Published: 1996.12.26 GB 3883.2-1991 Safety of hand-held power tools Part 2: Special requirements for screwdrivers and impact wrenches (available for certification) GB3883.2-1991 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 screwdrivers and impact wrenches Safety of hand-held motor-operated electric toolsPart 2: Particular requirements for screwdrivers and impact wrenches (available for certification)
GB3883.2-91
IEC745-2-2
replaces GB3883.2-85
This standard is equivalent to IEC745-2 -2 "Safety of Handheld Power Tools Part 2 Particular Requirements for Screwdrivers and Impact Wrenches" 1st edition 1982.
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 Screwdrivers and Impact Wrenches" standard. 1 Scope of application
Except for the following provisions, this chapter of Part One applies: 1.1 Replaced with:
This standard applies to hand-held electric screwdrivers and impact wrenches. 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 reached when the tool is operated intermittently in the following cycles. Each cycle consists of a 1-minute continuous operation period and a 1-minute pause period when the tool is powered off. During continuous operation, the load applied to the tool should be such that the input power (W) is equal to the rated input power.
Note: During the test, the clutch mechanism can be replaced by a rotating mechanism so that a brake can be used to apply a load to the motor to reach the rated input power.
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.
The State Administration of Technical Supervision approved the implementation on 1992-02-01 on 27 May 1992
6 Classification
This chapter of Part One applies.
7 flags
This chapter of Part One applies.
8 Protection against electric shock
This chapter of Part 1 applies.
9 Startup
This chapter of Part 1 applies.
10 Input power and current
GB 3883.2-91
Except for the following terms, this chapter of Part One applies: 10.1 Not applicable.
11 Fever
Except for the following terms, this chapter of Part One applies: 11.4 is replaced with:
The tool is run under normal load for 30 cycles. The temperature rise is measured at the end of the 30th operating period. 12Leakage 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 I applies except for the following provisions: 16.2 For screwdrivers, the tests of Part I apply. For impact wrenches, the first part of the test is changed to: the impact wrench runs intermittently for 24 hours. Each cycle consists of a 5s no-load operation period and a 5s rest period when the tool is powered off. The test is performed when the power supply voltage is equal to 1.1 times the rated voltage. for 12h, and then for 12h when the power supply voltage is equal to 0.9 times the rated voltage.
After that, the impact wrench is run for 4 more operating periods, each of which is 6 hours. The interval between these four running periods is at least 30 minutes. During these four operating periods, the impact wrench is loaded with a brake calibrated to bring the impact wrench to its rated input power. GB 3883.2-91
The test cycle consists of a 5s rotation period with the brake applying load and a 5s rest period when the tool is powered off. The test is conducted for 12h when the power supply voltage is equal to 1.1 times the rated voltage, and then when the power supply voltage is equal to 0.9 12h at times of rated voltage.
Note: If the mechanical action of the impact mechanism fails during this test, but the electrical safety is not compromised, a new impact mechanism can be replaced. Abnormal Operation
17
This chapter of Part One applies.
18 Mechanical Hazards
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 In addition to the following provisions, this chapter of Part One applies: 23.3 Paragraphs 1 and 2.
Replaced with:
The lightest cable that can be used is:
Soft cable with ordinary fluoroprene rubber sheath or synthetic rubber sheath with equivalent performance (GB8898). 24 Terminals for external conductors
This chapter of Part 1 applies.
25 Grounding DeviceswwW.bzxz.Net
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.
Electricity
Thermal parts and service parts are resistant
This chapter in the first part applies.
Rust prevention
This chapter in Part 1 applies.
GB 3883.2-91
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:
GB3883.2—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 Power Tools Standardization Technical Committee. 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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