BS 2613:1957

Co-operating organizations
Foreword
SECTION ONE - GENERAL
1 Scope
2 Definitions
SECTION TWO - CLASSIFICATION OF TYPES OF ENCLOSURE
3 Letter symbols
4 Types of enclosure
SECTION THREE - STANDARD; VOLTAGES, FREQUENCY, NUMBER
OF PHASES AND WAVE-FORM
5 Standard voltages
6 Standard frequency
7 Standard number of phases for alternating-current
   machines
8 Machines for non-standard voltages, frequencies
   and number of phases
9 Voltage waveform of synchronous machines
SECTION FOUR - PREFERRED HORSEPOWERS AND SPEEDS FOR D.C.
MOTORS AND A.C. INDUCTTON MOTORS
10 Preferred horse-powers
11 Preferred speeds
SECTION FIVE - RATING
12 Rating
SECTION SIX - LIMITS OF TEMPERATURE-RISE,
TEMPERATURES OF COOLING MEDIUM AND ALTITUDE
13 Limits of permissible temperature-rise
14 Temperature of cooling medium for
   machines dependent on air cooling
15 Temperature of cooling medium for
   machines dependent on liquid cooling
16 Temperature of cooling medium for
   direct-driven steam or gas turbine type
   a.c. generators
17 Altitude
SECTION SEVEN - OVERLOADS
18 Momentary overloads
SECTION EIGHT - COMMUTATION
19 Commutation of d.c. machines and a.c
   commentator motors excluding those of
   the brush shifting type
SECTION NINE - EFFICIENCY AND
POWER FACTOR
20 Efficiency
21 Power factor
SECTION TEN - TESTS
22 General
23 Test certificates
24 Altitude and temperature or cooling medium
25 Initial temperature of machines having
   a short-time rating
26 Duration of temperature-rise test
27 Temperature-rise test for motors which
   operate on variable voltage
28 Temperature-rise test for machines
   having more than one rating
29 Commutation test
30 Sudden short-circuit tests
31 High-voltage tests 3
32 High-voltage test on assembled apparatus
33 High-voltage tests on site
SECTION ELEVEN - TOLERANCES
34 Tolerances
SECTION TWELVE - TERMINAL AND ROTATIONAL MARKINGS
35 Markings
SECTION THIRTEEN - INFORMATION TO BE GIVEN ON RATING-PLATE
36 General information on rating-plate of
   Machine
37 Additional information on rating-plat& of
   direct-current generator
38 Additional information en rating-plate
   of direct-current motor
39 Additional information on rating-plate
   of a.c. generator
40 Additional information on rating-plate
   of synchronous motor
41 Additional information on rating-plate
   of induction motor and a.c. commutator
   motor
APPENDICES
A - Temperature measurement
B - Information to be given with enquiry
    and order

Pertains to generators and motor which are rated for 1 h.p. 075 kW per 1000 rev/min or greater. No upper limit is placed on the power rating.