GB/T 3787-2017Technical safety code for management, operation, inspection and maintenance of hand-held motor-operated electric tools (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This Standard replaces GB/T 3787-2006, Technical safety code for management, operation, inspection and maintenance of hand-held motor-operated electric tools.

Compared with GB/T 3787-2006, the major technical changes are as follows.

-- it adds "terms and definitions" (see Clause 3);

-- it adds that "the transportation lithium batteries must comply with relevant domestic and international regulations" and deletes the "methods for storage and maintenance of tools" (see Clause 4);

-- the narrative order of "operation" of Clause 5 is adjusted, which is divided into 5.1 "general provisions", 5.2 "classification of tools' applications", 5.3 "operation conditions" and 5.4 "plugs and sockets";

-- it adds the requirements for gripping and protective articles when operators are using tools (see Clause 5);

-- it adds the safety requirements for electric tools with water source (see Clause 5);

-- it adds the non-operating current value of overcurrent relays (see 6.9);

-- it adds table titles for Table 1 and Table 2 and changes the content of Table 1;

-- it changes the relevant content in Annex A to the former standard by moving it to Clause 3;

-- it changes Annex B to the former standard into the informative annex "periodic inspection record sheet" and adjust it to be Annex A.

1 Scope

This Standard specifies the safety requirements for management, operation, inspection and maintenance of hand-held motor-operated electric tools (hereinafter referred to as tools).

This Standard applies to the management, operation, inspection and maintenance of hand-held motor-operated electric tools.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced documents (including all amendments) applies to this document.

GB/T 3883.1-2014, Safety of motor-operated hand-held, transportable electric tools and lawn and garden tools - Part 1. General requirements

3 Terms and definitions

For the purposes of this document, the terms defined in GB/T 3883.1-2014 apply.

5 Operation

6 Inspection and maintenance

6.1 When tools are sent out or received, storemen shall carry out one routine inspection; before use, operators shall carry out routine inspection.

Between enclosure and metal parts isolated from live parts only using basic insulation in class II tools

f) tools passing periodic inspection shall be labelled with inspection "pass" marking at appropriate location of tools. The "pass" marking shall be distinctive, clear and correct, at least including.

1) the number of tools;

2) the name or sign of inspection organization;

3) the name or sign of inspection personnel;

4) the effective dates.

6.4 Tools which are not used for a long term, shall be subjected to the measurement of insulating resistance before operation. If the insulating values are smaller than the values specified in Table 1, they shall be subjected to drying treatment. They shall only be used after they pass the inspection and are labelled with the "pass" marks.

6.5 In case of any insulation damage, fracture of power lines' sheath, falling-off of protective earth lines, crack of plugs and sockets or mechanical damage detrimental to safety, etc., it shall be repaired immediately. Before repair, their use shall not be continued.

6.6 The maintenance of tools shall be carried out by a maintenance organization approved by their manufacturer.

6.7 User and maintenance department shall not change the original design parameters of tools randomly, nor use alternative materials inferior to original materials used or parts not in conformity with the original specifications.

6.8 During maintenance, the insulating liners and buses in tools shall not be dismantled or omitted randomly; the power lines of tools shall not be replaced randomly.

6.9 After the electrical insulation parts of tools are repaired, in addition to the requirements of 5.1, 5.4 and 6.3 e), they shall also be subjected to the dielectric strength test in accordance with the requirements of Table 2. the waveform is of actual sinusoidal wave; the voltage is at a frequency of 50 Hz; the duration is 1 min. During the test, no flashover or breakdown will occur. […]