How Does the Power Cable Fault Tester Detect the Fault Point

How to detect the fault point of power cable fault tester: it is composed of notebook computer, test system, path signal generator, path signal receiver and positioning instrument. It can complete the two tasks of cable fault test and cable data management. Notebook computer for measurement control, data processing and cable data management. The fault test system can measure the distance between the fault point and the test end at one end of the fault cable, and can also be used to measure the length of the cable and the propagation speed of radio waves in the cable. The path signal generator can generate 15KHz, * large amplitude 30V intermittent sine wave signals for finding cable paths. The path signal receiver is used to receive the path signal, find the cable direction and estimate the buried depth of the cable. The locator is used to locate the fault point. Technical performance of power cable fault tester 1. Fault test system ● it can test various faults of various power cables and open circuit and short circuit faults of communication cables and local telephone cables. ● the speed of radio wave propagation in any cable of known length can be measured. ● test distance: not less than 40km ● system error: less than 0.5m ● sampling frequency: 25MHz ● test blind area: less than 5m ● power supply: AC 220V ± 10% 2. Pathfinder signal generator. ● signal frequency: 15KHz ● oscillation mode: intermittent ● output power: 30W ● power supply: 220V ± 10% 2. Test sensitivity of power cable fault tester: the signal source with 50 Ω internal resistance outputs 300Hz signal, and the input signal of the pointing instrument shall not be greater than 10 when the output is maintained at 2V and the signal-to-noise ratio is better than 20:1 μ V。 ● input impedance: not less than 1.2k Ω. ● use 2 × 2000 Ω headphones. ● working voltage: 9V ± 10%. ● operating ambient temperature: - 10 ℃ 40 ℃

How Does the Power Cable Fault Tester Detect the Fault Point 1

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