GB 3883.9-1991 Safety of hand-held power tools Part 2: Special requirements for electric tapping machines (available for certification) GB3883.9-1991 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Safety of hand-held motor-operated electric tools
Part 2: Particular requirements for electric tappers( Available for certification)
GB3883.9-91
IEC745-2-9
replaces GB3883.9-85
This standard is equivalent to IEC745-2-9 "Safety of Handheld Power Tools Part 2: Special Requirements for Tapping Machines" 1984 first edition.
This standard should be used together with GB3883.1 "Safety of Handheld Power Tools Part 1 General Requirements". This standard lists the changes necessary to convert Part 1 into the "Safety Requirements for Tapping Machines" standard. 1 Scope of application
Except for the following provisions, this chapter of Part One applies: 1.1 is replaced with:
This standard applies to tapping machines.
2 Definitions
This chapter of Part One applies except for the following provisions: 2.2.23 Paragraph 1.
is replaced by:
Normal load refers to the load when the tool operates intermittently with 1 minute of continuous operation and 1 minute of power outage as one cycle. The load applied during continuous operation should have an input power (W) equal to the rated input power. Loads can be applied with brakes.
3 General requirements
This chapter of Part 1 applies.
4 General considerations for testing
This chapter of Part 1 applies.
5 Ratings
This chapter of Part One applies.
6 categories
This chapter of Part 1 applies.
State Bureau of Technical Supervision approved on 1991-05-27 for implementation on 1992-02-01
7 mark
GB3883.9—91
Except for the following provisions, Article Part of this chapter applies: 7.1 Addition:
In addition, the tool shall be marked with the following symbol:
The maximum diameter of the thread that can be cut, mm.
Note: Unless otherwise marked on the tool, this diameter should be understood to refer to the diameter of ISO metric threads cut in steel with a tensile strength of 390N/mm and a thickness of 2 times the thread diameter.
8 Protection against electric shock
This chapter of Part 1 applies.
9 Startup
This chapter of Part 1 applies.
10 Input power and current
Except for the following provisions, this chapter of Part One applies: 10.1 Modification:
This test will not be performed.
11 Fever
Except for the following provisions, this chapter of Part 1 applies: 11.4 Modification:
The tool operates at the specified normal load for 30 minutes. The temperature rise is measured at the end of the last run period. 12Leakage current
This chapter of Part 1 applies. wwW.bzxz.Net
3 Radio and television interference suppression
13
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 One applies.
17 Abnormal Operation
This chapter of Part 1 applies.
Mechanical Hazards
18
This chapter of Part 1 applies.
19 Mechanical Strength
This chapter of Part 1 applies.
20 Structure
This chapter of Part 1 applies.
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 This chapter of Part 1 applies.
24 Terminal blocks for external conductors
This chapter of Part 1 applies.
25 Ground Protection
This chapter of Part 1 applies.
26 Screws and Connections
This chapter of Part 1 applies.
27 Creepage distances, electrical clearances and insulation penetration distances This chapter of Part 1 applies.
28 Heat resistance, flame resistance and resistance to leakage and tracking. This chapter of Part 1 applies.
29 Rust Prevention
This chapter of Part 1 applies.
GB3883.9—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:
GB3883.9—91
Appendix A
Thermal circuit breaker and overload release
(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 is 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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