ANSI/NEMA C50.41 : 2012

Foreword
1 Scope
2 Applicable Standards
3 Definitions
4 Service Conditions
5 Basis of Rating
6 Horsepower Ratings of Multispeed Motors
7 Insulation Systems
8 Service Factor
9 Temperature
10 Torques
11 Starting Requirements
12 Load Inertia (Wk[2])
13 Variation from Rated Voltage and Rated Frequency
14 Bus Transfer or Reclosing
15 Power Factor Correction
16 Efficiency
17 Stator current pulsations
18 Surge Capabilities of AC Winding with Form-Wound
   Coils
19 Motors Operating on an Ungrounded System
20 Occasional Excess Current
21 Operation of Induction Motors from Variable-Frequency
   or Variable-Voltage Power Supplies, or Both
22 Belt, Chain, and Gear Drive
23 Aseismatic Capability
24 Airborne Sound
25 Bearings
26 Lubrication System
27 Overspeed
28 Construction Features
29 Terminal Housing and Boxes
30 Coupling End Play and Rotor Float
31 Motor Vibration
32 High-Potential Tests
33 Motor with Sealed Windings - Conformance Tests
34 Tests on Complete Motors
35 Rotation
36 Nameplate
37 Documentation

Pertains to polyphase induction motors intended for use in power-generating stations, including the following: frame size larger than 440 series, squirrel cage type, single speed or multispeed, horizontal or vertical construction and form wound.