Guide to Buy Visual Fault Locator in NOYAFA

Guide to Buy Visual Fault Locator in NOYAFA

2021-10-22
NOYAFA
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On this page, you can find quality content focused on visual fault locator. You can also get the latest products and articles that are related to visual fault locator for free. If you have any questions or want to get more information on visual fault locator, please feel free to contact us.

visual fault locator developed by SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED is one product that should be highly recommended. On one hand, to ensure the overall performance and functionality of our products, our experienced professional team carefully select the raw materials. On the other hand, it is designed by professional experts who have rich experience in the industry and closely grasp the industry dynamics, so its appearance is extremely appealing.NOYAFA products have helped win more fame for us. Based on the feedback from customers, we conclude that there are several reasons. Firstly, thanks to the exquisite craftsmanship and unique style, our products have attracted an increasing number of customers to visit us. And, our products have helped customers gain more benefits at a surprisingly skyrocketing speed. Our products have been spreading to the market and our brand becomes more influential.In Best Cable Tester Supplier in China _ Noyafa, customers can not only get high-quality visual fault locator but also enjoy many considerate services. We provide efficient delivery that can meet customer's tight deadline, accurate samples for reference, etc.
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Wire Tracker to Find Any Email, Phone Or Chat Message in Minutes
Wire Tracker to Find Any Email, Phone Or Chat Message in Minutes
The introduction of wire trackerA wire tracker is a tool that identifies your digital presence and follows up on communication between you and others. It saves you from wasting time managing social media accounts, developing relationships with influencers in the industry, etc.Tips for wire trackerThis tip is for the copywriters who are looking to get additional income from their content writing.How to use wire tracker?According to the article, "The wire tracker is a plug-in that helps you keep track of all the data coming in from your website and social media accounts. Once you upload your content, this plug-in will collect details about the type of content and its distribution on different sites such as Facebook, Twitter and LinkedIn. The data collected by this plug-in will help you get insight into how people are using your content.The specifications of wire trackerA wire tracker is a device used to measure the speed of a wire. It is an important tool for quality control and risk management in the manufacturing industry.The product instructions of wire trackerA wire tracker is a device that is used in the manufacturing process to measure the length of the wires and mark them accordingly.The application of wire trackerThe application of wire tracker is the most important feature of wire-drives. This is because it allows you to identify keywords and phrases used in a marketing material. By using this information, you can identify and analyze copywriting mistakes.
Operating Steps of Live Cable Identifier
Operating Steps of 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!
Detection Method of Power Cable Fault
Detection Method of Power Cable Fault
1. Rough measurement of power cable fault (1) bridge method bridge method is a classical method of power cable fault location, which has a long history. Including DC resistance bridge method, DC high voltage resistance bridge method and capacitance bridge method. The resistance bridge method can only test some cable faults with low insulation resistance between single phase and ground or between two phases; High voltage bridge method is mainly used to test single-phase grounding fault or phase to phase and ground fault of main insulation with resistance greater than 10k Ω but less than megohm; The capacitance bridge method is mainly used to test the open circuit and broken wire fault of cables. The bridge method is relatively simple and convenient to operate, but it needs to know the original data such as the accurate length of the cable in advance. At the same time, it is not suitable for detecting high resistance faults. Most of the actual power cable faults are high resistance faults. Because the bridge current is very small when the fault resistance is very high, it is difficult for general sensitive instruments to detect. (2) Traveling wave method 1) low voltage pulse method low voltage pulse method is mainly used to measure the fault distance of open circuit, short circuit and low resistance faults of cables; At the same time, it can also be used to measure the cable length, wave velocity and identify and locate the middle head, T-joint and terminal head of the cable. Test principle: input a low-voltage pulse signal from the test end to the cable, and the pulse signal propagates along the cable. When encountering the impedance mismatch point in the cable, such as open circuit point, short circuit point, low resistance fault point, etc., a reflected pulse will be generated. The position of the fault point is calculated according to the round-trip time difference DT between the reflected pulse and the transmitted pulse and the pulse propagation speed v. 2) High voltage pulse method high voltage pulse method uses high voltage signal to turn cable fault into short circuit or low resistance fault instantly, so that the reflection coefficient of fault point is close to - 1, and the fault point almost produces total reflection. There are usually two basic flashover methods, namely direct flashover method and impulse flashover method. When testing cable fault by flashover method, the reflected wave formed at the cable fault point is high-voltage pulse wave, which cannot be displayed directly through the instrument. Generally, a sampler is needed to convert the high-voltage pulse formed at the fault point under the action of high voltage into the low-voltage pulse signal required by the instrument. According to different sampling methods, it is divided into voltage method, current method and voltage induction method. Wherein, R1 is the voltage dividing resistance, R2 is the sampling resistance, LP is the current sampler, C is the energy storage capacitor and B is the transformer. DC high voltage flashover method (direct flashover method): apply DC voltage to the fault cable to make the fault click through the room for discharge and flashover. Then, the fault distance can be calculated according to the transmission speed V of the traveling wave in the cable. The direct flash method is mainly used to test the flashover high resistance fault of power cable, and can also be used to test the leakage high resistance fault with particularly high resistance but lower resistance compared with the intact phase. Figure 6 shows the principle circuit of direct flash test. Impulse high voltage flashover method (impulse flashover method): due to the large equivalent internal resistance of DC high voltage power supply used in direct flashover method, the power output power is limited to a certain extent. For most leakage high resistance faults, direct flashover method cannot be tested. The impulse flashover method uses the high-capacity charging capacitor as the DC high-voltage power supply, which is connected to the fault cable to cause the flashover and discharge at the fault point to form an instantaneous short circuit. It is mainly used to test the leakage high resistance fault of power cable, and can also be used to test the low resistance, open circuit and flashover high resistance fault of power cable. The test principle circuit is basically the same as that of the direct flash method, except that a spherical gap is inserted between the energy storage capacitor and the cable, as shown in Figure 7. 2. Precise measurement of power cable fault point (1) acoustic measurement method uses the sound wave generated when the fault point is discharged for fixed point. The sound sensor detects the sound signal above the power cable. The place with loud sound is the location of the fault point. The farther away from the fault point, the smaller the vibration sound. (2) When the fault point flashover discharges under the action of impulse voltage, the acoustic magnetic synchronization method receives the electromagnetic wave and vibration sound wave generated by the discharge of the fault point at the same time, and judges whether the measured signal is generated by the discharge of the fault point to accurately judge the location of the fault point. (3) The audio induction method adds a certain power low-voltage audio signal to the fault of the cable at one end of the tested circuit. When the tested signal is transmitted to the short-circuit or disconnection point, it cannot continue to transmit along the cable, so there will be obvious signal size changes on both sides of the cable fault point. If the signal changes are detected through the receiver above the cable path, The location of the fault point can be determined. At the same time, the accuracy and integrity of various basic data of cables are also very important to improve the efficiency of fault point finding, such as cable laying direction, total cable length, distribution of cable intermediate joints, etc.
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.
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.
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.
Buried Cable Fault Detector
Buried Cable Fault Detector
Buried lines have been widely used in recent years. Therefore, many rural electricians and maintenance personnel are not familiar with the method of buried cable fault tester. If there is a fault in the buried line, without advanced instruments and better test methods, the fault can not be eliminated within the time limit of the service commitment of the power supply enterprise, which not only wastes time and manpower, but also affects the image of the rural power supply enterprise and frustrates the farmers' enthusiasm for the transformation of the rural power network. Therefore, it is urgent to be more professional in rural land buried line. Buried cable fault detector is a more effective fault detection instrument. Compared with buried cables, buried power cables have been used for decades in China. Buried cable fault tester has developed from resistance bridge, capacitance bridge test and standing wave test to flashover test. The development of the instrument has experienced the flash meter with ordinary oscilloscope tube display and the flash meter with storage oscilloscope tube display. Up to now, the intelligent instrument has been developed and produced. The buried cable fault tester adopts new technologies and processes such as large-scale integrated circuit, computer processing technology, large screen liquid crystal display technology and so on. After improving the power cable testing instrument, the buried wire fault is tested, and its effect is very good and efficiency is high. After a lot of practice, a buried line fault is generally tested. The buried cable fault tester is within 30 minutes from the beginning to the end, and the accuracy is very high.
In Depth Understanding of Live Cable Identifier
In Depth Understanding of Live Cable Identifier
Everyone should be familiar with the live cable identifier. Xiaobian introduced it in the previous article. It is a very common cable construction and maintenance equipment. At present, there are both instruments for identifying non operating cables and instruments for identifying operating cables. Now we will introduce some knowledge about live cable recognizer. 1、 The transmitter panel of live cable identification instrument is introduced as follows: 1. Signal output port: this port sends the signal to the cable to be tested through direct connection coupling. The instrument can automatically detect the connection mode (direct connection or coupling). When no output line is connected to this port, the screen mode menu displays idle, and no signal is output at this time. 2. Frequency switching: the instrument has four output frequencies: low frequency, intermediate frequency, high frequency and radio frequency. It is suitable for different test systems and has strong anti-interference ability. When this button is pressed, the frequency will be switched between the above frequencies in turn. 3. Power regulation: the instrument adopts constant power output mode, and low, medium and high gears are optional. When this button is pressed, the power will be switched between the above gears. 4. Backlight switch: the instrument has a backlight controllable function. The backlight can be turned off during the day to save power. At night, the backlight can be turned on for test. When this button is pressed, the backlight will be turned on. When it is pressed again, the backlight will be turned off. 5. Power switch: the main switch of the whole instrument. When this button is pressed, the instrument enters the test interface. 6. Liquid crystal display of cable identification instrument: the instrument adopts liquid crystal display for man-machine dialogue. 2、 Precautions for the use of live cable identifier 1. If the operating cable has voltage and there is no load, there is no current flowing on the cable. At this time, the magnetic field cannot be detected. It is considered to be an uncharged cable, which is very easy to misjudge. 2. If the cable is not running, but if this cable is parallel to other running cables, there will be induced current and magnetic field. At this time, the instrument will also have indication, and misjudgment will occur. 3. If there are multiple cables in the cable trench, these multiple cables will generate a magnetic field. At this time, there will be a magnetic field generated by 50Hz current in the whole area. At this time, there will be a magnetic field in the whole area, which makes the discrimination impossible. It is easy to misjudge. 3、 Basic parameters of live cable recognizer insert 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 clamp the transmitting caliper a on the identified cable. The arrow on the transmitting caliper a points to the cable terminal. 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 the identification point, identify each cable with receiving caliper B. 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.
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