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
Electrical workers use a smart cable fault tester to test faults, which is very convenient and accurate to locate within one meter. There is no need to excavate the road many times, which can save a lot of manpower, material resources and financial resources, and also save the maintenance cost. To help everyone better, electrical workers use the smart cable fault tester to test the fault, which is very convenient and accurate to locate within one meter.
There is no need to excavate the road many times, which can save a lot of manpower, material resources and financial resources, and also save the maintenance cost. In order to help you make better use of the cable fault tester, here I will share some relevant suggestions for you. After we get the cable fault tester, the instrument should self-check.
First insert the headset into the calibrator, turn on the power switch, the power indicator light is on, indicating that it is in working state. Put on the earphone and press the red binding post on the top with your finger, you should hear a buzzing sound in the earphone, indicating that the machine is working normally. Then plug the red and black probe wires into the calibrator.
First before detection. It is necessary to first clarify the nature of the fault of the leakage circuit. If only the insulating rubber is damaged, it leaks (discharges) to the ground but the line is not short-circuited. When the line is not connected, it can be detected by conventional power transmission to the line.
If the line is short-circuited and has good insulation to earth leakage or no short-circuit between lines, and there are some short-circuit points to earth leakage, all lines, three lines or four lines of the line under test can be connected in parallel, and single-phase power transmission to the circuit for detection If the ground insulation is good, the short-circuit fault of the inner core can be detected by single-phase feed point detection for a single short-circuit. Above the buried line to be tested, detect from one end of the line to the other end, walk slowly forward, the earphone is basically silent in the line segment with good insulation to the ground, and the luminous tube lights up or does not light up, when it is close to the fault point C, The sound gradually increases from small to loud. One light of the light-emitting tube turns into two and three lights. When it reaches the fault point A, the sound is the loudest. At this time, the light-emitting tube is all on. When it crosses point A and reaches point B, the sound gradually becomes small and disappears. The tube is fully lit gradually to completely extinguished. Then return to point A where the sound is the loudest, which is the fault point.
Note: After detecting for a period of time, it is found that the indicator light is not very bright, and it must be charged before measuring. Otherwise, the power of the detector will greatly affect the detection accuracy. If there are too many leakage faults through the buried wire or the power supply cannot be supplied to the buried wire, a signal transmitter can be added to detect.
When using the signal transmitter, you should first disconnect the high-voltage line under test from the high-voltage connection. Then connect the red terminal of the signal transmitter to one or more of the buried wires, and the black terminal to the ground wire (in the case of no professional ground wire, the copper wire of the wire can be directly wrapped around the ground wire. on the screwdriver, plug it into the ground, and make contact with the ground). Then follow the above steps to detect.
Normally, only the detector can be used for power-on detection. After power-on, the detector directly detects where the voltage signal of the detection line is broken. However, when it cannot be powered on, a signal transmitter is used, and it can send a pulse signal to the wire, which can be understood as a power supply to the wire and then the detection. I believe that after reading the above content shared by Xiaobian, you should know how to use the cable fault tester correctly.
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