GB/T 3883.311-2019 Active

This part of GB 3883 concerns tools driven by motors or electromagnets:
—— Hand-held power tools (Part 2);
—— Portable power tools (Part 3);
—— Garden tools (Part 4).
Hereinafter referred to as "tools".
The rated voltage of AC single-phase or DC tools shall not exceed 250V, and the rated voltage of AC three-phase tools shall not exceed 440V. The maximum rated input power shall not exceed 3700W.
This part concerns the hazards caused by tools when people operate them normally and use them in a reasonably foreseeable manner.
Tools with electric heating elements fall within the scope of this part. The requirements for these heating elements are specified in the relevant parts of GB 4706.
For motors that are not isolated from the power grid and whose basic insulation is not designed according to the rated voltage of the tool, the requirements are specified in Appendix B. For tools driven by motors or electromagnets powered by rechargeable batteries and battery packs used for these tools, the requirements are specified in Appendix K. For such tools that can be operated and/or charged directly on the mains or non-isolated power supply, the requirements are specified in Appendix L.
Hand-held power tools that can be installed on a bracket or workbench as fixed tools without any modification to the tools themselves fall within the scope of this part and are specified in Part 3.
This part does not apply to:
—— Tools used in explosive environments (dust, vapor, or gas);
—— Tools for preparing and processing food;
—— Medical tools;
Addition:
This part applies to portable profile cutting machines used for cutting metals, concrete, bricks, and other materials, equipped with one of the following types of grinding wheels:
—— Type 41 bonded reinforced grinding wheels; or
—— Diamond cutting wheels with circumferential grooves, the width of which does not exceed 10 mm;
and