Electrical safety of machinery—Electrical equipment of machines—Part 7: Requirements of industrial robot
1Key Takeaways
This part of GB/T 5226 specifies the requirements for electrical equipment/systems for industrial robots, including general requirements. Termination of incoming power lines and disconnection switches. Protection against electric shock. Protection of electrical equipment. Equipotential bonding. Control circuits and con…
2Expert Interpretation
In-depth analysis of the safety technical requirements of GB/T 5226.7-2020 standard for industrial robot electrical equipment, covering core contents such as electric shock protection, control circuit design, EMC testing, etc., and providing implementation suggestions and standard comparative analysis.
Standard Overview
GB/T 5226.7-2020 is a special standard for electrical safety of industrial robots, which is a supplementary refinement of GB/T 5226.1-2019. The standard applies to the electrical system of industrial robots with a nominal voltage ≤ AC 1000V or DC 1500V and a frequency ≤ 200Hz, including core components such as electrical cabinets and servo drives.
Core safety requirements
| Safety function | Technical requirements | Corresponding clauses |
|---|---|---|
| Emergency stop safety | Each control station shall be equipped with a manual emergency stop device in accordance with GB 11291.1-2011 | 4.1.2.1 |
| Electric shock protection | Dual protection measures: basic protection (IP2X/IPXXB) and fault protection (automatic power cut-off) | Chapter 6 |
| EMC requirements | Radiated interference ≤40dB(μV/m)@30-230MHz, conducted interference ≤79dB(μV) | Appendix A |
Key technology evolution
Main differences from the 2019 version:
- Added collision detection functional requirements (4.1.2.10)
- Strengthened electromagnetic compatibility test levels (Appendix A Table A.1)
- Cleared the implementation details of equipotential bonding (Chapter 8)
Implementation suggestions
- The protection level of the electric cabinet should be ≥IP54, and the key circuits should use yellow/green two-color protective wires (13.2.2)
- Recommended control circuit voltage: AC 110V/220V or DC 24V/48V (9.1.2)
- EMC testing must include electrostatic discharge (±8kV) and surge (2kV) immunity (A.2.1/A.2.3)