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Shop Best Cable Tracker Tester in NOYAFA

2021-10-23
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SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED is committed to delivering quality cable tracker tester and suchlike products to meet or exceed customer expectations and is continually focusing on improving manufacturing processes. We are achieving this by monitoring our performance against our established objectives and identifying areas in our process that need improvement.NOYAFA has done a great job in achieving high customer satisfaction and greater industry recognition. Our products, with the increasing brand awareness in the global market, help our clients create high levels of economic value. According to customer feedback and our market investigation, our products are well-received among consumers for the high quality and the affordable price. Our brand also sets new standards of excellence in the industry. At Best Cable Tester Supplier in China _ Noyafa, we measure our growth based on our products and service offerings. We've assisted thousands of customers to customize cable tracker tester and our experts are ready to do the same for you.
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Power Cable Fault Location Method
Power Cable Fault Location Method
Fault location method of power cable: Aiming at the problem that it is more difficult to determine the fault location of buried power cable than overhead line, this paper selects a representative example of fault location process of 10 kV cable in case of high resistance fault, and introduces the method of locating and locating the fault point by using secondary pulse method according to the fault nature. For the high resistance fault during cable operation, first consult the relevant data of the cable and master the detailed information of the cable; Use multimeter and insulation resistance meter to judge the cable fault type, and determine the corresponding test method according to the fault type; Use the fault tester to test the length of the cable, check whether the test results are consistent with the data, and preliminarily determine the distance of the fault point; Finally, the secondary pulse method is used to accurately locate the fault point, find out the fault point, peel off the cable and find out the cause of the cable fault, so as to take corresponding preventive measures. This method is easy to master, especially for short-distance faults, the test waveform is easier to analyze, and the fault distance can be determined quickly, which makes the cable test more efficient and the fixed-point positioning time shorter. Power cable faults are complex and diverse, which can be divided into open faults and closed faults according to fault surface phenomena; According to the grounding phenomenon, it is divided into grounding fault, phase to phase fault and mixed fault; According to the fault location, it is divided into joint fault and cable body fault; According to the nature of resistance, it is divided into broken line fault, mixed line fault and mixed fault. Among them, mixed line fault is divided into low resistance fault, high resistance fault and flashover fault. 1. Fault detection methods for different cable faults, the common detection methods include low voltage pulse method, pulse current method, secondary pulse method, bridge method, pulse voltage method, etc. [3]. This paper only introduces the three commonly used detection methods. 2. Low voltage pulse method low voltage pulse method is suitable for detecting low resistance fault (short circuit fault with fault resistance less than 200 & omega;) and open circuit fault. It can also be used to measure the length of cable and the propagation speed of electromagnetic wave in cable, and distinguish the middle head, T-joint and terminal head of cable. 3. Pulse current method pulse current method generally includes impulse flash method and direct flash method. The linear current coupler is used to collect the current traveling wave signal in the cable and generate the fault test waveform, so as to judge the fault condition and measure the distance between fault points through the waveform. The direct flash method is used to detect flashover breakdown faults, that is, the resistance at the fault point is very high, and flashover breakdown faults will occur when the voltage is raised to a certain value with high-voltage test equipment. The impulse flashover method is also suitable for testing most flashover faults. Because the waveform of the direct flashover method is relatively simple and it is easy to obtain more accurate results, the direct flashover method should be used as much as possible. 4. Secondary pulse method with the cooperation of high voltage signal generator and secondary pulse signal coupler, the secondary pulse method can be used to measure the fault distance of high resistance and flashover faults. The waveform measured by this method is simpler and easy to identify.
How to Diagnose and Solve Cable Leakage with Cable Fault Tester
How to Diagnose and Solve Cable Leakage with Cable Fault Tester
How can the cable fault tester diagnose and solve the cable leakage? As the main cable fault, when the power cable leaks to the earth, it will produce a strong to weak directed electric field gradient around the fault point on the ground. The amplitude and direction of the signal can be measured by Bao Shun Tong cable fault measuring equipment along the cable path. Before and after the fault point, the direction pointed by the galvanometer pointer is opposite, so as to find the fault point of the cable and achieve the purpose of accurate positioning. 1. Cable fault diagnosis depends on the nature of the fault. Cable fault can be divided into low resistance grounding or short circuit fault, high resistance grounding or short circuit fault, wire break fault, wire break and grounding fault and flashover fault. Cable fault diagnosis can determine the type and severity of cable fault, and it is also convenient for testers to test it with different test methods according to different fault types. For example, for high resistance faults, the impulse flash method can be used to locate the fault location. 2. Cable fault location. Cable fault location is also called rough measurement. There are two rough measurement and location methods: electric bridge method and wave reflection method. At present, wave reflection locator is more popular. However, several cable faults are difficult to find by wave reflection method, such as insulation defect points of high-voltage cable sheath, steel tape armored low-pressure cable, PVC cable and short cable can not be located. In addition, some high breakdown points cannot be broken down under impulse voltage and are difficult to locate. 3. Cable fault point. It is also called precise measurement. The cable fault can be accurately fixed through the methods of acoustics, electromagnetism, electronic signal processing and electronic cancellation theory. The LCD can display the sound pulse, magnetic pulse and the distance between the fault point and the probe test point at the same time. At present, the cable fault can be accurately fixed by the following four methods: (1) Acoustic measurement method: the high-voltage pulse generator discharges the fault cable, the fault point generates an arc and generates a discharge sound. When the cable is directly buried, it generates a seismic wave. The acoustic probe of the pointing instrument picks up the seismic wave signal and amplifies it and outputs it through the headset or meter head. (2) Step voltage method: it is mainly aimed at the fixed point of outer sheath grounding fault with requirements for cable outer sheath insulation. Now, step voltage method can also be used for the fixed point of some directly buried unarmored low-voltage cables and wire core grounding fault. (3) Electromagnetic method and audio method: fix the point with electromagnetic wave or audio method, that is, determine the fault point by using the change of electromagnetic wave signal or audio signal at the front and rear points of cable fault. (4) Acoustic magnetic synchronization method of cable fault tester: it is the comprehensive application of acoustic measurement method and electromagnetic wave method. Then, according to the above operation methods, we believe that the fault point can be found soon, and we can quickly repair and restore the normal operation of power.
Automatic Screwdriver Model Prototype
Automatic Screwdriver Model Prototype
This last week, I took on the challenge of designing and creating a low-fidelity model prototype of an automatic screwdriver with several features, such as an automatic screwdriver head selection mechanism and a screen which keeps track of how many screws have been screwed/unscrewed. The main goal was to make a tool designed like OXO, which is known for applying universal design principles to make well-designed and easy to use tools for cooking.PlanningTo start, I did a quick competitive analysis on other automatic screwdrivers to see what common design elements were used across this tool. Some were very simple and looked very similar to a normal screwdriver, but with a button to automatically unscrew/screw. Others were more advanced, having systems to change the overall shape of the screwdriver between a normal and a drill like shape or being turned on using a gyroscopic mechanism to tell which way you are turning the screwdriver. I really clung to the idea of being able to easily change between a traditional and drill shape, because that would make it a lot easier to use in several different positions and orientations. After deciding on my main design form, I wrote up a list of requirements that I wanted my design to be able to do. The main goal I had was for it to work and feel the exact same no matter shape it is in. To do this, I decided that the buttons, switches, and screens would work the exact same between the two different shapes. The most novel design choice that made this possible was to have 2 different screens: one on the end of the screwdriver that would be active when the screwdriver is in its normal shape and one in the middle of the screwdriver that becomes viewable when the screwdriver is in its drill shape. This way, the screen is easily viewable in both shapes, so the experience of using its features does not change between the two shapes. Though this may not be an especially cost-effective solution, it does make the screwdriver much more usable and adjustable. After deciding on my main requirements and design choices, I started to draw some quick sketches of how I wanted the screwdriver to look like. I also drew out what the different screens and touchable elements would look like.Initial PrototypeAfter drawing out my main ideas, I attempted to make my first prototype out of materials I had in my house, which only consisted of a few toilet paper rolls and a paper clip. I attached two toilet paper rolls with a paper clip, which I form to feel like a trigger, which would control the variable speed control. I also drew on buttons to act as a switch between screwing and unscrewing. I tried to use stick notes to imitate the screen, but they did not easily fit onto the ends of the toilet paper rolls. I tested this prototype in its different shapes and on different wall positions/orientations to confirm that the main actions (viewing the screen area, pressing the trigger, and switching the screwing direction) were easy to do while using it. I also made sure that these actions could be done easily whether the user was right or left handed.Second IterationOnce I confirmed the model and form was easy to handle and use in different positions, I reiterated on my prototype using stronger and more diverse building materials, like cardboard, tape, velcro, etc. In this iteration, I decided on the size of the model and the main types of buttons. The screwdriver is fairly large, but definitely still felt easy to grip, use, and easily access all the buttons/functionality. I felt like it would be large when actually created so that the top half could hold several different screwdriver heads and so that the screen would not be too small to see/interact with. I filled the empty middle parts of the model with pinecones to imitate the added weight and ability to tightly grip the model. I decided on a pressure-sensitive button for speed control instead of a trigger because it made the model easier to grip in different positions. I imitated this using a piece of paper that was scrunched to feel more like a spring. I made a switch using tape, paper, and a paper clip so that the user can easily switch between screwing and unscrewing during use. I made a hinge so that the model could easily switch between the two shapes, but it was slightly weak and did not hold its shape very well. I tried using magnets to have it hold its regular shape better, though they were not strong enough. I chose to do a final iteration of this design to fix this issue and to make it look cleaner overall.Final IterationMy final iteration cleaned up all the details from the second iteration and also created the main screens. In this iteration, I added colors to make it cleaner and signify the physical parts of the screwdriver you can interact with. I added velcro to the middle of the screwdriver so that the middle could easily change shapes and hold its form. I also added it to the bottom the bottom so that the model could easily fit into a new rechargeable stand I made for it. The velcro also had the added effect of making it easy to place and replace the paper screens I made to imitate the digital displays of the screwdriver. The digital displays would always be displayed on the screwdriver no matter what mode it was in. The digital display had two major functionalities: to allow the user to automatically change the screw head and to show the user the how many screws they have screwed/unscrewed. The head selection screen allowed the user to tap or swipe between different screw heads and different sizes for the screw heads. The screw counter screen allowed the user to see how many screws they had screwed/unscrewed, and reset each count individually on a button tap. The buttons at the bottom of each screen allow the user to easily switch between the two screens.User Test and CritiquesAfter completing my final iteration, I had a friend test out my prototype. First, I gave him the prototype and let him explore it and try and figure out what each major part of the screwdriver did. Then I gave him a fake task of trying to fix an amplifier using the model, with the added difficulty of starting out with the wrong screw head and size. He seemed to understand how to do the task and how to utilize my prototype to do so. This user test is available here. I also showcased my work to my class for feedback and critiques. For the most part, people thought my prototype was easy to use and enjoyed the novelty of it having two digital displays. Most people really liked that it was designed to be used in the same way for both different shapes. The only real critique I got was that one person could not easily grip the bottom. For a final product, I would make the bottom half get skinnier towards the middle while remaining larger at the ends. This way, it would be easier to grip while keeping the space at the ends necessary for the screens. Overall, I really enjoyed this exercise and the ability to iterate multiple times on my ideas. Using cardboard and other low-fidelity materials was really fun, but after seeing the creative ways my classmates utilized these materials, I think I could one day re-iterate on this project and make it look/feel even better
How to Test Your Cable/ Internet Connection: 3 Ways to Check That It's Working Or Not
How to Test Your Cable/ Internet Connection: 3 Ways to Check That It's Working Or Not
...Testing your cable/internet connection is very important, but there are three ways to test it and each of them will take a little bit of time and patience. If you have your cable/internet connection working then it will be ready to use, but if you have a problem with your cable/internet connection, you should test it first. Once you have found the problem with your cable/internet connection, you can take the cable/internet connection to a technician or look for a replacement.There are lots of ways to check your internet connection and a couple of methods that we could use would be through WIFI testers, Wire cutters and If you use your phone for internet browsing you should check that it's not a virus. Even if you do not have access to a smartphone you should check that your internet connection is working.Is your Internet connection not working as it should? Or maybe you have a problem with your cable? If you have problems with your cable, a few simple steps can be followed to see if it is working properly.... To test your cable/internet connection, do the following.In the UK and USA we have so many devices and computers connected to the internet. Most of these devices have a data plan that will provide you with a broadband connection. Some of these devices will allow you to access other internet services, like video streaming. If you have an unlimited data plan then it is a good idea to check the connection you have to see if it is working or not.This article is a great place to start if you're a blogger who wants to find out how to test your internet connection or cable. Even if you are in a business that relies on a cable connection or internet connection it is a good idea to check your connection at least once a week. It is the same for a phone line, even if you have an internet connection it is important to check it too. There are several ways to check your connection, you could get a signal on your phone but it would not give you the full picture, so you could get your signal on your computer. There are many ways to check your connection.
Cable Fault Detection and Search Method
Cable Fault Detection and Search Method
For direct short circuit or broken cable fault, the multimeter can be used for direct measurement and judgment; For indirect short-circuit cable fault and grounding cable fault, use a megger to telemeter the insulation resistance between core wires or the insulation resistance between core wires and ground, and judge the cable fault type according to its resistance value. The following describes the method of cable fault finding: zero potential method. Zero potential method is also known as potential comparison method. It is suitable for short cable core to ground fault. This method is simple and accurate, and does not need precision instruments and complex calculation. The measurement principle is as follows: connect the cable fault core wire in parallel with the comparison wire of the same length. When applying voltage ve at both ends of B and C, it is equivalent to connecting the power supply at both ends of two parallel uniform resistance wires. At this time, the potential difference between any point on one resistance wire and the corresponding point on the other resistance wire must be zero. On the contrary, the two points with zero potential difference must be the corresponding points. Because the negative pole of the micro voltmeter is grounded and equipotential with the cable fault point, when the positive pole of the micro voltmeter moves to the point when the indicated value is zero on the comparison wire, it is equipotential with the cable fault point, that is, the corresponding point of the cable fault point. S refers to single-phase knife switch, e refers to 6e battery or 4 No. 1 dry batteries, and G refers to DC microvolt meter. The measurement steps are as follows: 1) connect battery E on phase B and C core lines, and then lay a comparison conductor s with the same length as the fault cable on the ground. The conductor shall be bare copper wire or bare aluminum wire, with equal cross section and no intermediate joint. 2) The negative pole of the micro voltmeter shall be grounded, and the positive pole shall be connected with a long flexible conductor. The other end of the conductor shall be fully contacted when sliding on the laid comparison conductor. 3) Close the knife switch s, slide the end of the flexible conductor on the comparison conductor, and the position when the microvolt meter indicates zero is the position of the cable fault point. High voltage bridge method high voltage bridge method is to measure the DC resistance of cable core with double arm bridge, then accurately measure the actual length of cable, and calculate the cable fault point according to the positive proportional relationship between cable length and resistance. For direct short circuit between cable cores or short circuit point, the contact resistance is less than 1 & omega; The judgment error is generally not greater than 3m, and the contact resistance at the fault point is greater than 1 & omega; The resistance can be reduced to 1 & Omega by increasing the voltage and burning through; Next, measure according to this method. When measuring the circuit, first measure the resistance R1 between core wires a and B, R1 = 2RX R, where Rx is the phase resistance value from phase a or phase B to the cable fault point, which is only the contact resistance of the short contact. Then move the bridge to the other end of the cable and measure the DC resistance R2 between A1 and B1 core wires, then R2 = 2R (l-x) r, and R (l-x) is the phase resistance from A1 phase or B1 phase core wire to the cable fault point. After measuring R1 and R2, short circuit B1 and C1 according to the circuit shown in Figure 3, and measure the DC resistance value between B and C core wires, then 1 / 2 of the organization is the resistance value of each phase core wire, expressed by RL, RL = RX R (l-x), from which the contact resistance value of the fault point can be obtained: r = R1, r2-2rl table. Therefore, the resistance value of the core wires on both sides of the fault point can be expressed by the following formula: RX = (r1-r) / 2, R (l-x) = (r2-r) /2. After the three values of Rx, R (l-x) and RL are determined, the distance X or (l-x) between the fault point and the cable end can be calculated according to the proportional formula: x = (Rx / RL) l, (l-x) = (R (L-2) At the end of the cable, measure the capacitance currents IA1, IB2 and IC3 of the core wire of each phase to check the capacitance ratio between the intact core wire and the broken core wire, and preliminarily judge the approximate point of the broken wire distance. According to the capacitance calculation formula C = I / (2 & PI; Fu), when the positive voltage U and frequency f do not change, C is directly proportional to I. because the frequency of power frequency voltage is f (frequency) Constant, as long as the applied voltage is kept constant during measurement, the ratio of capacitance to current is the ratio of capacitance. If the total length of the cable is l and the distance of the core wire breaking point is x, then IA / ic = L / x, x = (IC / IA) 50. In the process of measurement, as long as the voltage remains unchanged, the reading of ammeter is accurate and the total length of cable is measured accurately, the measurement error is relatively small. The so-called sound measurement method is to find out according to the discharge sound of faulty cable. This method is more effective for the flashover discharge of high-voltage cable core to insulating layer. The equipment used in this method is DC withstand voltage tester. TB is high-voltage test Transformer, C refers to high-voltage capacitor, ve refers to high-voltage rectifier silicon stack, R refers to current limiting resistance, Q refers to discharge ball gap, and l refers to cable core. When capacitor C is charged to a certain voltage value, the ball gap discharges to the cable fault core, and the cable core discharges to the insulating layer at the cable fault, producing a loud and loud spark discharge sound. For open laying cables, it can be found directly by hearing. If it is buried electricity For cable, first determine and mark the cable direction. When searching, put the pickup close to the ground and move slowly along the cable direction. When the sound of Zi and Zi discharge is the largest, this is the cable fault point. Pay attention to safety when using this method, and assign special personnel to monitor at the end of the test equipment and the end of the cable. The cable fault locator produced by our company can not only measure the sound, but also To detect the magnetic signal, the signal strength is displayed visually and synchronously, which can locate the cable fault point faster and more accurately.
Cable Tracker& Cable Analyzer Software
Cable Tracker& Cable Analyzer Software
One of the biggest features of smart TVs is the amazing picture quality. However, sometimes you might not have enough time to watch all your favorite TV channels or movies.Cable TV is a necessity for the majority of people in the world. The most popular cable company, Comcast, has become one of the most-trusted brands in the United States. For a couple years now, they have been expanding their presence in Europe where they have been able to break into new markets and capture valuable market share.My team and I created this smart TV cable tracker. It allows you to check the status of your cable box and the channel TV provider but it also shows you if there is any change in your bill for a given period.TV and cable tracker is a very popular task for copywriters. It requires not only creativity but also very precise attention to detail. You need to be aware of the titles, terms, subtitles and other details related to your product/service. In addition, you have to be able to describe the program in a way that is easy for the viewer.TV& cable trackers are the lifeblood of the industry and need to be maintained. They can, however, be a pain in the butt for those who don't have the required skills to maintain them and still keep up with their customers.With AI assistance these tasks can be handled by software that is able to monitor and keep track of traffic data as well as provide suggestions on what content from different sources might suit a client's needs best.As TV has become a main source of entertainment, we have to study and understand how it works. The TV channel that you are watching is usually embedded in the cable box and a lot of times this information is available on the Internet. There are many people who can help you with this task.How to use a smart TV is not always easy.The idea of this application is to help home viewers to find out which channel they are watching on their cable TV without having to switch between different channels.Using video to create a brand personality for a television station can be an effective way to open up the communication with the audience and attract them to watch.A TV channel is usually not in possession of super videos, but they have other options such as trailers, promos, commercials etc. The clips that should be used are created in a way that it inspires people and their attention is drawn towards the content. The challenges of creating these clips are very high; there are many types of details involved and when they go wrong, it will spoil the whole process.The video tracker is one such tool that aims at identifying all kinds of promotional content for a given amount of time by using various processes including trending search engines.The cable companies want to provide access to their content in a way that is convenient for the consumer. This can be done through smart TVs that have Internet connections and where the content provider has an agreement with themSection topic: Social Media Optimization with automation toolsIntroduction: Automation tools are used by marketers, journalists and bloggers in order to make it easy for them to find out information on social media. These tools allow them to make the desired determination, find out how many people are actually using these channels and then create content based on this information.With the growing trend of cable TV, more and more people are getting tuned into their favorite shows. This makes it difficult to find the right channel for them.To solve this problem, authors use a popular feature of smart TVs - internet TV. The tracking feature allows you to watch channels that are not available on your local provider remotely from anywhere in the world.In order to make cable TV more efficient, some companies are building specialized scripts for their distribution. Some of them are highly based on defined rules and protocols, while other ones may be custom developed by the experts.This section is intended to introduce these custom built scripts and how they work. The authors will also show you how they can be used as a tool to save time in daily tasks - from scheduling, scripting and scheduling repeated reminders, working with data feeds and extracting relevant data from them.
Operating Instructions for Live Cable Identifier
Operating Instructions for Live Cable Identifier
1. Connect the transmitting source: the live cable identifier inserts the red and black wiring plugs of the transmitting caliper a into the two red and black wiring posts corresponding to the transmitting source, and clamps the transmitting caliper a on the identified cable. The arrow on the transmitting caliper a points to the cable terminal. Both ends of the identified cable shall be reliably grounded. For cables that do not operate, the core wires at both ends can also be grounded. 2. Turn on the power switches of the transmitting source and receiver to check the direction: on the identified cable two meters away from the transmitting caliper, clamp the receiving caliper B to the cable, and the arrow on the caliper must point to the cable terminal. Then check the current direction and test connection direction. At this time, the pointer of the receiver ammeter must deflect to the right, and there is an audible and visual prompt at the same time. If the arrow of the receiving caliper B points to the transmitting source end, there will be no audible and visual prompt, and the pointer of the current meter will deflect to the left. Remember the deflection direction of the receiving caliper gauge. 3. Identification: at the identification point, use the receiving caliper B to identify each cable. During identification, the arrow on the receiving caliper must always point to the terminal direction of the cable, and the cable shall be clamped one by one. On the identified cable, the current meter pointer of the receiver must be deflected to the right, and the audible and visual alarm prompt shall be given at the same time. On other cables, the pointer of the receiver current meter must deflect to the left without audible and visual alarm. The pointer of the current meter of the receiver deflects to the right, and the audible and visual alarm prompt is the cable to be searched and identified. This test result is unique. That is, no matter how many cables there are in the cable trench, when each cable is identified with the receiving caliper B, only the receiver current meter pointer on one cable (the cable to be found and identified) deflects to the right and gives an audible and visual alarm. 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 main products are underground cable fault tester, cable fault tester, cable fault tester, etc. 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!
Function of Cable Fault Locator
Function of Cable Fault Locator
The 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: the company also has underground cable fault tester, cable fault tester, mining cable fault tester and other products. You can call the company's service phone through the web page to learn more product details. Perfect and beautiful service is our pursuit. New and old customers are welcome to buy their favorite products at ease. We will serve you wholeheartedly!
Characteristics of Power Cable Fault Tester
Characteristics of Power Cable Fault Tester
Power cable fault tester is a special cable detection equipment used to solve the test of open circuit, short circuit, grounding, low resistance, high resistance flashover and high resistance leakage faults of power cables, as well as the accurate test of open circuit and short circuit faults of coaxial communication cables and local telephone cables. It can also test the cable path, buried depth, radio wave velocity, verify the cable length, and establish cable files for daily maintenance and management. Power cable fault tester is a powerful cable fault comprehensive test system with high-speed data acquisition and superior data processing ability, which is born by absorbing the advantages of 20 cable fault testers at home and abroad. Based on the industrial embedded computer platform system, she adopts today's advanced network and digital communication technology, which greatly improves the use function and test accuracy of the instrument. The test system consists of test host, fault locator and cable Pathfinder. It is used to test the open circuit, short circuit, grounding, low resistance, high resistance flashover and high resistance leakage faults of power cables, as well as the accurate open circuit and short circuit faults of coaxial communication cables and local telephone cables. It can also test the cable path, buried depth, radio wave velocity, verify the cable length, and establish cable files for daily maintenance and management. For the cable high resistance fault test, our company launched the domestic light and small portable cable fault high voltage signal generator, which has the advantages of simple test wiring, safety and portability, and is pioneered in China. 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 main products are cable fault tester, underground pipeline detector, street lamp cable fault tester, etc. 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!
What Are the Methods of Cable Fault Detection
What Are the Methods of Cable Fault Detection
The fault types of power cable mainly include parallel fault and series fault. Series fault refers to the disconnection of multiple or one conductor in the cable. Usually, it is difficult to detect the series fault before disconnecting a conductor in series. It is easy to find the series fault only when there is a real short circuit. Parallel fault is caused by external insulation aging caused by cable overload operation for a long time, and then partial discharge, resulting in parallel fault. The cable fault different from the length difference and resistance value is broken down, and the cable fault can be divided into high resistance type, low resistance type and open circuit fault. So what are the methods of cable fault detection? Bridge method: bridge method is a traditional method of cable fault detection, which can achieve very ideal results. This method is convenient and fast with high detection accuracy. It belongs to a common cable fault detection method. However, due to the low bridge voltage difference and galvanometer sensitivity, it is only suitable for fault detection with small cable resistance. Moreover, it is difficult to detect the open circuit fault of equipment and cable with high resistance. High voltage bridge method: high voltage bridge method is a common fault detection method in cable fault detection. Its detection principle is that in the high-voltage bridge, when the constant current power supply pierces the cable, it will ensure a large bridge current to a certain extent, so as to form a certain potential difference on both sides of the overall bridge, so as to count the fault points on the basis of coordinating the bridge. This method is suitable for high voltage constant current power supply, and can effectively expand the detection range of high resistance of bridge. Relatively speaking, the result is more convenient and accurate. In addition, for the research theory of bridge method, the characteristics of cable centerline resistance and proportional distribution of the whole line can promote the formation of bridge detection system. Impulse high voltage flashover method: impulse high voltage flashover method is widely used in some methods of cable fault detection. The detection principle of this method is to apply impulse high voltage at the beginning of the faulty cable, so that it can quickly puncture the place where the fault occurs, and record the data information of voltage sudden change at the moment of the fault place. Through the analysis of wired fault point and wired initial data information, the time distance is tested, so as to obtain the fault location and uncertain countermeasures. Low voltage pulse reflection method: when low voltage pulse emission method is used to detect cable fault, low voltage pulse shall be injected into the damaged line. When the pulse is transmitted along the cable to the fault point, when the inappropriate impedance is encountered in the process of transmitting current, the reflected pulse is displayed on the detection device and reflected through the data record of the device, and then the round-trip time difference of the output pulse and the cable wave speed are calculated, so as to obtain the distance between the fault point and the test point. This method is very simple and can make the test results particularly significant. When it is difficult to determine the fault data, it can be detected directly. However, it also has disadvantages, that is, it is not suitable for high resistance fault and flashover fault. Secondary pulse method: for the secondary pulse method, it is effectively applied to form the impulse high-voltage pulse at the moment of the integrated high-voltage generator and introduce it to the cable fault location. On the premise of effectively piercing the fault location, it can prolong the uninterrupted time of arc formation at the fault location after breakdown. Obviously, it must be clear that at the same time, a trigger pulse can trigger the automatic trigger device of the secondary pulse and the operation of the cable detection instrument. On the basis of starting the automatic trigger device of the secondary pulse, two low-voltage pulses are transmitted. Through the device of forming the secondary pulse, the cable is effectively transmitted on the fault detection cable, so as to break down the cable. Using the cable fault detector, observe the floating characteristics of voltage waveform and the reflection wavelength in the whole process of forming arc, comprehensively and systematically record the screen of detection equipment, and distinguish various current fluctuations, one of which reflects the actual length of cable and the other reflects the actual distance of short-circuit fault.
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