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Bare wires Bare wires and bare conductor products refer to conductive wires without insulation and sheath, mainly including bare single wire, bare stranded wire and profiled wire. Copper aluminum single wire: including soft copper single wire, hard copper single wire, soft aluminum single wire and hard aluminum single wire. It is mainly used as semi-finished products of various wires and cables, and a small amount is used in the manufacturing of communication wires and electrical appliances. Bare stranded wire: including hard copper stranded wire (TJ), hard aluminum stranded wire (LJ), aluminum alloy stranded wire (LHAJ), and steel core aluminum stranded wire (LGJ) are mainly used for the connection of electrical equipment and electronic appliances or components. The specifications of the above various stranded wires vary from 1.0-300mm2. The following cable types can meet the needs of different customers: flat cables,Copper core cable,Armored cable,high voltage power cable,3 core Cables

Single-phase to 3 phase power converter is applicable to various types of loads (such as motor, ice cream machine, lathe, mixer, elevator, commissioning converter, compressor, etc.). Single-phase 220V to three-phase 380V power converter uses AC-DC-AC circuit structure and SPWM modulation control technology to convert ordinary single-phase power to industrial three-phase power. The three-phase power after single-phase to three-phase power conversion is standard sine wave, with phase angle of 120 ° and harmonic distortion rate less than 2%, which fully meets the three-phase power quality standard and is applicable to various types of loads. Single-phase to three-phase power supply solves the inconvenience caused by three-phase power restriction in some areas, and also solves the user demand that cannot apply for three-phase power due to site restrictions. Three-phase three-wire three-phase four-wire (with neutral line) three-phase five-wire system can be selected according to the needs of user equipment. power converter Transformers,Single phase to 3 phase power converter, 220V to 380V converters,voltage converter 220v to 110v,220 to 110 voltage converter

The iron core and winding are immersed in the oil tank filled with transformer oil, and the end points of each winding are led to the outside of the oil tank through insulating bushings, so as to connect with the external lines. Therefore,Oil immersed power transformer is mainly composed of five parts: 1. iron core; 2. Winding with insulation; 3. Transformer oil; 4. Oil tank; 5. Insulating sleeve. Iron core: The iron core of the transformer is the magnetic circuit of the transformer. Since the magnetic flux in the transformer core is an alternating magnetic flux, in order to reduce eddy current loss, the transformer core is laminated with electrical steel sheets. Winding: according to the arrangement method of windings in the iron core, transformers can be divided into iron core type and iron shell type. The basic types of transformer windings are the same core type and overlapping type. The iron core type transformer is commonly used with the same core type winding, and the iron shell type transformer is commonly used with the overlapping type winding. Transformer oil: transformer oil has dual functions: 1. It can enhance insulation; 2. Heat is generated in the iron core and winding due to loss. The heat is transferred to the surface of the iron box through the convection of oil after heating, and then spread around the iron box surface. Oil tank: the purpose of oil tank is to reduce the contact area between oil and air, so as to reduce the oxidation rate of oil and the water intrusion into the transformer; Insulating sleeve: the insulating sleeve is composed of central conductive copper rod, porcelain bushing, Transformer Accessories,Transformer Breather,Pointer Oil Level Gauge,Electric Contact Pressure Relief Valve.etc

China Tap Changer,Transformer Tap Changer manufacturer, choose the high quality Tap Changer Transformer,Off Excitation Tap Changer, etc. 1. Inspection, maintenance and commissioning of core suspension of tap changer. 2. Cleaning, leak detection and maintenance of tap changer oil chamber. 3. Inspection, cleaning, oiling and maintenance of driving mechanism 4. Inspection and maintenance of oil conservator and its accessories 5. Inspection, maintenance and calibration of oil flow control relay (or gas relay,Buchholz relay), over pressure relay and pressure relief device. 6. Inspection of automatic control device. 7. Treatment of insulating oil in oil conservator and oil chamber 8. Inspection, maintenance and commissioning of motor mechanism and other components. 9. Check the sealing of all parts and deal with oil leakage. 10. Inspection, maintenance and commissioning of electrical control circuit. 11. Connection verification and commissioning of tap changer and electric mechanism. Tap Changer,Transformer Tap Changer,Tap Changer Transformer,Off Excitation Tap Changer,On load switches

1. Lightning strike The research on lightning stroke is relatively few, because many times the impact fault will be classified as "line inrush current" if it is not a direct lightning stroke accident. Of course, the best way to prevent lightning stroke is to install lightning arrester, which can not only protect the transformer, but also reduce the impact current in the power system and reduce transient fluctuations. 2. Line inrush Line inrush current should be listed as the primary fault factor. Line inrush current (or line interference) includes switching overvoltage, voltage peak superposition, line short circuit fault, flashover and abnormal phenomena of large current and voltage in terms of vibration. The most serious reason for the damage of this kind of fault to the transformer is the excessive current and voltage. Therefore, more attention should be paid to the adequacy of large current impact protection. The installation of over-current protection monitoring device can conduct real-time measurement and detection report on the transformer. This result is sent to the whole system of power system automation operation as the index of safe operation. 3. Quality omission In general, the problems of previous transformers in this regard are not very big, but occasionally unavoidable. For example, the outgoing terminal of the wiring is loose or unsupported, the cushion block is not tight, the welding is poor, the insulation of the iron core is not high, the resistance to large current is insufficient, and the oil in the oil tank is not pure. Strengthen testing and detection to find problems as early as possible when they are not installed. 4. Insulation aging Among many oil immesserd transformer faults in the past, the fault caused by insulation aging ranked second among all faults. Due to insulation aging, most transformers have seriously shortened their service life, which is about 20 years earlier. Formulate a certain system to ensure that the aging speed reaches the rated service life. 5. Overload It is caused by overload, and the transformer operates at a power higher than the specified rated power for a long time. With the development of economy and science and technology, the power load is increasing, and power plants and power consumption departments are continuously and slowly increasing the load. It directly causes more and more transformers to operate under overload, and the excessive temperature leads to premature aging of the insulating cardboard of the transformer, which reduces the overall insulation strength. In this state, if there is a certain impact current, the probability of failure will be high. Ensure that the load is under the rated operation condition of the transformer, and do not overload the transformer for a long time. In oil cooled transformers, the top oil temperature needs to be carefully monitored frequently. If it is found that the temperature is high, it should be handled in a timely manner. 6. Be affected with damp Moisture is inevitable. Due to various external natural reasons, pipe leakage, head cover leakage, water intrusion into the oil tank along the sleeve or accessories, and water in the insulating oil are often caused. The design and construction standards of the transformer shall match with the installation site. If placed outdoors, confirm that the transformer is suitable for outdoor operation. The dielectric strength of transformer oil decreases sharply with the increase of water content. One ten thousandth of water in oil can reduce its dielectric strength by nearly half. The oil samples of all transformers (except small distribution transformers) shall be subject to breakdown tests frequently to ensure that moisture is correctly detected and removed by filtration. 7. Improper maintenance The investigation results show that the probability of transformer failure caused by improper maintenance ranks fourth. It is mainly due to insufficient maintenance, no control or incorrect installation of control devices, coolant leakage, dirt accumulation and natural electro chemical corrosion. 8. Destruction and intentional damage This kind of external damage, which is mainly considered, often occurs in the transformer directly connected to the user at the end of the line, but this kind of damage is very uncommon. 9. Loose connection The possibility of this kind of problem causing failure is also very small, and can be avoided to the greatest extent. However, in practice, this kind of accident happens from time to time, which is different from previous studies. This type of accident includes the manufacturing process and maintenance of electrical connection. The most prominent problem is the improper coordination between metals of different properties, but this situation is slowly decreasing. Another problem is the improper fastening of bolt connections. Epilogue With reference to the above statistical analysis results and some suggestions, an overall maintenance, inspection and test plan can be formulated in the future construction and operation. In this way, transformer faults can be minimized to reduce a series of adverse effects caused by transformer faults. It can also save huge manpower, financial and material resources for troubleshooting, and the service life of the transformer will also increase. Oil Immersed Transformers,high voltage Transformer,distribution transformers,distribution transformer,Medium and high voltage transformer

6-10kV indoor substation is mainly composed of three parts: high-voltage distribution room, transformer room and low-voltage distribution room. 1. High voltage distribution room When the number of units is small, single row arrangement is adopted; When there are many sets, double row arrangement is adopted. When overhead incoming and outgoing lines are used, the distance from the incoming and outgoing line casing to the outdoor ground shall not be less than 4m, and the distance from the suspension point of the incoming and outgoing lines to the ground shall generally not be less than 4.5m. The clearance height of fixed high-voltage switchgear is generally about 4.5m, and that of handcart switchgear is generally 3.5m. The layout of high-voltage distribution room is shown in Figure Layout of high-voltage distribution room (a) Single row arrangement; (b) Double row arrangement 1 - High voltage post insulator; 2 - High voltage bus; 3 - Bus bridge 2. Transformer room The transformer room is the room where the transformer is installed. The structure type of the transformer room is related to the type, capacity, placement direction, incoming and outgoing line orientation, electrical main wiring scheme, etc. of the transformer. Each transformer with oil volume of 100kg and above shall be installed in a separate transformer room. The direction of the transformer placed indoors is determined according to the design, usually There are wide area propulsion and narrow area propulsion. The low-voltage side of the transformer with wide area propulsion should be outward; The transformer conservator with narrow face propulsion should be outward. The floor of transformer room can be raised or not. The floor elevation is generally 0.8; 1.0; Three types are 1.2m, and the height of corresponding transformer room shall be increased to 4.8-5.7m. 3. Low voltage distribution room Single row arrangement or double row arrangement can be adopted according to the number of low-voltage switchgear. When the low-voltage distribution room is adjacent to the transformer room with raised floor, the height is 4~4.5m; When adjacent to the transformer room with no raised floor, the height is 3.5~4m; When the low-voltage distribution room is a cable inlet, the height is 3m. Switching stations,Reactive compensation cabinet,distribution cabinet,Control cabinet,high voltage switchgear

In 1982, the first amorphous alloy core transformer was put into operation in the United States; In 1983, Electric Power Research Institute (EPRI), GE Company and New York State Electric Power Company considered this problem, and in 1985, 1000 sets of 25 and 15 kVA pole mounted transformers were sent to 90 EPRI member units for field test for two years. The test data of the field test shows that the no-load current and no-load loss after 2 years of operation are very close to those of the delivery test. Tokyo Electric Power Company, Takao Electric Company and Hitachi Electric Company of Japan have made in-depth and detailed research on the long-term reliability of amorphous alloy transformers. Since 1991, they have conducted accelerated aging, on-site operation, short circuit, impact and other tests on 200 amorphous transformers with different capacities, and also conducted tests on the impact of load and vibration on the no-load characteristics of transformers. The results show that the no-load characteristic is stable and the operation is reliable in the 30 year service life; In 1995, China also studied this problem. As a test run unit of amorphous alloy distribution transformers, Beidao District Electric Power Bureau of Tianshui City, Gansu Province, tested 10 amorphous alloy transformers that had been connected to the grid for two months according to the requirements of the Ministry of Metallurgy and the Ministry of Electric Power on the test of key test projects. The test results were consistent with the test values before operation. The iron core material has been annealed at about 400 ℃ after being made into shaped iron core, which is high enough for normal operation temperature and short-circuit thermal stability temperature, so there is no need to worry that the material will change due to temperature within the 30 year service life. Therefore, there is no possibility that the no-load loss of amorphous alloy transformer will increase during operation. The following transformer types can meet the needs of different customers: Oil Type Distribution Transformer,Conservator Type Transformer,Electric Furnace Transformer,Electrostatic Precipitator Transformer

Transformer is a device that converts a certain level of AC voltage and current into another level of voltage and current of the same frequency according to the principle of electromagnetic induction. According to the purpose of transformer, it can be divided into power transformer, audio input transformer, output transformer, intermediate frequency transformer, high-frequency transformer, pulse transformer, etc. 1. Text symbol of transformer is "T". 2. The transformer works on the principle of mutual inductance, and has the functions of transmitting AC and isolating DC, voltage transformation, impedance transformation and phase transformation. The transformer is composed of primary and secondary coils which are not connected with each other, and the iron core or magnetic core is used as the coupling medium between them. The voltage ratio and impedance ratio can be changed by changing the ratio of turns between primary and secondary. By changing the connection of the transformer coil, the signal voltage can be easily inverted. 3. Power transformer is a kind of soft magnetic electromagnetic component, whose functions are power transmission, voltage transformation and insulation isolation. It is widely used in power supply technology and power electronics technology. The main parameters of power transformer are power, secondary voltage and current. The power is proportional to the square of the core section. The larger the iron core section is, the greater the transformer power is. The purpose of the power transformer is to transform the power supply voltage, and can simultaneously provide multiple power supply voltages to meet the needs of electronic circuits. During fabrication, transformers with satisfactory secondary voltage and current shall be selected as required. 4. Another use of power transformers is power isolation. Due to the isolation effect of the transformer, even if the human body contacts the voltage U2, it will not form a loop with the AC 220V mains power, ensuring personal safety. This is the reason why the power isolation transformer must be used when repairing the hot floor appliances. 5. Audio transformer is a transformer working in the audio range, also known as low-frequency transformer. The operating frequency range is generally from 10 to 20000 Hz. It is commonly used to convert the impedance of power supply or load. The figure shows a push-pull power amplifier circuit. The input transformer transmits and distributes the signal voltage to transistors VT1 and VT2 (the signal to VT2 is also inverted), so that VT1 and VT2 alternately amplify positive and negative half cycle signals, and then the output transformer synthesizes the signals for output. At the same time, the output transformer transforms the 8 Ω low resistance of the speaker into hundreds of ohms high resistance, matching with the output impedance of the amplifier, making the output audio power of the amplifier maximum and distortion minimum. 6. The intermediate frequency transformer is commonly referred to as the medium frequency transformer, which is a special component of superheterodyne radio. It is used in IF amplifier circuit of superheterodyne radio and TV. The intermediate frequency transformer has the function of frequency selection and coupling. In the middle amplifier circuit of superheterodyne radio, the primary coils of intermediate frequency transformers T1 and T2 resonate with C1 and C2 at 465kHz, respectively, as the load of VT1 and VT2. Therefore, only the 465kHz intermediate frequency signal is amplified, playing a role in frequency selection. Is the amplitude frequency characteristic curve of intermediate frequency transformer, f0 is the resonant frequency, Δ F is the passband. 7. High frequency transformer is usually a power transformer whose working frequency exceeds medium frequency (10kHz). It is mainly used as high-frequency switching power transformer in high-frequency switching power supply, and also used as high-frequency inverter power transformer in high-frequency inverter power supply and high-frequency inverter welding machine. The magnetic antenna of the radio is a high-frequency transformer. The primary coil and variable capacitor C form a frequency selection loop. The selected radio signal is transmitted to the high amplifier or variable frequency stage VT1 through the coupling between the primary and secondary. 8. The transformer can be tested with a multimeter. The first is to detect the on-off of winding coils, the second is to detect the insulation resistance between winding coils, and the third is to detect the insulation resistance between winding coils and iron core. Oil Immersed Transformers,high voltage Transformer,distribution transformers,distribution transformer,Medium and high voltage transformer

On November 17, teachers and students of Wuhan University of Technology visited our factory. This visit not only enabled the students of Wuhan University of Technology to have a deeper understanding of the professional knowledge of transformers and high and low voltage distribution cabinets, but also strengthened the school enterprise cooperation between our factory and Wuhan University of Technology, laying a foundation for training more professionals in the transformer and high and low voltage distribution cabinet industry. Oil Immersed Transformers,high voltage Transformer,distribution transformers,distribution transformer,Medium and high voltage transformer

On the 3rd of this month, in Henan Tongniu Transformer Co., Ltd., located in the West Industrial Zone of Luoyang City, a batch of new energy-saving transformers went offline and will be exported to Japan and Zimbabwe. The company is a small and medium-sized enterprise in Henan Province that is "specialized, refined, special and new", and has successfully developed a special transformer with independent intellectual property rights. The core performance of the medium frequency furnace transformer produced by the enterprise has reached the industry level, accounting for about 30% of the domestic market share. At present, "Luoyang made" energy-saving transformers have been exported to more than 40 countries and regions. China Conservator Type Transformer,50Kva Transformer manufacturer, choose the high quality 200Kva Transformer,33Kv Transformer, etc. Conservator Type Transformer,380v transformer,66KV Transformer,medium voltage transformer,High voltage transformer

On October 23, An Shizhu, Vice Chairman of the CPPCC Municipal Committee and Chairman of the Municipal Federation of Industry and Commerce, and others visited our factory for investigation. Chairman An investigated the production and operation, scientific and technological innovation, market share and export and foreign trade of the Group in detail, and solicited opinions and suggestions on high-quality development of manufacturing industry in private economy. Through this survey, Chairman An spoke highly of our company's product innovation and brand building, and said that he would further support the development of New Power Company. Henan New Electric Power Co.,Ltd. is a comprehensive enterprise integrating product research and development, product sales, and import and export services. It has more than 45 years of research and development experience. The company has a modern workshop of more than 120,000 square meters, a research and development center, and a staff apartment of more than 30,000 square meters. The production equipment is perfect, the testing method is perfect, the technical force is strong, and the qualification is complete. We can provide high, medium and low voltage transformers with voltages of 110KV and below and capacities of 120,000 kVA and below for various purposes, as well as tap changers, gas relays, oil level gauges, moisture absorbers, valves, thermometers, insulators, fans and other accessories . Dry Type Distribution Transformer,Non encapsulated transformer,Air Cooling Transformer,Dry Power Transformer,Dry type epoxy resin transformer

On the 30th of last month, in Henan Tongniu Transformer Co., Ltd., which is located in Luoyang Industrial Park, a large energy-saving rectifier transformer was off the line and ready to be shipped to the Qinghai Tibet Plateau. The large energy-saving transformer independently developed and manufactured by our company can operate stably in high altitude areas above 3500 meters, provide high-quality power support for ultra high-power DC smelting equipment, effectively reduce the energy consumption of rectifier units, and has excellent energy-saving performance. It has won the national invention patent. Electrostatic precipitator transformer is the main component of rectifier equipment for high-voltage electrostatic precipitator. According to the different requirements of working conditions, mechanical devices such as electrodes are selected, matched with high and low voltage electrical automatic control systems (i.e. the first part of equipment and the second part of equipment), and controlled and adjusted by them, which can be widely used in industries such as dust removal, demisting, desulfurization, dehydration, impurity separation and recovery of rare metals and other raw materials. The electrostatic precipitator transformer is mainly composed of two parts, one single-phase rectifier transformer and one bridge rectifier. When they are assembled in the same oil tank, they are called platform type, and when they are separately assembled in different oil tanks, they are called split type. There are two types of combined type: indoor type and exterior type, while there is only one type of split type: indoor type. The transformer itself is a high impedance transformer. High voltage silicon stack adopts avalanche high voltage silicon stack, which has strong impact resistance and can recover automatically after reverse breakdown. The high-voltage AC terminal of the transformer and the high-voltage silicon stack adopt the full bridge connection mode. Electrostatic precipitator transformer, silicon rectifier transformer, high-voltage electrostatic precipitator rectifier transformer, high impedance transformer

On October 20, more than 100 entrepreneurs and technical experts from China's foundry industry visited our factory for inspection and guidance. They highly affirmed and appreciated the enterprise scale, product R&D and technological innovation, and expressed their willingness to take this investigation as an opportunity to further cooperate with our company. 1. The low voltage winding of oil immersed transformer generally adopts the cylindrical structure of copper foil winding, except for the small capacity of copper wire; High voltage winding adopts multi layer cylindrical structure, which makes the distribution of ampere turn of winding balanced, with small magnetic leakage, high mechanical strength and strong short-circuit resistance. 2. The iron core and winding adopt fastening measures respectively. The fastening parts such as the height of the device and the low voltage lead are equipped with self locking locknuts. The structure without lifting the core is adopted, which can withstand the bumping during transportation. 3. The coil and iron core are vacuum dried, and the transformer oil is vacuum filtered and filled to minimize the moisture inside the transformer. 4. The oil tank adopts corrugated sheet, which has breathing function to compensate for the volume change of oil caused by temperature change, so this product has no oil conservator, obviously reducing the height of transformer. 5. Because the corrugated plate replaces the oil conservator, the transformer oil is isolated from the outside, which effectively prevents the entry of oxygen and water and leads to the decline of insulation performance. 6. According to the above five performances, the oil-immersed transformer does not need to change oil during normal operation, which greatly reduces the maintenance cost of the transformer and extends the service life of the transformer. Oil Immersed Transformers,high voltage Transformer,distribution transformers,distribution transformer,Medium and high voltage transformer

The types of transformers are divided into power transformer, distribution transformer, lower type transformer, Amorphous metal transformer and winding core transformer. A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage, and its main components are the primary coil, secondary coil, and iron core (collision core). The main functions include voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization, etc A few days ago, the book Power Electronic Converter Equipment published by China Power Press included more than 300 kinds of rectifier transformers of 72 specifications developed by our company. This inclusion represents that our factory's ability to independently develop and manufacture products is at a priority in the field of the same industry. It also demonstrates New Electric Power's comprehensive strength and position in the industry. It plays an important role in promoting the continuous improvement of technical level, enhancing the ability of independent innovation, and providing excellent energy-saving products and services for the industry and customers. The special rectifier transformer independently developed and manufactured by New Electric Power can effectively reduce the energy consumption of the rectifier unit, provide safe and stable power support for equipment in operation, and has excellent energy-saving performance. It has won the national invention patent. New Electric Power Co., Ltd., with more than 45 years of experience in manufacturing special transformers, is a member of the "China Rectifier Transformer and Electric Furnace Transformer Technical Committee" in Henan Province; Henan Enterprise Technology Center; Henan Special Transformer Engineering Technology Research Center; Henan Energy Saving Special Transformer Engineering Research Center; National high-tech enterprises; Qualified supplier of State Grid. In December 2018, the company's two leading products, rectifier transformer and furnace transformer, were selected as "China's top ten brands of rectifier transformer" and "China's top ten brands of furnace transformer". At present, the company's products have been used in scientific research institutes, military, nuclear, metallurgical, chemical, mining machinery, carbon, steel industry, power and other important national engineering fields, and exported to France, Spain, Russia, Japan, Myanmar, Thailand, Singapore, Malaysia, Zambia, Congo, North Korea, Vietnam, Laos, Cambodia, South Sudan, Ethiopia, Nigeria, Zimbabwe, Azerbaijan Cameroon and more than 30 other countries.

In order to ensure the safety, harmony and stability during the 70th anniversary celebration of the founding of New China, on the afternoon of September 26, the company carried out a large-scale training on "risk prevention, hidden danger elimination and security". New Electric Power earnestly implements the main responsibility of enterprise safety in production, constantly promotes energy conservation, emission reduction and consumption reduction, and presents gifts for the 70th anniversary of the founding of New China. 1. The low voltage winding of oil immersed transformer generally adopts the cylindrical structure of copper foil winding, except for the small capacity of copper wire; High voltage winding adopts multi layer cylindrical structure, which makes the distribution of ampere turn of winding balanced, with small magnetic leakage, high mechanical strength and strong short-circuit resistance. 2. The iron core and winding adopt fastening measures respectively. The fastening parts such as the height of the device and the low voltage lead are equipped with self locking locknuts. The structure without lifting the core is adopted, which can withstand the bumping during transportation. 3. The coil and iron core are vacuum dried, and the transformer oil is vacuum filtered and filled to minimize the moisture inside the transformer. 4. The oil tank adopts corrugated sheet, which has breathing function to compensate for the volume change of oil caused by temperature change, so this product has no oil conservator, obviously reducing the height of transformer. 5. Because the corrugated plate replaces the oil conservator, the transformer oil is isolated from the outside, which effectively prevents the entry of oxygen and water and leads to the decline of insulation performance. 6. According to the above five performances, the oil-immersed transformer does not need to change oil during normal operation, which greatly reduces the maintenance cost of the transformer and extends the service life of the transformer. Oil Immersed Transformers,high voltage Transformer,distribution transformers,distribution transformer,Medium and high voltage transformer

On July 8, a batch of high-power rectifier transformers for nuclear industry in our factory were being assembled with leads before final assembly, and were ready to be delivered to users next month. This type of special transformer independently developed and manufactured by the company can reduce the energy consumption of rectifier units, provide safe and stable power support for equipment in operation, and has excellent energy-saving performance. It has obtained the national invention patent right. Resistance furnace transformer Electric resistance furnace and salt bath furnace for heating, heat treatment of mechanical parts, powder metallurgy sintering, non-ferrous metal smelting, etc. Because the resistance of the heater is too small, or the resistance of the heater changes too much during the heating process, a resistance furnace transformer needs to be equipped between the furnace and the power grid to reduce and adjust the input voltage of the furnace. The resistance furnace transformer and salt bath furnace transformer with small capacity and low voltage are mostly dry-type transformers, with a box shell and natural cooling; Resistance furnace transformers with medium capacity (hundreds to thousands of volt amperes) are mostly oil immersed self cooling transformers; Large capacity is forced oil circulating water-cooled transformer. Electric arc furnace transformer A special transformer used to supply power to electric arc furnaces for iron and steel smelting. Large capacity, complex structure and high technical requirements. Its secondary side voltage is low, generally from tens of volts to hundreds of volts, and it is required to be adjustable in a large range; The secondary side current often reaches thousands to tens of thousands of amperes. In addition, in iron and steel smelting, large power is required during the melting period, and the transformer is required to have 20% overload capacity within 2 hours. In the process of steelmaking, electrode short circuit is easily caused by the collapse of furnace charge, so the primary side of the electric arc furnace transformer should be connected to the current limiting reactor in series or have a large impedance to limit the short circuit current. transformer for electric furnace,step down transformers,electric furnace transformer,furnace transformers, pules furnace transformers

Recently, the news that the 2020 CCTV Mid Autumn Festival Gala has been settled in Luoyang continues to wash the screen in the circle of friends! On the evening of October 1, CCTV will broadcast live all over the world! A "Moonlight Feast" will be staged to promote traditional culture and highlight Luoyang elements. The main venue of the 2020 CCTV Mid Autumn Festival Gala has selected "TNNPI Brand Dry Transformer" as the high-quality power supply, which will broadcast the gala to the world! Features of dry type transformer 1. High safety: dry-type transformer has no combustible resin, does not support combustion during use, can be flame retardant, does not explode and release toxic gases, does not cause harm to the environment, other equipment and human body, and is not sensitive to humidity, dust and pollution. There is no possibility of partial discharge and "cracking" during operation. 2. High reliability: NOMEX insulation material is selected for high and low voltage coils, and Class H solvent-free impregnating paint is impregnated by VPI vacuum pressurizing equipment for many times, and the coils are baked and cured at high temperature for many times. The product is Class H (180 ℃), while the main insulation material is Class C (220 ℃), with strong overload capacity and good short-circuit resistance. Under the condition of good ventilation, 20% overload operation is allowed. 3. Energy conservation and environmental protection: steel, iron and other materials are easy to recover after the end of product life; All NOMEX paper used will not release toxic substances when burning; Other insulating materials can be degraded without polluting the environment; Low loss and energy saving of products; Low noise, flexible design. Because dry-type transformer has no oil, there is no fire, explosion, pollution and other problems, so electrical codes and regulations do not require dry-type transformer to be placed in a separate room. The loss and noise have been reduced to a new level, creating conditions for the transformer and low-voltage panel to be placed in the same distribution room. Dry Type Transformer,Dry Electrical Transformer,Dry Type Isolation Transformer,Copper Winding Dry Transformer

On June 17, technicians carried out comprehensive maintenance for two 110KV main transformers of Henan Wanda Aluminum Co., Ltd., which had been operating for more than ten years in a row, after power failure. I wish Henan Wanda Aluminum to march forward bravely and create another brilliant future! The main transformer, which is the main step-down transformer used for power transmission and transformation in a unit or substation, is also the core part of the substation. The main transformer is composed of the following aspects: 1. Body: The body directly converts electromagnetic energy, which is composed of iron core, coil, lead wire, insulation, etc. 2. Oil tank and cover: mainly composed of box, cover, bottom and accessories (such as 50 valve, oil sample valve, oil drain plug, grounding bolt, etc.). 3. Protection device: mainly composed of oil conservator, oil meter, oil purifier, gas relay, moisture absorber, thermometer, pressure relief valve, etc. 4. Cooling mode: oil immersed self cooling, oil immersed air cooling, strong oil water cooling, strong oil air cooling. 5. Outgoing line bushing: It is composed of 25/300 cable bushing and BF-6/2000, BF-1/1000, BF - l/600 and BF-1/300 bushings. 6. 25 # or 45 # transformer oil is used as transformer oil to increase insulation strength and cool down the transformer; High Voltage Power Transformer,The main transformer,main transformer

On the morning of August 5, Xiao Hongbin, Vice Chairman of the CPPCC Municipal Committee, and other leaders visited the city for inspection and guidance. Leaders of the CPPCC Municipal Committee are listening to the report of our staff on the innovation of energy-saving and high-efficiency transformer technology and market share. The achievements of our company in scientific and technological innovation and new product research and development were affirmed through this inspection, and we expressed that we would further support the development of New Electric Power. Product introduction 1000kVA and above oil immersed transformers must be equipped with outdoor signal thermometers and can be connected to remote signals. Oil immersed transformers of 800kVA and above shall be equipped with gas relay and pressure protection device. Oil immersed transformers of 800kVA and below can also be equipped with gas relay according to the use requirements and through consultation with the manufacturer. Dry type transformers shall be equipped with temperature measuring devices according to the manufacturer's regulations, generally 630kVA and above transformers. According to the phase number of a single transformer, it can be divided into three-phase transformer and single-phase transformer. In three-phase power systems, three-phase transformers are generally used. When the capacity is too large and limited by transportation conditions, three single-phase transformers can also be used to form a transformer bank in three-phase power systems. According to the number of windings, it can be divided into two winding transformers and three winding transformers. Generally, transformers are double winding transformers, that is, there are two windings on the iron core, one is the primary winding and the other is the secondary winding. The three winding transformer is a transformer with large capacity (above 5600 KVA), which is used to connect three different voltage transmission lines. In special cases, there are also transformers with more windings. According to the structure, it can be divided into core type transformer and shell type transformer. If the winding is wrapped around the iron core, it is an iron core transformer; If the iron core is wrapped around the winding, it is a shell type transformer. However, they are slightly different in structure and have no essential difference in principle. All power transformers are iron core type. According to insulation and cooling conditions, it can be divided into oil immersed transformer and dry type transformer. In order to strengthen the insulation and cooling conditions, the core and winding of the transformer are immersed together in the oil tank filled with transformer oil. In special cases, such as street lamps and mine lighting, dry-type transformers are also used. In addition, there are various special transformers for special purposes. For example, high-voltage transformer for test, transformer for electric furnace, transformer for electric welding and transformer for SCR circuit, voltage transformer and current transformer for measuring instrument. Conservator Type Transformer,380v transformer,66KV Transformer,medium voltage transformer,High voltage transformer

On May 25, the energy-saving electric arc furnace transformer and large box transformer independently developed by New Electric Power were sent to a key project! 1. The low voltage winding of oil immersed transformer generally adopts the cylindrical structure of copper foil winding, except for the small capacity of copper wire; High voltage winding adopts multi layer cylindrical structure, which makes the distribution of ampere turn of winding balanced, with small magnetic leakage, high mechanical strength and strong short-circuit resistance. 2. The iron core and winding adopt fastening measures respectively. The fastening parts such as the height of the device and the low voltage lead are equipped with self locking locknuts. The structure without lifting the core is adopted, which can withstand the bumping during transportation. 3. The coil and iron core are vacuum dried, and the transformer oil is vacuum filtered and filled to minimize the moisture inside the transformer. 4. The oil tank adopts corrugated sheet, which has breathing function to compensate for the volume change of oil caused by temperature change, so this product has no oil conservator, obviously reducing the height of transformer. 5. Because the corrugated plate replaces the oil conservator, the transformer oil is isolated from the outside, which effectively prevents the entry of oxygen and water and leads to the decline of insulation performance. 6. According to the above five performances, the oil-immersed transformer does not need to change oil during normal operation, which greatly reduces the maintenance cost of the transformer and extends the service life of the transformer. Oil Immersed Transformers,high voltage Transformer,distribution transformers,distribution transformer,Medium and high voltage transformer