GB 3883.1: Evolution and historical versions
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PDF similar to GB 3883.1-2014
Basic data | Standard ID | GB 3883.1-2014 (GB3883.1-2014) | | Description (Translated English) | [GB/T 3883.1-2014] Safety of hand-held motor-operated electric tools -- Part 1: General requirements | | Sector / Industry | National Standard | | Classification of Chinese Standard | K64 | | Classification of International Standard | 25.140.20 | | Word Count Estimation | 121,125 | | Date of Issue | 12/5/2014 | | Date of Implementation | 10/16/2015 | | Older Standard (superseded by this standard) | GB 13960.1-2008; GB 3883.1-2008 | | Quoted Standard | GB 1002-2008; GB 1003-2008; GB/T 1406.1-2008; GB/T 1804-2000; GB 2099.1; GB 2099.2; GB 2099.3; GB 2099.4; GB 2099.5; GB 2099.6; GB/T 2423.55-2006; GB/T 2893.2-2008; GB/T 2893.3; GB/T 3667.1; GB/T 3667.2; GB/T 3956-2008; GB/T 4208-2008; GB/T 4706.1-2005; G | | Regulation (derived from) | Announcement of Newly Approved National Standards 2014 No. 27 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Standard applies to: hand-held power tool (Part 2); Portable Power Tools (Part 3); garden tools (Part 4) | GB 3883.1-2014: [GB/T 3883.1-2014] Safety of hand-held motor-operated electric tools -- Part 1: General requirements
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Safety of hand-held motor-operated electric tools.Part 1. General requirements
ICS 25.140.20
K64
National Standards of People's Republic of China
Replacing GB 3883.1-2008, GB 13960.1-2008
Handheld, Portable power tools and garden
Tools - Safety - Part 1. General requirements
Issued on. 2014-12-05
2015-10-16 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 4
4 General requirements 10
5 General test conditions 10
6 Radiation, toxicity and similar hazards 11
7 Category 12
8 Marking and instructions 12
9 protected from contact with live parts 19
10 starting 20
11 Power input and current 20
12 Fever 21
13 heat resistance and flame retardance 24
14 25 moisture resistance
15 rust 27
Overload protection circuit 2716 of the transformer and its associated
17 27 Durability
18 does not normally operate 28
19 Mechanical hazards 33
20 Mechanical strength 34
21 Structure 35
22 Internal wiring 41
23 assembly 42
24 Power connection and external flexible cords 45
25 outer lead terminals 49
26 grounding 50
27 screws connecting member 51
28 creepage distances, clearances and distances through insulation 53
Appendix A (normative) creepage distance and clearance measurements 59
Appendix B (normative) is not isolated from the grid, which do not follow the basic insulation rated voltage design tool motor 63
Annex C (normative) Leakage current 65
Annex D (normative) Electric strength 68
Annex E (informative) Power Tools purposes GB/T 22696 Method 70
Rule Appendix F (normative) Routine tests 74
Appendix G (empty) 76
Annex H (normative) low-power circuit is determined 76
(Informative) Appendix I measure noise and vibration 77
Choose the order in Appendix J (informative) Chapter 13, heat resistance and flame resistance tests 88
Annex K (normative) battery-operated tools and battery packs 89
Annex L (normative) provides power connection or non-isolated source of battery-operated tools and battery packs 103
References 116
Foreword
All technical content in this section is mandatory.
GB 3883 "hand-held, transportable safe electric tools and garden tools" is divided into four parts.
--- Part 1. General requirements;
--- Part 2. Hand-held power tool of special requirements;
--- Part 3. Particular requirements for movable electric tools;
--- Part 4. Particular requirements for garden tools.
This section GB of Section 13883.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB 3883.1-2008 and GB 13960.1-2008.
The enactment of this section is a hand-held power tool safety general part, based on the basic coverage Portable electric tools and garden tools
Common security requirements, modify, change the main provisions are as follows.
--- Heat resistance, flame retardancy and resistance to tracking moved to Chapter 13, and remove resistance to tracking requirements, modify the heat resistance and flame resistance;
--- Rust, radiation, toxic or similar hazard from Chapter 30, Chapter 31 and Chapter 15 were moved to Chapter 6;
--- Leakage current detection and electric strength test from Chapters 13 and 15, respectively, moved to Appendix C and Appendix D;
--- Critical safety function is added to Chapter 18;
--- Low-power circuit is determined to move from Chapter 18 Appendix H;
--- Chapter 9, Chapter 13, Chapter 19, an increase of soft material (elastomer) instructions;
--- Revised provisions switches moved from Appendix I to Chapter 23;
--- Annex D (normative) Test method for increasing the voltage D.3 impact;
--- Increase in Appendix E (normative) Power Tools purposes GB/T 22696 method;
--- Increase in Annex I (informative) Measurement of noise and vibration;
--- Lithium-ion battery system to increase provisions in Annex K and in Annex L.
This part is proposed by the China Electrical Equipment Industrial Association.
This part of the National Power Tools Standardization Technical Committee (SAC/TC68) centralized.
This section is responsible for drafting unit. Shanghai Electric Tool Research Institute.
Participated in the drafting of this section. Zhe Jiang Hengyou Electrical Co., Ltd. Hongda Group Co., Ltd., Stephen Peak (China) Co., Ltd., Jiangsu
Jinding Electric Tools Group Co., Ltd., Yangzhou Power Tools Co., Ltd., Suzhou Bao when Power Tools Co., Ltd., Foshan City lark
Vibrator Co., Ltd. Cixi Best Power Tools Co., Black & Decker (Suzhou) Precision Manufacturing Co., Makita (China) Co.,
the company.
The main drafters of this section. Pan Shunfang, Libang Association, Gu Jing, Xu Zhongxin, Xu Peng, JIANG Peng-fei, Wu Wenjun, Chen Jianqiu, Wang Yue, Chen Qin,
Zhou Baoguo, Mr Cho, Zhou Yuan, Kan Yi Deng, Ding Yu Cai, Yu Liming.
This part of the standard replaces the previous editions are.
--- GB 3883.1-2008;
--- GB 13960.1-2008.
Handheld, Portable power tools and garden
Tools - Safety - Part 1. General requirements
1 Scope
GB This section 3883 relates to a motor or solenoid driven.
--- Handheld power tool (Part 2);
--- Portable Power Tools (Part 3);
--- Garden tools (Section 4).
Hereinafter referred to as "Tools."
Single-phase AC or DC tool rated voltage not exceeding 250V, three-phase AC voltage is not greater than the rated tool 440V. Maximum rated
Input power not exceeding 3700W.
This section relates to the risk of people during normal operation and reasonably foreseeable use of tools encountered by the tool caused.
Electric heating element belongs to the scope of this tool. The heating elements of the requirements specified in the relevant part of 4706 in GB .
For non-isolated grid and do not follow the basic insulation rated voltage design tool motor, which requirements set in Appendix B. Correct
The motor driven or solenoid driven tool powered by a rechargeable battery and a battery pack for these tools, which requires in Appendix K
Specified. For directly connected to the mains power supply or isolated operation and/or charging of such tools, which requires specified in Appendix L.
Without any transformation of the tool itself will be able to install a bracket, or table as a fixed hand-held power tools used in engineering
A part of the scope of this section, the provisions of Part 3 to.
This section does not apply to.
--- Tool for use in explosive environments (dust, vapor or gas); and
--- Food preparation and processing tools;
--- Medical tools;
Note 1. GB 9706 series, GB 10793 and GB 11243 covers a range of medical tools.
--- Tools and cosmetics and pharmaceuticals used together;
--- Heating tools;
Note 2. GB 4706.41 covering a range of heating tools.
--- Motor-driven household and similar electrical appliances;
Note 3. GB 4706 series covers a range of motor-driven household and similar electrical appliances.
--- Industrial electrical equipment for machine tools;
Note 4. GB 5226 series involving mechanical electrical safety.
--- Used by the low-voltage transformer drive small desktop tools to create the model, such as the production or model airplane remote control car model.
Note 5. Pay particular attention to local governments based on additional requirements or special working conditions prescribed.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB 1002-2008 Household and similar single-phase plug and socket type, basic parameters and dimensions
GB 1003-2008 Household and similar three-phase plug and socket type, basic parameters and dimensions
GB/T 1406.1-2008 lamp types and dimensions - Part 1. screw-on cap (IEC 60061-1.2005, MOD)
GB/T 1804-2000 General tolerances for linear and angular dimensions tolerances tolerances (ISO 2768-1. 1989, EQV)
GB 2099 (all parts) for household and similar purposes plugs and sockets [IEC 60884 (alparts)]
GB/T 2423.55-2006 Environmental testing for electric and electronic products - Part 2. Environmental Test Test Eh. Hammer tests
(IEC 60068-2-75.1997, IDT)
GB/T 2893.2-2008 Graphical symbols - Safety colors and safety signs - Part 2. Design principles for product safety labels
(ISO 3864-2.2004, MOD)
GB/T 2893.3 Graphical symbols - Safety colors and safety signs - Part 3. Signs of safety design principles of graphical symbols
(GB/T 2893.3-2010, ISO 3864-3.2006, MOD)
GB/T 3667 (all parts) AC motor capacitor [IEC 60252 (all parts)]
GB/T 3956-2008 conductor cable (IEC 60228.2004, IDT)
GB 4208-2008 housing protection (IP Code) (IEC 60529.2001, IDT)
GB 4706.1-2005 household and similar electrical appliances - Safety - Part 1. General requirements (IEC 60335-1.2001, IDT)
GB/T 4956-2003 on a non-magnetic substrate magnetic coatings Measurement of coating thickness - Magnetic method (ISO 2178. 1982, IDT)
GB/T 5013.4-2008 rated voltage of 450/750V and below rubber insulated cables Part 4. Cords and flexible cables
(IEC 60245-4.2004, IDT)
GB/T 5023.5-2008 rated voltage of 450/750V and below PVC insulated cables Part 5. Flexible cables (cords)
(IEC 60227-5.2003, IDT)
GB/T 5169.11-2006 Fire hazard testing for electric and electronic products - Part 11. Glowing/hot-wire based test methods to
Glow-wire flammability test method for products (IEC 60695-2-11.2000, IDT)
GB/T 5169.13-2013 Fire hazard testing for electric and electronic products - Part 13. Glowing/hot wire based test methods for timber
Material glow wire ignition temperature (GWIT) test methods (IEC 60695-2-13.2010, IDT)
GB/T 5169.16-2008 Fire hazard testing for electric and electronic products - Part 16. Test flames - 50W horizontal and vertical flame
Test methods (IEC 60695-11-10.2003, IDT)
GB/T 5169.21-2006 Fire hazard testing for electric and electronic products - Part 21. Abnormal heat - Ball pressure test
(IEC 60695-10-2.2003, IDT)
GB/T 5465.2-2008 Graphical symbols for electrical equipment - Part 2. Graphical symbols (IEC 60417DB.2007, IDT)
GB/T 6462-2005 and the metal oxide coating layer thickness measurement microscope method (ISO 1463.2003, IDT)
GB 7247.1-2012 Safety of laser products - Part 1. Equipment classification, requirements (IEC 60825-1.2007, IDT)
GB/T 8332-2008 foam burning behavior of horizontal combustion method (ISO 9772.2001, IDT)
GB 8898-2011 Audio, video and similar electronic apparatus - Safety requirements (IEC 60065.2005, MOD)
GB 9364 (all parts) miniature fuses [IEC 60127 (alparts)]
GB/T 11021-2014 heat resistance and electrical insulation representation (IEC 60085.2007, IDT)
GB/T 11918-2001 industrial plug and socket couplers - Part 1. General requirements (IEC 60309-1.1999, IDT)
GB/T 11919-2001 industrial plug and socket coupling - Part 2. With pin and sleeve size interchangeable electrical accessories
Requirements (IEC 60309-2.1999, IDT)
GB/T 12113-2003 touch current and protective conductor current measurement method (IEC 60990.1999, IDT)
Part 2 GB 13140.2-2008 Connecting devices for low voltage circuits for household and similar purposes used. as a stand-alone unit with screw
Particular requirements for connecting devices of the type clamping units (IEC 60998-2-1.2002, IDT)
Part 2 GB 13140.3-2008 Connecting devices for low voltage circuits for household and similar purposes used. as a standalone unit with no screw
Particular requirements (IEC 60998-2-2.2002, IDT) grain-type clamping units for connecting devices
GB/T 14472-1998 Fixed capacitors for use in electronic equipment - Part 14. Sectional specification curb the power of electromagnetic interference with a fixed capacitance
Device (IEC 60384-14.1993, IDT)
GB 14536.1-2008 household and similar electrical controls - Part 1. General requirements (IEC 60730-1.2003,
IDT)
GB 15092.1-2010 Switches for appliances - Part 1. General requirements (IEC 61058-1.2008, IDT)
GB/T 16273.1-2008 equipment - Graphical symbols - Part 1. Common symbols (ISO 7000.2004, NEQ)
GB 16754-2008 Safety of machinery - Emergency stop design principles (ISO 13850.2006, IDT)
GB/T 16842-2008 protective shell for inspection and test equipment used with (IEC 61032.1997, IDT)
GB/T 16855.1-2008 Safety of machinery - Safety-related control system components - Part 1. General principles for design (ISO 13849-1.
2006, IDT)
GB/T 16935.1-2008 within low-voltage systems Insulation coordination for equipment - Part 1. Principles, requirements and tests (IEC 60664-1.
2007, IDT)
GB/T 16935.3 insulation coordination for equipment within low-voltage systems - Part 3. Using the coating, potting or molding for protection against pollution
(GB/T 16935.3-2005, IEC 60664-3.2003, IDT)
GB 17196-1997 Connecting devices - Flat quick copper wire connecting terminal Safety requirements (IEC 61210.1993,
IDT)
GB 17464-2012 Safety requirements for connecting devices Electrical copper conductors - screw-type and screwless-type clamping units suitable for
0.2mm2 or more to 35mm2 (including) the general requirements of the wire clamp and special requirements (IEC 60999-1.1999, IDT)
GB 17465 (all parts) for household and similar appliances couplers [IEC 60320 (alparts)]
GB/T 17626.2-2006 Electromagnetic compatibility - Testing and measurement techniques - Electrostatic discharge immunity test (IEC 61000-4-2.2001,
IDT)
GB/T 17626.4-2008 Electromagnetic compatibility - Testing and measurement techniques - Electrical fast transient burst immunity test (IEC 61000-
4-4.2004, IDT)
GB/T 17626.5-2008 Electromagnetic compatibility - Testing and measurement techniques - Surge (impact) immunity test (IEC 61000-4-5.
2005, IDT)
GB/T 17626.6-2008 Electromagnetic compatibility - Testing and measurement techniques - conducted disturbances induced by RF field immunity (IEC 61000-
4-6.2006, IDT)
GB/T 17626.11-2008 Electromagnetic compatibility Testing and measurement techniques - Voltage dips, short interruptions and voltage variations immunity
Test (IEC 61000-4-11.2004, IDT)
GB 19212.1-2008 power transformers, power supplies, reactors and similar products - Part 1. General requirements and tests
(IEC 61558-1.2005, IDT)
GB 19212.5-2011 supply voltage higher than the safe 1100V and below transformers, reactors, power supply units and similar products
Part 5. Particular requirements for isolating transformers and built-in isolation transformer power supply device (IEC 61558-2-4.2009, IDT)
GB 19212.7-2012 supply voltage higher than the safe 1100V and below transformers, reactors, power supply units and similar products
Part 7. Security and isolation transformers built Particular requirements for transformers (IEC 61558-2-6.2009, IDD)
Safety - Part 18 GB 19212.18-2006 power transformers, power supply units and similar products. switch mode power transformer
Particular requirements (IEC 61558-2-17.1997, MOD)
GB/T 19639.1 Small VRLA battery technology conditions (GB/T 19639.1-2005, IEC 61056-1.2002, MOD)
Portable residual current device (PRCD) GB 20044-2005 electrical accessories for household and similar purposes without overcurrent protection
(IEC 61540.1997, MOD)
GB/T 22084.1-2008 and batteries containing alkaline or other non-acid electrolytes - Portable sealed monomer reservoir ---
Batteries - Part 1. Nickel-cadmium batteries (IEC 61951-1.2003, IDT)
GB/T 22084.2-2008 and batteries containing alkaline or other non-acid electrolytes - Portable sealed monomer reservoir ---
Batteries - Part 2. Nickel-metal hydride batteries (IEC 61951-2.2003, IDT)
GB/T 28867-2012 square and batteries containing alkaline or other non acid electrolytes sealed nickel-cadmium storage monomers
Pool (IEC 60622.2002, IDT)
GB 29303-2012 for class Ⅰ and battery-powered vehicles can be opened and closed protective earth portable residual current devices (SPE-PRCD)
(IEC 62335.2008, MOD)
ISO 7010.2011 Graphical symbols - Safety colors and safety signs - Registered safety signs (Graphicalsymbols-Safety
coloursandsafetysigns-Registeredsafetysigns)
IEC 61984 safety requirements and test connectors (Connectors-Safetyrequirementsandtests)
IEC 62233 measurement method (Measurementmethodsfor body for household appliances and the like electromagnetic radiation absorbed
electromagneticfieldsofhouseholdappliancesandsimilarapparatuswithregardtohumanexposure)
IEC 62471 lamps and lamp systems light biosafety (Photobiologicalsafetyoflampsandlampsystems)
Light Biosafety Part 22009 lamps and lamp systems.. IEC /T R62471-2 manufacturing related non-laser optical radiation safety
Requirements Guideline (Photobiologicalsafetyoflampsandlampsystems-Part 2. Guidanceonmanufacturingre-
quirementsrelatingtonon-laseropticalradiationsafety)
3 Terms and Definitions
The following terms and definitions apply to this document.
Unless otherwise specified, the term "voltage" and "current" refers to a valid value.
This section, where a "means of a tool", "without the aid of tools" and "need to use the tools" at the word "tools" are to be used to twist
Screws or other fasteners hand tool such as a screwdriver.
3.1
Accessible parts accessiblepart
With GB/T 16842 test with B can reach all parts of conductive or insulating material surface.
3.2
Accessory attachment
Only attached to the body of the tool's output device.
3.3
Adjustable guard adjustableguard
Overall adjustable and contain an adjustable part of the shroud. Manually adjustable to cover the adjustment device remains fixed during a particular operation.
3.4
All-pole disconnect al-poledisconnection
Disconnect from a single trigger action to protect all supply conductor ground wire outside.
3.5
Accessory attachment
Attached to the tool housing or other components of the device, which can be installed in or mounted on the output mechanism, without changing the scope of this tool
Normal use.
3.6
Basic insulation basicinsulation
For providing protection against electric shock of live parts insulation. Insulation does not provide for protection against electric shock of live parts is called functional mesh
Of insulation, such as magnet wire insulation.
3.7
Class Ⅰ tool classⅠtool
Such a class of tools. its protection against electric shock does not rely on basic insulation, double insulation or reinforced insulation, but also includes an additional
Security measures, namely the protective conductor and accessible conductive parts facility in the fixed wiring connected, make accessible conductive parts in
Basic insulation can not become a charged body when damaged. Double insulated with a ground terminal or ground contact and/or reinforced insulation tools are also considered
Is Ⅰ class tools.
3.8
Ⅱ Tools classⅡtool
Such a class of tools. its protection against electric shock does not rely on basic insulation, but also on additional security measures to provide, such as dual
Or reinforced insulation, no protective measures are not dependent on ground installation conditions.
3.9
Ⅲ Tools classⅢtool
Such a class of tools. its protection against electric shock relies on safety extra-low voltage power supply, do not produce the tool above the safety extra-low voltage
Voltage.
3.10
Ⅰ class structure classⅠconstruction
Tools rely on the ground for protection against electric shock part.
3.11
Ⅱ class structure classⅡconstruction
Tools rely on double or reinforced insulation for protection against electric shock part.
3.12
Ⅲ class structure classⅢconstruction
Tools rely on safety extra-low voltage for protection against electric shock part, and that part does not generate higher than safety extra-low voltage.
3.13
Clearance clearance
Between two conductive parts, or a layer of metal foil close to the cabinet and regarded conductive parts accessible surfaces of insulating material
Minimum space between the outer surface of the measured distance.
NOTE. The sample clearances are given in Appendix A.
3.14
Control means controldevice
Used to adjust and/or means for adjusting the tool's electrical or mechanical functions.
3.15
Creepage distance creepagedistance
Between two conductive parts, or between a conductive part and the outer surface of the housing, the shortest path along the surface of insulating material measured may be regarded as easy touch
And insulating material on the surface close to a metal foil.
NOTE. The sample creepage distances are given in Appendix A.
3.16
Removable parts detachablepart
Without the aid of tools to dismantle or open parts, or instructions provided by the use of the parts to be removed (even if demolition work is required
A), except for externally accessible brush cover, or not pass the test of 21.22 parts.
3.17
Double insulation doubleinsulation
Insulation system consists of both basic insulation and additional insulation composition.
3.18
Electronic circuit electroniccircuit
Comprising at least one electronic circuit component.
3.19
Electronic components electroniccomponent
Mainly by the movement of electrons through a vacuum, gas or semiconductor implementation conductive parts, except neon or neon. Examples of electronic components
Diodes, transistors, thyristors, monolithic IC. I do not think resistors, capacitors and inductors electronic components.
3.20
Explosion explosion
Housing and suddenly burst out of the main components of the projectile, this failure may occur cause injury.
3.21
Extra Low Voltage extra-lowvoltage
By the tool internal power supply voltage, and when the tool at rated voltage, the voltage between the conductor and the ground conductor
Room was no more than 50V.
3.22
Fixed shroud fixedguard
For example by means of screws, nuts or welding to the fixed shroud, only the use of tools or destroying a fixed manner or can be opened
tear down.
3.23
Shield guard
Designed as part of the tool to prevent mechanical hazards of the bezel.
3.24
Hand-held tool hand-heldtool
Used to do mechanical work, or may not provide means for mounting the bracket, designed to partially assembled by the motor and mechanical one, easy
Carry into the workplace, and can be hand held or supported or suspended operation of the tool.
Note. The hand-held tool can be equipped with flexible shaft, while the electric motor can be fixed, it can be portable.
3.25
Inherent operating cycle inherentoperatingcycle
Designed as a complete cycle duration can not be run repeatedly changed by the operator of the tool.
3.26
Interconnection cord interconnectioncord
Provide external electrical connection between the tool cord of twenty.
3.27
Intended use intendeduse
The information provided by the producer of the product (including their parts, accessories, instructions and packaging), use of the process or service.
3.28
Garden tools lawnandgardenmachinery
Maintenance of garden tools.
3.29
Systems for liquid liquidsystem
Complete external or internal water intended function tool that must be used or a water-based liquid system.
3.30
Live parts livepart
Energized normal use any wires or conductive parts, including the neutral line.
3.31
The average time to dangerous failure meantimetodangerousfailure; MTTFd
The average time expected dangerous failure.
3.32
Momentary power switch momentarypowerswitch
It can not remain in the "on" state of the switch actuator means after release.
3.33
No removable parts non-detachablepart
Only by means of tools to dismantle or open part or parts of the test by 21.22.
3.34
Non-self-resetting thermal cut non-self-resettingthermalcut-out
Require manual reset or replacement parts to restore the current thermal circuit breaker.
3.35
Normal operation normaloperation
When connected to a power tool condition, normal use operation.
3.36
Normal use normaluse
Design requirements, reference manual for the producers the use of tools.
3.37
Performance Level performancelevel; PL
Under the conditions of use can be expected for specifying the control system relating to safety components that perform security functions of discrete levels.
[GB/T 46855.1-2008, the definition 3.1.23]
3.38
Power switch powerswitch
In the power position of the main menu and start the tool position releasing the tool at the same function unit is powered off.
3.39
Protection protectivedevice
Under normal operating conditions it is not possible to prevent the operation means a hazardous condition.
3.40
Protective impedance protectiveimpedance
Connected between live parts and accessible conductive parts of the impedance under normal use and value of its possible failure in the tool, the electricity
Flow is limited to a safe value.
3.41
Rated current ratedcurrent
Producers predetermined current tools.
3.42
Rated frequency ratedfrequency
Producers predetermined ...
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