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As a buyer of power equipment, you will inevitably be confused when selecting: what can a power transformer be used for? What type of power transformer should be selected in different scenarios? After all, choosing the right application scenario and matching the precise product directly determines the project’s power supply stability and return on investment.
This article will clearly deconstruct the core function d'un transformateur de puissance. The mainstream power transformer application clarifies which scenarios must not be used, and combined with the adaptability advantages of Chuanli products, helps you accurately complete the matching of “scenario-product” and avoid the selection error.
Before discussing the application scenarios, clarify the core issue first: what is the core use of a transformateur de puissance? In short, its core function is to realize voltage level conversion through electromagnetic induction, while ensuring the efficient and safe transmission of electricity – this is also the key difference between it and ordinary transformers, which can be adapted to high voltage and large capacity power scenarios.
Specifically, its core uses can be summarized into three points: First, “boosting transmission,” raising the low voltage of power plants to high voltage to reduce transmission losses over long distances; The second is “low-voltage distribution”, which reduces the high voltage to a low voltage that can be used by users (such as industrial 380V and residential 220V); The third is “isolation and stabilization”, which realizes circuit isolation and voltage stabilization, and protects the precision equipment. All series of electric power transformers of Chuanli are designed around these three core uses, covering types of power transformers and transformateur de puissance utiliser.
This is the most basic and most important application scenario of transformateurs de puissance. The voltage output by the power plant cannot meet the demand for long-distance transmission, and it needs to be raised to 110 kV, 220 kV, or even higher through a step-up transformer. After the power is transmitted to the city or industrial area, it is reduced to 10kV, 0.4kV, and other user-end voltages through a step-down transformer.
Large industrial enterprises such as steel, chemical, and machinery manufacturing require a large number of high-pressure equipment (such as furnaces and motors), and at the same time, there is a low-voltage power supply requirement for precision instruments. Power transformers are the core of balancing voltage. In addition, the load fluctuation of industrial scenes is large, and the overload ability and stability of transformers are extremely high.
In photovoltaic, wind power, and other renewable energy projects, the output voltage of photovoltaic panels and wind turbines is unstable, and it needs to be connected to the power grid. The voltage must be regulated and matched through power transformers. Such scenes are mostly located in outdoor and high-altitude areas, and have extremely high requirements for the environmental adaptability of transformers.
The core requirement of scenarios such as shopping malls, office buildings, and residential communities is to reduce the 10kV voltage of the power grid to the 0.4kV voltage of household electricity while ensuring the stability of multiple users’ simultaneous electricity use. Such scenes are mostly installed indoors, with strict requirements for noise, volume, and safety.
The traction power supply system of the subway and high-speed railway needs a high-voltage power supply, while the station lighting and control system needs low-voltage power, and the traffic scene has extremely high requirements for the reliability of the power supply (a power outage will affect operation). In addition, the subway is mostly a closed underground environment, which requires strict requirements for the heat dissipation and fire resistance of transformers.
Key scenarios such as hospitals, data centers, and nuclear power plants require “zero tolerance” for the stability and security of power supply – the life support equipment of hospitals and the servers of data centers will suffer huge losses if the power is cut. Such scenarios require transformers with redundant design and rapid fault response capabilities.
| Scénarios d'application | Core Needs | Chuanli Adaptable Products | Core Product Advantages |
| Power Transmission and Distribution Systems | Step-up and Step-down Transformers, Low Loss, High Reliability | 110kV-220kV Oil-Immersed Transformers | Level 1 Energy Efficiency, Low Loss, Suitable for Long-Distance Transmission |
| Industrial Systems | Overload Capacity, Harsh Environment Resistance | Customized Oil-Immersed/Dry-Type Transformers | IP65 Protection, Corrosion Resistance, 120% Overload Support |
| Énergies renouvelables | High Altitude Adaptability, Stable Voltage | High Altitude Dedicated Transformer | Precise Voltage Regulation, Low Temperature Resistance, Adaptable to Fluctuating Loads |
| Commercial & Civilian Use | Low Noise, Compact Size, Safe | Dry-Type Epoxy Casting Transformer | Noise ≤50dB, Compact Design, Fireproof & Explosion-proof |
| Railway Transportation | High reliability, adaptable to enclosed environments | Dedicated dry-type transformer for subways | Forced air cooling, dual protection, long service life |
| Key Infrastructure | Zero Fault Tolerance, Interference Resistance | Dual-Winding Isolation Transformer | Online monitoring, Class F insulation, 8-year warranty |
Low-voltage electronic devices such as mobile phone chargers and small printers only require a small capacity (a few watts to tens of watts) voltage conversion, while the minimum capacity of power transformers is as high as 400kVA, which is seriously overcapacity. In addition, the power transformer is large in size and expensive, which is completely not suitable for the portable requirements of small equipment. Small electronic transformers, not power transformers, should be selected for such scenarios.
The core of the power transformer is electromagnetic induction, relying on AC to produce a changing magnetic field. If it is used in a pure DC circuit (such as battery-powered equipment, a DC motor local circuit), it cannot realize voltage conversion and will also cause the iron core to overheat and burn due to constant current. DC-DC converters are required for such scenarios.
In outdoor temporary lighting, mobile construction small equipment, and other scenes, the equipment weight and portability requirements are high, but the weight of the power transformer (even dry) is hundreds of kilograms, which is impossible to move. Small portable transformers or generators should be selected for such scenarios to avoid forcing the use of power transformers.
Small workshops, family workshops, and other low-power scenarios (total power ≤ 10kW), if using power transformers, the initial procurement cost and later operation and maintenance cost will increase significantly, far exceeding the actual demand. For such scenarios, ordinary low-voltage transformers can be selected, which are more cost-effective.
The regular protection and materials of power transformers are not suitable for scenes such as deep-sea equipment and strong radiation environments – high pressure in the deep sea will cause sealing failure, and strong radiation will accelerate the aging of insulation. Such scenarios require custom-made special transformers, rather than general-purpose power transformers.
The application scenarios of power transformers are mainly centered on “high voltage, large capacity, and stable transmission,” covering the mainstream needs of buyers from power transmission and distribution to industry, new energy, and transportation, but are absolutely not suitable for low voltage, DC, and portable scenarios. Choosing the right scene is the first step in procurement; Choosing high-quality products suitable for the scene is the key to the long-term stability of the project.
Whether you are purchasing for industrial projects or adapting to new energy and transportation scenarios, Chuanli can provide a one-stop solution of “scenario-product-service”. The core advantage of Chuanli is to help you accurately find products suitable for your own scene, balance stability and cost, and make every procurement budget bring the maximum value.
Q1: If there are multiple scenarios for the same project (e.g., industrial + civil), do we need to purchase power transformers separately?
Chuanli can provide customized transformers with multiple windings, one device can output different voltage levels at the same time, adapt to multiple scenarios, and reduce the number of purchases and installation space.
Q2: Will the application scenarios of power transformers affect the selection?
It has a great impact. For outdoor and large-capacity scenarios (such as power transmission and distribution, open-air industrial parks), choose oil-immersed (good heat dissipation, large capacity); Dry type (fireproof and explosion-proof, low noise) is selected for indoor and closed scenes (such as shopping malls and subways). Chuanli will directly recommend the type of adapter based on your installation environment (indoor/outdoor, ventilation conditions).
Q3: Are there any differences between power transformers for new energy scenarios (photovoltaic/wind power) and those used in general industry?
There is a clear difference. The transformers for new energy scenarios need to be compatible with “fluctuating loads” (unstable output of photovoltaic/wind power) and “special environments” (high altitude, outdoor). The products of Chuanli will optimize the voltage regulator and insulation structure, and ordinary industrial transformers are prone to failure when used.
Q4: How can I determine whether my project requires a power transformer rather than an ordinary transformer?
The core is to look at two indicators: voltage level (≥ 10 kV requires a power transformer) and capacity (≥ 400 kVA suggests using a power transformer). If your project is a high-voltage, large-capacity power supply (such as a factory, community distribution network), the power transformer is a must-have; If it is a low-voltage, small-capacity (such as a small workshop), a common transformer can be used. Chuanli offers scene evaluation services free of charge.
