1. The single-phase power cable of the mobile electric machine and the hand-held power tool must use a three-core soft rubber cable. The three-phase power cable must use a four-core rubber cable. When wiring, the cable sheath should be inserted into the junction box of the device. Be fixed.
2. The following items should be checked before using the power tool:
(1) The outer casing and the handle are free from cracks and damage;
(2) The protective grounding wire or the connecting neutral wire is connected correctly and firmly;
(3) The cable or cord is intact;
(4) The plug is in good condition;
(5) The switch operation is normal, flexible, and free from defects;
(6) The electrical protection device is in good condition;
(7) The mechanical protection device is in good condition;
(8) The rotating part is flexible.
3. The insulation resistance of the power tool should be measured periodically with a 500V megohmmeter. If the insulation resistance between the live parts and the outer casing is less than 2MΩ, it must be repaired.
4. After the electrical part of the power tool is repaired, the insulation resistance measurement and the insulation withstand voltage test must be carried out. The test voltage is 380V and the test time is 1 minute.
5. The electrical circuit connecting the electric machine and the tool should be separately set with a switch or socket, and a leakage current action protector should be installed. The metal casing should be grounded; it is strictly forbidden to connect multiple devices.
6. The rated leakage current of the current leakage protector shall not exceed 30mA, and the action time shall not be greater than 0.1 second; the rated leakage current of the voltage leakage protector shall not exceed 36V.
7. The operating switch of the motor unit should be placed at the reach of the operator. When there is a sudden power outage during rest, off work or work, the power side switch should be turned off.
8. When using portable or mobile power tools, you must wear insulated gloves or stand on the insulating mat; when moving the tool, do not carry the rotating parts of the wires or tools.
9. When using Class III insulated power tools on wet or acid-containing sites and in metal containers, reliable insulation measures must be taken and personnel supervision must be provided. The switch of the power tool should be located within the reach of the guardian.
10. The disk surface of the magnetic suction cup drill should be flat, clean and rust-free. When sidetracking or back-drilling is carried out, measures should be taken to prevent the drill body from falling after power loss.
11. When using the electric wrench, the anti-torque fulcrum should be fastened and the nut should be fastened to move.
Zinc coating is a type of protective coating that is commonly used on metal surfaces to extend their durability and prevent them from corroding or rusting. It involves the application of a thin layer of zinc onto the surface of metal parts through a number of processes, the most common of which is hot-dip galvanizing.
The benefits of zinc coating are many. It offers excellent corrosion resistance, making it ideal for outdoor applications where metal parts are exposed to harsh weather conditions. Zinc coating also provides a smooth and uniform finish, which enhances the appearance of the metal and makes it more visually appealing. In addition to this, zinc coating improves the overall performance of the metal part by increasing its resistance to wear and tear.
Zinc coating is used in a variety of industries and applications, including construction, automotive, and manufacturing. In the construction industry, it is used to protect steel structures such as bridges, buildings, and pipelines from corrosion. In the automotive industry, it is used to protect metal components such as car frames, exhaust systems, and suspension parts. In the manufacturing industry, it can be used to protect machinery and equipment parts from rust and corrosion.
In conclusion, zinc coating is a highly effective and versatile technology for protecting metal parts from corrosion and rust. Whether for outdoor or indoor applications, it offers numerous benefits in terms of performance and durability. As such, it is an essential process for enhancing the longevity and reliability of metal parts across a range of industries and applications.
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