Underground Cable Fault Tester Buying Guide

Underground Cable Fault Tester Buying Guide

2021-11-06
NOYAFA
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The Underground cable fault tester is a main profit-maker in SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED. It is always famous for its high cost-performance ratio and wide application. Made of fine raw materials from long-term cooperation partners, the product is supplied with the competitive price. And it is manufactured based on the advanced technology, making it be of superior durability and stability. To add more value to it, it is also designed to be of attractive appearance.Over the years, we have been committed to delivering exceptional NOYAFA to global customers. We monitor customer experience through new internet technologies - social media platform, tracking and analyzing the data collected from the platform. Thus we have launched a multi-year initiative to improve the customer experience that helps maintain a good cooperative relationship between customers and us.At Best Cable Tester Supplier in China _ Noyafa, we offer solutions of Underground cable fault tester and suchlike products that can be tailored to the needs of our existing and future partners and customers in any given market. Get the questions answered about product specifications, use and care at the product page.
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Buried Cable Fault Tester
Buried Cable Fault Tester
With the continuous strengthening of China's national strength, the development of power system is getting better and better. Cables have been widely used, and have high security because of their own characteristics. However, because most power cables are buried underground, it is inconvenient for people to determine the fault location. If the fault can not be eliminated in time, the resulting loss will be very serious. Underground cable fault tester introduces the underground cable fault tester, which is used to locate underground buried utilities. The basic form is divided into two parts, - one is the transmitter and the other is the receiver. The transmitter part is used to sense the signal to the pipeline or cable, and then the rod or receiver is used to locate the signal generated by the line. Can you find electricity, cable TV, telephone, water or gas pipes and tracer lines? Yes, any underground utility with metal structure and linear and preferably grounded along the path or end point can be located by any so-called cable fault locator. Did you find plastic (or any non-metallic tools)? No, the utility must have metal linearity for the signal of the locator to be transmitted downward. However, if a tracer line is buried next to or included in a non-metallic utility, the metal is metallic and can be located. Sometimes, a metal linear device (such as a plumber's snake or an electronic fish belt) can be inserted into the interior of a non-metallic pipe and positioned by applying a signal to the inserted device. What is the best choice of cable fault locator when there are many utility cables working underground and nearby? Multi frequency mode is preferred. By selecting frequency and power adjustments, this provides a way to isolate utilities from other facilities and reduce interference. Function introduction of underground cable fault tester the underground cable fault tester covers what is necessary to locate and track the path of wires, cables, pipes and conduits, whether buried underground or behind the wall. When you want to dig underground and avoid crossing buried utilities, this section contains a combination of locators and tracers to enable users to identify and mark routes and locations, saving thousands of dollars in maintenance costs. The function of cable fault tester (also known as cable fault tester) is the same as that of most buried utility locators. The transmitter is used to supply power to metal wires (cables or pipes) at a certain frequency by directly conductive connection to metal wires. Connect a single conductor of the transmitter to the pipe. The other - conductor is grounded perpendicular to the line and as far away from the line as possible. This forms a closed circuit that allows the current to flow. The current flowing through the pipe generates a magnetic field, which forms a columnar area around the pipe and represents a signal. A magnetic field is produced by an electric current rather than a voltage. The capacitance increases with the increase of conductor surface area. Therefore, the larger the conductor or pipe, the shorter the signal transmission distance. Buried cable fault detection is quite common in the actual power work, and the cable fault types and causes are also diverse. Therefore, there are enough advanced detection equipment to escort the power. Once a fault occurs, first analyze the fault types and causes, and then determine the fault location according to the fault state, Finally, the fault is handled to ensure the normal operation of the power supply system.
How to Use the Cable Identifier and How to Judge Whether the Cable Is Live
How to Use the Cable Identifier and How to Judge Whether the Cable Is Live
How does the cable identifier judge whether the cable is live? First: why should we judge that the cable is live: as an important instrument of power cable detection instrument, cable identification instrument has been used more and more widely. When there are multiple cables in the cable trench, it is necessary to identify a specific power-off cable, calibrate, move or cut off the cable, and other cables in the cable trench operate live, so the cable identification instrument shall be used for cable identification. Second: easy to use: compared with the cable fault tester, the use of the cable identification instrument is relatively simple. It is easier to use it by reading the instructions. Third: test example: since the cable shielding layer is usually connected to the ground, if other cables are also connected to the public ground in the cable bundle, the black output jack on the generator can be connected to the public ground, The return current is distributed in several cable shielding layers, and the return current is divided into many tributaries, which means that the difference current of the identified cable is large and the useful signal is clear. "Difference" means that the output current and its divided return current are in the same channel. As shown in Figure 4, there are 5 cables in Figure 4. Cable 4 needs to be identified. The "output current" of the cables to be identified is 20A. Assuming that the return current is evenly distributed among the shielding layers of all cables, there should be a return current of 4A in the cable to be measured. The difference in the cable to be identified is: 20A (output) - 4a (return) = 16A (difference). How to use the cable identification instrument I. working method of the cable identification instrument: the transmitter (host) is powered by 220V AC power supply, which is used for the power-off The cable to be identified, plus a fixed period, unipolar DC pulse signal. The output line of the transmitter is connected to the cable core and the grounding point or ground nail. The armor of the cable is disconnected from the earth, and the core is connected to the grounding point or ground nail at the far end. The loop can conduct pulse current, which can be read out by the meter on the receiver of the identifier. The current is determined by the loop resistance, and the loop resistance should be as small as possible. The wiring diagram of the identifier is shown in Figure 2. Note: during field use, if the grounding resistance is too small, the output current of the transmitter will also be large when the output adjustment knob is turned back to zero, and the protection circuit in the transmitter will act (shown as a small fast swing of the meter). At this time, the randomly configured 1 ohm 20W high-power resistor can be connected in series in the transmitter circuit. After the transmitter and receiver start working normally, the voltage induced in the sensor coil is displayed in the receiver header. The pointer swing direction of the header can display the current direction, that is, only the cable with current flowing out, the pointer deflects and swings greatly. This is the cable to be found. For all other cables, only the return current flows, the pointer deflects in the opposite direction and the swing is very small. The output adjustment knob on the receiver can adjust the signal strength. 2、 Wiring mode: 1. Before the test, cut off the tested cable, and the surrounding environment shall be in a safe state. 2. The generator is connected with the tested cable, and the red clip is connected with one or several cores of the identified cable. Connect the black clip to the ground nail. 3. Connect the core wire at the far end of the cable to the ground nail. 4. Disconnect the armor at both ends of the cable from the ground wire. 5. Plug the power cord into the power outlet. 3、 Identify the cable through the loop test. 1. In order to ensure the normal use of the instrument, pay attention to setting the test loop. 2. Connect the red output jack to the core of the cable to be identified, connect the black output jack to the ground, and connect the cable core to the ground at the far end. As shown in Figure 3, 3. The output current flows to the far end in the direction of the arrow in the cable, and all cores of the identified cable can be connected together through the earth return generator to obtain a clearer signal.
Best Wire Tracker Software for E-Commerce Businesses
Best Wire Tracker Software for E-Commerce Businesses
The introduction of wire trackerContexts: When it comes to wire tracker, there are many different ways of doing it.Tips for wire trackerThis section discusses the best way to find the right freelancer.How to use wire tracker?The introduction on the section topic is crucial for any content writing. Without it, visitors will not be able to understand the content.Wire trackers can help you create a well-written and engaging web page. Their main purpose is to collect all the data from web pages that you have targeted so that you can see which keywords they used and their conversion rates.The specifications of wire trackerThe wire tracker is used to sync the content of a website in a process called content migrations.While Google and Facebook are using these tools, most of the other online media companies are yet to use them. There is no standard for this tool and it will depend on the company's policies.The use of this tool will take up significant amount of time and resources but can help save money in terms of server expenses as well as bandwidth costs. The key benefit over standard CMS is that it can handle more than one page at a time, so it can work on different pages at once without additional plugins or scripts. It also allows users to move pages from one domain to another without disrupting traffic flow between domains.The product instructions of wire trackerProduct instructions are a very important part of a product. They provide information on how the product is supposed to be used and what information should be mentioned in certain parts of the instruction manual.The main purpose of this article is to explain how manufacturers can address this issue in their advertisements. The illustrations are taken from a wire tracker which was invented by Marston& Son in 1884.The application of wire trackerContent writing is considered a type of cross-functional activity that requires the ability to handle large amounts of content at once. The use of a wire tracker enables companies to track and analyze the time spent on their content projects.The most popular kinds of wire trackers are systems based on social media, web search, and electronic calendars. These tools have been widely used in the last 10 years or so, but there have been some recent developments which may make them more attractive to businesses. One such development was Google’s release of Google Calendars in 2015.
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!
Introduction to the Use of Cable Fault Finder
Introduction to the Use of Cable Fault Finder
Due to the cable fault caused by cable laying, the location of cable fault varies with the cable laying mode, and the location increases gradually. Among them, the laying side in bridges, tunnels and trenches is relatively simple, and the direct burial method is difficult to locate. When the nature of the fault is simple, a special cable fault finder is used, and it takes 4-5 days or even longer to locate the equipment within dozens of minutes. When using echo method to locate cable fault, sometimes by transferring fault phase and wiring mode, complex fault will often be transformed into simple fault to quickly determine fault location. It is of great significance for the power supply user department to win time for the emergency repair of on-site lines. Low voltage power cables are generally multi-core cables. When faults occur in continuous use after laying, they generally show two core and multi-core phase to phase or phase to ground short circuit faults. Sometimes when it is detected that the fault waveform collected by one core is not ideal, it can be considered to convert the wiring to other fault cores for fault waveform detection, which often has unexpected effects, The collected and detected waveforms will become more typical and regular, so the specific location of cable fault point can be determined quickly. During the long-term on-site measurement of cable customers, it is found that the fault of small section copper core directly buried power cable (35mm2 and below) and aluminum core cable may be accompanied by short circuit and wire breakage at the same time. During on-site detection, converting short-circuit fault into broken line fault measurement according to the different fault nature of each fault core will often double everything with half the effort. For the medium voltage direct buried power cable with extruded armor as the inner lining, the fault is mostly caused by external mechanical damage. When the insulation core fails, the inner lining may have been damaged. When the cable insulation fault is special and it is difficult to collect the waveform with a professional cable fault tester, the acoustic method can be considered, When the high voltage pulse is directly applied between the steel strip and copper shielding layer of the cable, it will often be fixed quickly. Using the cable fault finder in the field measurement process, we also found that when using the acoustic method to locate the fault of low-voltage cable. When the high-voltage line and ground wire are connected between the bad phase and the metal shield or armor, due to the low resistance metal connection state of the insulation resistance of the two, the sound is very small, so the probe can not be used to listen to the fixed point, and the effect is not ideal. Through the actual listening side on the site for many times, it is found that the distance between the discharge ball gaps is appropriately increased. At the same time, if the high voltage and grounding wire are connected between the two faulty phases, the discharge sound will become louder and the fault point will be determined quickly.
The Secret of Using Pipeline Detector
The Secret of Using Pipeline Detector
The pipeline detector basically has the following three detection methods: direct connection method, clamp method and induction method. However, the use frequency of pipeline detector can be basically divided into two categories: high frequency and low frequency. Low frequency attenuation is slow, transmission distance is long, radiation is small, it is not easy to connect in series, but penetration is poor; High frequency band high frequency band, strong penetration, large radiation, but fast attenuation and close distance. Therefore, the appropriate working frequency should be selected according to different methods. 1、 Direct connection method direct connection method is to load the signal sent by the transmitter directly onto the pipeline to be detected by the pipeline detector. Direct connection method is the best signal processing method, which is usually preferred when conditions permit. Direct connection mode is adopted, the signal is stable and not easy to be disturbed by other pipelines. In practice, cast iron pipelines and steel pipes are recommended to be tested by direct connection method, in which the use frequency can be selected according to the material of the pipeline, and the steel pipe can use low frequency, because the steel pipe has good conductivity, and the use of low frequency can be transmitted further. However, it should be noted that the signal of direct connection mode will be transmitted in two directions along the pipeline and distributed unevenly. The grounding point should be a certain distance (& gt; 5m) from the pipeline. The ground wire needle should be inserted in the soil and watered if necessary to reduce the ground wire resistance, which is conducive to signal transmission. 2、 Clamp method can be used when the signal cannot be directly loaded on the pipeline. The method is to connect the signal of the transmitter with the target pipeline through a clamp. The invention is applicable to communication, power and other pipelines. Generally, when this method is adopted, the use frequency can be selected according to the external interference. In the case of small external interference and extremely poor conductivity of the pipeline, high frequency can be used as induction. Generally speaking, we can detect with a frequency of about 33 kHz. Pay attention when using the pliers. The jaws of the pliers should be closed. In addition, although it is convenient to apply signals, the transmission distance and signal stability of this method are worse than those of the direct connection method. 3、 As the name suggests, induction method is to directly sense the signal of the transmitter to the target pipeline through non-contact mode. Generally speaking, this method can be used only when direct connection and clamp cannot be used. However, this method is greatly affected by the surrounding environment, and will produce a lot of interference when the vehicle passes through or the pipeline is close to the metal. Therefore, when selecting the frequency again, we must pay attention to avoid using high frequency for detection as far as possible, because the high frequency excitation range is large, which will cause serious interference between pipeline signals. In use, it should be noted that the distance between the transmitting end and the receiving end should be kept 10m as far as possible to avoid the frequency of the transmitting end interfering with the signal. In terms of methods, such a rule is generally followed. Direct connection can be used without pliers, and induction can be used without pliers. Frequency selection is also to select low-frequency detection as much as possible according to specific conditions. This ensures that more accurate conclusions can be drawn when using the pipeline detector.
5 Tips on How to Use and Maintain Electric Screwdriver
5 Tips on How to Use and Maintain Electric Screwdriver
An Electric screwdriver is what we generally call power screwdriver. It is widely used in automobile assembly, household appliances, consumer electronics, LED and so on. Power screwdriver works on the basis of ordinary screwdriver driven by power. It can improve working efficiency. Today, I would like to share with you seven tips on using and maintaining electric screwdrivers.Five tips on Maintenance Power ScrewdriverRead the instructions and operate the power screwdriver according to the specificationsThe use of the process should pay attention to the motor size of power screwdriver. Dont operate blindly in case of excess of workload and damage to the power screwdriver. For example, like this screwdriver with torque control its torque range is 3070 kf.cm. It can only tighten objects within 3070 kg but not 80 kg. Because its torque value does not meet the requirements, which will damage the power screwdriver and reduce its life. [caption4. During the using can not be directly adjusted from the lowest torque to the highest torque or from the highest torque to the lowest torque, this is easy to cause clutch and torque thimble off. Thus reducing the service life of electric screwdrivers. Before using the power screwdriver you should tighten the fixing ring (or torque sheath) of. Both ends of the power cable should be symmetrical with the socket hole of the power supply and the electric driver and tighten the nut of the power cable.6, power screwdriver should be kept well, do not allow the corrosive liquid to enter5. Please keep the repair card of the power screwdriverBrushless vs. power screwdriverThe carbon brush life of the electric screwdriver is about 1000 hours. Of course using the original carbon brush, in addition to the power screwdriver to maintain. I suggest buying a brushless electric screwdriver, which is maintenance-free. Brushless power screwdriver will not produce an electric spark, strong anti-interference abilityAlthough the power screwdriver and common screwdrivers are the same, the operation method is simple, but the use of skill is not in place, can cause certain damage to the power screwdriver, so should ensure correct use method and maintenance skill, increase its service life. Brushless power screwdriver will not produce an electric spark, strong anti-interference ability. Brushless motor without carbon brush can reduce noise and wear.
In Case of These Six Cable Faults, It's Right to Choose It for Detection
In Case of These Six Cable Faults, It's Right to Choose It for Detection
With the characteristics of faster inspection speed and high precision of cable fault detector (also known as cable fault detector, cable fault locator and cable fault tester), it has won the favor of many customers. Many powerful enterprises will purchase a set of cable fault detector equipment to ensure the smooth operation of cables in the industrial zone. For equipment with these 6 kinds of cable faults, please choose this cost-effective cable fault tester. 1. Low resistance fault, cable insulation material is damaged and grounding fault occurs. 2. In case of open circuit fault, the continuity of the metal part of the cable is damaged, resulting in wire breakage, and the insulating material at the fault point is also damaged to varying degrees. 3. High resistance fault, cable insulation material is damaged and grounding fault occurs. 4. Flashover fault: the insulating material of the cable is damaged, resulting in flashover fault. 5. Breakdown fault: in actual work, the cable insulation damage event triggered by preventive test is commonly referred to as cable breakdown. 6. Operation fault refers to the cable fault determined by eliminating the possibility of faults of other power elements when voltage fluctuation occurs in the high-voltage secondary circuit of cable feeders, motor and transformer during the operation of plant power system or grounding signal is found (grounding tripping occurs in power elements with grounding protection).
What Properties Are Needed in Laser Distance Meter Fluke Raw Materials?
What Properties Are Needed in Laser Distance Meter Fluke Raw Materials?
If this question is asked, you might consider cost, security and functionality of laser distance meter fluke. A producer is anticipated to create certain the origin of raw material, decrease the price for raw material and embrace innovative technologies, in order to enhance the performance-cost ratio. The materials would be tested by the majority of the makers. They might encourage parties to check the materials and issue test reports. Strong partnerships with raw material suppliers are of great relevance to the laser distance meter fluke makers. This usually means that their materials will be guaranteed by quality, quantity and cost.We are a company specializing in the manufacture of a wide variety of laser distance meter fluke in the global market. With a wide variety and a complete range of specifications, SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED's laser distance meter fluke is of good quality and high reputation. You give trust our laser distance meter fluke and we will give good quality in return.Our goal is to help our clients achieve their goals. Inquiry!· Related Questions:1. What are raw materials for laser distance meter fluke production?When this question is asked, you will think about cost, security and functionality of laser distance meter fluke. A manufacturer is expected to ascertain the source of raw material, reduce the price for raw material and use innovative technologies, so as to enhance the performance-cost ratio. Today the majority of the manufacturers would examine their raw materials before processing. They might even encourage third parties to check the materials and issue test reports. Strong partnerships with raw material suppliers are of great importance to the laser distance meter fluke manufacturers. Because this means that their raw materials would be guaranteed by cost, quality and quantity.
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