Q&A on Cable Testing Equipment

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Author：Henan Shenghua Click： Time：2019-11-03 00:00:00

First of all, let's introduce what is the spark machine, which is a cable equipment, as shown in the following figure

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The structure design of the spark machine is advanced, and the detection sensitivity is also very high. It can directly carry out online testing on the equipment such as the winch and the extruder, and can also be used for the intermediate testing and factory inspection of the product.

Usually when working, the spark machine is grounded, and many workers who have worked for many years do not understand why the spark machine should be grounded.

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According to the working principle of the spark machine, it can be found that if the cable is not grounded, it only works on the line with serious copper leakage and slow traction speed when checking the cable. Because of the serious copper leakage and slow speed of the line, the high frequency and high voltage can fully discharge the metal conductor, resulting in a detectable voltage difference. However, for those with stomata, serious eccentricity has not yet leaked copper, the traction speed is faster, or it may not be detected due to insufficient discharge.

If we ground the wire for the spark machine, so that those with stomata, serious eccentrism has not leaked copper, traction speed of the line discharge, you can form a closed loop through the earth to speed up the discharge to ensure that it produces detectable pressure difference. Prevent leakage test.

Therefore, according to the above principles and the equipment itself, we can summarize the two reasons for the grounding of the spark machine:

The grounding of the sparker box is to ensure the safety of the human body: because any electrical appliance has the possibility of leakage. When the spark box is grounded in its leakage, the leakage can be directly imported into the ground to ensure human safety.

The ground terminal of the spark machine and the other end of the core wire are grounded, so that the current can be connected to the ground through the conductor, and the current forms a closed loop, so that the count is accurate to prevent leakage.

It is recommended that the following points should be noted when using the spark machine:

1. The box of the spark machine must be grounded.

2. The ground terminal of the spark machine and the other end of the core wire (that is, the end of the core spool) must be grounded.

3. The voltage setting value of the spark machine should be appropriately larger than the standard.

4. The winding speed should not be too large.

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Q&A on cable testing equipment

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