How to Easily Identify Cable Fault Points Without Cable Fault Tester

The identification of cable fault points has always been a difficulty. Once common problems occur in cables and wires, it will cause large-scale power-off of the whole line or part of the line, and immediately cause economic losses to power consumers. Therefore, the faster to find out the detailed address and causes of safety production accidents, eliminate safety risks, reduce the level of power-off of safety production accidents, and repair the plug-in wires as soon as possible, It can reduce the mutual economic losses of power supply and consumption consumers. How to find out some simple cable faults without cable fault tester: 1. The common problems of the line are stopped, and the maintenance attitude is skillfully identified; 2. Check the front-end engineer of quick break attitude, which is about half of the total length; 3. The over circulation value is small, and the common problems are far behind; 4-speed short overcurrent is the same as power tripping, and the common problem is in the middle of the line. 5. Safety production accidents are caused by different regions of the line, and the posture of relay protection equipment is different. Power tripping in the maintenance attitude of power flow cut-off: power flow cut-off generally causes short-circuit fault under the system operation mode. In case of common faults, the maintenance level is large, accounting for about 50% of the total length of the line. When the line is in small operation mode, the maintenance level is small, accounting for 15% 20% of the total length of the line. Therefore, if the attitude of the power output cut-off protection device trips, it indicates that the common problem point is generally located in the front development of the line (close to the distribution station). 6. Over current flow maintenance and machine equipment attitude tripping: the maintenance level of total over current flow maintenance is 100% of the maintained line. However, the general overcurrent maintenance machinery and equipment are also equipped with time-delay relay. When it is used in cooperation with the quick break protection device, it usually trips when common problems are caused in the rear section of the line. 7. Maintenance of power output and over-current flow. In addition, power tripping: this kind of situation generally indicates that the common problem points are located at the mutual level of quick break maintenance and over-current flow maintenance, and most of the common problem points are located in the middle of the line. Do not use the cable fault tester to solve the difficult problems. After the knife switch of the distribution station trips, immediately investigate the posture of the relay protection device. According to the attitude types and characteristics of relay protection equipment, the characteristics and levels of common problems are preliminarily agreed.

How to Easily Identify Cable Fault Points Without Cable Fault Tester 1

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Theory of Cable Fault Locator
The basic function of cable fault locator is in the power industry and some industries using cables, especially in some complex power systems. It is very difficult to find the fault of underground cable lines. However, in this regard, the continuous emergence of equipment with various functions and simple operation can not only reduce the high cost of fault detection, but also reduce the inevitable long-time power failure when difficult to find (cable fault locator) cable fault, which brings a lot of convenience to troubleshooting. Direct buried cable fault detection in underground direct buried cable and underground residential power distribution (URD) system is a very time-consuming thing, and will cause very inconvenient power failure to users. Some technologies may also damage the cable. For some equipment with high technical requirements, its operation is more complex, and only operators with strict training can use it, which brings a lot of inconvenience to the popularization and application of this kind of technical equipment. Therefore, the selection of appropriate technology depends partly on the knowledge of cable system design understood by the designer of fault detector, and also partly on the professional and technical knowledge of equipment and operators in this regard. With appropriate equipment and professional technology working on site, it is the first step to detect faults quickly and effectively. Hammering (pulse) method many power companies use hammering (pulse) method. This technique is effective in detecting high resistance faults in a simple (cable fault locator) cable system. The hammering method includes using a pulse or impulse voltage to impact the power cut cable. When an effective high voltage pulse strikes the fault area, the fault point flashover and produces a hammering sound that can be heard by the operator along the cable surface. However, detecting cable faults often requires several hammers, and repeated shocks may damage the cable. Dear customers: Hello, our company is a high-quality development group with strong technical force, providing users with high-quality products, complete solutions and superior technical services. The enterprise adheres to the tenet of building a business in good faith, keeping the business with quality and developing the business with enterprising. It continues to climb new peaks with a firmer pace and make contributions to the national automation industry. New and old customers are welcome to buy their favorite products at ease. We will serve you wholeheartedly!
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