1、3404583 0005473 T . 5 Y Power transformers Part 5: AbiLity to withstand short circuit Transformateurs de puissance Cinquime partie: Tenue au court-circuit Leistungstransformatoren Teil 5: KurzschluAfestigkeit RD: HD 398.5 S1 (IEC 76-5 (IS761 ed 1 +Arndt 1 (19791, modified; CLWTC 441, not appended -
2、Title Page ReLated to Directive: - - Amendment .i to HD 398.5 Ci prepared by CENELEC/TC 14 date of ratification : 1986-09-09 date of announcement : 1987-01-01 date of latest publication : l?87-07-*1 date of withdrawal : 1587-07-01 -_I_- LXST OF NATIONAL STANDARDS IS GIVEN OVERLEAF 3404583 0005474 1
3、HA RMON I Z ED NAT I ON AL 5 TAN DA R DS AN 1 to HD 398.5 SI L- AT : BE : CH : DE : riti : ES : FI : FR : Gel : , GR : I : IT : . LU : NC)S NL : NO : PT : SE : I doa: 1987-01-01 dop: 1987-07-01 dow: 1987-07-01 POGIER TRANSFORMERS PART 5: ABILITY TO HITHSTAND SHORT CIRCUIT .Transformateurs de pu i s.
4、sance Cinquime partie: Tenue au Teil 5: court-circuit KurzschLuAfest igkeit Le i s t ungst rans f orma t oren Amendment 1 to HD 398.5 S? was prepared by CLC/TC 14 and rat i f i ed by CENELEC on .l?86-09-09. It correets/rndifies the English version of HI! 398.5 51. The changes to be made to the HD ar
5、e given overleaf. Copyright reservd to all CENELEC members 3404583 0005476 5 Column 1 -2- Amenbent. 1 to HD 398.5 El Column 2 CLAUSE MODIFIED : Column 3 Sub-clause 2.1.4. Table III, “Maximum permissible values of the highest average temperature 8 1 of the winding after short-circuit“. Column 4 COMMO
6、N MODIFICATION : Modify as follows the part of table III related to dry-type transformers : I 105. (A) 120 (E) 130 (B) and higher tempe- ratures (F, etc.) 180 25 O 180 200 I I JUSTIFICATION : For the classes A E B F and the temperatures characterizing them, there is P complete agreement between the
7、LEC documents dealing with the classification of the insulating materials or with the transfomers : Publication 85 of 1957 on the classification of the insulating materials (Section 11) Publication 76-2 of 1976 “Power tramformers - Past 2 : Temperature rise“, table III, column 3. Publication 726 of
8、1982 “Dry-type power transformers“, table IV, column 2. Draft 15 B(Centra1 Office)55, revision of Publication 85, of September 1982. this agreement does not exist any more for the classes corresponding to higher temperatures, from class E. Consequently, for these classes, column 2 of table III of EID 398.5, aligned with IEC Publication 726, is not in agreement with table III of HD 398.2, aligned on LEC Publication 76-2. It is not in agreement, either, wLth IEC Publication 85 and its new draft. This Amendment deletes in column 2 the unnecessary. details which gave these discrepancies.
