Published: 1996.12.26 GB 3883.4-1991 Safety of hand-held power tools Part 2: Special requirements for sanders (available for certification) GB3883.4-1991 Standard download and decompression password: www.bzxz.net

Version.
National Standard of the People's Republic of China
Safety of hand-held motor-operated electric tools
Part 2: Special requirements for sanding machines
Safety of hand-held motor-operated electric toolsPart2: Particular requirements for sanders (available for certification)
GB3883.4--91
IEC745-2-4
replaces GB3883.4--85
The standard is equivalent to the use of IEC745-2-4\Safety of Hand-held Power Tools Part 2: Special Requirements for Sanders "1983 - General Requirements". This standard lists the standards that should be used together with GB3883.1 "Hand-held Power Tools" Safety of Power Tools Part 1 Necessary changes made by converting Part 1 into the "Safety Requirements for Sanders" standard 1 Scope of application
In addition to the following provisions, this chapter of Part 1 applies: 1.1 First. The sentence
is replaced by:
This standard applies to hand-held electric sanders. Note: Sanders with water sources are included in the scope of this standard. (under consideration), 2 Definition
Except for the following terms, this chapter of Part One applies: 2.2.23 is replaced with:
Normal load refers to the load that the tool operates continuously under the following conditions. To achieve the load, the tool is loaded with 80-grit aluminum oxide sandpaper, and an additional weight with a mass of 3kg or equal to the tool mass (whichever is smaller) is added to the tool, and the tool is placed on the horizontal cork surface. Move forward and backward a distance of 50 cm at a rate of 30 times per minute. Note: For tests that require normal load, a brake can be used instead of sanding the wood surface. However, the load obtained by the brake must be. Equivalent to the negative intercept measured after the tool has been operated under normal load for 2 minutes. 3 General requirements
This chapter of Part 1 applies
4 General precautions for testing
This chapter of part 1 applies.
5 Rating
This chapter of part 1 applies. | tt | This chapter applies: 7.1 Added:
The belt sander should be marked with:
Rotation direction sign
7.11 Added:
For belt sanding. machine, the direction of rotation of the sanding belt shall be marked with a raised or recessed arrow, or other clear and durable means of expression
Added clause:
7.101 Sanding machine with water source, Except for those of Class IIII, a special page instruction sheet should be attached to indicate that the tool must be powered by an isolation transformer, and indicate the type of transformer to be used or the technical parameters of the transformer itself. 8 Protection against electric shock
This chapter of Part 1 applies.
9 Startup
This chapter of Part 1 applies.
10 Input power and current
This chapter of Part 1 applies.
11 Fever
This chapter of Part One applies.
12 Leakage current
This chapter of Part 1 applies.
13 Radio and television interference suppression
This chapter of Part 1 applies.
14 Moisture resistance
This chapter of Part 1 applies.
15 Insulation resistance and dielectric strength
This chapter of Part 1 applies.
16 Durability
This chapter of Part 1 applies except for the following terms: 16.2 Addition:
GB3883.4-91
Oscillating plate sanding The machine and the reciprocating plate sander operate at rated voltage. At this time, the sandpaper is installed on the pressure sanding plate in the opposite position, and the pressure sanding plate is pressed on the steel plate by the weight of the sander itself. In order to avoid direct contact between the pressure grinding plate and the steel plate, the sandpaper should be replaced when necessary. 17 Abnormal Operation
This chapter in Part One applies.
18 Mechanical Hazards
This chapter of Part 1 applies.
19 Mechanical Strength
This chapter of Part 1 applies.
20 Structure
In addition to the above clauses, this chapter of Part One applies: Additional clauses:
20.101 Sanding machines with water sources shall be so constructed that their electrical insulation does not expose them to cold The effect of possible condensation on surfaces or leakage of water on water reservoirs, hose connections and similar devices. Check compliance with requirements by observation. 21 Internal wiring
This chapter of Part 1 applies.
22 components
This chapter from Part 1 applies.
23 Power connection and external flexible cables and cords In addition to the following provisions, this chapter of Part One applies: 23.3 Added:
For tools with water sources, the lightest cable that can be used is : A flexible cable with an ordinary chloroprene rubber sheath or a synthetic rubber sheath with equivalent performance (GB8898). 24 Terminals for external conductors
This chapter of Part 1 applies.
25 Grounding Devices
This chapter of Part 1 applies.
26 Screws and Connections
This chapter of Part 1 applies.
27 Creepage distances, clearances and insulation penetration distances This chapter of Part 1 applies.
28 Heat resistance, flame resistance and leakage resistance This chapter of Part 1 applies.
29 Rust Prevention
This chapter of Part 1 applies.
GB3883.4-91
This appendix to Part 1 applies.
This addendum to Part 1 applies.
This addendum to Part 1 applies.
This addendum to Part 1 applies.
Additional instructions:
GB3883.4-91
Appendix A
Thermal circuit breaker and overload releasebzxZ.net
(supplement)||tt ||Appendix B
Electronic circuit
(Supplement)
Appendix C
Structure of safety isolation transformer
(Supplement)||tt| |Appendix D
Measurement of creepage distances and clearances
(Supplement)
This standard is proposed by the Ministry of Mechanical and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Power Tools. This standard was drafted by the Shanghai Power Tool Research Institute of the Ministry of Mechanical and Electronic Industry. The main drafters of this standard are Li Hongzhao and Qian Naichi.
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