1、BRITISH STANDARD BS EN 60034-12:2002 Incorporating amendment no. 1 Rotating electrical machines Part 12: Starting performance of single-speed three-phase cage induction motors The European Standard EN 60034-12:2002, incorporating amendment A1:2007, has the status of a British Standard ICS 29.160.30
2、BS EN 60034-12:2002 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 12 June 2002 BSI 2007 ISBN 978 0 580 60624 3 National foreword This British Standard is the UK implementation of EN 60034-12:2002, incorporating amendment A1:2007. It is iden
3、tical with IEC 60034-12:2002, incorporating amendment 1:2007. It supersedes BS EN 60034-12:1996 which is withdrawn. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Tags indicating changes to IEC text carry the number of the IEC amendment. For exam
4、ple, text altered by IEC amendment 1 is indicated by !“. The UK participation in its preparation was entrusted to Technical Committee PEL/2, Rotating electrical machinery. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not pur
5、port 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 issued since publication Amd. No. Date Comments 17461 31 October 2007 See national forewordEUROP
6、EAN STANDARD EN 60034-12 NORME EUROPENNE EUROPISCHE NORM May 2002 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 2002 CENELEC -
7、 All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60034-12:2002 E ICS 29.160.30 Supersedes EN 60034-12:1995 + A2:1995 + A11:1999 English version Rotating electrical machines Part 12: Starting performance of single-speed three-phase cage indu
8、ction motors (IEC 60034-12:2002) Machines lectriques tournantes Partie 12: Caractristiques de dmarrage des moteurs triphass induction cage une seule vitesse (CEI 60034-12:2002) Drehende elektrische Maschinen Teil 12: Anlaufverhalten von Drehstrommotoren mit Kfiglufer ausgenommen polumschaltbare Moto
9、ren (IEC 60034-12:2002) This European Standard was approved by CENELEC on 2002-05-01. 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 li
10、sts and bibliographical references concerning such 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
11、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 the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland
12、, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. September 2007 +A1Foreword The text of document 2/1187/FDIS, future edition 2 of IEC 60034-12, prepared by IEC TC 2, Rotating machinery, was submitted to the IEC-CENELEC parallel vote and was ap
13、proved by CENELEC as EN 60034-12 on 2002-05-01. This European Standard supersedes EN 60034-12:1995 + A2:1995 + A11:1999. 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) 2003-0
14、2-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2005-05-01 Annexes designated “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the Intern
15、ational Standard IEC 60034-12:2002 was approved by CENELEC as a European Standard without any modification. _ Page2 EN6003412:2002 Foreword to amendment A1 The text of document 2/1433/FDIS, future amendment 1 to IEC 60034-12:2002, prepared by IEC TC 2, Rotating machinery, was submitted to the IEC-CE
16、NELEC parallel vote and was approved by CENELEC as amendment A1 to EN 60034-12:2002 on 2007-09-01. The following dates were fixed: latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2008-06-01 latest dat
17、e by which the national standards conflicting with the amendment have to be withdrawn (dow) 2010-09-01 _ Endorsement notice The text of amendment 1:2007 to the International Standard IEC 60034-12:2002 was approved by CENELEC as an amendment to the European Standard without any modification. _ BSI 20
18、07CONTENTS 1 Scope.4 2 Normative references .4 3 Definitions 5 4 Symbols .5 5 Designation 6 5.1 General .6 5.2 Design N .6 5.3 Design NY.6 5.4 Design H .6 5.5 Design HY.6 6 Design N requirements .6 6.1 Torque characteristics .6 6.2 Locked rotor apparent power.6 6.3 Starting requirements 7 7 Design N
19、Y starting requirements 7 8 Design H requirements .7 8.1 Starting torque 7 8.2 Locked rotor apparent power.7 8.3 Starting requirements 7 9 for motors with type of protection e11 Table 7 External inertia (J) for motors with type of protection e.11 Annex ZA (normative) Normative references to internat
20、ional publications with their corresponding European publications .12 Page3 EN6003412:2002 BSI 2007 Design HY starting requirements8 Table 1 Minimum values of torques for design N 8 Table 2 Maximum values of locked rotor apparent power for designs N and H8 Table 3 External inertia (J).9 Table 4 Mini
21、mum values of torques for design H10 Table 5 Minimum values of torques for design N-e motors with type of Table 6 Maximum values of locked rotor apparent power protection e increased safety.10ROTATING ELECTRICAL MACHINES Part 12: Starting performance of single-speed three-phase cage induction motors
22、 1 Scope This International standard specifies the parameters for four designs of starting performance of single-speed three-phase 50 Hz or 60 Hz cage induction motors in accordance with IEC 60034-1 that: have a rated voltage up to 1 000 V; are intended for direct-on-line or star-delta starting; are
23、 rated on the basis of duty type S1; are constructed to any degree of protection. The standard also applies to dual voltage motors provided that the flux saturation level is the same for both voltages and to motors having type of protection e increased safety with temperature classes T1 to T3 comply
24、ing with IEC 60079-0 and IEC 60079-7 NOTE 1 It is not expected that all manufacturers will produce machines for all four designs. The selection of any specific design in accordance with this standard will be a matter of agreement between the manufacturer and the purchaser. NOTE 2 Designs other than
25、the four specified may be necessary for particular applications. NOTE 3 The values of torque and apparent power given in this standard are limiting values (that is, minimum or maximum without tolerance), but it should be noted that values given in manufacturers catalogues may include tolerances in a
26、ccordance with IEC 60034-1. NOTE 4 The values tabled for locked rotor apparent power are based on r.m.s. symmetrical steady state locked rotor currents; at motor switch on there will be a one-half cycle asymmetrical instantaneous peak current which may range from 1,8 to 2,8 times the steady state va
27、lue. The current peak and decay time are a function of the motor design and switching angle. 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 edit
28、ion of the referenced document (including any amendments) applies. IEC 60034-1, Rotating electrical machines Part 1: Rating and performance IEC 60079-0, Electrical apparatus for explosive gas atmospheres Part 0: General requirements IEC 60079-7, Electrical apparatus for explosive gas atmospheres Par
29、t 7: Increased safety e Page4 EN6003412:2002 BSI 20073 Definitions For the purposes of this part of IEC 60034, the following definitions apply. 3.1 rated torque (T N ) the torque the motor develops at its shaft end at rated output and speed IEV 411-48-05 3.2 locked-rotor torque (T l ) the smallest m
30、easured torque the motor develops at its shaft end with the rotor locked, over all its angular positions, at rated voltage and frequency IEV 411-48-06 3.3 pull-up torque (T u ) the smallest steady-state asynchronous torque which the motor develops between zero speed and the speed which corresponds t
31、o the breakdown torque, when the motor is supplied at the rated voltage and frequency. This definition does not apply to those motors of which the torque continually decreases with increase in speed. NOTE In addition to the steady-state asynchronous torques, harmonic synchronous torques, which are a
32、 function of rotor load angle, will be present at specific speeds. At such speeds, the accelerating torque may be negative for some rotor load angles. Experience and calculation show this to be an unstable operating condition and therefore harmonic synchronous torques do not prevent motor accelerati
33、on and are excluded from this definition. 3.4 breakdown torque (T b ) the maximum steady-state asynchronous torque which the motor develops without an abrupt drop in speed, when the motor is supplied at the rated voltage and frequency. This definition does not apply to those motors of which the torq
34、ue continually decreases with increase in speed. 3.5 rated output (P N ) the value of the output included in the rating 3.6 locked rotor apparent power (S l ) the apparent power input with the motor held at rest at rated voltage and frequency 4 Symbols Symbol Quantity J External inertia p Number of
35、pole pairs P N Rated output S l Locked rotor apparent power T N Rated torque T l Locked rotor torque T u Pull-up torque T b Breakdown torque Page5 EN6003412:2002 BSI 20075 Designation 5.1 General Motors designed according to this standard are classified according to subclauses 5.2 to 5.5. 5.2 Design
36、 N Normal starting torque three-phase cage induction motors intended for direct-on-line starting, having 2, 4, 6 or 8 poles and rated from 0,4 kW to 1 600 kW. 5.3 Design NY Motors similar to design N, but intended for star-delta starting. For these motors in star- connection, minimum values for T la
37、nd T uare 25 % of the values of design N, see table 1. 5.4 Design H High starting torque three-phase cage induction motors with 4, 6 or 8 poles, intended for direct-online starting, and rated from 0,4 kW to 160 kW at a frequency of 60 Hz. 5.5 Design HY Motors similar to design H but intended for sta
38、r-delta starting. For these motors in star- connection, minimum values for T land T uare 25 % of the values of design H, see table 4. 6 Design N requirements 6.1 Torque characteristics The starting torque is represented by three characteristic features. These features shall be in accordance with the
39、 appropriate values given in table 1 or table 5. The values in table 1 and table 5 are minimum values at rated voltage. Higher values are allowed. The motor torque at any speed between zero and that at which breakdown torque occurs shall be not less than 1,3 times the torque obtained from a curve va
40、rying as the square of the speed and being equal to rated torque at rated speed. However, for 2-pole motors with type of protection e increased safety having a rated output greater than 100 kW, the motor torque at any speed between zero and that at which breakdown torque occurs shall not be less tha
41、n 1,3 times the torque obtained from a curve varying as the square of the speed and being equal to 70 % rated torque at rated speed. For motors with type of protection e, the three characteristic torques shall be in accordance with the appropriate values given in table 5 NOTE The factor 1,3 has been
42、 chosen with regard to an undervoltage of 10 % in relation to the rated voltage at the motor terminals during the acceleration period. 6.2 Locked rotor apparent power The locked rotor apparent power shall be not greater than the appropriate value given in table 2 or table 6. The values given in tabl
43、e 2 and table 6 are independent of the number of poles and are maximum values at rated voltage. For motors with type of protection e, locked rotor apparent power shall be in accordance with the appropriate values given in table 6 Page6 EN6003412:2002 BSI 20076.3 Starting requirements Motors shall be
44、 capable of withstanding two starts in succession (coasting to rest between starts) from cold conditions and one start from hot after running at rated conditions. The retarding torque due to the driven load will be in each case proportional to the square of the speed and equal to the rated torque at
45、 rated speed with the external inertia given in table 3 or table 7. In each case, a further start is permissible only if the motor temperature before starting does not exceed the steady temperature at rated load. However, for 2-pole motors with type of protection e increased safety having a rated ou
46、tput greater than 100 kW, the retarding torque due to the driven load is proportional to the square of the speed and equal to 70 % rated torque at rated speed, with the external inertia given in table 7. After this starting, load with rated torque is possible. NOTE It should be recognized that the n
47、umber of starts should be minimized since these affect the life of the motor. 7 Design NY starting requirements The starting requirements are as for design N. In addition, however, a reduced retarding torque is necessary as the starting torque in star connection may be insufficient to accelerate som
48、e loads to an acceptable speed. NOTE It should be recognized that the number of starts should be minimized since these affect the life of the motor. 8 Design H requirements 8.1 Starting torque The starting torque is represented by three characteristic features. These featurest shall be in accordance
49、 with the appropriate values given in table 4. These values are minimum values at rated voltage. Higher values are allowed. 8.2 Locked rotor apparent power The locked rotor apparent power shall be not greater than the appropriate value given in table 2. The values in table 2 are independent of the number of poles and are maximum values at rated voltage
