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–POE Tester
Power cable fault comprehensive tester Power cable fault tester How to find the fault point of the cable fault tester? When an accident, obstacle or abnormal situation occurs in the transmission line, the line operation and maintenance personnel should find out the fault point in time and accurately, and determine the cause of the accident. How to find the fault point of the cable fault tester? When an accident, obstacle or abnormal situation occurs in the transmission line, the line operation and maintenance personnel should promptly and accurately find out the fault point, determine the cause of the accident, and eliminate the defects in the process, which is of great significance to the safe and stable operation of the power system, and realizes multi-power, good power supply. Common fault types of transmission lines are single-phase grounding, two-phase short circuit, three-phase short circuit, two-phase grounding short circuit and three-phase grounding short circuit. The main causes of the above failures generally include pollution flashover, breakdown, creepage discharge of insulating supports, bird damage, snake damage and other small animal disasters, tree obstacles, fallen poles, broken wires and external force damage.
The point of failure should be carefully checked. Determine the type of fault according to the fault phenomenon, meteorological conditions and equipment health level, and analyze the cause of the accident according to the type of fault. Finally, determine the fault area and find the fault point according to the possible cause of the accident.
Power cable fault comprehensive tester Power cable fault tester During normal operation and maintenance, the line operation management department should determine the special area of the line according to the equipment conditions, terrain along the line, surrounding environment and meteorological conditions. Special areas generally include pollution areas, lightning strike areas, flood erosion areas, wind damage areas, bird damage areas, line oscillation areas, land subsidence areas, ice damage recovery areas and areas vulnerable to external force damage. This method has been outdated for a long time.
The hz tc cable fault tester produced by our company adopts the principle of time domain reflection (TDR) to measure the cable fault distance. For low-resistance and open-circuit faults, the instrument sends a series of electrical pulses to the cable under test, and the faulty cable produces a reflected signal at the fault point (if there is no cable fault, the reflection is the full length of the cable); for high-resistance faults, a The impact of the negative DC high voltage makes the fault point generate reflected pulses. According to the time difference between the transmitted pulse and the reflected pulse and the propagation speed of the radio wave in the cable, the distance from the fault point to the test end can be quickly and accurately measured, saving manpower and material resources and saving maintenance costs.
Power cable fault comprehensive tester Power cable fault tester At the same time, in the process of finding faults,“Sanqin”,Right now“Leg work, mouth work, brain work”“leg work”Don't be afraid to walk, check the line in place, don't go through the motions, don't walk around.“mouth diligence”It is to ask the surrounding residents, pedestrians and the public whether there is any abnormal sound when the fault occurs, what light or sparks are seen, etc., especially in some special areas where faults may occur.“The brain is hardworking”It's all about thinking and analyzing problems with your brain. have“three services”, we can follow“One look, two listens, three questions and four tests”method, run the maintenance program item by item, and quickly find out the point of failure“Look”Refers to carefully checking whether there is any abnormality in the transmission equipment towers, wires, porcelain bottles, and grounding down-conductors, etc.“listen”Refers to carefully listening to the transmission equipment for abnormal noise,“ask”means to understand and ask people,“test”Refers to electrical instruments and instruments that cannot be observed with the naked eye to inspect and measure the defects of power transmission equipment.
Power cable fault comprehensive tester How does the power cable fault tester find the fault point of the cable fault tester? Shenzhen Noyafa Electronic Technology Co., Ltd.
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