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Shanghai Yinxi Electrical Equipment Manufacturing Co., Ltd. is a comprehensive power supply company integrating scientific research, manufacturing, sales and product maintenance. The company has strong technical development force and testing and experimental equipment, adheres to the guidance of science and technology, strong technology as the backing, actively introduces foreign advanced technology, constantly improves and perfects the products, and has many years of professional management Strengthen the control of raw material quality and process to ensure the stability of product quality. The company's transformer, voltage regulator, voltage regulator, reactor, inverter power supply, frequency conversion power supply products sell well all over the country, and are well received by the majority of users. The company has always carried out the quality policy of "technological innovation, quality improvement and integrity-based", with the business philosophy of "seeking truth, innovation and development", combined with modern science and technology, and constantly drawing on management experience, the company strives to make every transformer out of the factory become a high-quality product and improve the comprehensive management level of the enterprise. Quality is the basis for the survival of an enterprise. Yinxi people will look at the quality of products from the perspective of users, constantly improve and develop products that are satisfactory to users and affordable in price. We will constantly enrich ourselves. With the spirit of "science, dedication, innovation and pragmatism" and the concept of "science and technology, creating the future", we will forge ahead and stride forward into the new century.
Shanghai Yinxi Electrical Equipment Manufacturing Co., Ltd
Tehengwang Industrial Equipment(Wuhan) Co. Ltd

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 High power compensated voltage regulator
The SBW and DBW series single and three-phase automatic compensation voltage regulators are designed to stabilize AC voltage by introducing and absorbing advanced technology from Western Europe. When the external power supply network voltage fluctuations or load changes caused by voltage fluctuations, it can automatically maintain the stability of the output voltage. Compared with other types of voltage regulators, this series of products have the advantages of large capacity, high efficiency, no waveform distortion, stable voltage regulation, etc. it is suitable for a wide range of loads, can withstand instantaneous overload, can work continuously for a long time, manual / automatic switching, with over-voltage, over-current phase loss, phase sequence protection and mechanical fault automatic protection, as well as small volume and light weight. Easy to use and install, reliable operation and so on. Application occasion application occasions can be widely used in large mechanical and electrical equipment, production line, construction engineering equipment, elevator, medical equipment, embroidery textile equipment, air conditioning, radio and television, household appliances, lighting and other places in the field of industry, agriculture, transportation, post and telecommunications, military, railway, scientific research and culture, etc. SBW and DBW series voltage regulators should be used indoors. The normal operating conditions are as follows: 1. Ambient temperature: - 15 ~ 40 ℃; 2. Altitude: < 1000m3; relative humidity: < 90%. 4. No gas, steam, chemical deposition, dust, dirt and other media that seriously affect the voltage stabilizer insulation; 5. Explosion and corrosive media. 6. There is no serious vibration or turbulence in the installation site. Main technical parameters input voltage: single phase 220 V ± 20% or 220 V ± 30% (to be specified when ordering) three phase (three-phase four wire) 380V ± 20% or 380 ± 30% (to be specified when ordering) output voltage: single-phase 220 V, Three phase (three-phase four wire) line voltage 380V or phase voltage 220V, output voltage accuracy: (2-5%) adjustable, factory set as 3% frequency: 50-60 Hz efficiency Rate: ≥ 95% (power level above 50KVA) response time: ≤ 1.5s (when the external voltage changes by 10%, waveform distortion: no additional waveform distortion protection function: with over-voltage, over-current, lack of phase, phase sequence protection (single-phase and three-phase below 150KVA without phase loss and phase sequence protection) and Mechanical fault protection, commercial power function: three-phase products, convenient switching of voltage stability (single-phase without this function) overload capacity : twice the rated current, maintain for 1 minute (for elevator and CT special voltage regulator) start mode: power on automatic start or manual start. Optional working mode: long term, continuous unattended operation insulation resistance: ≥ 2m Ω electrical strength: power frequency sinusoidal voltage 2000V, lasting for 1 minute, no breakdown and flashover phenomenon. Model specification phase number model specification (kVA) rated capacity (kVA) output** Current (a) outline dimension (CM) (length width width height) cabinet number weight (kg) single phase dbw-10104560 × 50 × 135 single cabinet 180dbw-15156860 × 50 × 135230dbw-20209160 × 50 × 135258dbw-252511460 × 50 × 135279dbw-30303013660 × 50 × 135290dbw-40401820 × 62 × 134330dbw-505022780 × 62 × 134338dbw-606027380 × 62 × 134354dbw-80808036490 × 68 × 162390dbw-10010010045590 × 68 × 1624141dbw-10010010045590 × 68 × 1624141dbw-10010010010045590 × 68 × 16241dbw-80808080808080808036490 × 68 × - 12012054590 × 68 150682100 × 80 × 165470dbw-180180818100 × 80 × 165491dbw-200200909100 × 80 × 165530 three-phase sbw-20203060 × 72 × 125 single cabinet 230sbw-30304560 × 72 × 125240sbw-50507660 × 72 × 125287sbw-60609160 × 72 × 125301sbw-808012165 × 82 × 134379sbw-10010015265 × 82 × 1344144bw-12012012018265 × 82 × 134435sbw-15015015022790 × 77 × 1625757577272125287sbw-60609160 × 72 × 1253012012012012018265 × 82 × 134435sbw-15015015022790 × 77 × 16257571625716257575757575757577272727sbw-18018027390 × 77 × 162600sbw-20020030390 × 77 × 162610sbw-225225341100 × 80 × 165705sbw-250250379100 × 80 × 165728sbw-300300455110 × 90 × 185890sbw-320320485110 × 90 × 185915sbw-350350530110 × 90 × 185940sbw-400400606110 × 110 × 1851020sbw-450450681110 × 110 × 1851063 sbw-50050075890 × 100 × 185185 double cabinet 1350sbw-60060090990 × 100 × 1851390
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 Rectifier transformer
Dear customers, welcome to our company website, our products are directly produced by our company, and the input and output voltage of transformers can be customized according to customer requirements. The input and output voltages of some conventional transformers in our company are listed as follows, please refer to them, if you have any questions, please call our company, thank you! Tel: 021-52668758 input voltage: 12V 24 V 36V 110V 120V 127V 200V 220V 230V 240V 270V 380V 415V 440V 460V 480v 600V 660V 690V 1140V (special voltage can be customized) output voltage: 12V 24V 36V 110V 120V 127V 200V 220V 230V 240V 270V 380V 440V 460V 480v 600V Technical parameters of 660V 690V 1140V (special voltage can be customized) three phase rectifier transformer technical parameters three phase dry rectifier transformer product overview: ZSG series three-phase dry type rectifier transformer is an important part of rectifier equipment (belongs to dry-type transformer), it and various rectifying devices constitute the rectification circuit system. In order to convert alternating current into direct current, the rectifier transformer first transforms the voltage of the AC power grid into a voltage of a certain size and number of phases, and then outputs it to the DC drive equipment through the rectifier device (rectifier). Three phase dry type rectifier transformer -- Application: rectifier transformer is the power transformer for rectifier equipment. Its task is to convert AC into voltage of certain size and phase number, and then rectifier through rectifier elements to meet the requirements of DC output. In addition, the rectifier transformer has the following functions: isolate the rectifier equipment from the circuit of the power grid, ensure the safety of the equipment and personnel, limit the short-circuit current, reduce the electromagnetic interference between the rectifier equipment to the power grid or other parallel operation rectifier equipment, and inhibit the current rise rate of thyristor and other rectifier elements. For many years, our company has used high-quality materials and advanced technology to produce. It has the advantages of moisture-proof and convenient maintenance. It can go deep into the load center. The three-phase rectifier transformer is mainly used for AC 50-60Hz. It is widely used in electrochemical (electrolysis), frequency conversion, traction, DC power transmission, electroplating, spraying, electrical processing, charging, excitation, transmission, experimental equipment, lighting, machine tools Electrical appliances, medical equipment, mechanical and electronic equipment, rectifying device, electrostatic precipitator and general industrial rectifier power supply and other industries, product performance can meet various special requirements of users. Three phase dry type rectifier transformer -- performance characteristics: stable gas performance: the product combines the load characteristics, grid voltage fluctuation and atmospheric overvoltage, and determines the reasonable and reliable insulation level and insulation model according to the load condition of the rectifier transformer, and confiscates it to ensure the reliability and stability of the electric gas performance of the product. The environmental safety factor of the product is ≥ 1.67. High dynamic stability: the winding has high mechanical strength and strong anti burst ability to meet the extremely harsh load environment. The abnormal magnetic leakage may be eliminated in the process of normal manufacture. The product has high dynamic stability. High resistance, 30% higher than that of power transformer with the same capacity to suppress di / dt and effectively protect rectifier elements. Good thermal stability: advanced product design, strict control of the product's heating position and * hot spot temperature rise, coil and lead wire using copper wire, low current density. Strong overload capacity: the product has strong overload capacity and overvoltage capacity. The product design and manufacturing fully consider the load characteristics and meet the overload requirements from the aspects of temperature rise, insulation performance and accessories selection. The power saving effect is obvious and the noise is low (< 65dB). The structure is simple and beautiful. Three phase dry-type rectifier transformer: operating environment: ambient air temperature and altitude: the upper limit of ambient air temperature shall not exceed + 40 ℃, the average value of ambient air temperature for 24h shall not exceed + 30 ℃, the lower limit of ambient air temperature shall not be less than - 5 ℃, the altitude of installation site shall not exceed 1000m, and shall be installed in the place without severe vibration and impact vibration. Pollution level of atmospheric conditions: the relative humidity of the atmosphere is not more than 50% when the ambient air temperature is + 40 ℃, and it can have higher relative humidity at a lower temperature. The monthly average * * relative humidity is 90%, and the monthly average * * temperature is + 25 ℃, considering the condensation on the surface of the product due to temperature change; the pollution level is grade III; power supply voltage: the allowable deviation of power supply voltage is ± 5% No gas vapor, chemical deposition, dust, dirt and other explosive and corrosive media that seriously affect the insulation of the transformer shall be found in the installation site. Any special use conditions that do not conform to the above provisions shall be confirmed through negotiation between the user and our factory. Precautions: 1) before purchasing, estimate the total capacity of the electrical appliances you use, and select the transformer with corresponding capacity to ensure that the transformer will not be burnt out when starting instantaneously; 2) carefully check whether the parameters marked on the name plate meet your requirements before installation, and confirm that there is no error It is a normal phenomenon that the iron core and coil of the transformer will heat (but the temperature rise is not more than 80 ℃) after power on. If the temperature rise exceeds 80 ℃ or smoke, the power supply should be cut off and the capacity of the electrical appliances should be rechecked; 4) when using, please pay attention to maintenance to protect the service life of the transformer; 5) avoid collision during transportation It's not damp. Product standard JB / T 8636-1997 JB / T 2931-1999gb 6450-1986 GB / t18494.1-2001gb/t 10228-1997 JB / T 3924-1999
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  •  Development of calculation program for dynamic force and vibration of transformer

    Development of calculation program for dynamic force and vibration of transformer

    The natural oscillation frequency of winding largely depends on the degree of compaction after the equipment is installed, because the elastic coefficient of insulation is related to this. The tighter the pressure is, the higher the natural oscillation frequency of the winding will be. Therefore, increasing the compression force may increase or decrease the dynamic force, which is related to whether the natural frequency is close to or far away from the forced oscillation frequency.            Up to now, the operation practice at home and abroad has proved that the dynamic stability damage caused by short circuit of transformer has certain relationship with the calculation of electric force and verification strength according to the static method in design. It may also be because of this reason that the research on dynamic force calculation method and vibration calculation of transformer has been promoted, and it is still in continuous development. At present, in the design of small and medium-sized transformers, the static force is still used to calculate the electric force and to check the strength, but this problem is not big. For the design of large capacity transformers, some transformer manufacturers have imported programs based on dynamic force calculation from abroad, and similar programs have been studied in China. It seems that good results have been achieved, but these are all patents. However, it also shows that our country also has good results in the calculation of dynamic force and vibration of transformer.

  •  Selection and application of power voltage regulator

    Selection and application of power voltage regulator

    The power regulator is a kind of voltage regulator which can adjust the load voltage. It can call out a variety of suitable for electrical equipment requirements of the power supply voltage. Therefore, with the development of power system, the improvement of voltage level and the increase of transmission capacity, the power regulator is widely used due to its low loss and low cost. So how do we choose the right power regulator? It is mainly determined by the following three points. 1. Voltage range: the voltage range should meet the needs of load equipment. 2. Rated capacity: the capacity of the power regulator should be higher than the total capacity of the load, especially the inductive load and capacitive load, and the impact margin should be reserved during startup, which is generally 30-40% higher than the total load capacity. For example, if it needs 40KVA capacity and it is ordinary pure resistive load, we can choose 45kVA power regulator. If it is inductive load and capacitive load, we can choose power regulator above 60KVA. 3. Rated current: the rated current of the power supply voltage regulator is the current higher than the working voltage of the load. If it is inductive load and capacitive load, 30% margin should be reserved. So how can the power regulator work? With China's economic development, the demand for resources will continue to increase. Rational use of resources, avoid waste has become an indispensable part of our life. This is more important for enterprises. Many enterprises may have such distress, there are many equipment power supply voltage is not consistent with the grid voltage, one by one transformer is too expensive, and these equipment is not often used, with the transformer not only not often used, but also often maintenance, feel particularly wasteful. With such distress, it is advisable to choose a power regulator to solve this series of problems, because the power regulator has this magical function, because its characteristics "voltage regulation" can meet the needs of different power supply voltage equipment. Moreover, it is easy to move and maintain. It can be used in many ways. It is a good choice to avoid waste.

  •  Working principle and wiring method of three phase transformer

    Working principle and wiring method of three phase transformer

    The three-phase dry-type transformer is a combination of three single-phase transformers with the same capacity. It has three core pillars, each of which is surrounded by two coils of the same phase, one of which is a high-voltage coil, The other is low-voltage coil. The three-phase dry-type transformer is commonly used in power industry. Transformer connection and connection group: the high-voltage winding used in domestic transformer is generally connected to Y-connection, and the connection method of medium voltage winding and low-voltage winding depends on the system situation. The so-called system condition refers to the relationship between the voltage phasor of high-voltage transmission system and that of medium voltage or low-voltage transmission system. If the low-voltage distribution system, it can be determined according to the standard. The voltage phasors of 500, 330, 220 and 110 kV transmission systems in China are all in the same phase. Therefore, for three-phase three winding or three-phase autotransformer with the following voltage ratio, the high-voltage and medium voltage windings should be star connected. When the three-phase three core column core structure is adopted, star connection or angle connection method can also be adopted for low-voltage winding, which depends on whether the voltage phasor of low-voltage transmission system is in the same phase or lags behind the voltage phasor of medium voltage and high-voltage transmission system. 500 / 220 / lvkv-yn, yn0, yn0 or YN, yn0, D11, 220 / 110 / lvkv-yn, yn0, yn0 or YN, yn0, D11, 330 / 220 / lvkv-yn, yn0, yn0 or YN, yn0, D11 330 / 110 / lvkv-yn, yn0, yn0 or YN, yn0, D11 330 / 110 / lvkv-yn, yn0, yn0 or YN, yn0, D11 there are two different phase angles in the voltage of 60 kV and 35kV Transmission Systems in China. If 220 / 60kV transformer adopts YNd11 connection method, and 220 / 69 / 10kV transformer uses YN, yn0, D11 connection method, the difference between these two 60kV transmission systems is 30 & deg; electrical angle. When the 220 / 110 / 35kV transformer adopts YN, yn0, D11 connection method, and the 110 / 35 / 10kV transformer adopts YN, yn0, D11 connection method, the voltage phasor difference between the above two 35kV Transmission systems is 30 & deg; electrical angle. Therefore, it is necessary to be careful when deciding the connection of 60 kV and 35 kV windings, which must meet the requirements of voltage phasor of transmission system. According to the relative relationship of voltage phasor, the connection method of 60 kV and 35 kV winding is determined. Otherwise, even if the capacity and voltage ratio are right, the transformer can not be used and the connection method is wrong, and the transformer can not be connected with the transmission system. There are also two types of power transmission system, i.e. 0.4kV and 10.6kv. In Shanghai, there is a voltage phasor difference of 60 DEG; between 10kV and 110kV transmission system. In this case, three-phase three winding power transformer with 110 / 35 / 10KV voltage ratio and YN, yn0, Y10 connection method can be used, but only three-phase three core column core is used. However, it should be noted that when the single-phase transformer is connected into three-phase group connection method, the three-phase group with yny0 connection method cannot be used. The yny0 connection method can not be used for the three-phase shell type transformer. When the three-phase five column core transformer must adopt YN, yn0, yn0 connection method, there should be a fourth winding connected in the transformer with angular connection, and its outlet is not led out (the lead-out head is not in this case when electrical test is required in structure). When the transformers of different connection groups operate in parallel, the general rule is that the label of the connection group must be the same. When distribution transformer is used in lightning area, yzn11 connection method can be used. When Z connection method is used, impedance voltage algorithm is different from Yyn0 connection method, and the copper consumption of z-connection winding is more. The lightning protection performance of yzn11 connected distribution transformer is better. The yny0 connection method can not be used when the three-phase transformer adopts four coil core frames. All of the above are used for the connection of domestic transformers. For example, appropriate connection method and connection group label shall be provided according to the requirements when exporting. Generally, there are taps connected with tap changer in high voltage winding. Therefore, when selecting tap changer (including on load tap changer and off load tap changer), it is necessary to pay attention to the matching of transformer connection and tap changer connection (including connection method, test voltage, rated current, voltage of each stage, voltage regulation range, etc.). For on load tap changer used in on load tap changer with yn connection, the neutral point must be able to lead out.

  •  The step-up transformer used in tunnel can solve the problem of large voltage drop due to the far line.

    The step-up transformer used in tunnel can solve the problem of large voltage drop due to the far line.

    >Overview (step-up transformer manufacturer) SG series three-phase step-up transformer is a new generation of energy-saving power transformer developed and produced by our factory on the basis of reference to similar international products and China's national conditions. From 300VA to 1600KVA, it conforms to international and national standards such as iec439 and gb5226, and the winding adopts the method of whole train winding without tire; The insulation grade of the transformer reaches f or H level by vacuum impregnation, and the product performance reaches the advanced level at home and abroad. SG series three-phase step-up transformer is widely used in the circuit with AC frequency from 50 Hz to 60 Hz and voltage below 660V. It is widely used in import of important equipment, precision machine tools, mechanical and electronic equipment, medical equipment, rectification device, lighting, etc. All kinds of input and output voltage, connection group, number and position of regulating tap (generally ± 5%), distribution of winding capacity, configuration of secondary single-phase winding, application of rectifier circuit, and whether enclosure is required can be designed and manufactured according to the requirements of users. However, if the product is used for a long time, the total power shall not exceed 80% of the rated capacity. Product features: the common mode interference and other midlines in the power grid can be relieved by establishing a new neutral line grounding in the step-up isolation transformer. The step-up isolation transformer transforms the three line delta connection into a four wire yo system, and the shielding further eliminates the high-frequency impulse interference and noise coupled by the transformer. Although the shielded isolation transformer has the interference (pulse and high frequency) from various N-G sources Noise) can be effectively prevented, but the transformer must be properly grounded, very strict, otherwise anti common mode interference will not be effective. Our company can design and produce high quality isolation transformer for customers. Features and advantages: high isolation, good N-G performance, high common mode interference suppression, easy conversion of △ to y or y to △ voltage tap, easy conversion Ø design technical indicators according to user's special performance requirements 1. Input rated voltage: three-phase 380V or single-phase 380V, working frequency: 50hz-60hz3 efficiency: ≥ 95% 4 temperature Rise: < 605 waveform distortion: < 0.1% 6 high voltage test: 2500V, 1 minute no breakdown service condition 1 applicable altitude: ≤ 5000m2, ambient temperature: - 15 ℃ ~ + 45 ℃ 3 relative humidity: ≤ 90%. 4 the installation site should be free of gas, steam, chemical deposition, dirt, conductive dust and other explosive, flammable and corrosive substances that seriously affect the insulation strength of the transformer. If it does not meet the above conditions, it should be determined through consultation with us. SG, DG, OSG, ODG (three-phase, single-phase, auto coupling) YSD dry-type step-up transformer is a series of products designed and produced by our company to adapt to different grid systems and equipment with special requirements in various countries. It has a wide range of applications, can withstand instantaneous overload and can work continuously for a long time. >The company's product service guarantee: all products are inspected in strict accordance with the national standards before leaving the factory to ensure 100% of the factory pass rate. The company promises that all products will be guaranteed for one year! Shanghai Yinxi Electrical Equipment Manufacturing Co., Ltd. is a comprehensive power supply company integrating scientific research, production, sales and product maintenance. The company has strong strength in testing, testing and quality control. Since its inception, the company has been engaged in the production of transformers, voltage regulators, voltage regulators, switching power supplies, and distribution boxes, etc., more than 10 series, more than 100 kinds of products, products are exported to more than 50 countries and regions such as North America, Western Europe, the Middle East, North Africa and so on, which has been well received by the majority of users. After sales guarantee: 1. The company produces and sells various types of silver Xi transformers, silver voltage regulators and silver Xi voltage regulators, which can be customized according to customer requirements, sizes and specifications. 2. The quality guarantee period of dry-type transformer, voltage regulator, voltage regulator, reactance and complete grounding device is one year. 3. In case of any product quality problem during the warranty period, our company is responsible for free repair or replacement. 4. The company has opened a national free 24-hour service hotline 021-52668758, and will reply to the handling opinions within 8 hours after receiving the complaint, and according to the user's requirements, it can be divided into 24 hours to handle, 48 hours to handle, and the time agreed with the user. 5. Due to the power failure caused by product accidents, our company promises that within 24 hours in developed traffic areas, the company has: AC on-off test, AC life test, reliability test, flashover and breakdown test, comprehensive characteristic test, high and low temperature and high temperature resistance test, alternating and constant damp heat test, ball voltage test, leakage and aging test, drop and vibration test, ultrasonic imaging Non destructive testing, plastic mechanical property test, plastic flame retardant and electrical performance test, carbon and sulfur analysis test, silicon steel sheet iron loss test, chemical analysis test, step-up transformer dry-type step-up transformer 220 V step-up transformer manufacturer step-up transformer manufacturer professional production of various types of transformers: isolation transformer, three-phase isolation transformer, single-phase transformer Phase isolation transformer, dry isolation transformer, three-phase dry isolation transformer, high-power transformer, 10-1000kva transformer. Oil immersed induction voltage regulator, three-phase voltage regulator, induction voltage regulator, single-phase oil immersed voltage regulator, oil immersed self cooling induction voltage regulator, induction automatic voltage regulator, voltage regulator. Contactless regulator, compensation regulator, high-power regulator, 380V high-power regulator, automatic compensation power regulator, three-phase compensation power regulator, transformer.  

  •  With the development of science and technology, transformer technology is rising

    With the development of science and technology, transformer technology is rising

    In recent years, China has been vigorously building infrastructure, which of course also includes the construction of large-scale thermal power, hydropower and wind energy bases, so that the production of power transmission and transformation equipment is increasing day by day, with a bright future. As the main equipment of power transmission and transformation system, transformer manufacturers and transformer traders have sprung up and developed rapidly under the good situation of the industry. This makes the competition intensified, coupled with the rising prices of silicon steel sheet and other raw materials, some people have a crooked mind when the factory is difficult to operate or even facing closure. Therefore, there are many fake and inferior transformer products with inferior quality and fake without authenticity. The emergence of this phenomenon makes the transformer market which is already fierce competition more strict Now, with the continuous development of society and economic prosperity, the original transformer function and many other aspects have been unable to adapt to the development of society. The transformer must constantly innovate technology, so as to adapt to the needs of society and the development of various fields, and the transformer will have a good market environment. In this case, to improve the technology of transformer is the way out. Only by constantly improving the technology can we improve the competitiveness. Therefore, the transformer manufacturers should vigorously study the technology of transformer. The development of transformer manufacturing technology mainly combines the characteristics of new products and new structures, and focuses on the development and Application of new materials and new equipment To continuously improve the quality and reliability of products, in performance, structure and other aspects of technical breakthroughs and innovation, so as to meet the needs of various fields. We should make continuous innovation in transformer technology, break through the previous technical difficulties, and adapt to the development of society.

  •  Voltage regulator solves the problem of voltage instability

    Voltage regulator solves the problem of voltage instability

    Voltage regulator is essential for stable voltage class of electrical equipment, which also urges us to develop more advanced voltage regulator to meet the needs of equipment.   Let's understand how important the voltage regulator is: the function of the voltage regulator is to stabilize the voltage, and the unstable voltage will cause delay in the production of the equipment, delay in the delivery date, and the difference in the production quality and other aspects of the economy or reputation loss, and even fatal injury; at the same time, it also accelerates the aging of the equipment, which will affect the service life of the equipment and even the matching If it is damaged, it will face the trouble of maintenance or equipment renewal in a short period of time; if it is serious, it may cause safety accidents and cause huge losses.

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