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1、BRITISH STANDARD Confirmed August 1984 BS 5000-11: 1973 Incorporating Amendment Nos. 1, 2, 3 and 4 Specification for Rotating electrical machines of particular types or for particular applications Part 11: Small-power electric motors and generators UDC 621.313.13: 621.313.1.026.443 ? Licensed Copy:
2、sheffieldun sheffieldun, na, Mon Dec 04 12:56:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5000-11:1973 This British Standard, having been approved by the Electrical Industry Standards Committee, was published under the authority of the Executive Board on 13 November 1973 BSI 14 September 2005 F
3、irst published as BS 170 June 1921 First revision June 1939 Second revision July 1962 Third revision as BS 5000-11 November 1973 The following BSI references relate to the work on this British Standard: Committee reference ELE/1/13 Draft for comment 71/27730 ISBN 0 580 07505 2 Co-operating organizat
4、ions The Electrical Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Associated Offices Technical CommitteeDepartment of Trade and Industry Asso
5、ciation of Consulting Engineers*Electric Cable Makers Confederation Association of Manufacturers of DomesticElectrical Contractors Association Electrical Appliances (Incorporated)* Association of Mining ElectricalElectrical Contractors Association of Scotland and Mechanical EngineersElectrical Resea
6、rch Association* Association of Supervisory and Executive Electricity Council, the Central Electricity Engineers* Generating Board and the Area Boards in British Electrical and Allied Manufacturers England and Wales* AssociationElectronic Engineering Association British Electrotechnical Approvals Bo
7、ard for Engineering Equipment Users Association* Household EquipmentInstitution of Electrical Engineers British Radio Equipment Manufacturers Institution of Electrical and Electronics Association Technician Engineers British Railways Board*Lighting Industry Federation Limited British Steel Corporati
8、onMinistry of Defence Crown Agents for Oversea Governments and National Physical Laboratory (Department of Administrations Trade and Industry) Department of Employment (HM factory Oil Companies Materials Association* Inspectorate)Post Office Department of the Environment*South of Scotland Electricit
9、y Board* The Government department and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard. Association of Electrical Machinery TradesMinistr
10、y of Defence (Army Department) Engineer Surveyors AssociationMinistry of Defence (Navy Department) Lloyds Register of ShippingMachine Tool Trades Association London Transport ExecutiveRotating Electrical Machines Association Amendments issued since publication Amd. No.Date of issueComments 2280May 1
11、977 2717August 1978 5634July 1988 15899September 2005Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 12:56:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5000-11:1973 BSI 14 September 2005 i Contents Page Co-operating organizationsInside front cover For
12、ewordiii Section 1. Construction and electrical performance 1Scope 1 2Definitions 1 3General 1 4Ratings 2 5General conditions 3 6Limits of temperature rise and methods of temperature measurement 4 7Momentary overloads 7 8Commutators, brush gear and slip rings 7 9Full load efficiency 8 10Power factor
13、 8 11Tests 8 12Application of tests 9 13Temperature rise tests 9 14Torque tests 9 15Commutation test 9 16High voltage tests 10 17Test certificates 10 18Tolerances on characteristics of machines 10 19Terminal and lead markings 10 20Radio interference 10 21Information to be given on the machine 11 22R
14、ating of capacitors 12 Section 2. Metric dimensions 23Frame designation 13 24Letter symbols 13 25Dimensions, tolerances and limits 13 26Access for flange-fitting bolts 13 27Electric connections 13 Appendix A Notes on the torque characteristics and application of induction motors17 Appendix B Informa
15、tion to be given with enquiry and order 18 Appendix C Terms and definitions 20 Figure 1 Symbols for dimensions of foot-mounted machines without flanges15 Figure 2 Symbols for dimensions of flange-mounted machines and foot-mounted machines provided with a flange15 Publications referred toInside back
16、cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 12:56:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5000-11:1973 ii BSI 14 September 2005 Page Table 1 Limit of permissible temperature rise in C 6 Table 2 Momentary overload for motors 8 Table 3 Test voltages 10 Table 4 Tolerances 11 T
17、able 5 Torque characteristics 17 Table 6 Suffix letters 13 Table 7 Letter symbols to indicate dimensions 14 Table 8 Standard dimensions for foot-mounted or resilient base-mounted machines 16 Table 9 Standards dimensions for flange-mounted machines 16 Licensed Copy: sheffieldun sheffieldun, na, Mon D
18、ec 04 12:56:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5000-11:1973 BSI 14 September 2005 iii Foreword This British Standard revises and supersedes the 1962 edition of BS 170 and supersedes BS 2048-1:1961, which is withdrawn. It is primarily intended to cover light type single-phase electric m
19、otors but may also be used for 3-phase or d.c. machines, particularly where mechanical interchangeability of machines suitable for different supplies is of importance. Text deleted This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its
20、correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 21 and a back cover. The BSI copyright notice displayed in this document indicat
21、es when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 12:56:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 12:56:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5000-11:1973 BSI 14 September 2005 1
22、 Section 1. Construction and electrical performance 1 Scope Section 1 of this British Standard specifies the performance of a.c., d.c. and universal rotating electrical machines of any continuous rated output up to and including 0.75 kW or kVA per 1 000 rev/min (synchronous speed for induction machi
23、nes), and rated voltages up to 250 V d.c. or single-phase a.c., and up to 650 V three-phase a.c. It also applies to short-time rated machines having an equivalent continuous rating to the above. It is primarily intended to cover light type single-phase electric motors but may also be used for three-
24、phase of d.c. machines, particularly where mechanical interchangeability of machines suitable for different supplies is of importance. Section 2 specifies a range of metric dimensions affecting interchangeability. These dimensions are optional whereas the requirements of Section 1 are mandatory. It
25、is therefore important when enquiring or ordering to state whether the machine is to comply with the dimensional requirements of Section 2 in addition to the constructional and electrical performance requirements of Section 1. It is primarily intended to cover light type single-phase electric motors
26、 but may also be used for three-phase or d.c. machines, particularly where mechanical interchangeability of machines suitable for different supplies is of importance. NOTE 1 It is recognized that in practice there is some overlap between this standard and BS EN 50347 and that therefore certain ratin
27、gs of machines may be constructed to comply with either one or the other but not necessarily with both. NOTE 2 The titles of the publications referred to are listed on the inside back cover. 2 Definitions For the purposes of this British Standard the definitions given in Appendix C apply. 3 General
28、3.1 Types of machine The principal types of machine covered by this standard are: 3.2 Degrees of protection by enclosure Types of protective enclosure selected from BS EN 60034-5 are:1) 1) Single-phase a.c. machines split-phase capacitor start, induction run capacitor start, capacitor run (two value
29、 capacitor) capacitor start and run (single value capacitor permanently in circuit) shaded pole series commutator 2) Polyphase a.c. machines cage induction 3) D.C. machines compound shunt series separately excited 4) A.C./D.C. machines universal series commutator 1)For some types of totally enclosed
30、 machine it may be necessary for Category IP 54 to be used. (IP 00)open or non-protected(IP 45)hose proof (IP 20)protected(IPW 44)weather proof1) (IP 22)drip proof(IP 58)submersible (IP 44)totally enclosed1)(BS EN 60079-7)flameproof Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 12:56:30 GMT
31、+00:00 2006, Uncontrolled Copy, (c) BSI BS 5000-11:1973 2 BSI 14 September 2005 Section 1 3.3 Methods of cooling Methods of cooling selected from BS EN 60034-6 are:2) 3.4 Dimensions A machine complying with the requirements of this specification is not restricted as to dimensions. If, however, one o
32、f the standard frame sizes specified in Clauses 23 to 27 is quoted on the nameplate then the machine shall comply with all the dimensional requirements of those clauses for the particular size of machine and method of mounting. 3.5 Information to be given with enquiry and order The information to be
33、 supplied by the purchaser with his enquiry or order is given in Appendix B. 4 Ratings 4.1 General The assignment of rating shall be made by the manufacturer to indicate the capabilities of the machine and marked on the rating plate3) in accordance with Clause 21. Since electrical machines have a ti
34、me-rate of temperature rise, and since the rise of temperature in accordance with this standard is limited, a qualifying term shall be included in the rating to give an indication of the duration for which the machine may run at the assigned values while complying with this standard. Where a machine
35、 is manufactured for general purposes, it shall be capable of supplying its rating indefinitely and the qualifying terms shall signify this. 4.2 Classes of rating In assigning the rating, the manufacturer shall select one of the following rating classes: 1) Continuous rating (CR): A statement of the
36、 load and conditions, assigned to the machines by the manufacturer, at which the machine may be operated for an unlimited period while complying with the requirements of this standard. 2) Short-time rating (STR): A statement of the load time and conditions, assigned to the machine by the manufacture
37、r, at which the machine may be operated for a limited period, starting at the ambient temperature, while complying with the requirements of this standard. The preferred times for short-time ratings are 5, 10, 15, 30 and 60 minutes. The value of short-time shall be marked on the rating plate. 4.3 Out
38、put ratings 4.3.1 D.C. generators. The rated output of d.c. generators shall be expressed in watts (W)4). 4.3.2 A.C. generators. The rated output of a.c. generators shall be either the apparent electric power expressed in volt amperes (VA)4) together with the power factor; or the real power expresse
39、d in watts (W)4). 4.3.3 Motors. The rated output available at the motor shaft shall be expressed in watts (W)4). 4.4 Motors for multiple ratings 4.4.1 Multi-speed motors. For multi-speed motors, a definite rating shall be assigned for each speed. 2)Such machines are used for driving fans, the air fr
40、om which is drawn over the frame, thus cooling it. IC 00free convection IC 01self ventilated IC 00 41totally enclosed free convection IC 01 41totally enclosed fan ventilated IC 08drip proof, air over motor2) IC 08 41totally enclosed, air over motor2) 3)When the motors are used for driving fans and a
41、re mounted in the air-stream, the output rating should be agreed between the manufacturer and the purchaser. The letter symbols A.O.M. (air over motor) should be added to the rating referred to on the rating plate. 4)Large outputs may be expressed in kW or kVA. Licensed Copy: sheffieldun sheffieldun
42、, na, Mon Dec 04 12:56:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5000-11:1973 BSI 14 September 2005 3 Section 1 4.4.2 Variable-speed motors. For variable-speed motors, definite ratings shall be assigned for the highest and lowest speed of the range specified. If ratings at intermediate speeds
43、 are important they shall be specified. 4.5 Voltage ratings 4.5.1 Rated voltage. The rated voltage is the voltage between the line terminals of the machine at rated output. 4.5.2 Generators rated for specified operation over a limited range of voltage. The requirements for a.c. and d.c. generators a
44、re described separately below. 4.5.2.1 D.C. generators. For d.c. generators rated to run over a limited range5) of voltage the rated output and current shall relate to the highest voltage of the range, unless otherwise specified. 4.5.2.2 A.C. generators. For a.c. generators rated to operate over a l
45、imited range5) of voltage the rated output and power factor shall relate to any voltage within the range unless otherwise specified. 4.5.3 Motors rated for specified operation over a limited range of voltage. The requirements for a.c. and d.c. motors are specified separately below. 4.5.3.1 D.C. moto
46、rs. For d.c. motors rated to operate over a limited range5) of voltage, the rated output shall relate to the mean voltage of the range unless otherwise specified. 4.5.3.2 A.C. motors. For a.c. motors rated to operate over a limited range5) of voltage, the rated output shall relate to the mean voltag
47、e in the range. 5 General conditions 5.1 Preferred voltages The preferred voltages are: 5.2 Preferred frequency The preferred frequency for alternating current machines is 50 Hz. 5.3 Preferred number of phases for alternating current machines The preferred number of phases for alternating current ma
48、chines is either one or three. 5.4 Machines for non-preferred voltages, frequency and number of phases Machines for use on systems employing voltages, frequencies and phases other than those specified in 5.1, 5.2 and 5.3, but which comply in all other respects with the requirements of this standard,
49、 come within the scope of this standard. 5.5 Waveform (a.c. machines) The voltage waveform of an a.c. generator shall be virtually sinusoidal. NOTE Where the waveform is of importance the deviation from a true sine wave and the load at which this should occur should be the subject of agreement between the manufacturer and the purchaser. A.C. motors shall be capable of working on a supply having a waveform which is virtually sinusoidal. NOTE Where the waveform is not sinusoida
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