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–Cable Length Tester
Nowadays, the development of power systems has become more and more complete, and the demand for cables in the market is also increasing. Today, the editor will mainly talk about the three solutions for the live cable identification instrument to solve whether the cable is live, including the identification of the live cable's path-finding live cable. Nowadays, the development of the power system has become more and more complete, and the demand for cables in the market is also constantly increasing. Today, the editor will mainly talk about three solutions for the live cable identification instrument to solve whether the cable is live, including the identification of the live cable's path-finding live cable, and the path-finding and identification of the 50Hz running cable, if you are also interested in this aspect. , keep reading.
1. Can the identification problem of live cables be solved? The answer is yes. Routing of live cables Identification of live cables, and routing and identification of cables running at 50Hz. These are the three solutions for the live cable identifier to solve whether the cable is live.
Routing of live cables: The transmitter is clamped on the cable through the coupling clamp, and the transmitted signal of the transmitter can be coupled to the cable (whether the cable is running or the cable is powered off). Through the cable identifier receiver, we can find the underground direction of the cable and find out the source of the cable. Recognition of live cable: clip the transmitter on the cable through the transmitting clamp, and connect the receiver with the receiving clamp at the exposed part of the cable at the other end.
At this time, according to the signal, it can be judged which one is the signal cable. (This method needs to be equipped with a special receiving clamp). Searching and measuring 50Hz signal: It has the function of searching and measuring 50Hz signal, which greatly strengthens the judgment function. We can use the receiver to judge the cables with 50Hz signal in the cable group one by one (the cable with 50Hz signal is not necessarily a running cable).
Through the comprehensive judgment of the above three methods, we can easily judge the live cable and the non-live cable. 2. Why can't the passive live cable identification instrument be used to determine whether the cable is a running cable? The main reasons are as follows: Everyone knows that the principle of the live cable identification instrument is: when there is a power supply 50HZ current flowing through the running cable, it will A magnetic field is generated alternately along the running cable, and the live cable can be detected by detecting the alternating magnetic field. However, misjudgment occurs when the following situations occur: If the running cable has voltage and no load, there is no current flowing through the cable, and the magnetic field cannot be detected at this time. sentence.
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 cable identification instrument will also indicate. Misjudgment will occur. 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.
In the case of misjudgment, it is very easy to cause personal injury. Well, the above list is the solution of whether the cable is live or not by using the live cable identifier. I hope it can help you.
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