Mechanical injury:

1. Before use, you must confirm that the wrench is a qualified wrench, labeled or certified.

2. Before use, it must be checked that the nuts of the mechanical transmission parts are firmly fastened and can only be used after passing the test.

3. The power plug must be unplugged before replacing the wrench to replace it.

4. The wrench must be securely fixed during use, and the hands must be firmly held (in special cases, the wrench can be lifted and fixed) to prevent the danger of the tool being detached.

5. Before starting the machine, you must determine the direction of rotation, and then confirm that there is no abnormality before working. The working force should be even, and the force is too strong.

6. Work must be more than 2 people, the special person operates the operation box to control the work and stop of the electric wrench.

7. When using, the wrench should be supported. Avoid touching the wrench to prevent the cable from falling off.

8. The body must maintain a proper correct posture during work and must stand firm so that the tool axis is aligned with the thread axis and held firmly.

9. Before turning on the power, you must carefully check that the switch of the tool you are using should be in the off position before you can turn on the power.

10. The tool used must be placed in a safe and secure position after the switch has been completely stopped, and then the plug is unplugged.

11. When working vertically, two or more people must hold the tool and the third person should operate.

12. There must be more than 2 people working at the time, and special personnel should be on uninterrupted supervision.

2. Lightning surge immunity test level:

The severity of the test is divided into 1, 2, 3, 4 and X grades. The first-order parameters of the power line differential mode test were not given, and the remaining levels were 0.5kV, 1kV, 2kV and to be determined. The parameters of the power line common mode test are 0.5kV, 1kV, 2kV, 4kV and to be determined.

The severity of the test depends on the environment (the environment subject to the possibility of a surge) and the installation conditions, which are generally classified as follows.

Level 1: A well-protected environment, such as a control room in a factory or power station.

Level 2: A protected environment, such as a factory without strong interference.

Level 3: Ordinary electromagnetic disturbance environment, no special installation requirements are specified for the equipment, such as cable network installed in general, industrial workplace and substation.

Level 4: Environments subject to severe harassment, such as civil overhead lines, unprotected high-voltage substations.

Class X: Special grade, determined by the user and the manufacturer.

When the switching power adapter is tested by EMC, the lightning surge test level is: line-line is level 2, line-to-ground is level 3.

Concerned about surprises

Tag: Electric wrench Common mode Operating box Leakage protector Action time

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