GB 47501-2026 Rotating electrical machines - Safety technical specification
1 Scope
This document specifies the general safety technical requirements and inspection rules for rotating electrical machines, and describes the corresponding test methods.
This document applies to the design, manufacture, inspection, certification and maintenance of all rotating electrical machines (including motors and generators, referred to as “machines”) except aerospace motors and traction motors; other types of electrical machines may refer to this document.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB 755 Rotating electrical machines - Rating and performance
GB/T 825 Eyebolts
GB/T 2900.25 Electrotechnical terminology - Rotating electrical machines
GB 2900.27 Electrotechnical terminology - Small-power motor
GB/T 2900.35 Electrotechnical terminology - Explosive atmospheres
GB/3836.1 Explosive atmospheres - Part 1 : Equipment - General requirements
GB/T 3836.2 Explosive atmospheres - Part 2: Equipment protection by flameproof enclosures "d"
GB 3836.3 Explosive atmospheres - Part 3 : Equipment protection by increased safety “e”
GB/T 4207 Method for the determination of the proof and the comparative tracking indices of solid insulating materials
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB/T 4942 Degrees of protection provided by the integral design of rotating electrical machined (IP code) - Classification
GB 5226.1 Electrical safety of machinery - Electrical equipment of machines - Part 1: General requirements
GB 12350 Safety requirements of small power motors
GB/T 14711 General requirements for safety of small and medium size rotating electrical machines
GB/T 47160 Crane and metallurgical motors and canned motors - Safety requirements
3 Terms and definitions
For the purpose of this document, the terms and definitions given in GB/T 2900.25, GB/T 2900.27 and GB/T 2900.35 as well as the following apply.
3.1
clearance
minimum clearance between two conductive components, or between a conductive component and the accessible surface of an electrical machine
[Source: GB/T 2900.35-2023, 426-04-12, modified]
3.2
creepage distance
minimum path distance along the surface of insulating material between two conductive components or between a conductive component and the accessible surface of an electrical machine
[Source: GB/T 2900.35-2023, 426-04-15, modified]
3.3
lead
connecting wire that connects a winding coil to a terminal, to another coil, or leads the coil to other conductors inside the electrical machine
Note: In special cases, the lead may extend to the outside of the electrical machine.
3.4
flexible supply cord
flexible cord that leads directly from the inside to the outside of the electrical machine for power supply
3.5
enclosure
component providing protection of equipment against certain external influences and, in any direction, against direct contact
3.6
touch current
electric current that flows through the human body or animal body when touching the accessible components of one or more devices or equipment
[Source: GB/T 12113-2023, 3.1]
4 Hazard factors
4.1 General
This document only identifies the main and some potential hazards in the design, manufacture, operation, use, transportation, installation, maintenance and other aspects of electrical machine, not all hazards.
4.2 Design factors
4.2.1 Hazards caused by design errors or unreasonable design of the electrical machine, resulting in excessive temperature rise or failure to operate normally.
Contents
Foreword III
Introduction IV
1 Scope
2 Normative reference
3 Terms and definitions
4 Hazard factors
5 Safety technical requirements
6 Marking and instructions
7 Inspection items and rules
Bibliography
Table 1 Safety performance test items for electrical machine products
GB 47501-2026 Rotating electrical machines - Safety technical specification
1 Scope
This document specifies the general safety technical requirements and inspection rules for rotating electrical machines, and describes the corresponding test methods.
This document applies to the design, manufacture, inspection, certification and maintenance of all rotating electrical machines (including motors and generators, referred to as “machines”) except aerospace motors and traction motors; other types of electrical machines may refer to this document.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB 755 Rotating electrical machines - Rating and performance
GB/T 825 Eyebolts
GB/T 2900.25 Electrotechnical terminology - Rotating electrical machines
GB 2900.27 Electrotechnical terminology - Small-power motor
GB/T 2900.35 Electrotechnical terminology - Explosive atmospheres
GB/3836.1 Explosive atmospheres - Part 1 : Equipment - General requirements
GB/T 3836.2 Explosive atmospheres - Part 2: Equipment protection by flameproof enclosures "d"
GB 3836.3 Explosive atmospheres - Part 3 : Equipment protection by increased safety “e”
GB/T 4207 Method for the determination of the proof and the comparative tracking indices of solid insulating materials
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB/T 4942 Degrees of protection provided by the integral design of rotating electrical machined (IP code) - Classification
GB 5226.1 Electrical safety of machinery - Electrical equipment of machines - Part 1: General requirements
GB 12350 Safety requirements of small power motors
GB/T 14711 General requirements for safety of small and medium size rotating electrical machines
GB/T 47160 Crane and metallurgical motors and canned motors - Safety requirements
3 Terms and definitions
For the purpose of this document, the terms and definitions given in GB/T 2900.25, GB/T 2900.27 and GB/T 2900.35 as well as the following apply.
3.1
clearance
minimum clearance between two conductive components, or between a conductive component and the accessible surface of an electrical machine
[Source: GB/T 2900.35-2023, 426-04-12, modified]
3.2
creepage distance
minimum path distance along the surface of insulating material between two conductive components or between a conductive component and the accessible surface of an electrical machine
[Source: GB/T 2900.35-2023, 426-04-15, modified]
3.3
lead
connecting wire that connects a winding coil to a terminal, to another coil, or leads the coil to other conductors inside the electrical machine
Note: In special cases, the lead may extend to the outside of the electrical machine.
3.4
flexible supply cord
flexible cord that leads directly from the inside to the outside of the electrical machine for power supply
3.5
enclosure
component providing protection of equipment against certain external influences and, in any direction, against direct contact
3.6
touch current
electric current that flows through the human body or animal body when touching the accessible components of one or more devices or equipment
[Source: GB/T 12113-2023, 3.1]
4 Hazard factors
4.1 General
This document only identifies the main and some potential hazards in the design, manufacture, operation, use, transportation, installation, maintenance and other aspects of electrical machine, not all hazards.
4.2 Design factors
4.2.1 Hazards caused by design errors or unreasonable design of the electrical machine, resulting in excessive temperature rise or failure to operate normally.
Contents of GB 47501-2026
Contents
Foreword III
Introduction IV
1 Scope
2 Normative reference
3 Terms and definitions
4 Hazard factors
5 Safety technical requirements
6 Marking and instructions
7 Inspection items and rules
Bibliography
Table 1 Safety performance test items for electrical machine products
