Guide to Shop Electric Line Locator in NOYAFA

Guide to Shop Electric Line Locator in NOYAFA

2021-10-24
NOYAFA
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Quality is not something that we merely talk about, or 'add on' later while delivering electric line locator and suchlike products. It has to be part of the process of manufacturing and doing business, from concept to finished product. That’s the total quality management way – and that’s the way of SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED!Through the endless efforts of our R&D staff, we have successfully made our achievements in spreading NOYAFA brand reputation globally. To meet the increasing demand of the market, we continually improve and update the products and vigorously develop new models. Thanks to the word-of-mouth from our regular and new customers, our brand awareness has been greatly enhanced.We ensure timely response to customers' consultation through Best Cable Tester Supplier in China _ Noyafa. electric line locator is delivered with thorough services, including MOP, customization, packaging, and shipment. In such a manner, customer experience is greatly maximized.
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Cable Grounding Troubleshooting and Precautions
Cable Grounding Troubleshooting and Precautions
There are three main reasons for cable grounding fault. First, cable manufacturing defects are unqualified products; Second, poor operating environment, natural aging and external damage; Third, the installation is not standardized and the wiring is rough. There is only one root cause of grounding fault --- the insulating material of the cable. China's large-scale ground power stations are generally located in the West. These places are generally desert, saline alkali land, large temperature difference in the daytime, serious rat damage and very humid environment. For cable buried laying, the filling and excavation requirements of cable trench are relatively high; The operating environment of the distributed power station cable is no better than that of the above ground. The cable will bear a very high temperature, which is measured and controlled by technicians. The roof temperature can even reach the high temperature of 100-110 ℃. The fire and flame retardant requirements of the cable and the high temperature have a great impact on the insulation breakdown voltage of the cable. Therefore, the following points should be considered in the type selection design: 1. The insulation performance of the cable 2. The moisture-proof, cold proof and weather resistance of the cable 3. The heat-resistant and flame-retardant performance of the cable 4. The laying mode of the cable 5. The conductor material of the cable (copper core, aluminum alloy core and aluminum core) 6. The Section specification of the cable
Pulse Flashover Method for Fault Detection of High Voltage Cables
Pulse Flashover Method for Fault Detection of High Voltage Cables
Cable has a very important application scenario in our daily life. It can be said that we can't live without cable. In order to ensure the normal use of the cable, it is necessary to regularly detect and maintain the cable. In case of cable failure, the fault point shall be found out in time for maintenance. There are many cable fault maintenance methods. Today, I mainly introduce one of the high-voltage cable fault detection methods, pulse flashover method. For high resistance fault, due to the large resistance at the fault point, the reflection coefficient at this point is very small or almost equal to zero. When measured by low-voltage pulse method, the reflected pulse amplitude at the fault point is very small or there is no reflection, so the instrument can not distinguish it. There are two common high voltage flashover measurement methods, namely DC high voltage flashover measurement method (direct flashover method for short) and impulse high voltage flashover method (impulse flashover method for short). 1、 DC high voltage flashover method (referred to as direct flashover method) when the fault resistance is very high and a stable resistance channel has not been formed, the gradually increased DC voltage can be applied to the tested cable. After reaching a certain voltage value, the fault point is preferably broken down to form flashover. The flashover arc is used to form a short-circuit reflection on the added voltage, and the reflected echo is formed by a high resistance source at the input end to form an open circuit reflection. In this way, the voltage will be reflected many times between the input and the fault point until the energy is exhausted. 2、 Impulse high voltage flashover method (impulse flashover method for short) when the fault resistance is reduced and a stable resistance channel is formed, the DC high voltage cannot be added due to the limitation of equipment capacity. At this time, it is necessary to use impulse voltage test. The DC high voltage charges the cable through the ball gap until breakdown, and still generates short-circuit reflection with the flashover arc formed by it. The measuring inductance L shall be added at the cable input end to read the echo. The radio wave is reflected by short circuit at the fault point and l at the input end, and multiple reflections will be formed during this period. Due to the self induction phenomenon of inductance L, it begins to show open circuit reflection due to the current blocking effect of L, and shows short-circuit reflection after a certain time with the increase of current. The whole circuit consists of capacitor C and inductance L, which constitutes a large process of L-C discharge. Therefore, the wave process at the line input is a nearly attenuated cosine curve superimposed with fast pulse multiple reflection wave. 3、 High voltage cable fault detector is generally used. High voltage cable fault is high resistance fault, and high voltage flashover method is used to measure the distance of fault point. This method uses st-330b cable fault locator as experimental equipment. 1. Wiring mode: firstly, complete the wiring of high-voltage flashover as required; Then, connect the sampler with the ranging host with a double clamp test line, and then place the sampler next to the grounding wire of the high-voltage capacitor. 2. Equipment operation (1) start up, select the sampling method as flashover, the pulse width is the default, the cable type is the physical type, and the reading accuracy is the default. (2) Use the high-voltage equipment to discharge the cable, and then click the orange sampling button on the right to start sampling until the waveform is collected. Press the sampling key again to stop sampling. (3) Study the waveform, move the vernier ruler to the starting point and ending point of a waveform, read the waveform, and the distance of the fault point will be automatically measured in the upper left corner.
Specifications for Cable Fault Tester
Specifications for Cable Fault Tester
1. Long test distance: 32km2. Detection blind area: 1m3. Reading resolution: 1m4. Power consumption: 5va5. Service conditions of cable fault detector: ambient temperature 0 ℃ 40 ℃ (limit temperature - 10 ℃ 50 ℃), relative humidity 40 ℃ (20 90)% RH atmospheric pressure (86 106) kpa6. Volume: 225 × one hundred and sixty-five × 125mm38. Weight: 2kg1 traditional cable fault detection method 1.1 measuring resistance bridge method this method has hardly changed for decades. For short circuit fault and low resistance fault, this method is very convenient. The bridge method is based on the principle that when the bridge is balanced, the product of the corresponding bridge arm resistance is equal, and the length of the cable is directly proportional to the resistance. 1.2 low voltage pulse reflection method low voltage pulse method, also known as time domain reflection method (TDR), means that the pulse reflector independently measures the low resistance and open circuit faults of the cable without passing through the high voltage impactor. 1.3 pulse voltage sampling method pulse voltage sampling method, also known as impulse high voltage flashover method, is a test method for measuring high resistance leakage and flashover faults. Firstly, the cable fault is broken down under the DC or pulse high voltage signal, and then the distance is measured by recording the time required for the discharge pulse to go back and forth between the measuring point and the fault point. Pulse voltage method mainly includes DC high voltage flashover (direct flashover method) and impulse high voltage flashover (impulse flashover method). 1.4 traditional method of cable fault location ①acoustic measurement method this method uses the breakdown and discharge sound of the fault point during high voltage impact to accurately locate the fault point. ② Dear customers: Hello, our company is a high-quality development group with strong technical force, providing high-quality products, complete solutions and superior technical services for the majority of users. The main products are high voltage cable fault tester, cable fault locator, intelligent 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!
How to Ensure the Correctness of Cable Identification by Live Cable Identification Instrument
How to Ensure the Correctness of Cable Identification by Live Cable Identification Instrument
In the 21st century, with the rapid development of railway, the speed per hour is faster and faster, and the marshalling operation is more and more intensive, it is necessary to ensure the normal operation of electrical service system. How to ensure the correctness of cable identification by live cable identification instrument, we will discuss and explain this problem below. In the electrical service support, the fault and construction of signal cable shall be tested and identified quickly. If the identification is wrong, it will have a very serious impact and cause train accidents. So let's talk about the identification of electrical service system. 1、 Current situation and disadvantages of signal cable identification in telecommunication system target cable identification is required in field work such as emergency repair, relocation and replacement of signal cable. Since there is no suitable instrument, most of our signal cable maintainers use the following methods to identify. First, wait for the skylight point, and remove the signal cable sheath when the skylight point; Secondly, two core wires are selected as the identification wire, and the two core wires are also found at the end; Finally, use the blade to cut the skin of the selected two core wires for short connection, and use the external meter to measure whether the selected two core wires are short circuited at the end. If they are short circuited, it means that the identification is accurate, otherwise, the identification is wrong. However, there are many disadvantages in using this method for identification: 1. Generally, such work is rush repair, which must be completed in the skylight point. If it takes up the time in the skylight point for identification, the rush repair time will be greatly reduced, and some even need to apply for two skylight points to complete a work; 2. After the selected two core wires are short circuited, the two core wires found at the end may not correspond, resulting in wrong results; 3. The outer skin and copper shield of the cable shall be broken. After identification, this place shall be restored. In the future, this place is a joint and a potential fault point. 4. The most important thing is that this identification often produces wrong results, resulting in operation accidents. 2、 Current status of cable recognizer 1. Current status of identification equipment (identification and attached identification): status of identification 1: conventional cable recognizer is designed for power cable identification and is widely used in the power field. Whether imported or domestic, it has two service conditions: 1) it has high requirements for the loop resistance of the target cable, Generally, it shall not exceed 50 ohms. If it exceeds the range of this circuit resistance, the equipment will not work normally, which is beyond the range of equipment use; 2) Disconnect at least one end of the outer armor grounding (same as shielding grounding) at both ends of the target cable, so that the applied signal cannot return from the target cable. Therefore, this power cable identification instrument is not suitable for the identification of electrical signal cables. Identification status II. When promoting digital path tester, some manufacturers publicize that the equipment has identification function. In fact, when using the digital path tester to identify, if the receiver touches the identified cable, which signal is the strongest, that is the identified cable. This recognition method has a single judgment basis in recognition, only the signal size, no signal direction, and can not be used as the final judgment. Moreover, such equipment has great attenuation on the signal cable, and the identification of long-distance signal cable can not be done at all. 2. Conclusion: the use conditions of power cable identification instrument and digital path tester determine that these two types of equipment are not applicable to the signal cable of electrical service system. 1) For the signal cable of electric service. The cable is very long, with a length of more than 5km, and some can reach more than 20km; The wire core is very thin, generally 1mm ² , The resistance is 23.5 Ω per kilometer, and the cable body resistance of more than two kilometers has reached the critical value of equipment test, so the loop resistance problem has become a hard wound of the conventional identification instrument. 2) In the electrical service system, it is very inconvenient to open the outer armor grounding (the same as shielding grounding) of the signal cable. The regulations of each Railway Bureau and railway line are inconsistent. Some cannot be opened, some must be opened in the skylight point, and must be restored before the end of the skylight point. Based on the above two points, the conventional cable identifier and Pathfinder can not meet the requirements of signal cable identification of railway electrical service system. 3、 During the test of railway signaling cable identifier, the requirements for loop resistance can reach 1000 Ω, and there is no requirement for armored grounding or ungrounded of the target cable. The utility model solves the difficult problem of identifying the signaling cable. The railway communication cable is specially designed and can be used online. It has the characteristics of micro power transmitting signal, has no crosstalk and interference to the data transmission of adjacent cables, and accurately finds out the required cable. The size double jaw configuration can not only identify the cable, but also identify the wire pair in the cable. Color large screen LCD, live voice prompt, friendly intelligent man-machine interface, and its unique intelligent orientation can indicate the signal direction, which makes the operation simple and practical. It is especially suitable for field use. Even untrained personnel can use it quickly. Through live measurement, it is not necessary to apply for night skylight time to cut off and repair cables. Workers in the front-line electrical service workshop can measure during the day, including when high-speed rail / Bullet train passes, which improves the timeliness and operability of detection.
Best Wire Tracker on the Market
Best Wire Tracker on the Market
The introduction of wire trackerIn recent years, the use of wire trackers has increased due to their ease of use and effectiveness. For those who need to be in touch with their customers around the clock, this is a convenient way to stay connected.In recent years, there has been an increase in the use of wire trackers. For those who need to be in touch with their customers around the clock, this is a convenient way to stay connected.Tips for wire trackerWiretrackers are the unsung heroes of copywriting. They are in charge of making sure that all pieces of copy are correctly placed and that anything content is coherent and easy to understand.While there's no standard set of things that a wire tracker does, here are some tips to help you do your job better:1. Make sure to keep a clean layout- it is important for wire trackers to be able to easily read what they're working on. Keep spacing between paragraphs and between headlines and text clear so they don't have any trouble doing their job.2. Put yourself in the reader's shoes- while you're writing, think about what the reader would be looking at if they were reading this article in print.How to use wire tracker?Wire tracking is a writing tool used in copywriting that consists of a thin wire with a pen attached to it. The wire is used for creating the first draft, and then the pen is used to edit and refine the work.It can be helpful for writers to use wire trackers when they are stuck in creative block or need fresh ideas right away.The specifications of wire trackerWire trackers are used to connect the two wires of a circuit to one another. They are commonly made of copper, aluminum, or rarely steel.Cable wire trackers help you to make an easier and more efficient connection between two wires. It is also important to make sure that the wire connections will be strong enough and will not break easily.The very first step you should take is measuring the length of each wire before deciding which type of tracker you need for your project. The size usually depends on what type of connector and junction box you're using for your project.The product instructions of wire trackerWire trackers are an essential part of any electrician's toolkit - they're used to make electrical connections and can be found in a variety of shapes and sizes.Whether you're an electrician or not, we all use tools like wire trackers daily. When you pick up a new product from your favorite hardware store, just like the one shown in this article, you'll likely find that the instructions are missing. However, this is often intentional as the manufacturer doesn't want to ruin their product by giving away too many tips.Sometimes however, there isn't a manufacturer or distributor for a specific product. In those cases, it's up to us as customers to figure out how best to use our new purchase. And that's where our guide comes in!The application of wire trackerWire tracker is a device that helps to install new wires and cables in difficult to reach places. It has a rotating saw which can cut through steel, plastic, copper, and wood.Wire trackers have been made in different sizes from 8’ to 16’ in order to cover a variety of applications. Its main purpose is to enhance the efficiency of the workers by making it easier for them to install cables or wires.The most important reason why wire trackers are popular with people is because they provide an efficient means for people who need to make repairs on their home or when they are doing renovations.
Best Cable Tester and Reviewer
Best Cable Tester and Reviewer
The introduction of cable testerA cable tester is a device that is used to test the quality of a cable. It can be used when people install their first home network to make sure that they have everything in place and are ready to connect all the devices.When people are setting up their first home network, there is always the fear that they might not have everything in place to connect all their devices efficiently. That's when they need a cable tester like this one.Cable testers come in different shapes and sizes, but this particular one makes it easy for users to test plugs and cables with ease. It also comes with an on/off switch for convenience purposes. There are multiple companies selling these types of products like Amazon or Best Buy, but it’s really important that you go through reviews before buyingTips for cable testerCable testers are the best way to ensure that you have the ideal cable for your TV. However, they come in a wide range of shapes and sizes.This guide contains tips to help you find the right one for your needs.How to use cable tester?As a cable tester, you need to identify if your cable has any problems. Here is a step-by-step guide of how to use a cable tester.If the connection is not strong or there are no picture and sound, troubleshooting starts by using the remote control provided in the package. You should also check if you have a faulty power cord as it may cause intermittent connections.When trying to fix the connection, make sure that you have an HDMI port on your TV and that it is connected with an HDMI cable. If both of these are not present, it causes signal loss and prevents viewing or sound from existing on your TV or speakers.The specifications of cable testerAs the technology is developing, more and more people are beginning to use these cable testers. Cable testers are designed with two screens that show both live video as well as a map of the cable's conductor.The manufacturer offers a three-year warranty on the tester. It also has a wireless remote control for viewing and controlling the program in real time.The product instructions of cable testerIn designing a new product, an engineer must consider many things - the needs of the customer, the needs of the company, and how to make sure they are meeting those needs. All of these factors will determine what instructions will be written for a product. In this section, I'm going to focus on product instructions and what they need to cover.The product instructions are an important part of your customer relationship. They should provide information about what your current customers need and how to use your products in detail. This includes wiring diagrams and other helpful information that can help people use it correctly and effectively.Product instruction should also include warnings about safe use as well as safety concerns about using it improperly could lead to personal injury or deathThe application of cable testerThe cable tester comes in handy during the installation of cables and wires, where it is used to ensure that the cables are safely and securely fixed.The cable tester facilitates the installation process by providing a safe way for users to connect wires without difficulty. It also provides an easy way of testing cables and ensuring that they are working properly before continuing with the installation process. Despite being a rarely used device, it is one of those indispensable tools which can be found in every home or office.The device has a simple design - it has two pieces of metal at either side which serve as terminals that connect to different points on data cables or electrical wires and provide an easy way for users to test if there is any voltage or current flowing through them.
How to Distinguish Between Phase Voltage and Line Voltage
How to Distinguish Between Phase Voltage and Line Voltage
What is the phase voltage? What is the line voltage? What are the relations and differences between them? This paper will interpret them one by one.Triangular connection and star connection without leading out neutral point have three terminal wires, three-phase system, three live wires, 380V, line voltage. The star connection leading out the neutral line includes three live lines, a total of four power lines, three-phase four wire system, one fire, one zero, 220V phase voltage. The line voltage is the vector sum of the phase voltages of two phases. Line voltage = 2 * phase voltage * cos30 degrees = root number 3 * phase voltage, i.e. 380 = root number 3 * 220Many times, the phase voltage is generally understood as the voltage between phases, that is, 380V, while the line voltage is understood as 220V, which is just the opposite.Concept:Phase voltage is what we often call 220V household voltage. The voltage between zero line and live line becomes phase voltage. In fact, all in our home are phase voltages.Line voltage refers to the voltage of any two live lines, that is, 380V, which is actually the phase voltage. The phase voltage is 220V and the line voltage is 380V.Relationship differences:In the process of long-distance power transmission, the higher the voltage, the lower the loss, which is why the country has been studying ultra-high voltage power transmission (I = u / R). Generally, the high-voltage power is transmitted to the end user, and then reduced to 220V / 380V through the step-down transformer to supply different users.For the three-phase four wire power network, the voltage between any one of the three phase lines and the zero line becomes the phase voltage; The voltage between any two of the three phase lines becomes the line voltage. The phase difference of the three-phase voltage is 120 degrees. The line voltage is the vector sum of the phase voltages of the two phases. The relationship between the line voltage and the phase voltage is: line voltage = 3 times the phase voltage of the root number, that is, 380V = 3 times the 220V of the root number (sorry, the mathematical root number 3 of the formula cannot be uploaded in the headline).The two-phase electricity is connected to the running three-phase motor, and the motor can still work. This is what we often say that the motor runs without phase, but it is easy to burn the motor in this way. After the three-phase motor with triangular connection is out of phase, the output power of the motor will also become two-thirds of the original three-phase power supply, and the other two windings only provide one-third of the power, resulting in three-phase imbalance, current imbalance and current imbalance. Of course, the motor is easier to burn out.After the star connected three-phase motor is out of phase, the motor output power is completely provided by two windings, and the load increases by 50% respectively. The other winding does not work, so the working current is unbalanced and the motor is easy to burn out. When two-phase electricity is connected to the stopped three-phase motor, the motor cannot be started. For single-phase motor, after connecting two 380V phase lines, the voltage becomes 380V, originally 220V. In this way, the voltage increases and the motor must be burned out.
Best Cable Tracker
Best Cable Tracker
The introduction of cable trackerCable TV is the future, and we are living in a world where people will be able to watch their favorite programs anywhere, anytime.Tips for cable trackerIn TV industry, one of the most important tasks is to find out who and what are the people watching your shows. It is really hard to do this job.How to use cable tracker?Cable trackers are part of a live communications system. While they can be used in a variety of different situations, there is one thing that they all have in common: they can help organizations to detect disconnected or out-of-sync communication links between people and devices.The specifications of cable trackerWith cable tracker, you can track the number of subscribers on a cable TV network. This way, you can know how much money your client is making from their cable channels.The product instructions of cable trackerUSA has some of the best-known cable TV providers. There are 18 channels in total, including one free channel. Most programs are broadcasted on satellite or cable. The main purpose of these channels is to get traffic to the advertisers' websites and for this purpose, they have to be reliable and functional. Most companies use a technical device known as a television tuner to receive the channels and they need their instructions in order to be able to control it, tune it or change its settings correctly. It is therefore necessary that if you want your company's website to get noticed by potential clients, you need reliable product instructions which are accurate enough so that people can understand them immediately and avoid any confusion regarding their products' functions.Most of the products have numerous settings and options, so there is no wayThe application of cable trackerA cable tracker is a device that allows us to identify and monitor our cable channels.
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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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