1、BRITISH STANDARD BS EN 60076-1:1997 Incorporating Amendments Nos. 1, 2 and 3 Power transformers Part 1: General The European Standard EN 60076-1:1997, with the incorporation of amendments A11:1997, A12:2002 and A1:2000, has the status of a British Standard ICS 29.180 BS EN 60076-1:1997 This British
2、Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 September 1997 BSI 13 December 2004 ISBN 0 580 27732 1 National foreword This British Standard is the official English languag
3、e version of EN 60076-1:1997, including amendments A11:1997, A12:2002 and A1:2000. It is identical with IEC 60076-1:1993, Edition 1:1993, which comprises Edition 2:1993 consolidated by the incorporation of amendment 1:1999. The start and finish of text introduced or altered by amendment is indicated
4、 in the text by tags !“. Tags indicating changes to text carry the number of the amendment. For example, text altered by CENELEC amendment A1 is indicated by !“. The UK participation in its preparation was entrusted to Technical Committee PEL/14, Power transformers, which has the responsibility to:
5、A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International St
6、andards Correspondence Index”, or by using the “search” facility of the BSI Electronic Catalogue or of British Standards online. This publication does not puport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standa
7、rd does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European
8、 developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 41 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publ
9、ication Amd. No. Date Comments 9925 April 1998 13797 1 July 2002 Changes to Scope and addition of Annex ZB 15461 13 December 2004 See National forewordEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60076-1 May 1997 +A11 +A1 December 1997 November 2000 +A1 2 February 2002 ICS 29.180 Supersedes
10、EN 60076-:1997/A11:1997 Descriptors: Power transformers, general, service conditions, definitions, rating plates, tolerances, tests, enquiries (requests for proposal), orders English version P o w e r t r a n s f o r m e r s Part 1: General (IEC 60076-1:1993 + A1:1999) Transformateurs de puissance P
11、artie 1: Gnralits (inclut les amendements A11:1997, A12:2002 et A1:2000) (CEI 60076-1:1993 + A1:1999) Leistungstransformatoren Teil 1: Allgemeines (enthlt nderungen A11:1997, A12:2002 und A1:2000) (IEC 60076-1:1999 + A1:1999) This European Standard was approved by CENELEC on1997-03-11; amendmend A1
12、was approved by CENELEC on 2000-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning s
13、uch national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own
14、 language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portu
15、gal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels CENELEC All rights of exploita
16、tion in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60076-1:1997 + A1:2000 EEN 60076-1:1997 BSI 13 December2004 2 Foreword The text of the International Standard IEC 76-1:1993, prepared by IEC TC 14, Power transformers, together with the common modifications prepare
17、d by the Technical Committee CENELEC TC 14 was submitted to the formal vote and was accepted by CENELEC as EN 60076-1 on 1997-03-11. This European Standard supersedes HD 398.1 S1:1980 and HD 398.4 S1:1980. Technical differences relate mainly to certain measures (e.g. of flexibility in given circumst
18、ances) to bring the standard in line with actual requirements of Users specifications. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard Annex A, Annex E and Annex ZA
19、are normative and Annex B, Annex C, Annex D and Annex F are informative. Annex ZA has been added by CENELEC. Foreword to amendment A11 This amendment was prepared by the Technical Committee CENELEC TC 14, Power transformers. The text of the draft was submitted to the Unique Acceptance Procedure and
20、was approved by CENELEC as amendment A11 to EN 60076-1:1997 on 1997-10-01. The following dates were fixed: Foreword to amendment A12 This amendment to the European Standard EN 60076-1:1997 was prepared by the Technical Committee CENELEC TC 14, Power transformers. The text of the draft was submitted
21、to the formal vote and was approved by CENELEC as amendment A12 to EN 60076-1:1997 on 2002-02-01. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard, Annex ZB is inform
22、ative. Annex ZB has been added by CENELEC. Foreword to amendment A1 The text of document 14/344FDIS, future amendment 1 to IEC 60076-1:1993, prepared by IEC TC 14, Power transformers, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to EN 60076-1:1997 on 200
23、0-04-01. NOTE This amendment A1 is identical to EN 60076-1:1997 /A11:1997 except for the reference to CENELEC Report R014-001. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop)
24、1997-09-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1997-09-01 latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1998-06-01 latest date by which the
25、 national standards conflicting with the amendment have to be withdrawn (dow) latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2003-02-01 latest date by which the national standards conflicting with th
26、e amendment have to be withdrawn (dow) 2005-02-01 latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2001-05-01 latest date by which the national standards conflicting with the amendment have to be withd
27、rawn (dow) 2003-04-01EN 60076-1:1997 BSI 13 December2004 3 Contents Page Foreword 2 1 Scope and service conditions 5 1.1 Scope 5 1.2 Service conditions 5 2 Normative references 6 3 Definitions 7 3.1 General 7 3.2 Terminals and neutral point 7 3.3 Windings 8 3.4 Rating 9 3.5 Tappings 10 3.6 Losses an
28、d no-load current 12 3.7 Short-circuit impedance and voltage drop 13 3.8 Temperature rise 13 3.9 Insulation 14 3.10 Connections 14 3.11 Kinds of tests 15 3.12 Meteorological data with respect to cooling 15 4R a t i n g 1 5 4.1 Rated power 15 4.2 Loading cycle 16 4.3 Preferred values of rated power 1
29、6 4.4 Operation at higher than rated voltage and/or at disturbed frequency 16 5 Requirements for transformers having a tapped winding 16 5.1 General Notation of tapping range 16 5.2 Tapping voltage tapping current. Standard categories of tapping voltage variation. Maximum voltage tapping 17 5.3 Tapp
30、ing power. Full-power tappings reduced-power tappings 17 5.4 Specification of tappings in enquiry and order 18 5.5 Specification of short-circuit impedance 19 5.6 Load loss and temperature rise 20 6 Connection and phase displacement symbols for three-phase transformers 21 7 Rating plates 23 7.1 Info
31、rmation to be given in all cases 23 7.2 Additional information to be given when applicable 23 8 Miscellaneous requirements 24 Page 8.1 Dimensioning of neutral connection 24 8.2 Oil preservation system 24 8.3 Load rejection on generator transformers 24 9T o l e r a n c e s 2 4 10 Tests 25 10.1 Genera
32、l requirements for routine, type and special tests 25 10.2 Measurement of winding resistance 27 10.3 Measurement of voltage ratio and check of phase displacement 28 10.4 Measurement of short-circuit impedance and load loss 28 10.5 Measurement of no-load loss and current 28 10.6 Measurement of the ha
33、rmonics of the no-load current 29 10.7 Measurement of zero-sequence impedance(s) on three-phase transformers 29 10.8 Tests on -load tap-changers 30 11 Electromagnetic compatibility 30 Annex A (normative) Information required with enquiry and order 31 Annex B (informative) Examples of specifications
34、for transformers with tappings 33 Annex C (informative) Specification of short-circuit impedance by boundaries 34 Annex D (informative) Three-phase transformer connections 35 Annex E (normative) Temperature correction of load loss 38 Annex F (informative) Bibliography 38 Annex ZA (normative) Normati
35、ve references to international publications with their corresponding European publications 39 Annex ZB (informative) Installation and safety of a liquid immersed transformer 404 blankEN 60076-1:1997 BSI 13 December2004 5 1 Scope and service conditions 1.1 Scope This part of International Standard IE
36、C 76 applies to three-phase and single-phase power transformers (including auto-transformers) with the exception of certain categories of small and special transformers such as: single-phase transformers with rated power less than 1 kVA and three-phase transformers less than 5 kVA; transformers havi
37、ng no windings with rated voltage U nhigher than 1 000 V; instrument transformers; transformers for static convertors; traction transformers mounted on rolling stock; starting transformers; testing transformers; welding transformers. NOTE When IEC standards do not exist for such categories of transf
38、ormers, this part of IEC 76 may still be applicable either as a whole or in part. For those categories of power transformers and reactors which have their own IEC standards, this part is applicable only to the extent in which it is specifically called up by cross-reference in the other standard. 1)
39、At several places in this part it is specified or recommended that an “agreement” shall be reached concerning alternative or additional technical solutions or procedures. Such agreement is to be made between the manufacturer and the purchaser. The matters should preferably be raised at an early stag
40、e and the agreements included in the contract specification. 1.2 Service conditions 1.2.1 Normal service conditions This part of IEC 76 gives detailed requirements for transformers for use under the following conditions: a) Altitude A height above sea-level not exceeding 1 000 m (3 300 ft). b) Tempe
41、rature of ambient air and cooling medium A temperature of ambient air not below 25 C and not above +40 C. For water-cooled transformers, a temperature of cooling water at the inlet not exceeding +25 C. Further limitations, with regard to cooling are given for: oil-immersed transformers in IEC 76-2;
42、dry-type transformers in IEC 726. c) Wave shape of supply voltage A supply voltage of which the wave shape is approximately sinusoidal. NOTE This requirement is normally not critical in public supply systems but may have to be considered in installations with considerable convertor loading. In such
43、cases there is a conventional rule that the deformation shall neither exceed 5 % total harmonic content nor 1 % even harmonic content. Also note the importance of current harmonics for load loss and temperature rise. d) Symmetry of three-phase supply voltage For three-phase transformers, a set of th
44、ree-phase supply voltages which are approximately symmetrical. e) Installation environment An environment with a pollution rate (see IEC 137 and IEC 815) that does not require special consideration regarding the external insulation of transformer bushings or of the transformer itself. An environment
45、 not exposed to seismic disturbance which would otherwise require special consideration in the design. (This is assumed to be the case when the ground acceleration level a gis below 2 m/s 2 .) 2) 1) Such standards exist for dry-type transformers (IEC 60726), for reactors in general (IEC 60289), for
46、traction transformers and reactors (IEC 60310), and are under preparation for static convertor transformers.EN 60076-1:1997 6 BSI 13 December2004 1.2.2 Provision for unusual service conditions Any unusual service conditions which may lead to special consideration in the design of a transformer shall
47、 be stated in the enquiry and the order. These may be factors such as high altitude, extreme high or low temperature, tropical humidity, seismic activity, severe contamination, unusual voltage or load current wave shapes and intermittent loading. They may also concern conditions for shipment, storag
48、e and installation, such as weight or space limitations (see Annex A). Supplementary rules for rating and testing are given in other publications for: Temperature rise and cooling in high ambient temperature or at high altitude: IEC 76-2 for oil-immersed transformers, and IEC 726 for dry-type transf
49、ormers. External insulation at high altitude: IEC 76-3 and IEC 76-3-1 for oil-immersed transformers, and IEC 726 for dry-type transformers. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 76. At the time of publication, the editions indicated were valid. All normative
