NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–CCTV Tester
Question: Judging the live and non-live cable problem solution of the cable identification instrument Answer: In the face of complex and different cables, the difference in operating environment, and the identification of running cables, but in actual work, it is often required that cable identification must be live identification Question: Judging the live and non-live cable problem solution of the cable identification instrument Answer: In the face of complex and different cables, the difference in operating environment, and the identification of running cables, but in actual work, it is often required that cable identification must be live identification , then for the safety of the operator, how to ensure the correct operation of electrical equipment, etc. Recently, customers often ask about the identification of live cables, I hope we can provide a simple and practical live cable identification instrument, which can determine which one of a set of running cables is. Which is the live cable which is the dead cable. In fact, this is a simple and complex problem. In general, we judge the 50HZ alternating current on the live cable by identifying the complexity. However, in some special cases, this method will lose its effect. The reasons are as follows: 1. If the cable is operated When there is voltage and no load, there is no current flowing through the cable. At this time, the magnetic field cannot be detected, and it is thought that it is an uncharged cable, which is very prone to misjudgment. 2. If the cable is not running, but if this cable is in parallel with other running cables, an induced current will be generated, and the induced current will also generate a magnetic field. At this time, the meter will also have an indication. misjudgment occurs.
3. If there are multiple cables in the cable trench, these multiple cables will generate a magnetic field. At this time, there will be a magnetic field generated by a 50HZ current in the entire area. At this time, there will be a magnetic field in the entire area, making the judgment impossible. Misjudgment is easy to occur. The only consequence of misjudgment is personal injury.
Can the live cable identification problem be solved? The answer is yes. Our company's new model GDBN-013 live cable identification instrument has the functions of routing of live cables, identification of live cables, and routing and identification of cables running at 50Hz. (See the description of GDBN-013+ for specific indicators.) If the above functions are used interchangeably, the problem of live cable identification will be simple.
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