1.1 The standard specifies the safety requirements of small/medium general-purpose rotating electrical machines (electric motor and generator, hereinafter referred to as “motor”).
1.2 This standard is not applicable to astronautic motors, traction motors, explosion-proof motors, hoist and metallurgical motors, shield motors. Tests of small power motors produced according to GB/T 5171 can also refer to GB12350.
1.3 In case other types of motors involve special requirements that are not covered in this standard, new standard should be developed.
Foreword 1 Scope 2 Normative References 3 Technical terms and explanations 3.1 Clearance 3.2 Creepage distance 3.3 Lead 4 General requirements 5 Structure 5.1 General principles 5.2 Outer cover 5.3 Non-metallic structures 5.4 Junction box (for motors ≤750V) and wiring devices 5.5 Conduit bushing and equivalent tapped hole 5.6 Supply cord 5.7 Lead wire 5.8 Clearance and creepage distance of low voltage motors (for requirements on high voltage motors, see Chapter 9 of this standard) 5.9 Components 5.10 Protective grounding devices 5.11 Brush holder and terminals 5.12 Wire terminal 5.13 Bearing structure 5.14 Commutator and collector ring 5.15 Insulation 5.16 Joints 6 Symbols 7 Tests 7.1 General principles 7.2 Tests of symbols and signs 7.3 Thermal tests 7.4 Insulation resistance 7.5 Voltage withstanding test 7.6 Protection test 7.7 Moisture/thermal test 7.8 Mechanical strength test 7.9 Supply cord clamps 7.10 Insulation system appraisal 7.11 Nonmetallic material ageing test 7.12 Thermal deformation resistance 7.13 Burning test 7.14 Electric tracking resistance 7.15 Accessories test 7.16 Rusting resistance 8 Low-tension AC motor with rated voltage ≤1,000V (including universal motor) 8.1 Scope 8.2 Structure 8.3 Signs and Symbols 8.4 Test 9 High-tension AC motors with rated voltage greater than 1,000V 9.1 Scope 9.2 Structure 9.3 Signs and symbols 9.4 Test 10 DC motors 10.1 Scope 10.2 Structure 10.3 Signs and symbols 10.4 Test 11 Portable and auxiliary generators 11.1 Scope 11.2 Structure 11.3 Signs and symbols 11.4 Test 12 Variable-frequency & adjustable-speed motor 12.1 Scope 12.2 Structure 12.3 Signs and symbols 12.4 Test
1 Scope
1.1 The standard specifies the safety requirements of small/medium general-purpose rotating electrical machines (electric motor and generator, hereinafter referred to as “motor”).
1.2 This standard is not applicable to astronautic motors, traction motors, explosion-proof motors, hoist and metallurgical motors, shield motors. Tests of small power motors produced according to GB/T 5171 can also refer to GB12350.
1.3 In case other types of motors involve special requirements that are not covered in this standard, new standard should be developed.
Contents of GB 14711-2006
Foreword
1 Scope
2 Normative References
3 Technical terms and explanations
3.1 Clearance
3.2 Creepage distance
3.3 Lead
4 General requirements
5 Structure
5.1 General principles
5.2 Outer cover
5.3 Non-metallic structures
5.4 Junction box (for motors ≤750V) and wiring devices
5.5 Conduit bushing and equivalent tapped hole
5.6 Supply cord
5.7 Lead wire
5.8 Clearance and creepage distance of low voltage motors (for requirements on high voltage motors, see Chapter 9 of this standard)
5.9 Components
5.10 Protective grounding devices
5.11 Brush holder and terminals
5.12 Wire terminal
5.13 Bearing structure
5.14 Commutator and collector ring
5.15 Insulation
5.16 Joints
6 Symbols
7 Tests
7.1 General principles
7.2 Tests of symbols and signs
7.3 Thermal tests
7.4 Insulation resistance
7.5 Voltage withstanding test
7.6 Protection test
7.7 Moisture/thermal test
7.8 Mechanical strength test
7.9 Supply cord clamps
7.10 Insulation system appraisal
7.11 Nonmetallic material ageing test
7.12 Thermal deformation resistance
7.13 Burning test
7.14 Electric tracking resistance
7.15 Accessories test
7.16 Rusting resistance
8 Low-tension AC motor with rated voltage ≤1,000V (including universal motor)
8.1 Scope
8.2 Structure
8.3 Signs and Symbols
8.4 Test
9 High-tension AC motors with rated voltage greater than 1,000V
9.1 Scope
9.2 Structure
9.3 Signs and symbols
9.4 Test
10 DC motors
10.1 Scope
10.2 Structure
10.3 Signs and symbols
10.4 Test
11 Portable and auxiliary generators
11.1 Scope
11.2 Structure
11.3 Signs and symbols
11.4 Test
12 Variable-frequency & adjustable-speed motor
12.1 Scope
12.2 Structure
12.3 Signs and symbols
12.4 Test
