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The Chinese Spring Festival, also known as the Lunar New Year or Chinese New Year, is the most important traditional festival in China, marking the beginning of the lunar calendar year. It typically falls between late January and mid-February and is celebrated with a variety of customs and activities that emphasize family reunions, cultural heritage, and hopes for prosperity and good fortune in the coming year.   ### Key Features of the Spring Festival: 1. **Family Reunion**:    - The festival is a time for families to come together, often traveling long distances to reunite. The **Reunion Dinner** on New Year's Eve is the most important meal, featuring dishes symbolizing luck, wealth, and happiness.   2. **Decorations**:    - Homes are adorned with red decorations, such as **lanterns**, **couplets** (poetic phrases on red paper), and the character "福" (fu, meaning "fortune") hung upside down to symbolize the arrival of good luck.   3. **Fireworks and Firecrackers**:    - Fireworks and firecrackers are set off to ward off evil spirits and celebrate the new year with joy and excitement.   4. **Red Envelopes (Hongbao)**:    - Elders give red envelopes containing money to children and unmarried adults as a symbol of good luck and blessings for the new year.   5. **Lion and Dragon Dances**:    - Traditional performances like lion and dragon dances are held in streets and public spaces to bring good fortune and drive away bad luck.   6. **Traditional Foods**:    - Special foods are prepared, such as **dumplings** (symbolizing wealth), **fish** (representing surplus), and **nian gao** (sticky rice cake, symbolizing growth and progress).   7. **New Year Greetings**:    - People exchange greetings like "新年快乐" (Xīnnián kuàilè, "Happy New Year") and "恭喜发财" (Gōngxǐ fācái, "Wishing you prosperity").   8. **Zodiac Animals**:    - Each year is associated with one of the 12 Chinese zodiac animals. For example, 2023 was the Year of the Rabbit, and 2024 is the Year of the Dragon.   9. **Temple Fairs**:    - During the festival, temple fairs are held, featuring traditional performances, food stalls, and games.   10. **Lantern Festival**:     - The Spring Festival culminates with the Lantern Festival on the 15th day of the lunar new year, where people light and release lanterns, solve riddles, and enjoy sweet rice dumplings called **tangyuan**.   The Chinese Spring Festival is not only celebrated in China but also in many other countries with significant Chinese communities, making it a global cultural event. It embodies themes of renewal, gratitude, and hope for a prosperous future.

We took this opportunity to know more about electrical industry and met some old friends and new friends. To communicate with some exports. We will meet again next year.

Determine according to different usage scenarios and parameters When the protection objects of windproof fuses are different, the selection of fuse types is also different. For example, for the protection of lighting circuits with small capacity or low-power motors, RC1A series plug-in fuses should be used because of the melting coefficient of the melt. Smaller is conducive to overcurrent protection of the circuit. On the contrary, for the protection of large-capacity circuits or high-power electrical appliances, other overcurrent protection devices must be installed in addition to fuses. If you encounter a circuit with a large expected short-circuit current or a flammable gas situation, you can consider choosing RL series spiral fuses or RT series high-breaking fuses with high breaking capacity. Otherwise, you can use RM10 series fuses. Should have good coordination with the overload characteristics of the protected object Most electrical equipment has a certain overload capacity. Under certain conditions, excessive operation in a small amount and for a short period of time is no problem. For example, when high-power appliances such as air conditioners are started, the current will double and the fuse will You have to adapt to this characteristic, otherwise it will be very troublesome to break the circuit breaker easily. Overstepping of fuses should be prevented There must be good coordination between windproof fuses at all levels. Generally, the rated current of the upper level melt is about 2 to 3 times greater than the rated current of the lower level melt. When a fault occurs, the lower level fuse blows first. , and at the same time, after it is blown, the upper-level fuse can automatically recover. Otherwise, once an overlevel fuse occurs, a small wire short circuit may cause a large-scale power outage. Attention should be paid to the influence of motor starting current Considering the influence of motor starting current, fuses are generally only used as short-circuit protection of motors, and thermal relays should be used for overload protection. Correct matching of rated power and melt rated current The rated power should not be less than the rated current of the melt, and the rated breaking capacity should be greater than the larger short-circuit current that may occur in the circuit.

The grounding module has built-in copper-plated flat steel, galvanized flat steel, and copper bars. When it is connected to the protected ground wire, the effective contact area between the metal grounding body and the soil will be greatly increased. Since the grounding module has strong moisture retention, hygroscopicity and stable conductivity, the contact resistance between the metal grounding body and the soil will be greatly reduced, making the resistance reduction effect of the grounding module more significant. Ground module performance characteristics ● The contact area between the ground module and the earth is large (about 0.6m²). ● The grounding module can form good contact with various types of soil and rocks to achieve the effect of reducing grounding resistance. ● The grounding module has strong moisture absorption and moisturizing effects, which can reduce the resistivity of nearby soil. ● Through the good ion dispersion of the grounding module, the ions can be dissipated into the soil 3-5 meters underground, forming a stable ion layer, improving soil properties in a wide range, thereby reducing the soil's dispersion resistance. ● The dissipation of ions can lead to farther and deeper soil, connected to the low resistivity areas of the soil: underground soil layers with low resistivity, groundwater layers and metal mineral layers to improve dispersion. ● The preservatives contained in the grounding module can make its theoretical life more than 50 years, which is much longer than the service life of galvanized steel pipes. ● If only the grounding module is used as a resistance reduction method in the grounding network, without considering the role of the grounding flat steel, the corrosion of the grounding flat steel will not affect the resistance reduction effect of the grounding module, and the grounding flat steel and other horizontal grounding bodies are only used as connecting wires If the ground network is used, the comprehensive use time of the ground network is greater than 50 years. ● After the grounding module is subjected to multiple large current impacts, the grounding resistance does not increase, nor does it become hard, brittle, or break. ● Since the grounding module uses stable non-metallic conductive materials as the conductive medium of the module, it is corrosion-resistant, non-toxic, has a long service life and is easy to construct. Its conductivity is not affected by seasons. ● The excellent grounding effect of the grounding module can reduce the effective length of the grounding cable.

The grounding module is a grounding body made of carbon material as the main body. It is composed of non-metallic minerals with good conductivity and stability. TK series grounding modules are divided into LJA-01 three-hole triangular type, three-hole hexagonal type, and solid hexagonal type. What are the advantages of grounding modules? Let`s find out below. 1. The main material of the grounding module has a similar physical structure to the soil and can be integrated with the soil. The effective contact area between the ground body and the soil is many times larger than that of the metal ground body, which increases the effective dispersion area of the ground body and greatly reduces the contact resistance between the ground body and the soil. Therefore, it can significantly improve the grounding efficiency and reduce the ground network. Land area occupied. 2. The grounding module itself has a strong ability to absorb moisture and keep the soil around it moist, ensuring that the grounding module can effectively perform its conductive function; At the same time, the conductive properties of the conductive objects in the grounding body are not affected by seasonal changes such as dry humidity, high and low temperatures. Therefore, stable ground resistance can be provided. 3. The non-metallic material of the grounding module forms a low-resistance area with a relatively gentle change between the metal and the soil with a huge difference in resistivity. When a large current impacts, it can reduce the transient potential gradient of the grounding body and grounding wire, and reduce the step voltage and contact voltage to reduce the probability of ground potential counterattack. 4. The main body of the grounding module itself is made of anti-corrosion material, and its metal skeleton is made of metal materials with anti-corrosion treatment on the surface. Therefore, the grounding body has excellent overall anti-corrosion performance and a service life of more than 30 years. 5. The grounding module can be buried vertically or horizontally, and the burial depth is generally 0.8~1.0 meters. It has strong moisturizing, hygroscopicity and stable conductivity. The contact resistance between the metal grounding body and the earth through the peripheral non-metallic module material will be greatly reduced, achieving a good resistance reduction effect.

Composite insulator series It focuses on the research of new high-strength functional glass manufacturing technology and the development of ultra-high voltage power transmission and transformation insulation equipment. Its main business is glass insulators for insulating and suspending wires on electric lines. The products include 4 major series, 30 varieties and 63 specifications and models, with line voltage levels covering the range of 10kV to 1,000kV.

An electrical appliance that uses a metal conductor as a melt in series in a circuit. When an overload or short-circuit current passes through the melt, it heats up and melts, thus breaking the circuit. Fuses have a simple structure and are easy to use. They are widely used as protection devices in power systems, various electrical equipment and household appliances. Next, the windproof fuse manufacturer will tell you about the working principle of the fuse. How fuses work The working principle of the fuse is a simple I2R versus time relationship. After the current exceeds the specified value for a period of time, the fuse uses its own heat to melt the melt, thus disconnecting the circuit. In power distribution systems, control systems and electrical equipment, fuses, as protectors for short circuits and severe overcurrent, are one of the most commonly used protection devices. The fuse has anti-delay characteristics, that is, when the overload current is small, the fusing time is long; when the overload current is large, the fusing time is short. Therefore, within a certain overload current range, when the current returns to normal, the fuse will not blow and can continue to be used. Fuses have various fusing characteristic curves, which can adapt to the needs of different types of protection objects. The fuse is connected in series in the circuit. When an overload or short-circuit fault occurs in the circuit or electrical equipment, the melt of the fuse melts first and cuts off the power supply to protect the circuit or electrical equipment. It is a short-circuit protection appliance. The function of fuse It mainly plays a role in protecting the safe operation of the circuit. A fuse is an electrical appliance that, when the current exceeds a specified value, uses the heat it generates to melt the melt and disconnect the circuit. When a fault or abnormality occurs in a circuit, the current continues to increase, and the increased current may damage some important or valuable components in the circuit, burn the circuit or even cause a fire. If the fuse is correctly installed in the circuit, then the fuse will blow itself and cut off the current when the current abnormally rises to a certain height and at a certain time, thereby protecting the safe operation of the circuit.

There are many types of lightning arresters. The most commonly used one is the internal valve type arrester, which is mainly composed of a spark gap and a valve plate connected in series. When there is no lightning invading the low-voltage circuit, it can prevent the line current from flowing to the earth. Once overvoltage occurs, the spark gap can discharge, thus limiting the overvoltage to a certain amplitude to achieve the purpose of lightning protection. The other is a zigzag spark gap arrester, which can be made by yourself in rural areas. It is made of two zigzag metal strips modified in a low-voltage fuse box. The air gap can generally be set within the discharge range of 2000V. Under normal conditions Under normal circumstances, it does not discharge. If overvoltage is caused by lightning, spark discharge will occur and the lightning will be directed to the earth, thereby protecting the electrical equipment. This kind of lightning arrester is low in cost and easy to make, and can be widely used in mountainous areas to protect electricity meters and other electrical equipment. Its disadvantage is that the gap is burned out after one discharge. After the thunderstorm, it needs to be replaced with a newly installed zigzag spark gap arrester.

Windproof fuse will tell you about the important role of fast fuse Fuses and quick disconnects protect electronic products from current damage and can also avoid serious damage caused by internal structural failures of electronic products. Therefore, each fuse has a rating, and the fuse will melt when the current exceeds the rating. When the current between the relevant standard rated breaking levels and the basically uninterrupted current acts on the fuse, the fuse should be able to work satisfactorily without seriously harming the surrounding environment. The estimated fault current of the circuit to which the fast-acting fuse belongs needs to be lower than the standard rated breaking capacity current. Otherwise, when the fuse blows, there will be continuous arc discharge, sparking, blown fuse, and melting of the contact piece. Distinguish the phenomenon of fuse traces. Of course, the breaking capacity of fake and inferior fuses cannot meet the standard requirements, and it will also cause adverse effects when used. Hugong Electrical Appliances In addition to quick-blow resistors, there are also general fuses, thermal fuses and self-healing fuses. Generally, protective components are connected in series in the circuit. When abnormal conditions such as overvoltage, overcurrent, or overtemperature occur in the circuit, they will melt immediately, which can prevent further expansion of common faults and has a protective effect. A general fast fuse is usually composed of a glass tube, a metal cap and a fuse. The two ends of the glass test tube are covered with two metal caps, and a fuse is installed in the glass test tube. The two ends of the fuse are welded to the middle holes of the two metal caps respectively. During use, the fuse is installed on the child safety seat and connected in series with the circuit. The fuses of fuses are basically linear, and only the delay fuses used in color TVs and computer monitors are spiral fuses. The basic parameters of a general fast fuse are rated current, rated voltage, operating temperature and reaction rate. The current that the fuse can melt under the rated current is the rated voltage. The normal operating current of the fuse is 30% lower than the rated voltage. Imported fuses are marked on the glass tube with a color wheel, while the rated voltage of domestic fuses is generally marked directly on the metal cap.

1. Raw materials Composite insulators include core rods, sheaths, sheds, hardware and other parts. The core rod material is mainly epoxy glass fiber, and the sheath and shed materials are high-temperature vulcanized silicone rubber. Among the epoxy glass fibers that make up the core rod, the glass fibers arranged parallel to the axis are the skeleton. With epoxy resin as the matrix material, the glass fibers are bonded together to form an epoxy glass drawing rod. The tensile strength of epoxy glass drawing rods can reach 2.5 times that of ordinary carbon steel. The high-temperature vulcanized silicone rubber that makes up the umbrella skirt material is made of silicone rubber as the base, and is vulcanized at high temperature by adding fillers such as coupling agents, flame retardants, reinforcing agents, and anti-aging agents. Among them, silica is commonly used as reinforcing agent, and aluminum hydroxide is commonly used as flame retardant. Domestic composite insulator shed materials are mainly made of methylethylene silicone rubber material as the matrix. The molecular formula is as follows. 2. Production process ① Production of epoxy glass drawing rods Epoxy glass drawing rod is made by impregnating glass fiber with epoxy resin, then vacuum injection, continuous pultrusion and solidification. Vacuum injection: first lay glass fiber on the mold (single-sided mold), then lay the flow guide net, and extract the air in the system to form a negative pressure in the mold. The negative pressure is used to suck the resin into the fiber through the pre-laid pipeline. layer, allowing the resin to fully infiltrate the fiberglass. Pultrusion: Under the traction force of the pultrusion equipment, the glass fiber is fully impregnated with epoxy resin and then rationally guided by a series of preformed templates to obtain its initial shape. Curing: After the initial shaping, the drawing rod enters the heated metal mold and reacts and solidifies under the action of high pressure. ② Rubber production Ingredients: Configure silicone rubber raw rubber and various additives (such as reinforcing agent silica, flame retardant aluminum hydroxide, etc.) according to a certain ratio. Mixing: Gradually add silica black, aluminum hydroxide, etc. and other additives to the silicone rubber raw rubber for repeated refining to make the additives evenly distributed in the rubber material to form synthetic rubber. Vulcanization and re-refining: Add vulcanizing agent to the rubber compound and mix again. ③ Injection assembly Metal tool grinding and sandblasting: Grind the contact part between the metal tool and the mandrel and silicone rubber, and spray tiny particles on the surface. Grinding and sandblasting remove surface contamination while making the corresponding surface have a larger contact area, which is conducive to obtaining a good end. Mechanical strength, good contact with silicone rubber, ensuring sealing effect. Grinding, cleaning and drying of the mandrel: Grind the FRP mandrel to ensure full contact between the surface and the adhesive. Clean the FRP mandrel to remove dust particles on the surface. Dust particles will cause poor bonding, which will lead to operational composites. Internal discharge defects of the insulator; the core rod needs to be dried in time after cleaning to ensure that the core rod does not absorb moisture. Coating agent: Apply coupling agent evenly on the surface of the core rod. The function of the coupling agent is to connect the sheathed silicone rubber and the glass fiber core rod together. The commonly used coupling agent is a silane coupling agent, which has a silane coupling agent at one end of its molecule. The epoxy-friendly group has a silicone-friendly rubber group at one end, which reacts under a certain temperature and pressure to form a three-dimensional cross-linked structure to connect the silicone rubber and the glass fiber core rod together. Injection vulcanization: Put the mandrel into the silicone rubber injection mold, inject the rubber, and discharge the gas generated during the process; control the temperature to fully vulcanize the silicone rubber material. After vulcanization, cross-linking occurs between the silicone rubber macromolecules, improving the material's durability. Aging resistance. Trimming: Trim the flash on the edge of the silicone rubber umbrella skirt and the mold closing seam. Crimping: Use a crimping machine to perform crimping. Generally, the end fittings are squeezed evenly and centripetally from 8 directions, causing slight deformation of the fittings and the mandrel, forming prestress between the fittings and the mandrel, which occurs when the fittings are subjected to tension. friction to achieve a stable end connection structure. Sealing: Apply high-temperature vulcanized silicone rubber to the end fittings to ensure that the ends will not be invaded by external moisture. Some manufacturers can complete this step at the same time during injection molding.

1. Understand the power distribution system First of all, you must know your own power distribution system, whether it is TT, TN or IT system. Only by knowing the power distribution system can you determine the single-phase, three-phase, wiring method, etc., and determine the location of product installation, so as to choose the appropriate lightning protection system. product. 2. Understand the important parameters of the arrester Arrester parameters are very important, and understanding the parameters and their meaning is the key to selecting an arrester. You need to know the following parameters: (1) Nominal voltage Un: The rated voltage of the protected system matches. In information technology systems, this parameter indicates the type of protector that should be selected. It marks the effective value of AC or DC voltage. (2) Rated voltage Uc: The maximum effective voltage value that can be applied to the designated end of the protector for a long time without causing changes in the characteristics of the protector and activating the protective components. (3) Rated discharge current Isn: The maximum peak impulse current that the protector can withstand when a standard lightning wave with a waveform of 8/20μs is applied to the protector for 10 times. (4) Maximum discharge current Imax: The maximum peak impulse current that the protector can withstand when a standard lightning wave with a waveform of 8/20μs is applied to the protector for one impact. (5) Voltage protection level Up: the maximum value of the protector in the following tests: flashover voltage with a slope of 1KV/μs; residual voltage of the rated discharge current. 3. Read the lightning arrester test report When choosing lightning protection products, you should choose products that have passed the inspection of the lightning protection center to ensure safety performance. When choosing a manufacturer, you should pay attention to the strength of the manufacturer and try your best to choose a manufacturer with many years of experience in lightning protection to ensure after-sales support for lightning protection products. 4. Choose a lightning arrester that meets the conditions stipulated by law Nowadays, arrester manufacturers are emerging in endlessly, but many manufacturers do not have the conditions to produce arresters. Moreover, the lightning arresters have not been inspected and accepted by the lightning protection center. There are many fish on the market, and the quality and safety performance are not guaranteed. Therefore, you should pay more attention when choosing a lightning arrester.

A lightning arrester, as the name suggests, is an instrument for preventing lightning strikes. It is an electrical device that connects wires to the earth, and is often connected in parallel with the equipment to be protected. Lightning arresters can effectively and promptly protect electrical equipment. As long as there is abnormal voltage in the system, the arrester will play its role. When the protected equipment is operating under normal voltage conditions, the arrester will not function, which means it is a circuit break to the ground. However, when high voltage occurs and threatens the insulation of the protected equipment, it will be activated immediately and introduce the high voltage into the earth. This effectively limits the amplitude of the voltage and can protect electrical equipment. . Moreover, when the high voltage no longer exists, the arrester will return to its previous dormant state very quickly, allowing the system to continue normal power transmission and distribution. The arrester mainly works through parallel discharge or non-linear resistance, and then cuts the amplitude of the intruding flow wave, which can help reduce the high voltage suffered by the protected equipment. It can protect both atmospheric high voltage and operating high voltage. There are many types of lightning arresters, but each type of lightning arrester has its own advantages and characteristics, so we need to use it according to different environments to achieve good lightning protection effects.

The production of composite insulators is very simple and not as complicated as everyone imagines. The process is basically divided into: extruded sheath and adhesive umbrella disk type, segmented or one-shot injection form, single umbrella set bonding and There are three major types: flower set, Baohua plus vertical glue filling type. 1. Extruded sheath and adhesive umbrella disc type: After the mandrel is roughened and brushed with adhesive, it is made into a sheath by an extrusion machine. After secondary vulcanization, the vulcanized umbrella pieces are flashed at room temperature in the umbrella threading machine. Vulcanized silicone rubber bonding, completed after end connection fittings and sealing treatment. This technology has high production efficiency. Due to the low outlet temperature of domestic extruders, the bonding of the mandrel and the sheath is mainly performed by secondary vulcanization, and the bonding surface between the loose disk and the sheath is small. 2. Segmented or one-time injection into form: After the mandrel is roughened and brushed with adhesive, it is injection molded in the mold by an injection molding machine. Insulators with high voltage levels are made by segmented injection molding, followed by secondary vulcanization and fitting sealing. The core rod and sheath of this process are thermally coupled, with good bonding effect. The internal insulation only has one layer of interface and few interfaces. It is a relatively new production technology. 3. Single umbrella set bonded and flowered sleeve Baohuajia vertical glue filling type: After the outer sheath of the mandrel is molded, it is introduced into the umbrella string bonded by room temperature vulcanized silicone rubber, and the gaps are vacuum-filled with polymer filling Glue and seal with end connecting fittings to complete the production. This technology is an early stage process with many processes and large dispersion. Its glue filling technology is difficult to ensure the fullness of mass production of voltage levels of 220KV and above. Since the core rod has deflection and the glue filling gap is small, the contact between the core rod and the inner wall of the umbrella string can easily cause half of the glue channel to be blocked, resulting in a partial lack of filling glue and an insulation defect.

The windproof fuse is mainly composed of a melt and an insulating tube (insulating base) in which the melt is installed. When used, the melt is connected in series to the protected circuit. When a short-circuit fault occurs in the circuit, the melt is instantly blown and the circuit is disconnected, thus playing a protective role. (1) Plug-in fuse Often used at the end of lines with voltage levels of 380V and below, as short-circuit protection for distribution branches or electrical equipment. (2) Spiral fuse There is a fuse indicator on the upper end cap of the melt. Once the melt melts, the indicator pops up immediately and can be observed through the glass hole on the porcelain cap. It is often used in electrical control equipment of machine tools. Screw type fuse. The breaking current is large and can be used for short circuit protection in circuits with voltage levels of 500V and below and current levels of 200A and below. (3) Closed fuse Enclosed fuses are divided into two types: filled fuses and unfilled fuses, as shown in Figure 3 and Figure 4. Filled fuses generally use square porcelain tubes filled with quartz sand and melt. They have strong breaking capacity and are used in circuits with voltage levels below 500V and current levels below 1KA. The filler-free sealed fuse packs the melt into a sealed cylinder and has a slightly smaller breaking capacity. It is used in power grids or distribution equipment below 500V and below 600A. (4) Quick fuse It is mainly used for short-circuit protection of semiconductor rectifier components or rectifier devices. Because the overload capacity of semiconductor components is very low. It can only withstand a large overload current in a very short time, so the short circuit protection is required to have the ability to blow quickly. The structure of the quick-acting fuse is basically the same as that of the filled sealed fuse, but the melt material and shape are different. It is a variable-section melt with a V-shaped deep groove punched from a silver sheet. (5) Resettable fuse Using metallic sodium as the melt, it has high conductivity at room temperature. When a short-circuit fault occurs in the circuit, the short-circuit current generates high temperature, causing the sodium to quickly vaporize, and the vaporized sodium presents a high-resistance state, thereby limiting the short-circuit current. When the short-circuit current disappears and the temperature drops, metallic sodium returns to its original good conductive properties. Resettable fuses can only limit short-circuit current and cannot actually break the circuit. The advantage is that there is no need to replace the melt and it can be reused. When working, the fuse is connected in series in the protected circuit. When a short circuit or severe overload occurs in the circuit, the fuse link in the fuse will automatically blow to protect the circuit. The most common one is a fuse.

What are the advantages of composite insulators? Composite insulators are different from traditional porcelain or glass insulators in terms of structure and materials, and their performance is also different from porcelain or glass insulators. They are summarized as follows: (1) The axial tensile strength of the fiberglass core rod used in composite insulators is very high, generally above 600 MPa, which is 5 to 10 times that of porcelain and equivalent to high-quality carbon steel. In addition, the ratio of the core rod material is only 2.0, which is much lighter than steel; the ratio of the shed material is also less than 2.0. Therefore, composite insulators can easily produce strength levels with specified mechanical loads of hundreds of kilonewtons, and their mass is only 10% to 15% of that of disk-shaped suspension insulators. In mountainous construction and accident repairs, synthetic insulation is light in weight and not afraid of damage, so it is very popular among operation and construction personnel. (2) Composite insulators have a rod-shaped insulator structure, and the distance between the inner and outer poles is almost equal. Generally, internal insulation breakdown does not occur, and there is no need to detect zero values. (3) The composite insulating shed sheath material is an organic polymer material with a low surface and strong hydrophobicity. The water on the surface of the skirt condenses into many small water droplets that are separated from each other, and does not form a continuous water film conductive layer. The leakage current is small, it is difficult to form a local arc, and it is difficult to cause pollution along the surface. In addition, due to the high strength of the core rod, the rod diameter and umbrella diameter of the suspension insulator are much smaller than those of the porcelain insulator string, and the shape coefficient is large. Under the same dirt and the same surface conductivity, its surface resistance is higher than that of porcelain insulator strings with small shape coefficients. The pollution lightning voltage of insulators is directly related to the surface resistance. When the surface resistance is large and the leakage current is small, the corresponding pollution lightning voltage is the highest. Laboratory test results and operating experience confirm that composite insulators have high flash performance and flash accidents rarely occur. (4) Easy operation and maintenance. The pollution flashover performance is high, and there is no need to clean up pollution or detect zero values. Currently, composite insulators under various voltage levels in China do not undergo traditional and heavy cleaning and zeroing maintenance work, which greatly reduces the maintenance workload.

Installation steps of lightning arrester: The installation position of the valve type arrester should be as close as possible to the protection equipment. In principle, the electrical distance between the two should be as close as possible so that the protected equipment can be effectively protected. Generally, it should not be greater than 5ma. For lightning arresters installed on the transformer platform, it is best to connect the upper lead (power cord) to the lower end of the drop-out fuse. When the drop-out fuse is closed, the arrester and transformer are put into operation at the same time; after the drop-out fuse is pulled open, they stop operating at the same time, which prevents the arrester from being frequently exposed to power frequency voltage or operating overvoltage. The arrester must be installed vertically, and the inclination should not be greater than]50. There should be enough space around the arrester, and the distance between the live part and adjacent conductors or metal structures should not be less than 1. .35m, the distance between the .35 base and the ground shall not be less than 2.5m to prevent surrounding objects from interfering with the potential distribution of the arrester and reducing the gap discharge voltage. The upper and lower leads of the arrester should be as short and straight as possible, no joints are allowed in the middle, and the connections should be secure. The length of its joints with busbars and conductors should not be less than 100mm. To prevent loosening, it is best to tighten with spring washers or double nuts. The leads should not be too loose or tight, and no joints are allowed. The cross-section of copper wire shall not be less than 16mm, and the cross-section of aluminum wire shall not be less than 25mm. The arrester base should be well insulated from the ground, and the ground down conductor should be reliably connected to the metal shell of the protected equipment and connected to the main grounding device.

The first is a square grounding module 500*400*60mm, the second is a cylindrical grounding module φ150*800mm; the third is a plum blossom type grounding module φ150*800mm. Of course, we can also provide square grounding modules in 500*400*60mm specifications, cylindrical grounding modules and plum blossom-shaped grounding modules in φ2000*800mm and φ260*800mm specifications. As long as you have the need for grounding modules and require lightning protection equipment, they can be customized. The grounding module is a very efficient grounding device often used in lightning protection projects. It is made of non-metallic high conductive materials with built-in hot-dip galvanized flat steel and copper-clad steel. The grounding module has stable performance, low resistivity, and other features. It has the characteristics of long service life, simple construction and convenient installation. Compared with traditional lightning protection equipment, the grounding module has a larger contact area with the soil, is not easily degraded, and is corrosion-resistant, so it should be used in thunderstorm areas. Used together with resistance reducing agents, the resistivity of the soil can be better improved.

Composite insulators have the advantages of good anti-fouling performance, light weight, and strong resistance to human damage, and are increasingly popular among users. As an insulator, there should be two basic requirements, namely external insulation and stable mechanical properties. Both are equally important and one is indispensable. Therefore, studying the mechanical properties of composite insulators is an important part of our further expansion of the composite insulator market. The outer insulation of the composite insulator is provided by silicone rubber, and its mechanical load is mainly provided by the internal fiberglass tie rods, which also involves the connection between the hardware and the fiberglass tie rods. Therefore, studying and analyzing the mechanical properties of composite insulators is the key to safe operation. Composite insulators mainly rely on unidirectional glass fiber reinforced resin tie rods (commonly known as core rods) to withstand mechanical loads. The outstanding performance characteristics of FRP tie rods are high tensile strength and specific strength. The glass fibers in the pull rod are arranged in the positive direction along the axial stress direction, giving it a very high axial tensile strength, which can generally reach more than 1000 MPa. Therefore, the tensile failure strength of a pull rod with a diameter of only 18 mm can reach 250 kN. above. Since the density of pull rods is generally only 2.0 g/cm3, its specific strength (ratio of tensile strength to weight) is 5 to 6 times that of high-quality carbon structural steel. The high strength and high specific strength characteristics of the tie rod are the basis for the light weight, high strength and thin rod diameter of the composite insulator. Although composite insulators completely rely on fiberglass tie rods to bear mechanical loads, the strength of the core rod is not equal to the strength of the composite insulator, because the core rod transmits the load through the end attachment of the insulator in order to be connected to the towers and conductors of the transmission line. Different connection structures will also lead to different degrees of stress concentration, but the end joint must be the place where mechanical stress is concentrated. Therefore, the mechanical strength of a composite insulator actually depends more on the mechanical strength of the core rod than on the mechanical strength of its end joints, That is, the utilization strength of the mandrel. Composite insulators with the same core rod but different connection structures have different mechanical strengths, so the utilization strength of the core rod is also different. Composite insulator products are composed of fiberglass epoxy tie rods, silicone rubber sheds and hardware. The silicone rubber sheds use integral injection and pressurization technology to solve the key issue of interface electrical breakdown that affects the reliability of composite insulators. The connection between the glass tie rod and the hardware is made by advanced crimping workers equipped with an automatic sonic flaw detection system. It has high strength, beautiful appearance, small size and light weight. Hardware can be galvanized to prevent corrosion and used interchangeably with porcelain insulators.

The wind farm-specific isolating switch + fuse combination is an outdoor high-voltage protection appliance with a drop breaking function. It is suitable for wind farms and power stations as an essential product for protection segmentation. It is installed on the high-voltage side of distribution transformers or branch lines of distribution lines for overload and short-circuit protection of transmission lines and power transformers and for breaking and closing rated load currents. It has simple operation and convenient maintenance. Effectively solve trouble-free drops. This product improvement is mainly aimed at factors such as failure-free falls and unstable operation in wind farms. The isolation switch function is improved on the fuse body, and the protection function of the fuse is retained, with the functions of opening short-circuit current and fault current. Conditions for use of windproof fuses Ambient temperature: -45℃~55℃; The altitude does not exceed 3000m; The wind speed is not greater than 50m/s; The earthquake intensity does not exceed 8 degrees; Fuses are not suitable for use in the following places: places with the risk of burning or explosion; This product is a plateau type, anti-fouling type product

The grounding module is a grounding body made of carbon material as the main body. It is composed of non-metallic minerals with good conductivity and stability. The main material of the grounding module has a similar physical structure to the soil and can be integrated with the soil. The effective contact area between the ground body and the soil is many times larger than that of the metal ground body, which increases the effective dispersion area of the ground body and greatly reduces the contact resistance between the ground body and the soil. Therefore, it can significantly improve the grounding efficiency and reduce the ground network. Land area occupied. Performance characteristics of grounding modules 1. Chemically stable non-metallic conductor materials are used as the conductive medium of the module, and its conductivity is not affected by seasons; 2. It can absorb moisture and retain moisture, maintain effective contact with the soil, and has low grounding resistance; 3. In areas with high soil resistivity, it can effectively reduce the grounding resistance of the ground network; 4. Resistant to high power frequency and impact current, with stable resistance; 5. Corrosion-resistant, non-toxic, long service life and easy to install. Application of ground module 1. Working grounding, safety grounding and Lightning protection and grounding. 2. Working grounding and protective grounding of valuable precision instruments, computer room equipment, postal and telecommunications program-controlled equipment, radio and television equipment, electronic medical equipment, etc. 3. Lightning protection and grounding for various high-rise buildings and tall structures, historic buildings, tall memorial towers, etc. 4. Oil transportation pipelines, oil and gas tanks, and flammable and explosive material warehouses should be lightning protected and grounded.