NOYAFA's Remote Cable Tester

NOYAFA's Remote Cable Tester

2021-10-25
NOYAFA
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SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED develops and produces remote cable tester for various application upon request. Its design starts with considering the needs of the user, but it is added with fashion, style, and personality thereafter, which makes the product aesthetic, fashionable, and practical. As product design, manufacturing processes, materials, and technology continue to improve, the product will be improved accordingly, showing a wider application in the future.With years of development, NOYAFA has successfully won customer's trust and support. Our NOYAFA has many loyal customers who keep buying the products under the brand. According to our sales record, the branded products have achieved remarkable sales growth over these years and the repurchase rate is significantly high as well. The market need is ever-changing, we will constantly improve the product to better meet the globally need and earn larger market influence in the future.As a company focused on both products and services, we always hope to maximize the product functions and optimize the services. Regarding the services specifically, our promise is to offer customization, MOQ, shipping, and suchlike services that would meet your requirements. This is also available for remote cable tester.
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Take Measures to Prevent Cable Failure
Take Measures to Prevent Cable Failure
According to the cause analysis of insulation, accessories and outer sheath faults, it can be seen that the cable line project is a systematic project. Only by managing the whole process from the aspects of design, construction, operation and maintenance can its safe operation be guaranteed to the greatest extent. (1) From the beginning of the design, the grounding system used by the cable shall be fully understood, and the cable conforming to its voltage level shall be selected to avoid the cable working under long-term overvoltage. The selection of outer sheath shall meet the requirements of service environment and service life. At the same time, the selection of cable sheath protector shall meet the principle that the protector can reliably pass through the grounding current without damage during relative grounding. (2) The selection of cable route shall avoid the influence of external environment such as overheating, corrosion and external force damage on the cable. At the same time, it shall also avoid the influence of internal factors causing overheating due to too concentrated cable laying, resulting in the failure of timely diffusion of heat. In addition, the cable path of double circuit power supply is not recommended to be laid in the pipeline of the same path to prevent simultaneous damage and large-area power failure. (3) Strengthen the selection of cables and cable accessories, manufacturer supervision, arrival acceptance and other work to ensure the quality level of cables and cable accessories. During the on-site inspection, the manufacturer, the construction party, the supervisor and the project competent department shall be present, check one by one according to the packing list, timely record the problems found and put forward rectification suggestions, which shall be signed and approved by many parties. After the inspection, the parts susceptible to moisture shall be sealed in time to prevent moisture from affecting normal use. (4) Strengthen personnel training, conduct necessary business qualification and technical evaluation for cable head fabrication personnel, and work with certificates. In case of two consecutive failures due to manufacturing reasons within the warranty period, the cable head manufacturing qualification shall be cancelled, and it can be re employed only after passing the re training and assessment. (5) Strengthen the acceptance of concealed works and intermediate links in all links of cable engineering, strictly control the quality acceptance, thoroughly rectify the defects and hidden dangers found in the acceptance of civil engineering, electrical and other projects, make various records, and leave photos, films and other materials if necessary. (6) Advanced on-line monitoring technologies such as outer sheath circulation on-line monitoring technology, on-line optical fiber temperature measurement technology and on-line partial discharge detection technology are used to strengthen the real-time on-line operation monitoring of cables, find hidden defects in advance and avoid power failure.
How to Accurately Judge and Find Cable Fault
How to Accurately Judge and Find Cable Fault
Cable is an important part of signal equipment, but in the process of use, it is difficult for ordinary users to find the fault point, and they do not know what the reason is. Therefore, it is particularly important to quickly find the cable fault and judge the fault point. Wd-a10 cable fault tester is a set of comprehensive cable fault detector, which can test cable short circuit, cable disconnection, poor contact and other faults. By summarizing the previous experience, the factors affecting the test accuracy of cable fault tester are analyzed as follows. Since the accuracy of adjusting wave velocity is closely related to the accuracy of test, adjusting wave velocity has become the key to solve the problem. At least two conditions are required to accurately adjust the wave velocity: â‘ the length of the measured cable; â‘¡ There is a good core wire of the tested cable, which is not grounded. Adjust the measurement range without grounding. Connect a good core wire of the tested cable with a known length to the output port of the power cable fault tester and connect it with the red clip wire, the black clip wire and the ground, or another good core wire of the cable. Change the measurement range to match the actual length of the cable. If the actual length of the cable is less than 161.4m, the measurement range shall be adjusted to 161.4m; If the actual length of the cable is greater than 161.4 m and less than 322.8 m, adjust the measurement range to 322.8 m, and so on. The preset wave velocity is 200 220m / μ Set a wave velocity randomly between S and measure it as the wave velocity of the initial test. It is assumed that the wave velocity measured initially is 200 220 M / & mu; S is because the signal cables usually used are in this range. This step is very important. If this step is not set, the initial measured cable length is very different from the actual cable length, and it is difficult to adjust in the next step. After adjusting the wave velocity and measuring the distance of the fault point, compare it with the actual cable length. If the distance between the fault point displayed on the top of the screen is the same as the actual cable length, the original set wave speed, that is, the wave speed displayed on the screen is the actual wave speed of the cable. When testing any point fault of the cable, this wave speed can be used as the benchmark for testing; If the distance of the fault point displayed on the top of the screen is different from the actual cable length, you can simply adjust the wave speed with the cursor still, which can be large or small, so that the fault distance above the screen is the same as the actual length of the cable, then the adjusted wave speed is the actual wave speed of the cable. When testing the cable fault, you can use this wave speed as the benchmark.
What Standards Are Followed During Non Contact Voltage Tester Pen Production?
What Standards Are Followed During Non Contact Voltage Tester Pen Production?
As is widely known to us that China is a manufacturing power. As our country develops, there arises a large number of manufacturing enterprises of non contact voltage tester pen, and some of them are on the top-ranked list by virtue of their modern technologies especially R&D capability while others are lack of their own technology, and are still struggling in this competitive society. For those companies who stand out in the industry, what they have in common is that they invest heavily in technological innovation and keep enhancing their R&D strength. You may search those suppliers on Alibaba.com, Made in China.com, or other websites frequently used by foreign suppliers.We’re a leader in the non contact voltage tester pen industry, serving hundreds of the world’s most recognized brands. SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED pays meticulous attention to material of non contact voltage tester pen and produce good quality products. Superior non contact voltage tester pen and remarkable non contact voltage tester pen creates NOYAFA.NOYAFA non contact voltage tester pen are available at unbeatable price. Get price!· Related Questions:1. What companies are developing non contact voltage tester pen independently in China?As the global demand for non contact voltage tester pen continues to increase, you will find more and more Chinese manufacturers emerging. In order to remain competitive in this evolving society, many suppliers are beginning to focus more on the ability to create their own independent production projects. NOYAFA is one of them. The ability to develop independently is very important and demanding, which may lead to excellence in commercial enterprises. As a professional supplier, it has always been committed to creating research and development skills to better enhance its competitiveness and create more innovative and modern products.
Steps for Cable Fault Detection
Steps for Cable Fault Detection
The detection of cable fault generally goes through three steps: diagnosis, ranging and fixed point. 1. Cable fault nature diagnosis the diagnosis of cable fault nature, that is, to determine the type and severity of fault, so that testers can suit the remedy to the case and select appropriate cable fault location and fixed-point methods. 2. Cable fault location cable fault location, also known as rough measurement, uses instruments to determine the fault distance at one end of the cable. The common fault location methods at the test site include classical bridge method (high voltage bridge and low voltage bridge) and modern traveling wave method (pulse method: low voltage pulse method and high voltage pulse method). 3. Cable fault location cable fault location, also known as precise measurement, is to find out the general orientation of the fault point according to the fault location results and the path direction of the cable, and determine the accurate location of the fault point within a very small range by using the discharge acoustic measurement method or other methods. Generally speaking, successful cable fault detection must go through the above three steps, otherwise it will not be achieved if you want to speed up. For example, it is very difficult to detect the discharge sound at the fault point along a long cable path (possibly several kilometers long) without fault location. If the cable fault distance is known and a general orientation is determined, it is much easier to move the fixed-point instrument back and forth within a small range (about 10m) to detect the discharge sound at the cable fault point.
Cable Tester, Cable Tester Software
Cable Tester, Cable Tester Software
The introduction of cable testerTo reduce the costs of content development, some companies require their writers to do the same thing they do for clients. They test the quality of the content produced by both internal and external writers.Tips for cable testerThe cable tester is responsible for testing all the cables of a home or network. These testers are usually used to test whether a cable is working correctly or not. In most cases, the cable tester uses basic tools like voltmeter and ohmmeter to check the electrical connection but sometimes they also need other tools like earphones and headphones.How to use cable tester?Cable splitter is a device used to split an HDMI cable into two cables. It can be used to split HDMI cables into three different cables, four cables, five and so on.The specifications of cable testerAn expert in his field is a better source of information than a layman. A good cable tester knows what he is talking about and can therefore point out issues with cables.The product instructions of cable testerIn order to test the product, a tester needs to watch a video. The person who tests the product needs to know what the visuals look like. They need to know what is visible and what is not in order to understand if this is a good or a bad product for them.The application of cable testerA cable tester is an application that uses some artificial intelligence techniques to test the quality of the cables. These artificial intelligence techniques are designed to ensure that cables don't break or give out during a long run, and catch any faulty cables.The application of cable tester in a production environment is not easy, as it involves a lot of manual work as well as advanced testing procedures. It also requires communication between multiple people to make sure that all the tests are done correctly. There are also a lot of problems with this scenario which makes it more problematic for companies to consider it for their production environments.
List of Fault Finding and Detection Methods for Low Voltage Cables
List of Fault Finding and Detection Methods for Low Voltage Cables
Generally, the radiation path of high-voltage cable is easy to determine, but the high-voltage cable needs to be filled with sand bricks to be deeply buried. Its fault point is difficult to find. The radiation length of low-voltage cable is short, the radiation is random and the path is unclear. The following small series will introduce the fault finding and detection methods of low-voltage cables. You can simply understand. In order to solve the problem of low-voltage cable fault, researchers have developed and produced a cable fault tester based on the principle of impulse flash method. In order to find and detect the fault of low-voltage cable, first measure the distance with rangefinder. In fact, first judge whether the cable fault is high resistance, low resistance or grounding, and adopt different test methods according to this condition. If it is a ground fault, the low-voltage pulse method of the rangefinder is directly used to measure the distance; If it is a high resistance fault, the high-voltage impulse discharge method should be used to measure the distance. When using the high-voltage impulse discharge method to measure the distance, there are many auxiliary equipment: such as high-voltage pulse capacitor, discharge ball, current limiting resistance, inductive coil and signal sampler. The operation is troublesome, unsafe and dangerous. What is more cumbersome is to analyze the sampling waveform, The knowledge requirements of testers are relatively high. The second step is to find the path (this step can be omitted if the path is clear). When finding the path, add a signal (path signal generator) to the cable, and then the receiver receives the signal. Walk along the path with the signal once to determine the path of the cable. However, the range of this path is about 1-2 meters, which is not particularly accurate. The third step is to accurately locate according to the measured distance. It is based on the sound generated by ignition and discharge. When a loud sound is heard from the headset of the pointing instrument, that is, the location of the fault point is found. Due to listening to the sound, it takes a lot of time to find it due to the influence of environmental noise. Sometimes it can't be found until the evening. When it comes to cross-linked cables, it takes more time. Generally, the sound of internal discharge of cross-linked cables is very small. After almost no hearing, it is only measured. Therefore, this method can solve most of the power cable faults with oil impregnated paper as insulating material. For the cable faults with crosslinked material and polyethylene material as insulating material in recent years, the test effect is not ideal, because the sound generated by ignition and discharge is often very small (the cable skin is not damaged, but the internal discharge of the cable), In this case, only other methods can be used to solve it. We know that the insulation requirements of low-voltage cables are low, and the current is large during operation, which has obvious characteristics after failure. It is specifically classified as follows: class I fault: the whole cable is burned out or a phase is burned out. This fault causes the current relay on the distribution cabinet to act, and the cable is seriously damaged at the fault. Class II fault: each phase of the cable is short circuited. Similarly, this kind of fault causes the current relay and voltage relay on the distribution cabinet to act, and the cable is seriously damaged at the fault point (possibly caused by external force). Class III fault: the cable has only one phase open circuit, the current relay acts, and the damage at the fault point is light but obvious. It may be that the phase current is too large or caused by the cable quality. Four types of faults: internal short circuit of cable, no trace can be seen on the surface. Such faults are generally caused by cable quality, which is relatively rare.
Working Principle of Live Cable Identification Instrument
Working Principle of Live Cable Identification Instrument
As the running live cable is not allowed to damage any grounding wire and other connecting wires, nor is it allowed to directly add the output signal of the live cable identifier transmitter to the cable phase line with high voltage. Two difficult problems need to be solved for live cable identification. One is how to couple the cable identification signal to the cable; Second, the coupled signal is generally small, and the operating cable may have 50Hz power frequency electromagnetic interference composed of 50Hz unbalanced current, induced 50Hz interference current, cable distributed capacitance current, etc. the high-sensitivity receiving caliper has the problem of how to resist 50Hz power frequency interference. The charged cable identification instrument developed by US adopts single chip microcomputer coding and decoding technology and PSK technology widely used in the field of communication. The phase coded signal with an average value of 0 is transmitted on the transmitting caliper, and the single chip microcomputer in the receiving caliper performs phase identification after filtering the received signal by hardware and software. When the receiving caliper cards the cable according to the current direction, the identified cable ammeter deviates to the right, accompanied by audible and visual indication. The current direction of other cables is opposite to that of the identified cable, and the ammeter pointer deviates to the left. No audible and visual indication. This reflects the uniqueness of the identified target cable. It is easy to distinguish the identified cable from multiple cables. In addition, since the signal current strength on the identified cable is the same throughout the line, the electromagnetic signal strength received by the receiving caliper along the cable is the same. In principle, the identified cable is not limited by the length of the identified 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 main products are high voltage cable fault tester, cable fault tester, underground 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!
Introduction to Underground Pipeline Detector
Introduction to Underground Pipeline Detector
Classification of underground pipeline detectors 1. One category is to detect metal pipelines, electric / optical cables and some non-metallic pipelines with metal marker lines by using the principle of electromagnetic induction. This category is referred to as pipeline detectors for short. Advantages: fast detection speed, simple and intuitive, convenient operation and high sensitivity. Disadvantages: (underground pipeline detector) when detecting non-metallic pipelines, non-metallic probes must be used. This method is laborious and needs to invade the interior of the pipeline. 2. The other is to use electromagnetic wave to detect underground pipelines of all materials, which can also be used to find underground buried objects, commonly known as radar, also known as pipeline radar. Advantages: (underground pipeline detector) can detect pipelines of all materials. Disadvantages: high requirements for environment, poor sounding ability (it is difficult to check pipelines with deep buried depth), and high requirements for operator quality and experience. Any instrument is not superior and needs to be used together in order to give full play to their excellence. Traditionally, pipeline detectors only refer to pipeline detectors using the principle of electromagnetic induction, and also use * many instruments. Dear customers: Hello, our company is a high-quality development group with strong technical force to provide users with high-quality products Complete solutions and superior technical service companies. 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!
Characteristics and Principle of Cable Fault Locator
Characteristics and Principle of Cable Fault Locator
Cable fault locator is a comprehensive cable fault detection instrument, which can test the faults such as high resistance flashover fault, high and low resistance grounding, short circuit, cable disconnection and poor contact. The cable fault locator is equipped with an acoustic pointing instrument, which can be used to accurately determine the * * position of the fault point. It is especially suitable for testing power cables and communication cables of various models and different levels of voltage. Adopt a variety of detection methods and apply contemporary * advanced electronic technology achievements. Using computer technology and microelectronics technology, it has the characteristics of high intelligence, complete functions, wide range of use, accurate test, convenient use and so on. The host of the cable fault tester is used to measure the nature and total length of the cable fault and the approximate position between the cable fault point and the test end. The cable fault locator determines the * * position of the cable fault point based on the approximate position of the cable fault point determined by the host of the cable fault tester. For buried cables with unknown direction, a pathfinder shall be used to determine the underground direction of the cable. The basic method of power cable fault test is to apply high-voltage pulse to the fault power cable to produce breakdown at the cable fault point. When the cable fault breakdown point discharges, it generates electromagnetic wave and sound at the same time. Dear customers: the company also has cable fault detector, buried cable fault detector and underground pipeline detector products. You can call the company's service phone through the web page to learn more product details. Perfect service is our pursuit. New and old customers are welcome to buy their favorite products at ease. We will serve you wholeheartedly!
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During 15 years development, Noyafa has become the most famous brand in cable testing industry in China. With excellent production capability, reliable quality, good after-sales service, we get good reputation from customers all over the world.
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