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 Tester Manufacturer
Question: Do you know the main points of the cable fault tester? Answer: The cable fault tester is a comprehensive set of equipment, which can be used for open circuit, short circuit, grounding, low resistance, high resistance flashover and high resistance leakage of power cables Fault test, and the same question: Do you know the main points of the cable fault tester? Answer: The cable fault tester is a comprehensive set of equipment, which can be used for power cable open circuit, short circuit, grounding, low resistance, high resistance flashover It can also test the open-circuit and short-circuit faults of coaxial communication cables and local telephone cables. It can also test the cable path, burial depth, and radio wave speed, verify the cable length, etc., and can establish a cable file to facilitate Daily maintenance management. In the process of use, we need to pay attention to the following points to ensure the stability of the equipment, including: 1. During the pulse method test, pay attention to throw away all the equipment in the office and measure on the outside line. 2. When using the flashover method to test, the trigger working mode switch must be placed in“Flashover”Location.
3. Pay attention to personal safety and equipment safety when using the direct flash method or the dash flash method for testing. The ground wire must be connected. 4. After the flashover test is over, cut off the power supply, remove the connecting wire between the instrument and the high-voltage test device, and then discharge the stored charge of the high-voltage capacitor and cable.
When discharging, a current limiting resistor R should be added to limit the discharge current to discharge the current slowly. After the voltage on the capacitor is reduced, the resistance in the discharge circuit to the ground is zero, and the instantaneous discharge current can be as high as several hundred amperes, which will cause serious damage. equipment or personal accident. 5. During the direct-flash test, attention must be paid to monitoring the leakage current of the fault. If the current suddenly increases and the fault flashover has not occurred, the test voltage should be lowered immediately and the flash-over test should be used instead.
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