Quality Oil Immersed Transformer & Dry Type Transformer factory

China has achieved a breakthrough in developing a low-noise UHV reactor for transformers. The product passed type testing, witnessed by experts from the my country Electric Power Research Institute, with a measured noise level of just 61.6dB(A). Partial discharge was also kept below 10pC, with a minimum peak-to-peak amplitude of 5 microns. These figures mark a new global record for low-noise technology in large-capacity UHV reactors. The reactor features a dual-body design with direct-connected leads and oil-immersed, self-cooling technology. This product utilizes core technologies, including research and development results in vibration and noise reduction. By systematically suppressing vibration sources, isolating noise propagation, and damping vibration and acoustic waves, it effectively addresses long-standing engineering challenges associated with reactors, including high amplitude, high noise, and localized overheating. This breakthrough is significant because, as core equipment in high-voltage transmission systems, reactors have long faced challenges worldwide in terms of vibration, noise, and overheating due to their unique structure. These challenges are particularly significant in meeting my country's environmental protection requirements. This breakthrough has eliminated the need for external soundproofing enclosures for UHV equipment during actual operation, resolving noise pollution issues while also saving equipment costs and installation space. This technological breakthrough in transformers stems from an innovative spirit that dares to challenge established standards. During the R&D phase for enhanced power sand filling experiments, experts generally believed that finer sand was better, but our technicians persisted in experimenting with sand of varying particle sizes. After extensive testing, they discovered that sand with appropriate gaps in the sand actually achieved greater noise reduction. This approach, based on experimental data rather than blindly adhering to conventional wisdom, laid the foundation for the current technological breakthrough. The low-noise UHV reactor that passed this test will be used in my country's UHV power grid construction. Similar low-noise reactors, which entered operation in early 2025, are already in use in the western Sichuan UHV ring network, providing critical support for the "West-to-East Power Transmission" strategy. Compared to earlier products, the new reactor not only further reduces noise levels, but its systematic and innovative solution also provides key technical support for my country's efforts to build a green power grid and a new power system. This technological breakthrough not only solves engineering problems such as vibration, noise and local overheating that have long plagued the industry, but also provides key support for my country to build a green power grid and new power system.

Transformers are not indestructible. Rust in the core and windings—their lifeblood—can lead to increased iron losses, poor heat dissipation from the windings, decreased efficiency, and a hidden increase in power consumption. In severe cases, it can cause localized overheating, posing a safety hazard. Rust in fasteners and structural components can cause bolts to seize and reduce the strength of the enclosure, complicating routine maintenance and troubleshooting, significantly increasing operational costs and time. Corrosion is a slow, irreversible chemical reaction, accelerated dramatically by challenges such as salt spray in coastal areas, polluted gases in industrial areas, and high humidity during transportation and storage. For transformers, rust prevention is no small matter; it is crucial for ensuring power grid safety and improving economic efficiency. The Evolution and Breakthroughs of Rust Prevention TechnologyHumanity's battle against rust is a long one, and methods are constantly evolving. Traditional methods, such as applying rust-preventive oil or butter, are cumbersome, easily contaminated by dust, and require thorough cleaning before use, otherwise the transformer oil quality will be affected. Their protection period is short, making them inadequate for long-term storage and harsh transportation environments. The advent of VCI (vapor corrosion inhibitor) technology is revolutionary. This technology eliminates the need for direct metal contact. In a confined space, the anti-rust ingredients continuously evaporate and adsorb onto the metal surface, forming a protective film just a few molecules thick that effectively blocks moisture and corrosive substances. Even within complex internal structures, crevices, and holes, this technology provides comprehensive, no-blinds protection, lasting for years. Core Requirements of Modern Anti-Rust MaterialsAn excellent modern anti-rust packaging material should be a systematic solution, demonstrating the following capabilities: High Efficiency and Long-Lasting: Provides continuous protection for years, adapting to harsh environments such as temperature and humidity fluctuations.Full Coverage: Protects every geometric surface of the product, including hard-to-reach crevices and delicate areas.Clean and Environmentally Friendly: The material itself leaves no residue or contamination, allowing it to be used directly after removing the packaging.Convenient and Intelligent: Simple operation, eliminating the need for complex painting and cleaning processes.Customizable: Provides personalized solutions based on the size, shape, and specific needs of the equipment. Choosing an advanced rust prevention solution isn't just a cost expense; it's a crucial investment. It's an investment in the stability of the equipment's value, absolute operational reliability, reduced maintenance costs, and ultimately, the long-term security of the entire power grid system. With continuous advancements in materials science and technology, rust prevention technology is evolving towards a more environmentally friendly, intelligent, and integrated approach. In the future, we may see "smart rust prevention films" integrated with the Internet of Things (IoT) that monitor temperature, humidity, and corrosion factors inside packaging in real time, enabling predictive maintenance.

Industry standards and practical experiences suggest that well-maintained dry type transformers can serve effectively for up to 35 years or more under optimal conditions. In exceptional cases, they may even last up to 30 years. The service life of a dry-type transformer is primarily affected by the following factors: Temperature: Temperature is a significant factor affecting the service life of a dry-type transformer. High temperatures can cause insulation materials to age, weakening their insulation capacity and accelerating the decline in transformer life. Therefore, maintaining the normal operating temperature of the dry-type transformer is key to extending its service life. Load: The load of a dry-type transformer also affects its service life. Long-term overload operation can cause the transformer to overheat, damage the insulation materials, and shorten its service life. Therefore, it is crucial to properly manage the load when using a dry-type transformer. Ambient humidity: Humidity also has a significant impact on the service life of a dry-type transformer. High humidity can cause moisture in the insulation materials, leading to leakage and even short-circuit accidents. Therefore, it is important to carefully control the ambient humidity when installing a dry-type transformer. Maintenance: Regular maintenance can extend the service life of a dry-type transformer. For example, regular inspections of insulation material degradation and timely replacement of damaged parts are essential to ensure the longevity of a dry-type transformer. In general, the service life of a dry-type transformer is approximately 25 to 30 years, but the specific lifespan depends on a combination of the above factors. If dry-type transformers are properly operated and maintained, it is possible to further extend their service life.

As an indispensable key component of modern power systems, dry-type transformers are rapidly replacing traditional oil-immersed transformers worldwide with their unique oil-free design and superior safety performance. Basic Concepts and Operating Principles of Dry-Type Transformers Dry-type transformers are power transformers that do not use a liquid insulating medium (such as transformer oil). Instead, their windings and core are either directly exposed to the air or encapsulated with solid insulating material. Compared to traditional oil-immersed transformers, dry-type transformers use solid insulating materials (such as epoxy resin and fiberglass) to achieve electrical isolation between windings, completely eliminating the risk of oil leakage and fire. They are particularly suitable for applications requiring high safety and environmental protection. Based on the insulation method, dry-type transformers are mainly divided into two categories: impregnated (VPI) and cast (CRT). The former uses a vacuum pressure impregnation process to impregnate the windings with insulating varnish, while the latter uses vacuum-cast epoxy resin to form a solid insulating protective layer. In terms of their operating principle, dry-type transformers still adhere to the basic physical principle of electromagnetic induction. When alternating current passes through the primary winding, it generates alternating magnetic flux in the core, which in turn induces an electromotive force in the secondary winding, achieving voltage conversion. However, dry-type transformers implement this basic principle through unique structural design and material selection to optimize performance. For example, TBEA's newly developed patented dry-type transformer technology utilizes three parallel core legs with their axes perpendicular to the bottom surface. This effectively optimizes magnetic field distribution and reduces circulating and eddy current losses. This innovative core structure, combined with low-voltage windings and specially wound foil (with a winding angle controlled between 175° and 185°), significantly improves transformer energy efficiency. Dry-type transformers have a wide range of rated capacities, ranging from tens of kVA to tens of thousands of kVA, with 1000 kVA dry-type transformers being a mainstream product in the market. These transformers typically utilize laminated high-permeability silicon steel sheets for the core. The windings are vacuum-cast, and efficient heat dissipation is achieved through natural or forced air cooling systems. In terms of voltage level, dry-type transformers have developed from the traditional 10kV and 35kV to today's 66kV and even higher. The names of dry-type transformers generally reflect their technical characteristics. In the "SCB" series, "S" stands for three-phase, "C" for cast-type, and "B" for foil windings. The following number represents the performance level; for example, "SCB18" indicates energy efficiency that meets the Type 18 standard. With technological advances, the energy efficiency rating of dry-type transformers continues to improve. The use of new materials such as amorphous alloys has reduced both no-load and loaded losses by approximately 15%-20% compared to traditional oil-immersed transformers. These technological advances have made dry-type transformers increasingly critical in power system upgrades and the development of renewable energy. Core Structure and Material Innovations in Dry-Type Transformers The structural design of dry-type transformers directly determines their performance and service life. Modern dry-type transformers achieve safe, efficient, and reliable operation through sophisticated component configuration and innovative material application. A typical dry-type transformer consists of four core components: the core, windings, insulation system, and cooling system. Each component is meticulously designed and optimized to meet the demanding requirements of different application scenarios. The iron core structure forms the foundation of a dry-type transformer's magnetic circuit. It is typically constructed by laminating high-permeability cold-rolled silicon steel sheets. The thickness and lamination process of the silicon steel sheets directly impact the transformer's no-load losses. TBEA's latest patented technology demonstrates an innovative approach to iron core design: a structure with three parallel core legs, with their axes perpendicular to the base, effectively optimizes magnetic field distribution and reduces energy loss. Even more advanced are iron cores made from amorphous alloys, which can reduce no-load losses by over 30% compared to traditional silicon steel sheets, making them particularly suitable for applications with large load fluctuations. While costly, amorphous alloys offer significant energy-saving benefits over their entire lifecycle and are becoming a standard feature of high-end dry-type transformers. The winding system, as the circuit component of a dry-type transformer, has a direct impact on its load losses and short-circuit resistance. Modern dry-type transformer windings are primarily copper and aluminum. Copper offers superior conductivity but a higher cost, while aluminum offers a more competitive price. In TBEA's patented design, each core leg is equipped with a low-voltage winding, which is wrapped in multiple layers of foil around the outer circumference of the core leg. This structure not only improves efficiency but also reduces energy loss caused by eddy currents. The winding insulation is cast or impregnated with epoxy resin, creating a strong insulating protective layer that can withstand high voltage surges and effectively dissipate heat. The insulation system is a key feature that distinguishes dry-type transformers from oil-immersed transformers and is a crucial factor in their safety. Modern dry-type transformers primarily use epoxy resin casting or vacuum pressure impregnation (VPI) insulation methods. Epoxy resin casting completely seals the windings in the insulating material, providing excellent moisture and dust resistance. For example, Shunte Electric uses this technology to keep transformer noise in data centers below 50 decibels. VPI technology, on the other hand, uses multiple vacuum pressure impregnations to deeply infuse the insulating varnish into the windings, forming a uniform insulation layer. Jingquanhua's latest dry-type transformers feature an optimized insulation system design, providing a safer and more reliable power supply solution for data centers. The cooling system has a decisive influence on the load capacity and life of dry-type transformers. Since there is no oil as a cooling medium, dry-type transformers mainly rely on air convection to dissipate heat. Common cooling methods include natural air cooling (AN) and forced air cooling (AF). Large-capacity dry-type transformers are usually designed in AN/AF hybrid mode, which cools naturally under normal load and starts fans for forced cooling when overloaded. By optimizing the air duct design and heat dissipation area, 1000kVA dry-type transformers can keep the temperature rise within a reasonable range even under high load. Envision Energy's 66kV dry-type transformers for offshore wind turbines adopt an ultra-compact design, achieving efficient heat dissipation in a limited space, meeting the operating requirements in harsh offshore environments.

Electrical Knowledge | Key Differences Between Substations, Switchyards, Transformer Substations, Distribution Rooms, and Box Transformers Substation A substation is where voltage levels are transformed—either stepped up or down—to ensure stable transmission and distribution of electrical power. Substations handle voltages typically below 110 kV and often include voltage regulation, current control, and protection systems. Switchgear Station A switchgear station (also known as a switch station) is equipped with high-voltage equipment used exclusively for switching and distributing electricity. It does not include a main transformer, which distinguishes it from transformer substations. Transformer Substation This type of station includes one or more power transformers and is responsible for stepping voltage levels up or down. It plays a key role in voltage conversion and load distribution between the transmission and distribution networks. Distribution Room Also called a distribution station, this facility is focused on distributing electricity at lower voltages for end-user consumption. It contains mainly low- and medium-voltage switchgear and protects equipment downstream. Box-Type Transformer (Box Substation) A box-type transformer integrates a transformer, high-voltage switchgear, low-voltage distribution panel, metering, and compensation units into one compact enclosure. It's essentially a mini-substation used for fast deployment in urban or rural power networks. Each of these installations plays a unique role in the power supply chain, from large-scale voltage transformation to localized power delivery.

When a power transformer fails, the situation can be very serious, with consequences ranging from damage to the equipment itself to the paralysis of the entire power grid, and even safety incidents such as fire or explosion. Exactly what happens depends on the type of fault, its severity, the design of the transformer, and how quickly the protective devices can operate. Here are some possible scenarios: Abnormal phenomena (observable signs): Overheating: A large amount of heat is generated locally at the fault point, causing the oil temperature or winding temperature to rise sharply. The thermometer or thermal imager will alarm. Abnormal sound: Strong "buzzing", "crackling", "bursting" or even "roaring" sounds are heard inside. This is caused by strong electromagnetic vibrations caused by arc discharge, insulation material rupture, loose core or severe overcurrent. Abnormal oil level change: Gas generated by internal faults or large amounts of gas generated by high-temperature decomposition of insulating oil by arcs may cause abnormal oil level increase (increased pressure) or decrease (leakage). Oil spray or oil leakage: A sharp increase in internal pressure may cause the pressure relief valve to spray oil, or oil tanks, pipes, radiators and other parts may rupture and leak oil due to overheating, pressure or mechanical stress. Smoke and fire: High temperature and arcs may ignite insulating oil or solid insulating materials, causing the transformer to smoke or even catch fire. Gas generation: Insulating oil decomposes under high temperature and arcing to produce gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, carbon dioxide, etc. (Dissolved gas analysis/DGA is an important fault diagnosis method). Large amounts of gas accumulation may cause a sudden increase in pressure. Shell deformation or rupture: In extreme cases, huge internal pressure or arc energy may cause the transformer tank to swell, deform or even burst. Internal damage: Winding failure: Turn-to-turn short circuit: The insulation between adjacent turns in the same winding is damaged, forming a short-circuit loop and causing local overheating. Interlayer short circuit: The insulation between winding layers is damaged. Phase-to-phase short circuit: The insulation between different phase windings is broken. Winding short circuit to ground: The insulation between the winding and the core or tank (ground) is broken. Winding open circuit: The wire is broken or the connection point is unsoldered. Winding deformation/displacement: The huge short-circuit electromotive force causes the winding to mechanically deform, loosen or even collapse. Core failure: Core multi-point grounding: The core should be designed to have only one reliable grounding point. If there is an additional grounding point, a circulating current will be formed, causing local overheating or even melting of the core. Short circuit between core pieces: Damage to the insulating paint leads to short circuit between pieces, resulting in increased eddy current loss and overheating. Insulation system failure: Aging, moisture, and breakdown of solid insulation (cardboard, stays, etc.). Aging, moisture, contamination, carbonization, and decreased breakdown strength of insulating oil. Tap switch failure: Poor contact, contact erosion, insulation breakdown, mechanical jamming, or drive mechanism failure. Bushing failure: Flashover, dirty discharge, internal moisture or cracking leading to breakdown, or seal failure and oil leakage. Cooling system failure: Radiator blockage, fan/oil pump stoppage, cooling pipeline leakage, resulting in poor heat dissipation, temperature increase, accelerated insulation aging or failure. Impact on electrical system: Relay protection action: Transformers are equipped with multiple protections (differential protection, gas protection, overcurrent protection, pressure release protection, temperature protection, etc.). When a fault occurs, the relevant protection devices will quickly detect the abnormality (current imbalance, gas generation, pressure increase, excessive temperature) and act: Trip: Disconnect the circuit breaker connected to the transformer and isolate the faulty transformer from the power grid. This is the most critical link, aimed at preventing the accident from expanding. Alarm: Send out sound and light signals or remote alarm information. Voltage fluctuation or drop: The fault itself or the protection tripping will cause the bus voltage connected to the transformer to drop or fluctuate instantly, affecting the power supply quality of downstream users. Power supply interruption: If the faulty transformer is a key node in the power supply chain, its tripping will cause a large-scale power outage in the area it supplies power. System stability issues: The tripping of a large main transformer fault may disrupt the power balance and stability of the power grid, and in severe cases may cause a larger-scale power outage or even system collapse (cascading failure). Short-circuit current shock: A short-circuit fault inside the transformer will generate a huge short-circuit current, which will not only cause devastating damage to the transformer itself, but also cause huge electromotive force and thermal stress shock to the busbars, switchgear, lines, etc. connected to it. Safety risks: Fire and explosion: The sprayed high-temperature flammable insulating oil is very likely to cause a fire when it encounters air or electric arc. In a confined space, the oil-gas mixture may explode. This is the most dangerous situation. Toxic substance release: Burning insulating oil and insulating materials will release toxic smoke and gas. Equipment damage splash: Explosion or oil tank rupture may cause high-temperature oil, debris, and parts to splash, causing harm to personnel and nearby equipment. Environmental pollution: Large amounts of insulating oil leakage will pollute soil and water sources.

Understanding Transformer Structure: Key Components and Design Explained Body:Transformers play a vital role in power distribution, and their internal structure determines their performance and reliability. A standard transformer consists of the following main components: Core: Made of laminated silicon steel sheets to reduce energy loss and provide a magnetic path. Windings (primary and secondary): Copper or aluminum coils that transfer energy through electromagnetic induction. Insulation: Prevents electrical faults and ensures safe operation. Oil Tank: Usually contains oil (oil-immersed transformers) to dissipate heat and protect internal parts. Oil Conservator and Vent (Oil-immersed Transformers): Maintains oil level and prevents moisture intrusion. Cooling System: Air or oil-based system used to control heat. Bushing: Insulated terminals for external electrical connections. Understanding these components helps engineers and maintenance teams ensure optimal operation and life of the transformer.

1. Voltage level: Determined according to the input and output voltage requirements of the actual application scenario, it needs to match the grid voltage and the rated voltage of the electrical equipment, including the voltage values of the primary and secondary sides, such as the common 10kV/400V, etc.2. Capacity: Select according to the power demand of the load, considering the active power and reactive power of the load, generally in kilovolt-amperes (kVA), and need to meet the maximum power demand of the load, and appropriately reserve a certain margin to cope with possible load growth.3. Winding form: Commonly used are single-phase and three-phase windings. Single-phase is suitable for occasions with low power and single-phase loads, and three-phase is used for three-phase power supply and high power loads. In addition, there are special multi-winding transformers that can meet systems with multiple voltage output requirements.4. Core material: Mainly silicon steel sheet and amorphous alloy materials. Silicon steel sheet core is widely used and has good magnetic conductivity and cost performance; amorphous alloy core has lower iron loss, can effectively reduce energy consumption, and is suitable for occasions with high energy saving requirements.5. Cooling method: including oil-immersed self-cooling, oil-immersed air cooling, dry self-cooling, dry air cooling, etc. The oil-immersed type has good heat dissipation effect and large capacity, but the maintenance is relatively complicated; the dry type is more environmentally friendly, safe, and simple to maintain. It is often used in places with high requirements for fire prevention and explosion prevention.6. Short-circuit impedance: Short-circuit impedance affects the short-circuit current and voltage fluctuation of the transformer. Generally speaking, the short-circuit impedance is large and the short-circuit current is small, but the voltage change rate may be large. It is necessary to select a suitable short-circuit impedance value according to the stability of the system and the short-circuit capacity requirements.7. Insulation level: Determined according to the use environment and voltage level, it must be able to withstand the influence of factors such as overvoltage and insulation aging in the system to ensure the safe operation of the transformer, including the selection of insulation materials and the design of insulation structure.8. Overload capacity: Consider the possible short-term overload of the load, and select a transformer with appropriate overload capacity to ensure that it will not be quickly damaged when overloaded. Transformers of different types and designs have different overload capacities.9. Volume and weight: Due to the limitations of installation space and transportation conditions, in places with limited space, such as box-type substations, small distribution rooms, etc., it is necessary to choose transformers with small size and light weight, such as dry-type transformers or some specially designed compact transformers.10. Price and maintenance cost: Considering the purchase cost and the long-term maintenance cost, the prices of transformers of different brands, specifications and technical parameters vary greatly. At the same time, the maintenance costs of oil-immersed transformers and dry-type transformers are also different, and a comprehensive economic evaluation is required.

Basic knowledge of electricity: Analysis of four common transformer types and their application scenarios Transformers are indispensable core equipment in modern power systems, used to regulate voltage, transmit energy, and ensure stable power supply. According to different functions and applications, transformers are mainly divided into the following four types: Power transformers: used in high-voltage transmission systems to connect power stations and transmission lines. Distribution transformers: installed in residential or industrial areas, responsible for reducing high voltage to usable low voltage. Autotransformer: has a structure with some coils shared, small size, high efficiency, suitable for limited space occasions. Instrument transformers: including current transformers and voltage transformers, used for measurement and protection systems. Mastering these basic knowledge will help to more reasonably select and apply transformers and improve the efficiency and safety of power systems.

Any electrical equipment will suffer losses during long-term operation, and power transformers are no exception. The losses of power transformers are mainly divided into copper loss and iron loss. Definition and Principle Copper plays an important role in transformers. Copper wires are usually used in transformer windings. The "copper loss" in the transformer is the loss caused by the copper wires. The "copper loss" of the transformer is also called load loss. The so-called load loss is a variable loss, which is variable. When the transformer is running under load, there will be resistance when the current passes through the wire, resulting in resistance loss. According to Joule's law, this resistance will generate Joule heat when the current flows through it, and the greater the current, the greater the power loss. Therefore, the resistance loss is proportional to the square of the current and has nothing to do with the voltage. It is precisely because it changes with the current that the copper loss (load loss) is a variable loss, and it is also the main loss in the operation of the transformer. Influencing factors Current size: As mentioned above, copper loss is proportional to the square of the current, so the current size is the key factor affecting copper loss.Winding resistance: The resistance of the winding directly affects the copper loss. The larger the resistance, the higher the copper loss. Number of coil layers: The more coil layers there are, the longer the path for the current to flow in the winding, and the resistance will increase accordingly, resulting in increased copper loss. Switching frequency: The effect of switching frequency on transformer copper loss is directly related to the distributed parameters and load characteristics of the transformer. When the load characteristics and distributed parameters are inductive, the copper loss decreases with the increase of switching frequency; when they are capacitive, the copper loss increases with the increase of switching frequency. Temperature influence: Load loss is also affected by the temperature of the transformer. At the same time, the leakage flux caused by the load current will generate eddy current loss in the winding and stray loss in the metal part outside the winding. Calculation method There are two calculation formulas1. Formula based on rated current and resistance:Copper loss (unit: kW) = I² × Rc × ΔtWhere I is the rated current of the transformer, Rc is the resistance of the copper conductor, and Δt is the operating time of the transformer.2. Formula based on rated current and total copper resistance: Copper loss = I² × RWhere I represents the rated current of the transformer, and R represents the total copper resistance of the transformer. The total copper resistance R of the transformer can be calculated by the following formula: R = (R1 + R2) / 2Where R1 represents the primary copper resistance of the transformer, and R2 represents the secondary copper resistance of the transformer. Methods to reduce copper loss Increase the winding cross-sectional area of the transformer: reduce the conductor resistance, thereby effectively reducing the copper loss of the transformer. Use high-quality conductor materials: such as copper foil or aluminum foil to reduce winding resistance. Reduce the light-load operation time of the transformer: limit the proportion of the time when the transformer is light-loaded, which is conducive to reducing the copper loss of the transformer.

Siemens Energy expects to start making large industrial power transformers in the U.S. in 2027 and could further expand its Charlotte plant if demand and import tariffs remain high, senior executives said. Siemens Energy, which gets more than a fifth of its sales in the U.S. and has about 12% of its roughly 100,000 employees in the U.S., has several plants making wind and gas turbines as well as grid components. Overall, more than 80% of so-called large power transformers (LPTs) -- bus-sized components needed to convert grid transmission voltage levels -- are currently imported into the U.S., said Tim Holt, a Siemens Energy board member. That’s why Siemens Energy is expanding its plant in Charlotte, North Carolina, with the first local LPTs expected to roll off the factory line in early 2027, Holt said, adding that there is plenty of room for further expansion if needed. The company expects total investment in the outdated U.S. grid to reach $2 trillion by 2050, as power demand is expected to surge thanks to data centers needed for artificial intelligence technology. “This time, we expect the boom cycle for grid expansion to be longer than the usual two to three years. The market is very optimistic now,” Holt, who runs Siemens Energy’s U.S. business, said at a company event. Maria Ferraro, finance chief at Siemens Energy, said the group was taking a medium- to long-term view on the U.S. market, where some companies are rethinking their footprint in the wake of U.S. President Donald Trump’s trade war. “Will we change our strategy or the way we approach the U.S.? I would say no, because we already have a long-term foundation there and it’s a key market for us,” Ferraro said. Siemens Energy said in May it expected U.S. import tariffs to reduce group net profit by less than 100 million euros ($117 million) in 2025 after Trump threatened to impose 50% tariffs on EU goods if no deal was reached by July 9. “Any significant change in tariffs would also mean we review our estimated impact,” Ferraro said.

April 28-29, 2025 Wuxi, Jiangsu The "2025 China Power Transformer Overseas and Intelligent Manufacturing Technology Conference" hosted by Shanghai Mogen Enterprise Management Consulting Co., Ltd. was successfully held at Wuxi Xizhou Garden Hotel from April 28 to 29, 2025. This conference brings together top industry scholars, industry leaders, investment institutions and policy makers. It will conduct in-depth discussions on core areas such as transformer overseas expansion and intelligent manufacturing, injecting new impetus into the coordinated development of the power transformer industry. The technological progress and innovation of China's transformer industry cannot be separated from the continuous and in-depth exchanges and cooperation between enterprises and industry elites. As an important industry exchange event, the 2025 China Power Transformer Overseas and Intelligent Manufacturing Technology Conference not only played an important role in promoting industrial technology cooperation and exchanges, and transformer enterprises going overseas, but also effectively accelerated the supply and demand docking and cooperation process in the upstream and downstream of the transformer industry chain.