Time: 2022-07-01 Author: 铧正 Click: 301 Time
When using the intelligent cable fault tester to test the fault, the power personnel should locate the fault within 1 meter, which is convenient and accurate. There is no need to excavate the pavement multiple times, which can save a lot of manpower, material resources and financial resources, as well as save maintenance costs. Help everyone make better use of cable fault detectors.
After you get the cable fault tester, you should perform a self-test. First, insert the headset into the register, turn on the power switch, the power indicator light is on, indicating that it has entered the working state. Put on the headset, press your finger on the red terminal, you will hear a beep in the headset, indicating that the machine is working properly. Then insert the red and black detection wires into the collimator.
First, before testing. First find out the nature of the fault of the leakage circuit. If only the insulating rubber is damaged, there is leakage (discharge) to the ground, but the line is not short-circuited, and the line can be routinely powered and detected when the line is disconnected.
If there is no line short-circuit and there is no short-circuit to the ground or no short-circuit between the lines, the insulation performance is good, and when there are some short-circuit points to the ground, the line under test and all the lines, a third-tier city or a fourth-line can be connected to the circuit. Single-phase power transmission work for analysis and detection
If the insulation to the ground is good, the single-phase feed point detection can be performed on a single short-line for the fault of the inner core short-line.
Above the buried thread, probe from one part of the thread to the other, and walk slowly forward. On well-insulated lines, the headphones are essentially silent. At the same time, the light-emitting tube turns on or off the light. When approaching the fault point c, the sound gradually increases from small to loud, one light-emitting tube turns into two and three light-emitting, when it reaches the fault point a, the sound is the loudest, at this time the light-emitting tube is bright, when the light-emitting tube crosses the point a to At point b, the sound gradually decreases to disappear, and the light-emitting tube gradually brightens to completely extinguished. Then go back to the loudest point a, the point of failure.
Note: After detecting for a period of time, it is found that the indicator light is not very bright, and you must charge it yourself before analyzing and measuring. Otherwise, the power of the detector will greatly improve the detection accuracy. If there are too many leakage faults through buried wires, or if the power supply cannot be satisfied through buried wires, a signal transmitter can be added to detect.
When using a signal to pass through the transmitter, the high-voltage control line under test should be connected with the high-voltage first. The problem is all disconnected. Then connect the red terminal of the signal transmitter to the buried wire, which requires one data or more lines, 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 a screwdriver, plugged into the ground, and raised in contact with the ground). According to the above research steps, the detection can be realized.
The normal power-on detection can only use the detector. After the power-on, the detector can directly detect where the voltage signal of the line is transmitted and disconnected. But when power is not available, install a signal transmitter, which can send a pulse signal to the wire, which can be understood as supplying power to the wire, and then test it.