China power tools motor suppliers guarantee the safety of the motor. The insulation resistance of the power tool should be measured with a 500V megohmmeter on a regular basis. If the insulation resistance between the live parts and the shell does not reach 2MΩ, it must be repaired.
1. After the electrical part of the power tool is repaired, insulation resistance measurement and insulation withstand voltage test must be carried out. The test voltage is 380V and the test time is 1 minute.
2. Separate switches or sockets should be provided for the electrical circuits connecting electric machinery and tools, and a leakage current action protector should be installed. The metal shell should be grounded; it is strictly forbidden to connect multiple devices with one switch.
3. The rated leakage operating current of the current type leakage protector shall not be greater than 30mA, and the action time shall not exceed 0.1 second; the rated leakage operating voltage of the voltage type leakage protector shall not be greater than 36V.
4. The operating switch of the electric tool should be placed within the reach of the operator. When there is a sudden power failure during break, get off work or work, the power side switch should be cut off.
5. When using portable or mobile power tools, you must wear insulating gloves or stand on insulating mats; when moving the tools, do not carry the wires or the rotating parts of the tools.
6. When using Class III insulated electric tools on wet or acid-containing sites and in metal containers, reliable insulation measures must be taken and special personnel must be assigned to supervise them. The switch of the power tool should be located within the reach of the guardian.
7. The disk plane of the magnetic chuck electric drill should be flat, clean, and rust-free. When performing side or overhead drilling, measures should be taken to prevent the drill body from falling after power failure.
8. When using an electric wrench, the reaction torque fulcrum should be firmly secured and the nut can be tightened before it can be started.
