes presared by CENELX TC 14, foilowing tne decision tplete text of this IEC Stm- dard, modified as stzted ic Amendment No. 1, is endorsed as HD 398.3 with the exception of the connoaly sgreed CEm- LEC modifications to Clause
10、s2,3,5. (including table II), 6, . :o I 1,1,13,14,A3* I. The text tdces into account the decisions taken at the 43rd End 44th meetings of the Techniczl Bomd, with same editorial varietions decided unariimously curing Frmkfurt meeting of TC 14. 2) RATIONAL EEVIiiTIOKS 3 - devietions, to be removed wi
11、thin 5 yams, have been re- que s t ed : - for Table II of sub-clause 5.2 and 5.3 by FR-O, 300 kV, specified according to method 1“ $!Iodif icatfon : - in the title, delete ltphzse-to-earthii. - Add at the end of Lhe Sub-clause, on page 37, just after the exi- sting Note which will becoze Wote ltl, a
12、 second Note as ollows : Y?ote 2 : An additional induced overvoltage withstand test with symmetrical three-phase voltages according to sub-clause 11.2 may be agreed as i special $estfi. JuetiIication : The soecial test consiaered in this additional Note may be useful in some cases, in pzrticular for
13、 generator transformers. The addition cz“ illis noie concerning such a test leads to delek lphase-to-earthlt in the tiile. These words wDuld for defining the scoDe of +he Sub-clzuse, not be ap-roprizte iind the rest of the title is sczac-ienz .-.e. 3404583 0005456 T Sub-clause 11.4 “Induced overvolt
14、age m23hsta_rlt test for trzrisfor- mers with non-unixormly insulated H.V. wir,dln/c;s, Urn , 300 kV, soe- cified according to nethod 2“ : Xodification : .,a Add on page 41, after the existing Note which becomes Note I“ second Rote as follows: Wote 2 : If 8 three-phase transformer is to be teste in
15、symmetri- cal three-?hase connection, the test voltage - between phases is higher than in single-phase connection. This may influence the phzse-to-phase insulation Cesign. fl Jus tification : This additional text draws a-Ltention to certain diferen- ces between single-phase an6 three-pnase tests. mu
16、st be taken into account when designing the transfor- mer. These Sub-clause 13.3 “Test with lightning imulse ckoqed on the tzil - Test sequence and tecT criteria : “If a rod-gzp is used 2s the chospicg G=vice, tiries to chopzing will oftelz be very close but need not necessdril; be so. An acceptable
17、 alternative test sequence is to omit the reduced chopped impulses 2nd the test criteriz zre then the conoarisons of the records of all the lOO$ full en6 reduced fuLl izrigulses and those perks of the chopped impulses up to the time of cho7). i These should be no varistions between these records ir,
18、 excess of what would normally be ellowed between reccrds of full wave ?ests only* I Ju s t i :?i c 2-k i on : Useful addition ccncexing the test sequence and crlteria which nq be used when the chop2inG device is a rod-gap, 3404583 0005457 I M, 398.3 -7- toge thertt JGstification : -. T-he words beS
19、weer, brackets, which refer to figure 2 of Sub-clause 11.4, could be misinterpreted because in this Figure the %wo rel-aining terminals as EO% connected tcge-bher, while it mey be better tc have this connection. - - Clause A 3 of Appeneix A tlApTlication guide or z-rtivl dLsc_arge measurenents. . .
20、Ins-kurnents frequency range“ : Modification t In the second sentence of the fou.r%h paragraph replace l1a SE.r_dwidth of about 70 BHz, or less“ by “8 bzndwidth of about 9 IrHzff. Jus%ification : The purpose is to Elign the text with CZSP? and with Appendix D of Z3;C Publication 270 JPartial dischzr
21、ge me as v. r enen t s It. G E N E R A L S E C R E T”A R I A T ISSUE 1 JUNE 1985 Rue Brderode 2, Bte 5 - B 1000 BRUXELLES Tel. O2 - 511 79 32 - Telex 26257 Cenlec b ENGLISH VERSION LIST OF NATIONAL DEVIATIONS TO HD 398.3 POWER TRANSFORMERS INSULATION LEVELS AND DIELECTRIC TESTS Transformateyrs de pu
22、issance Transformatoren Niveaux disolement et essais dilectriques prf ungen Isolationspegel und Spannungs- This list presents national deviations from the content of the Harmonization Document HD 398.3 which could not be removed before the time of approval of the HD. The requirements of these deviat
23、ions are applicable only in the countries concerned until the expiry of the specified date of withdrawal. Thereafter the requirements of the deviations are void. This list was prepared by the CENELEC TC 14. Copyright reserved to ail CENELEC members iD 398.3 (deviations accepted in Paris and Ililan m
24、eetings) France e.nd the Netherlarids are allowed %o have-national deviations, lini- teh to 5, years, as follom: a) ,hance is allowed to modify as follows Table TI: . , - for Um= 24 kV an additional set of withstand Voltages my be added, nzmely 45 kV in column 2 and 95 kV in col- 4 (nothing in 001nn
25、 3) j - for Um= 245 kV, 900 kV oiay be kept instead of 950 kV b) the Netherian& are allowed: - to add in Table the level Un= 60 kV with the following withstand voltages: 175 kV in colmm 2 and 280 kV in colunn 3, - to Teplace in. cuib-claxe 11.1, for the miriim dwatiori of the test 15 secoa& by 30 seconds Just if ica-tion These .levels and this testing proceure are widely applied in said Countries. JWe 1985
