EN 60584-3-2008 en Thermocouples - Part 3 Extension and compensating cables - Tolerances and identification system《热电偶 第3部分 外延和补偿缆线 公差和鉴定体系［替代 CENELEC HD 446 3 S1］》.pdf

1、BRITISH STANDARDBS EN 60584-3:2008Thermocouples Part 3: Extension and compensating cables Tolerances and identification systemICS 17.200.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g

2、3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 60584-3:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2008 BSI 2008ISBN 978 0 580 54650 1National forewordThis British Standard is the UK implementation of EN 60584-3:2008. It is ide

3、ntical to IEC 60584-3:2007. It supersedes BS 4937-30:1993 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee GEL/65, Measurement and control, to Subcommittee GEL/65/2, Elements of systems.A list of organizations represented on this committee can be obtain

4、ed on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publicationDa

5、te CommentsEUROPEAN STANDARD EN 60584-3 NORME EUROPENNE EUROPISCHE NORM January 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brus

6、sels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60584-3:2008 E ICS 17.200.20 Supersedes HD 446.3 S1:1993English version Thermocouples - Part 3: Extension and compensating cables - Tolerances and identification system (IE

7、C 60584-3:2007) Couples thermolectriques - Partie 3: Cbles dextension et de compensation - Tolrances et systme didentification (CEI 60584-3:2007) Thermopaare - Teil 3: Thermoleitungen und Ausgleichsleitungen - Grenzabweichungen und Kennzeichnungssystem (IEC 60584-3:2007) This European Standard was a

8、pproved by CENELEC on 2007-12-01. 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 such n

9、ational 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 lang

10、uage and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lat

11、via, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 60584-3:2008 Foreword The text of document 65B/642/FDIS, future edition 2 of IEC 60584-3, prepared by SC 65B, Devices and process analysis,

12、 of IEC TC 65, Industrial-process measurement, control and automation, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60584-3 on 2007-12-01. This European Standard supersedes HD 446.3 S1:1993. The main technical changes with regard to HD 446.3 S1:1993 are as follows

13、: addition of Subclause 5.4 Connectors; addition of Clauses 7 Dimensions and 8 Requirements. 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) 2008-09-01 latest date by which th

14、e national standards conflicting with the EN have to be withdrawn (dow) 2010-12-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60584-3:2007 was approved by CENELEC as a European Standard without any modification. _ 2 THERMOCOUPLES Part 3: Exten

15、sion and compensating cables Tolerances and identification system 1 Scope This part of IEC 60584 specifies manufacturing tolerances for extension and compensating cables (other than mineral insulated cables) provided directly to users of industrial processes. These tolerances are determined with res

16、pect to the e.m.f.-temperature relationship of Part 1 of the standard. The method for identification of insulated thermocouple extension and compensating cables other than mineral insulated cables is described. Furthermore, requirements for extension and compensating cables for use in industrial pro

17、- cess control are specified. 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 document (including any amendments) appli

18、es. IEC 60584-1:1995, Thermocouples Part 1: Reference tables 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 extension and compensating cables are used for the electrical connection between the open ends of a thermocouple and the ref-erence j

19、unction in those installations where the conductors of the thermocouple are not di-rectly connected to the reference junction. The thermoelectric properties of extension and compensating cables shall be close to the properties of the corresponding thermocouple. 3.1.1 extension cables are manufacture

20、d from conductors having the same nominal composition as those of the cor-responding thermocouple. They are designated by the letter “X“ following the designation of the thermocouple, for example “JX“. 3.1.2 compensating cables are manufactured from conductors having a composition different from the

21、 corresponding thermocouple. They are designated by the letter “C“ following the designation of the thermo-couple, for example “KC“. In some cases different tolerances apply for the same thermocou-ple type over different temperature ranges. These are distinguished by additional letters such as, for

22、example, KCA and KCB. 3 EN 60584-3:20083.2 tolerance the tolerance of an extension or compensating cable is the maximum additional deviation in microvolts caused by the introduction of the extension or compensating cable into the meas-uring circuit. 4 Tolerance values Table 1 shows the specified tol

23、erance for extension and compensating cables when used at temperatures within the ranges indicated as “Cable temperature range“. Table 1 Tolerance classes for extension and compensating cables Tolerance class Type 1 2 Cable temperature range Measuring junctiontemperature JX 85 V (1,5 C) 140 V (2,5 C

24、) 25 C to +200 C 500 C TX 30 V (0,5 C) 60 V (1,0 C) 25 C to +100 C 300 C EX 120 V (1,5 C) 200 V (2,5 C) 25 C to +200 C 500 C KX 60 V (1,5 C) 100 V (2,5 C) 25 C to +200 C 900 C NX 60 V (1,5 C) 100 V (2,5 C) 25 C to +200 C 900 C KCA 100 V (2,5 C) 0 C to +150 C 900 C KCB 100 V (2,5 C) 0 C to +100 C 900

25、 C NC 100 V (2,5 C) 0 C to +150 C 900 C RCA 30 V (2,5 C) 0 C to +100 C 1 000 C RCB 60 V (5,0 C) 0 C to +200 C 1 000 C SCA 30 V (2,5 C) 0 C to +100 C 1 000 C SCB 60 V (5,0 C) 0 C to +200 C 1 000 C NOTE 1 Cable temperature range may be restricted to figures lower than those shown in the table because

26、of temperature limitations imposed by the insulant. NOTE 2 A cable comprising two copper conductors may be used with Type B thermocouples. The expected maximum additional deviation within the cable temperature range 0 C to +100 C is 40 V. The equivalent in temperature is 3,5 C when the measuring jun

27、ction of the thermocouple is at 1 400 C. NOTE 3 Tolerances are specified in microvolts. The table also includes, in parentheses, the approximate equivalent tolerances in degrees Celsius. Because thermocouple e.m.f.-temperature relationships are non-linear, the tolerance in degrees Celsius depends on

28、 the temperature of the measuring junction of the thermo-couple. The figures shown in the table are those appropriate to the measuring junction temperatures in the final column. In most cases the error expressed in degrees Celsius will be larger at lower thermocouple junction temperatures. 5 Colour

29、coding 5.1 Negative conductor The insulation of the negative conductor shall be WHITE for all thermocouple types. 5.2 Positive conductor The insulation of the positive conductor shall be as given in Table 2. 5.3 Outer sheath The outer sheath, if any, shall be coloured as given in Table 2. If for int

30、rinsically safe circuits the outer sheath is coloured BLUE, then the thermocouple type shall be indicated by other means, for instance by printed or coloured tags (colour as given in Table 2). 4 EN 60584-3:2008Table 2 Colour code for extension and compensating cables Thermocouple type Colour of posi

31、tive conductor and sheath insulation T Brown E Violet J Black K Green N Pink B GreyR Orange S Orange 5.4 Connectors The connectors, if any, used in conjunction with thermocouples and compensating or exten-sion cables, shall be coloured as given in Table 2. The colouring may be a mass colouring or a

32、coloured dot on the connectors surface. 6 Additional identification 6.1 Information applied by the manufacturer shall have the following format: Example: IEC K X 1 IEC Tolerance class (1 or 2) Type of cable (X, CA, CB) Type of thermocouple (T,E,J,K,N,R,S) IEC Code 6.2 Additional markings for number

33、of pairs, cross-section of conductors, temperature range, manufacturer, etc., may be made if necessary. 7 Dimensions The dimensions of conductors should be agreed between user and manufacturer taking into account for example tensile strength and flexibility of the cable. Tables 3a and 3b show typi-c

34、al examples of nominal dimensions. 5 EN 60584-3:2008Table 3a Dimensions of conductors (typical nominal values) Solid wire diameter and wire diameter of strands mm 0,10 0,12 0,18 0,20 0,30 0,32 0,40 0,45 0,50 0,60 0,63 0,65 0,80 1,00 1,25 1,29 1,38 1,60 Table 3b Cross-sectional area and construction

35、of stranded conductors Stranded wire nominal cross-sectional area mm2Construction (number of strands * diameter in mm) 0,05 7 * 0,10 0,11 12 * 0,12 0,22 7 * 0,20 3 * 0,30 0,38 12 * 0,20 0,41 13 * 0,20 0,50 16 * 0,20 7 * 0,30 0,60 19 * 0,20 0,72 23 * 0,20 0,75 24 * 0,20 11 * 0,30 1,00 32 * 0,20 14 *

36、0,30 5 * 0,50 3 * 0,65 6 EN 60584-3:2008Table 3b (continued) Stranded wire nominal cross-sectional area mm2Construction (number of strands * diameter in mm) 1,20 7 * 0,45 4 * 0,60 1,25 4 * 0,63 1,30 4 * 0,65 1,50 48 * 0,20 21 * 0,30 3 * 0,80 2,00 16 * 0,40 7 * 0,60 2,2 7 * 0,63 2,3 7 * 0,65 8 Requir

37、ements 8.1 Materials 8.1.1 Insulating materials The choice of insulating materials has to be agreed between vendor and user. 8.1.2 Conductor materials For the cable temperature range the thermal e.m.f. of conductor materials shall comply both with IEC 60584-1 and with the tolerances specified in Cla

38、use 4 of this standard. 8.2 Electromagnetic shielding The cables shall be manufactured by using pairs of twisted conductors or flat parallel conduc-tors. Additional shielding should be used for thermoelectric circuit in order to reduce the sus-ceptibility to electrical noise. 8.3 Capacitance and ind

39、uctance The capacitance and inductance - both per metre - (conductors against conductors and con-ductors against shield - if present) shall be made available. 8.4 Resistance of single conductors and loop resistance The nominal value of the resistance of single conductors in /m at (20 5) C shall be d

40、e-clared by the manufacturer and the nominal loop resistance in /m at (20 5) C shall be made available. 8.5 Insulation resistance The minimum insulation resistance shall be 5 Mkm ( 5103Mm = 5109m) for cables with fibrous insulation and 500 Mkm (0,5106Mm) for all other cables within the scope of this

41、 standard. NOTE The total electrical requirements of the system may take precedence over this specification. 7 EN 60584-3:2008The insulation resistance shall be measured between each conductor and all others and shield combined at (500 50) V DC and a temperature of (20 15) C and a relative humidity

42、of 45 % to 85 %. 8.6 Dielectric strength A voltage of 500 V AC shall be applied for 1 min each time at ambient conditions between: a) each conductor separately and all others connected together, b) all conductors and the shielding. No breakdown shall occur during this test. 8.7 Marking Each coil or

43、drum shall be fitted with a nameplate with the following information, if applicable: traceable identification number, thermocouple type and tolerance class, length in m, diameter or cross-sectional area of one conductor in mm or mm2, number of pairs (if multi-pair), insulating material. Some or all

44、of this information may be in code form. _ 8 EN 60584-3:2008EN 60854-3:2008 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document. For dated refe

45、rences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title E

46、N/HD YearIEC 60584-1 1995 Thermocouples - Part 1: Reference tables EN 60584-1 1995 9 BS EN 60584-3:2008BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europ

47、e and at the international level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions.It is the constant aim of BSI to improve the quality of our products

48、and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.BSI of

49、fers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards.Buying standardsOrders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 8996 7001.