BS 5000-11(1973) : 1973

Co-operating organizations
Foreword
Specification
1 Scope
Section 1. Construction and electrical performance
2 Definitions
3 General
4 Ratings
5 General conditions
6 Limits of temperature rise and methods of
    temperature measurement
7 Momentary overloads
8 Commutators, brush gear and slip rings
9 Full load efficiency
10 Power factor
11 Tests
12 Application of tests
13 Temperature rise tests
14 Torque tests
15 Commutation tests
16 High voltage tests
17 Test certificates
18 Tolerances on characteristics of machines
19 Terminal and lead markings
20 Radio interference
21 Information to be given on the machine
22 Ratings of capacitors
Section 2. Metric dimensions
23 Frame designation
24 Letter symbols
25 Dimensions, tolerances and limits
26 Access for flange-fitting bolts
27 Electrical connections
Appendix
A Notes on the torque characteristics and application
    of induction motors
B Information to be given with enquiry and order
C Terms and definitions
Figures
Tables
Publications referred to

Section one describes 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 1000 rev/min, and rated voltages up to 250 V d.c. or single-phase a.c., and up to 650 V three- phase a.c. It applies to short-time rated machines having an equivalent continuous rating to the above. It is intended to cover light single-phase electric motors and three-phase d.c. machines, particularly where mechanical interchangeability of machines is of importance. Section two defines a range of optional metric dimensions affecting interchangeability.