BS EN 60076-13-2006 Power transformers - Self-protected liquid-filled transformers《电源变压器 自我保护式充液变压器》.pdf

1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58The European Standard EN 60076-13:2006 has the status of a British StandardICS 29.180Power transfor

2、mers Part 13: Self-protected liquid-filled transformersBRITISH STANDARDBS EN 60076-13:2006BS EN 60076-13:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2006 BSI 2006ISBN 0 580 49651 1Amendments issued since publicationAmd. No

3、. Date Commentscontract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is the UK implementation of EN 60076-13:2006. It is identical with IEC 60076-13

4、:2006.The UK participation in its preparation was entrusted to Technical Committee PEL/14, Power transformers.A list of organizations represented on PEL/14 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a EUROPEAN STANDARD EN

5、60076-13 NORME EUROPENNE EUROPISCHE NORM October 2006 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 2006 CENELEC - All rights

6、of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60076-13:2006 E ICS 29.180 English version Power transformers Part 13: Self-protected liquid-filled transformers (IEC 60076-13:2006) Transformateurs de puissance Partie 13: Transformateurs auto-protgs im

7、mergs dans un liquide dilectrique (CEI 60076-13:2006) Leistungstransformatoren Teil 13: Selbstgeschtzte flssigkeitsgefllte Transformatoren (IEC 60076-13:2006) This European Standard was approved by CENELEC on 2006-09-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations w

8、hich 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 such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This Europe

9、an 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 language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are th

10、e national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, S

11、witzerland and the United Kingdom. Foreword The text of document 14/530/FDIS, future edition 1 of IEC 60076-13, prepared by IEC TC 14, Power transformers, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60076-13 on 2006-09-01. The following dates were fixed: latest d

12、ate by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2007-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2009-09-01 Annex ZA has been added by CENELEC. _ Endorsement

13、notice The text of the International Standard IEC 60076-13:2006 was approved by CENELEC as a European Standard without any modification. _ EN 60076-13:2006 2 3 EN 60076-13:2006 CONTENTS 1 Scope 4 2 Normative references .4 3 Terms and definitions .5 4 Service conditions 5 5 Electrical characteristics

14、 .5 5.1 Rated power5 5.2 Highest voltage for equipment5 5.3 Windings .6 5.4 Tappings .6 5.5 Connection group 6 5.6 Dimensioning of the low-voltage winding neutral connection .6 5.7 Short-circuit impedance .6 5.8 Insulation levels and dielectric tests .6 5.9 Temperature rise limits at rated power .7

15、5.10 Overload capability7 6 Self-protection and disconnection device (SPDD)7 6.1 Functional requirements 7 6.2 Coordination principle7 6.3 Mechanical requirements .8 7 Constructional requirements .8 7.1 Liquid preservation system 8 7.2 Bushings .8 7.3 Dielectric liquid and component materials.8 7.4

16、Disconnection function.8 8 Information to be supplied by the customer .8 9 Information to be supplied by the manufacturer .9 10 Rating plate9 11 Tests9 11.1 List and classification of tests (routine, type and special tests) .9 11.2 Routine tests .9 11.3 Type tests .9 11.4 Short-circuit test with the

17、 self-protection and disconnection device disconnected or bypassed .10 12 Test procedure .11 12.1 Measurement of partial discharges.11 12.2 Transformer pressure test11 12.3 Switching cycle tests .12 12.4 Behaviour test of self-protection and disconnection device .12 Annex ZA (normative) Normative re

18、ferences to international publications with their corresponding European publications18 Figure 1 Partial discharge measurement cycle11 Table 1 Order for tests carried out on prototypes A, B, C, D, E10 EN 60076-13:2006 4 POWER TRANSFORMERS Part 13: Self-protected liquid-filled transformers 1 Scope Th

19、is part of IEC 60076 applies to high-voltage/low-voltage self-protected liquid-filled and naturally cooled transformers for rated power 50 kVA to 1 000 kVA for indoor or outdoor use having a primary winding (high-voltage) with highest voltage for equipment up to 24 kV; secondary winding (low-voltage

20、) with highest voltage for equipment of 1,1 kV. These transformers are equipped with a self-protection and disconnection device to protect the environment, property and people and prevent any disturbance of the high-voltage network from the consequences of an internal transformer fault. Transformers

21、 covered by this standard comply with the relevant requirements prescribed in the IEC 60076 series. The self-protected transformer may be used in conjunction with other devices to provide system coordination and sensitive system protection. The protection system is not designed to be functional when

22、 the power supply is from the low-voltage side. The self-protected transformer is not intended to function in parallel with another transformer. NOTE This standard may be applied to transformers with a higher voltage than 24 kV or other rated power by agreement between the manufacturer and the purch

23、aser. Validation tests should be carried out at the appropriate level. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced

24、document (including any amendments) applies. IEC 60076-1:1993, Power transformers Part 1: General Amendment 1 (1999)1IEC 60076-2, Power transformers Part 2: Temperature rise IEC 60076-3:2000, Power transformers Part 3: Insulation levels, dielectric tests and external clearances in air IEC 60076-5:20

25、00, Power transformers Part 5: Ability to withstand short circuit 1There exists a consolidated edition 2.1 (2000) that includes edition 2 and its amendment. 5 EN 60076-13:2006 IEC 60076-7, Power transformers Part 7: Loading guide for oil-immersed power transformers IEC 60137, Insulated bushings for

26、alternating voltages above 1 000 V IEC 60270, High-voltage test techniques Partial discharge measurements IEC 60282-1, High-voltage fuses Part 1: Current-limiting fuses IEC 60296, Fluids for electrotechnical applications Unused mineral insulating oils for transformers and switchgear IEC 60836, Speci

27、fications for unused silicone insulating liquids for electrotechnical purposes IEC 61099, Specifications for unused synthetic organic esters for electrical purposes 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 self-protection function func

28、tion integrated into the transformer to prevent external consequences (tank rupture, explosion, substance spattering, arcing and disturbances to the power supply networks) resulting from a fault within the transformer 3.2 disconnection function automatic interruption of the connection between high-v

29、oltage terminals and transformer active part by operation of the self-protection and disconnection device The purpose of this function is to eliminate current and voltage on the low-voltage side. 3.3 self-protection and disconnection device SPDD device which has the self-protection function and the

30、disconnection function 4 Service conditions The normal service conditions prescribed in IEC 60076-1 apply. 5 Electrical characteristics 5.1 Rated power The rated power shall comply with 4.3 of IEC 60076-1. 5.2 Highest voltage for equipment The values of the highest voltage for equipment shall be up

31、to 24 kV for the high-voltage winding; 1,1 kV for the low-voltage winding. EN 60076-13:2006 6 5.3 Windings 5.3.1 High-voltage winding These transformers are designed for a single primary voltage. 5.3.2 Low-voltage winding These transformers are designed for a single secondary voltage. 5.4 Tappings T

32、he tapping range shall be limited to 5 % to ensure satisfactory coordination with the self-protection system. The preferred tapping ranges are 0 %; 2,5 %; 5 %. The tap shall be selected by the use of an off-circuit tap switch connected to the high-voltage winding. 5.5 Connection group Connection gro

33、ups shall be Ii0 or Iin0 for single-phase transformers; Yzn or Dyn for transformers up to 160 kVA; Dyn for transformers of 250 kVA to 1 000 kVA. The clock notation figure shall be 1 or 5 or 11 for three-phase transformers; see 3.10.6 of IEC 60076-1. 5.6 Dimensioning of the low-voltage winding neutra

34、l connection The neutral conductor and terminal of the low-voltage winding shall be dimensioned for rated current and fault current (fault between phase and neutral conductor). 5.7 Short-circuit impedance The value of the short-circuit impedance at a reference temperature of 75 C is in accordance wi

35、th 3.2.2.3 of IEC 60076-5. 5.8 Insulation levels and dielectric tests 5.8.1 Low-voltage winding The separate source a.c. withstand voltage is 10 kV. For transformers exposed to higher dielectric stresses like suburban and rural installation transformers, the rated lightning impulse withstand voltage

36、 is 30 kV. NOTE The reason for a higher insulation level is to reduce the risk of faults between the low-voltage side of the transformer and earth. 7 EN 60076-13:2006 5.8.2 High-voltage winding The values of lightning impulse withstand voltage and separate source a.c. withstand voltage shall be as p

37、rescribed in IEC 60076-3, Table 2 or Table 3. The higher of the alternative lightning impulse values shall be chosen in order to withstand the overvoltages arising from the operation of the internal protection system. 5.9 Temperature rise limits at rated power The temperature rise limits shall be as

38、 prescribed in IEC 60076-2. 5.10 Overload capability The self-protection and disconnection device shall not operate under the permitted overload conditions defined in IEC 60076-7. 6 Self-protection and disconnection device (SPDD) 6.1 Functional requirements These transformers are equipped with an in

39、ternal self-protection and disconnection device which, in the case of an internal fault, is designed to prevent external effects; keep the damage within the transformer tank. However, tank distortion as the result of the fault is permitted; prevent ejection of dielectric fluid, material or gas from

40、the inside to the outside of the tank; prevent the propagation of an electric arc from the inside to the outside of the tank; eliminate the fault current in the transformer (disconnection); disconnect only the faulty transformer without tripping the high-voltage feeder. 6.2 Coordination principle Th

41、e manufacturer shall provide information about the characteristics for the high-voltage self-protection and disconnection device to enable the user to verify that the characteristics of the high-voltage upstream network protection have been coordinated to prevent false tripping of the feeder; to ver

42、ify that the characteristics of the low-voltage downstream network protection have been coordinated to prevent false tripping of the transformer. The user shall also ensure that the protection scheme of the low-voltage network is coordinated in order to avoid unintended tripping of the self-protecti

43、on and disconnection device inside the transformer tank. The self-protection and disconnection device inside the transformer tank is neither accessible nor adjustable on site. The curves or data necessary to define the protection system shall be given. Reference numbers shall be reported on the rati

44、ng plate. EN 60076-13:2006 8 6.3 Mechanical requirements The self-protection and disconnection device shall not be triggered by shock or vibration resulting from normal transportation and installation conditions. 7 Constructional requirements 7.1 Liquid preservation system Unless otherwise agreed be

45、tween the manufacturer and the purchaser, the transformers shall be fully filled and hermetically sealed. 7.2 Bushings The high-voltage bushings shall be in accordance with IEC 60137. The transformer and the connection bushings shall withstand stresses and strains of internal and external fault cond

46、itions during the time the self-protection and disconnection function operates; after the time the self-protection and disconnection function operates with the bushings connected to the energized network; during handling, transportation and storage of the transformer. NOTE Special terminal arrangeme

47、nts may be used by agreement between the manufacturer and the purchaser. 7.3 Dielectric liquid and component materials The preferred dielectric liquid is mineral oil in accordance with IEC 60296. Other dielectric liquids such as silicon fluid to IEC 60836 and synthetic esters to IEC 61099 may be use

48、d by agreement between the manufacturer and the purchaser. The materials used in the construction of the transformer shall be compatible with the dielectric liquid. NOTE The use of liquids other than mineral oil may require that specific tests be performed to verify the operational characteristics o

49、f the protection system in this liquid. 7.4 Disconnection function The manufacturer shall state if a three-phase or a two-phase disconnection is provided by the device for the three-phase transformers. 8 Information to be supplied by the customer At the enquiry, to design the self-protection and disconnection device and to ensure its proper tripping, the following information shall be given: the type, value and d