Overview

MV Mold Transformer, also known as a Medium Voltage Cast Resin Dry-Type Transformer, is an essential power distribution device used to convert medium-voltage electrical power into low-voltage power for downstream distribution systems. It is commonly installed between medium-voltage switchgear and low-voltage switchgear, switchboards, panelboards, or motor control systems. In a complete power distribution solution, the transformer works together with MV switchgear, LV switchgear, distribution boards, and protection devices to provide stable and safe power for industrial, commercial, infrastructure, and energy projects.

Unlike oil-immersed transformers, a mold transformer uses cast resin insulation technology. The high-voltage and low-voltage windings are encapsulated or insulated with epoxy resin or similar solid insulation materials. This structure provides good moisture resistance, high mechanical strength, flame-retardant performance, and reliable insulation characteristics. Because it does not use transformer oil as the main insulating and cooling medium, it is more suitable for indoor installation and applications where fire safety, environmental protection, and low maintenance are important.

The MV Mold Transformer is widely used in substations, industrial plants, commercial buildings, data centers, hospitals, rail transit systems, renewable energy projects, and unit substations. It can be customized according to the customer’s required voltage ratio, rated capacity, frequency, vector group, impedance, enclosure type, cooling method, temperature rise, and installation environment. For international projects, the transformer can be designed according to applicable project standards and electrical system requirements.

This product is suitable for medium-voltage to low-voltage conversion in distribution systems. It can support stable operation of downstream low-voltage switchboards, panelboards, production equipment, HVAC systems, lighting systems, charging facilities, pumps, motors, and other electrical loads. With a compact structure and high safety level, it is a practical choice for modern power distribution systems that require reliability, safety, and long service life.

Product Advantages

1. Safe Cast Resin Insulation Structure
The transformer adopts a cast resin dry-type insulation structure. The windings are protected by resin insulation, which provides excellent dielectric performance and strong resistance to moisture, dust, and environmental impact. This design helps improve operational safety and reduces the risk of insulation failure in demanding environments.

2. No Transformer Oil, Better Fire Safety
Compared with traditional oil-immersed transformers, the dry-type mold transformer does not require insulating oil. This reduces the risk of oil leakage, oil pollution, and oil-related fire hazards. It is suitable for indoor power rooms, commercial buildings, hospitals, data centers, subway stations, tunnels, high-rise buildings, and other places with strict fire safety requirements.

3. Low Maintenance and Easy Operation
The dry-type structure requires less routine maintenance than oil-immersed transformers. There is no need for oil level inspection, oil filtration, or oil replacement. This reduces maintenance workload and helps users lower long-term operation costs. For industrial and commercial projects, this is especially valuable because stable power supply and easy maintenance are important.

4. Excellent Mechanical Strength
The cast resin winding structure offers good mechanical strength and short-circuit resistance. During transportation, installation, and operation, the transformer can maintain stable performance under mechanical stress and electrical stress. This improves service reliability and helps ensure long-term performance in power distribution systems.

5. Suitable for Indoor Installation
MV Mold Transformer is ideal for indoor installation because of its compact design, clean operation, and safe dry-type structure. It can be installed in electrical rooms, substations, unit substations, factory power rooms, and building distribution centers. When an enclosure is required, the transformer can be supplied with a protective cabinet according to the site environment.

6. Flexible Customization for Different Projects
The transformer can be customized according to the project’s electrical design. Key customization options include rated capacity, primary voltage, secondary voltage, frequency, vector group, impedance, tapping range, enclosure protection level, cooling method, temperature monitoring, fan cooling, and control accessories. This flexibility makes it suitable for different countries, grid systems, and engineering requirements.

7. Environmentally Friendly Design
Because the product does not use oil as the primary insulating medium, it helps reduce the risk of environmental contamination caused by oil leakage. The low-maintenance design also reduces resource consumption during operation. This makes it a suitable solution for modern green buildings, renewable energy projects, and environmentally sensitive facilities.

8. Reliable Power Conversion for Complete Distribution Systems
The transformer is designed to work as a key part of a complete power distribution system. It receives power from medium-voltage switchgear and supplies power to low-voltage distribution equipment. This makes it suitable for integrated solutions such as secondary unit substations, industrial distribution systems, commercial power rooms, and infrastructure power networks.

Product Specifications

Product Applications

MV Mold Transformer is widely used in medium-voltage and low-voltage power distribution systems. Its main function is to step down medium voltage to low voltage and supply reliable power to downstream electrical equipment. Because of its dry-type structure, high safety level, and low maintenance requirements, it is especially suitable for indoor and safety-sensitive applications.

In industrial facilities, MV Mold Transformer can be used in manufacturing plants, battery factories, semiconductor plants, steel plants, mining projects, chemical plants, cement plants, and machinery production lines. These facilities require stable power supply for production equipment, motors, lighting, HVAC systems, and automation systems. The transformer helps provide reliable power conversion and supports continuous operation.

In commercial buildings, the transformer can be installed in office buildings, shopping centers, hotels, schools, hospitals, high-rise buildings, and public facilities. For these projects, fire safety, low noise, clean operation, and easy maintenance are important. The dry-type cast resin transformer is suitable because it does not use transformer oil and can be installed close to the load center when designed properly.

In infrastructure projects, MV Mold Transformer can be used in airports, railway stations, subway systems, tunnels, water treatment plants, ports, municipal facilities, and transportation hubs. These applications often require reliable power equipment with stable performance and safe operation. The transformer can work with MV switchgear and LV switchboards to form a complete power distribution system.

In renewable energy and distributed generation projects, MV Mold Transformer can be used in solar power plants, wind power systems, energy storage stations, EV charging infrastructure, and distributed energy systems. It can help convert and distribute power according to the system design and provide reliable connection between medium-voltage networks and low-voltage loads.

In secondary unit substations, the transformer is a central component that connects the medium-voltage side and the low-voltage side. It can be integrated with MV switchgear, LV switchgear, switchboards, and panelboards to form a compact and complete power distribution solution. This type of integrated solution is suitable for industrial parks, commercial complexes, public buildings, and utility distribution projects.

Overall, MV Mold Transformer is a safe, reliable, and efficient power conversion product for modern distribution systems. With cast resin insulation, dry-type design, flexible customization, and low maintenance requirements, it is a strong solution for customers who need medium-voltage power transformation in industrial, commercial, infrastructure, and energy applications.