Shop Best Ip Camera Test Monitor in NOYAFA

Shop Best Ip Camera Test Monitor in NOYAFA

2021-10-25
NOYAFA
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SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED takes pride in providing the high quality ip camera test monitor. We never let the defective product occur in the market. Indeed, we are extremely critical in terms of product qualification ratio, ensuring that every product reaches customers with a 100% pass rate. Besides, we keep it inspected in every step before shipment and will not miss any defects.To make NOYAFA an influential global brand, we put our customers at the heart of everything we do, and we look to the industry to ensure that we are better placed to meet the changing needs of customers around the globe, both today and in the future.At Best Cable Tester Supplier in China _ Noyafa, we offer a range of customized services to help meet your unique business goals. We are fully equipped to provide high quality customizable ip camera test monitor and get your orders delivered to you on time.
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Cable Tracker to Find the Right TV Service
Cable Tracker to Find the Right TV Service
The introduction of cable trackerCable tracker is a device used by cable providers to check the status of their lines. It is a simple, non-invasive and quick way to detect faults in cables or cables that are not working at all. It helps technicians to effortlessly identify and repair issues quickly and efficiently.The introduction of cable tracker began when the National Cable Television Association (NCTA) first came up with this idea as it wanted to prevent service interruptions by providing an easier method for cable providers to spot faults in their lines. The NCTA was founded in 1972 as the United States’ first cable television industry trade organization for the American cable television industry.This article discusses how important it is for communications companies like Cable TV companies in order to avoid disruptions and access uninterrupted service.Tips for cable trackerCable trackers are a type of device used to identify the location of underground cables. This device is mostly used for utility and construction companies.This article is going to help you understand how the cable tracker works, how you can use it, and common mistakes to avoid.In this article, we will go over the following:1) How does a cable tracker work? 2) Common mistakes people make when using cable trackers 3) Tips for making your life easier with cable trackersHow to use cable tracker?Cable trackers are used to guide the cable wire through the wall. There are two types of cable trackers: straight and angled. Straight trackers can be used when drilling holes through a plasterboard wall, while angled ones can be used to guide cables through a brick or stone wall.I recommend that you use straight cable trackers if you need to drill holes in your walls, but if you want to use them for other purposes, then I recommend that you use angled ones. This is because they can be more difficult to install in brick or stone walls than straight ones.There are different types of cable tracker on the market and depending on their designs, some of them have more features than others. However, as long as they follow the same principle with their design, then they should workThe specifications of cable trackerCable tracker is a device that is used to align the cables in the house which are going through walls and floors.The cable tracker attaches to a wall, and then the cables go through its slots. The cable tracker can be placed on any surface and as soon as it touches the surface, it starts tracking over it.Most of these trackers have a slot for attaching a charger.These trackers also come with an app which you can use to control them remotely. The app makes it easy for you to see what your cable tracker is doing at all times.The product instructions of cable trackerCable tracker is a small device used for television cable and satellite TV. A cable tracker is a device that can tell you the right distance between your current location and the closest location to the desired channel.The product instructions of cable tracker say that it should be used on flat surfaces. This means that if you are using it on carpet, you should be extra careful when using it.It’s important to read the product instructions of cable tracker before using it so that you don’t get in trouble with your TV provider because of their terms and conditions.The application of cable trackerMany companies in the cable industry are using cable tracker machines to put together bundles. Cable tracking is a process of assembling, bundling and assigning individual price points to the various channels in a package.Cable tracker machines are used by cable operators and suppliers. They help bundle channels together for a specific customer contract. The operator can also use them to track the activity of their customers on their own side of the business to see what they want and what they don't want.
Problems Needing Attention in Field Repair of Wires and Cables
Problems Needing Attention in Field Repair of Wires and Cables
In the process of cable laying on site, the phenomenon of scratch and damage on the surface of cable sheath is common, and only the sheath is damaged slightly. How to repair can ensure the quality, short repair time and ensure the quality has increasingly become a common concern of cable consumers. Moreover, the investment is small and easy to realize under the bad conditions on site. Therefore, the repair technology and quality of on-site sheath have increasingly become the concern of users. The on-site construction conditions of cables are generally poor, which may be located in the power plant under preliminary construction, the newly-built field railway under preliminary construction, on the bridge or in the cable tunnel. Because the repair of field cable sheath is carried out with plastic welding gun, and the heating of plastic welding gun requires 220V AC, it is in the emerging field project, Generally, there is a lack of power supply on site, or there may be power supply. Due to the randomness of the laying position of on-site cables, it is difficult to provide power supply. Therefore, to repair the cable sheath, on the one hand, the personnel are in place, on the other hand, the power supply is mainly provided. Only the above two basic preparations can be made, In order to realize the normal development and progress of cable sheath repair. In order to facilitate the smooth repair of cable sheath field, the construction unit shall be equipped with field small generators. At the same time, it is convenient for on-site repair. The quality of the plastic welding gun provided now should be excellent. The heating area of the nozzle should be large and the heating speed should be fast. Moreover, the damaged parts in the cable setting out process are random. This work is easy to carry out in general cities and plain areas, but in some mountainous areas, due to the influence of complex terrain, the cable repair work is actually very difficult. Therefore, in order to reduce the investment in corresponding aspects and quickly solve the problem, a key problem is that the number of personnel in the cable laying process must be sufficient, and formal cable laying equipment shall be used for formal setting out, so as to avoid and reduce the damage of sheath in the cable setting out process. The technology required for on-site cable repair is not very high. After the cable is damaged, the cable laying construction unit must repair the cable on the premise of confirming that there is no damage inside the cable, otherwise the cable sheath repair has little practical significance. The cable must be repaired in time, otherwise the entry of external moisture and moisture will affect the service life of the cable. In Meiyu weather in the south, after the cable end is laid, the cable end is not sealed in time, resulting in the water flowing into the cable trench entering the cable end for 10-20 meters. After stripping the insulation of the end, it is found that all the conductors have been blackened, resulting in the waste of the cable after laying. Therefore, the inspection of the cable after laying should be strengthened, Maintenance and storage shall be carried out to prevent the shortening and termination of cable life caused by various external factors on site before power on. Some tools and materials used for on-site repair of cables must be fully prepared. Plastic welding gun is necessary. High voltage insulating tape, waterproof tape, peeled leather of plastic insulation and sheath, and other sealing materials must also be prepared, because cable insulation and sheath materials are mainly divided into cross-linked polyethylene, polyethylene, polyvinyl chloride and other materials. Some materials are thermosetting materials, such as cross-linked polyethylene insulation, which cannot be melted and reused again. They can only be repaired with high-voltage insulating tape and repair tape series provided by 3M company in the United States. Some materials belong to thermoplastic materials, which can be melted and used again at high temperature, such as polyethylene, polyvinyl chloride and other materials. Some materials can be taken on site, and the corner sheath material stripped from the cable end can be cut into thin strips to repair the insulation and sheath of low-voltage cables, The repair quality can fully meet the requirements of the normal service performance of the cable. In addition, the treatment of sheath damage of medium voltage cable during on-site laying should not be too rough. One is that the cable must be handled with care during the laying process. In addition, after the external damage of the cable, the damage of its internal insulation is sometimes hard to say, The author once conducted a return test on the cables with multiple damaged outer sheath caused by careless construction in the field laying process, and found that partial discharge exceeded the standard and breakdown occurred in the damaged parts of the cables. Therefore, for medium voltage power cables with damaged outer sheath in the field laying process, it is best to cut off the intermediate joint or replace the cable again, Because there may be hidden dangers after repairing the damaged part of the cable. Facts have proved that the repair of insulation and sheath of low-voltage cables must be slightly damaged. The repair of insulation and sheath can only be carried out on the premise that the insulation and sheath are damaged and other structures of cables are intact. The requirements of medium and high-voltage cables may be more stringent. In order to reduce the number of intermediate joints of cables in cable transmission of some projects now, All cables are long-length single core cables. Due to the long laying distance of the line, responsible terrain, the number of construction personnel and the lack of professional cable laying equipment, the probability of cable sheath damage during the construction process is greatly increased. After the above problems occur in some construction, it is irresponsible to wrap a bag of ordinary tape casually. There is no knowledge of the internal damage of the cable damage point. Insulation breakdown or potential quality hazards are likely to occur during the on-site completion test and later operation of the cable.
Best Wire Tracker
Best Wire Tracker
Tools can make us lazy and make us think that our work is never done. A great example would be the use of the email wire tracker - a tool that lets you know when your emails have been sent to all your contacts.Wire Tracker is an automated email tracking tool that allows you to see which emails you have sent to which recipient(s) and when. It creates charts showing which recipients have received each of your emails. Once you start using it, you will quickly realize how valuable this tool can be in daily life.In this section, we will go through the best tools available in the Google Play Store.In this section, we will discuss one of the most popular software in the market: Wire Tracker.Wire Tracker is an application that allows you to track your web traffic and optimize it by collecting keywords, phrases, and URLs that you want to rank for on search engines like Google. It provides a number of tools such as keyword/phrase analyzer, web reputation analyzer, URL analyzer, tracking tool and many more.We all know that having a wire tracker is one of the essential tools to keep track of content at your fingertips. But with the plethora of free wire tracking tool out there, how do you choose the right one?What does it take to be a good wire tracker? There are some simple things you need to do:It is very important to get in touch with your client or employer. It will help you decide what content to include and how to present it.The best and most useful tool for website owners to track their social media pages.The basics of tracking social media accounts are fairly easy. The software can be used to save a page’s URL, its title, and the links that lead to its content. The software also allows you to track the number of impressions sent from your website. When tracking numbers, you should use a Google Adsense account.When your site has a large amount of content and there is no way to easily categorize it, it can really affect the usability of your site. The best solution for this is creating a wire tracker, which categorizes all content that users need to find on your page.This article lists all the best wire trackers available today. While this list shows you some popular ones, you can also use these in case you don't know what a wire tracker is or how it works:Why is "Best Wire Tracker" the best wire tracker?##Section topic: Using Content Marketing as a CPA Campaign, and How to do it wellIntroduction: With content marketing as a CPA campaign, you can generate huge amounts of traffic for your company. But there are many things to consider. The reason why Content Marketing is not suitable for every company. And it is also not suitable for all companies. A good content marketing strategy should be tailored to your business needs and target audience. There are some problems with Content Marketing that need to be overcome before you can start using it effectively in your business.The best way to reach your target customers is to create a relevant, easy and quick e-mail. However, there is an issue with the currently existing tools - they are not that effective and most of them are not user friendly. To overcome this issue, a new tool was designed to help webmasters generate more relevant content in less time.Wire Tracker is a TextToSpeech API. It helps you write text to be spoken aloud by your voice assistant. It provides an easy way to convert your text into speech and it also supports most of the voice assistants such as Amazon Echo, Google Home, Apple Siri and Microsoft Cortana.Classic content marketing solutions such as newsletter and webinars are all about getting the right message to the right audience. However, if you want to reach out to your own audience with a certain message then all you need is a simple tool that can help you create it.The best wire tracker is Amazon, but it's all about the best free wire tracker.There are lots of free wire trackers out there, like the following ones:
How to Quickly Locate Cable Faults
How to Quickly Locate Cable Faults
With the different cable laying methods, the difficulty of cable fault location is gradually increasing. Among them, the positioning and search of bridge, tunnel and open laying in ditch is relatively simple, and the positioning and search of direct burial is the most difficult. When the fault nature is simple, the special cable fault location equipment can be used to locate the fault within dozens of minutes. When the fault is special, it often takes 4-5 days or even longer to locate the fault. How to quickly locate cable faults? When using echo method for cable fault location, sometimes by transferring the fault phase and wiring mode, complex faults are often transformed into simple faults, and the fault location is quickly determined to win time for the emergency repair of on-site lines, which is of great significance to the power supply user department. Low voltage power cables are generally multi-core cables. After laying and continuous use, 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 a 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 cross-section copper core directly buried power cable (35mm2 and below) and aluminum core cable may be accompanied by short-circuit and wire breaking fault at the same time. During on-site detection, changing the short-circuit fault to wire breaking 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 insulating core fails, the inner lining may have been damaged. In case of special cable insulation fault, it is difficult to collect waveform with professional cable fault instrument. It can be considered to use the acoustic method to apply the high-voltage pulse directly between the steel strip and copper shielding layer of the cable, which will often be fixed quickly. In the field measurement process, we also found that when using the acoustic measurement method to locate the fault point of low-voltage cable, when the high-voltage line and ground wire are connected between the bad phase and the metal shield or armor, 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 site for many times, it is found that if the distance between the discharge ball gap is appropriately increased, and the high voltage and grounding wire are connected between the two phases of the fault, the discharge sound will become larger and the fault point will be determined quickly.
How to Use the Wire and Cable Fault Tester to Quickly Find the Fault Point
How to Use the Wire and Cable Fault Tester to Quickly Find the Fault Point
In case of cable fault, power workers usually need to use cable fault tester to determine the location of fault point, so as to facilitate power workers to maintain cables. What problems should be paid attention to when using wire and cable fault tester to test fault points? Xiaobian summarized the following points on this issue. I hope you can solve your doubts and answer questions. Interested friends can have a look. 1. The gap between the discharge balls should not be increased. After using the cable fault comprehensive tester to roughly test the position of the fault point, if the gap between the discharge balls is adjusted too large, the impulse voltage will become higher, the high-voltage impulse time is too long, the fault point will be short circuited, the fault point will not discharge, and the fault point is difficult to find. Therefore, it should be noted that the gap between the discharge balls should not be adjusted too large. 2. In special cases, two fault testers can be used. If the soil layer is too thick, the surrounding environment has great interference, or the cable itself is damaged, resulting in weak vibration signal transmitted to the ground when the fault point is discharged, which makes it difficult to locate the fault point, two wire and cable fault testers can be used by taking advantage of the simultaneous occurrence of vibration wave and electromagnetic wave generated during fault click discharge. Use the probe and the probe to work at the fixed point at the same time. When two instruments hear a bang at the same time, and then find the sound point, we can accurately find the location of the fault point. 3. How to find the loudest point at the fixed point: after hearing the regular discharge sound, move the tester back and forth along the direction of the cable to find the position with large discharge sound. At this time, pay attention to reducing the output volume of the tester, and then slowly find the place with a loud sound. 4. Pay attention to replacing the battery. When the instrument is not in use, the power supply needs to be turned off in time. If the battery is low, the sensitivity of the instrument during test may be reduced, resulting in increased noise. Consider changing the battery at this time. 5. Check the wiring. If the shielding layer of the input line of the instrument is in poor contact, resulting in the sound of the radio station from the headset, you can check whether the wiring is correct. Precautions for cable laying: I. when using drainage pipes, the following provisions shall be observed: 1. The number of pipe holes shall be properly reserved according to the development needs. 2. For cables with large difference in conductor working temperature, different pipe banks should be set at appropriate spacing. C. the covering thickness of pipe top soil shall not be less than 0.5m. 3. The pipeline shall be placed on the leveled and compacted soil layer, and sufficient cushion blocks shall be provided to keep it continuous and straight; The longitudinal drainage gradient shall not be less than 0.2%. II. Requirements for cable wells. 1. Cable wells shall be set in the following parts of long cable ducts: (1) the limited distance of traction force between cables. (2) Cable branches and joints. (3) The direction of the pipeline changes greatly, or the cable goes directly underground through the drainage pipe. (4) The slope of the pipeline is large, and the fixation must be strengthened to prevent the cable from sliding. 2. Cable trench in power distribution room cable trench in power distribution room is generally used for incoming and outgoing lines of power distribution equipment, which is basically divided into under cabinet trench and double line trench. The cable trench wall is mu10 autoclaved lime brick, M5 cement sand, 1:2 cement mortar plastering of the trench wall, C20 concrete for coping and foundation, and channel steel shall be embedded under the equipment.
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.
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.
Technical Specifications of Cable Fault Detector
Technical Specifications of Cable Fault Detector
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 locate the * *. 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!
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.
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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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