BS 5000-11:1973 (R12):2005 Edition
$142.49
Specification for rotating electrical machines of particular types or for particular applications – Small-power electric motors and generators
| Published By | Publication Date | Number of Pages |
| BSI | 2005 | 28 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | Co-operating organizations |
| 3 | Contents |
| 7 | Construction and electrical performance 1 Scope 2 Definitions 3 General 3.1 Types of machine 3.2 Degrees of protection by enclosure |
| 8 | 3.3 Methods of cooling 3.4 Dimensions 3.5 Information to be given with enquiry and order 4 Ratings 4.1 General 4.2 Classes of rating 4.3 Output ratings 4.4 Motors for multiple ratings |
| 9 | 4.5 Voltage ratings 5 General conditions 5.1 Preferred voltages 5.2 Preferred frequency 5.3 Preferred number of phases for alternating current machines 5.4 Machines for non-preferred voltages, frequency and number of phases 5.5 Waveform (a.c. machines) |
| 10 | 5.6 Preferred outputs 5.7 Preferred speeds 6 Limits of temperature rise and methods of temperature measurement 6.1 Limits of temperature rise 6.2 Methods of temperature measurement |
| 11 | 6.3 Corrections of temperature rise for variations in cooling air temperature |
| 12 | Limit of permissible temperature rise in °C |
| 13 | 6.4 Correction of temperature rise for variations in altitude 7 Momentary overloads 7.1 Momentary overload for generators 7.2 Momentary overload for motors 8 Commutators, brush gear and slip rings |
| 14 | Momentary overload for motors 9 Full load efficiency 10 Power factor 11 Tests 11.1 General 11.2 Performance tests |
| 15 | 11.3 Type tests 11.4 Routine tests 12 Application of tests 13 Temperature rise tests 13.1 General 13.2 Initial temperature of a machine having a short-time rating 13.3 Duration of temperature rise test 13.4 Temperature rise test for machines designed to operate over a voltage range 13.5 Temperature rise test for machines having more than one rating 14 Torque tests 15 Commutation test |
| 16 | 16 High voltage tests 16.1 General 16.2 Performance and type tests 16.3 Routine test Test voltages 16.4 High voltage tests on assembled apparatus 17 Test certificates 18 Tolerances on characteristics of machines 19 Terminal and lead markings 20 Radio interference |
| 17 | Tolerances 21 Information to be given on the machine |
| 18 | 22 Rating of capacitors |
| 19 | Metric dimensions 23 Frame designation Suffix letters 24 Letter symbols 25 Dimensions, tolerances and limits 26 Access for flange-fitting bolts 27 Electric connections |
| 20 | Letter symbols to indicate dimensions |
| 21 | Symbols for dimensions of foot-mounted machines without flanges Symbols for dimensions of flange-mounted machines and foot-mounted machines provided with a flange |
| 22 | Standard dimensions for foot-mounted or resilient base-mounted machines Standards dimensions for flange-mounted machines |
| 23 | Notes on the torque characteristics and application of induction motors Notes on the torque characteristics and application of induction motors This appendix on torque characteristics is intended to serve only as a guide to generally accepted practice in regard to small-power induction motors. These motors are generally available with torque characteristics as shown in Table 5, expressed as per Torque characteristics Motor applications Split-phase Capacitor start induction run11). These motors, having higher locked rotor torques and lower locked rotor currents than split-phase motors, are generally more suitable for loads of higher inertia and more frequent starting. Capacitor start, capacitor run11). These motors have characteristics similar to those covered by A.2.2 but are more suitable for use when a greater degree of quietness or a higher efficiency and power factor are desirable. Capacitor start and run. These motors are for use where low locked rotor torques are acceptable. They are also generally quieter than split-phase or capacitor start induction run motors. Shaded pole. These motors are suitable for all applications where only a very low locked rotor torque is required and motor efficiency is unimportant. Polyphase. Polyphase motors will generally satisfy all requirements which are met by single-phase machines of similar torque ratings. |
| 24 | Information to be given with enquiry and order Information to be given with enquiry and order When enquiring about, or ordering, an electrical machine to be rated in accordance with this standard, the general particulars listed in B.1.1 should be supplied. General. The following general information should be supplied: Additional information applicable to motors. The following information should be furnished in addition to that specified in B.1.1: |
| 25 | Additional information applicable to generators. The following information should be supplied for generators: |
| 26 | Terms and definitions Terms and definitions |
