Summary of Finding Methods for Power Cable Fault Points

Author: Noyafa–Cable Tester Manufacturer

Cable fault intelligent tester Power cable fault point finding method Summary The cable fault intelligent tester is actually in the process of maintenance and repair, and the most feared thing since the maintenance staff is to encounter the brake in the wire and cable. Can't find the autumn equinox in the place of oops . Despite the fact that our weak current project is really repaired, when we encounter the subject of optical cable, we will directly think of a way to change the line or re-pave it. Only we are talking about the technical method today. Why not measure the dots of the optical cable! When the electrolyte in the cable breaks down, it is very important to watch the exact position when the outer surface is covered with insulation, including strong and weak currents. Usually, the thought of finding the focus is branched and checked. According to the middle of a cable, there is a blockage, why not measure from the two ends and the middle point respectively, which side is blocked, and then take the middle point to measure, and so on, you can quickly find the breakpoint position by checking the abbreviated limit.

So under normal circumstances, what is the measurement method to accurately measure the breakpoint of the wire and cable? How to measure the breakpoint of the wire and cable? These several common methods can help you 1. Multimeter detection method: First, take the whole cable that does not work on the front line of the strong electricity unilaterally, and leave the other side empty. Turn the multimeter to the AC2V gear, start from the cable connection end, hold the black pen tip, and slowly move the red pen along the insulation of the wire, at this time, the voltage value displayed by the multi-screen is about 0.445V. When the red test pen moves to a certain place, the voltage displayed on the display screen suddenly drops to 0.0 volts, which is about one-tenth of the original voltage. The breakpoints are around 15cm from the post (the leading edge junction).

2. The inductive electric pen detection method responds to the electric test pen, that is, a device with an electronic touch screen, which is enough to detect voltage and on-off. First, the wires in the outskirts of the breakpoint wire have power supply, and then connect the cable with breakpoint to the leading edge, place the sheep centimeter perpendicular to the wire, press and hold“Induction breakpoint test”The button moves forward slowly on the wire, and when the AC signal detected by the test pen suddenly appears and disappears, it can be seen that the breakpoint is at the detection point, and the error does not exceed 10cm at most. What I want to be careful about is that the wires around the breakpoint wire cannot contain power.

In addition, it should be awakened that this method is wrong to open the bow left and right, the effect of short cables is obvious, and the longer the cable, the worse the effect. 3. Use the audio detector The audio detector is an instrument that uses single frequency or multi-frequency signals to test the continuity of the line to identify line faults. Can go straight to find the line in the case of continuous another switch, router, PC limit.

When tracing the wire and line, it is not necessary to peel off the floating skin of the path. It is simple and efficient, and there is no position to identify the line breakpoint. 4. The cable fault detector is a comprehensive set of wire fault detection instruments. It can test the high-resistance flashover fault of the cable, the resistive grounding of the volume, the disconnection and the disconnection of the cable, and the fault of the poor contact.

It is especially suitable for testing various types of power cables and communication cables with different differential voltages. 5. The broken line detection method connects the wire with the breakpoint to the black test lead of the multimeter in one direction, and the red test lead on the other hand. Multimeter hit the resistance 200Ωfiles.

Return bends at the places most likely to break (step-by-step frequent bend points). If the multimeter indicates that it is on and off, this is the breakpoint. If you can't see it clearly, you need to start bending from one side of the wire until you find the breakpoint.

This method is suitable for shorter cables. 6. Acupuncture detection method This method is a harmful detection method. A gold needle is placed on the branch of the broken wire, and a multimeter is used to measure the continuity between the steel needle and the cable end to judge the breakpoint of the cable. It is not recommended to use under normal circumstances, because it will damage the insulation layer, and it is easy to cause any problems in the use of cables in the end, especially in environments with high humidity.

This method is to use the on-off of the wire to check the full breakpoint of the wire. 7. One of the detection methods for pulling cables is also a detection method with damage. Generally, absent is used in practice, but it is also listed as a co-organization method. Use a vise to pull out the broken wire at the end of the cable, such as a breakpoint. In the vicinity of the end of the cable, the insulation can be easily pulled off. This method is used to break the adjacent cable at the end of the cable.

The method of finding the fault point of the power cable summarizes the cable fault intelligent tester Shenzhen Noyafa Electronic Technology Co., Ltd.