EC Insulator Jiangxi Co., Ltd. is one of the most reliable manufacturers and suppliers of epoxy resin dry type transformer in China. With abundant experience, we are committed to offering high quality custom service. Please feel free to wholesale premium epoxy resin dry type transformer made in China here from our factory.
Product Overview
Designed for indoor power distribution applications, the epoxy resin dry type transformer is commonly installed in factories, commercial buildings, hospitals, data centers and other facilities where oil-free operation is preferred.
Unlike conventional oil-immersed transformers, this model uses epoxy resin casting insulation around the windings. During the casting process, the coils are covered with solid insulation instead of liquid materials, which avoids oil leakage concerns and reduces maintenance work related to oil systems.
As electrical rooms become more compact, transformer selection is no longer based only on power capacity. Space availability, fire protection requirements, environmental conditions and future maintenance access also influence the final design. The epoxy resin dry type transformer is developed for these indoor applications with a compact structure and sealed winding arrangement.
Before manufacturing starts, technical details such as rated capacity, voltage level, frequency and connection method are confirmed according to the project requirements. This helps ensure the selected configuration matches the actual distribution system.
Insulation Structure and Design
Epoxy resin casting is one of the main features of this transformer design. Through vacuum casting technology, resin fills the insulation gaps around the windings and forms a solid protective layer after curing.
During operation, the cured resin structure helps maintain insulation performance under conditions where moisture, dust or external contamination may exist. The winding system is protected without relying on liquid insulation.
A grain-oriented silicon steel core is applied to reduce magnetic losses. Meanwhile, insulation distance, winding arrangement and heat dissipation paths are designed according to voltage level, load characteristics and installation conditions.
Compared with oil-filled units, daily inspection requirements are different. There is no oil sampling, oil replacement or leakage checking involved during normal operation. Maintenance work mainly focuses on connection points, ventilation conditions and temperature monitoring.
Main Features
Built with epoxy resin cast windings, the transformer forms a solid insulation system that protects internal components from environmental influence.
No insulating oil is used inside the unit, making it suitable for indoor locations where fire safety and clean operation are important considerations.
For electrical rooms with limited installation space, the compact structure makes equipment arrangement easier. The low-loss core design also helps reduce unnecessary energy consumption during service.
Reduced maintenance requirements are another practical advantage. Without an oil system, operators do not need to carry out regular oil testing or replacement work.
According to different project conditions, parameters such as capacity, voltage ratio, connection method and protection structure can be adjusted during design.
Application and Installation
Common installation locations include industrial plants, commercial buildings, hospitals, data centers, railway facilities and enclosed substations.
In hospitals and data centers, transformers are often positioned close to important electrical loads. Before installation, engineers usually review available space, fire protection requirements and access conditions for future inspection.
For underground power rooms or areas with limited ventilation, an oil-free structure can simplify equipment management. However, ventilation design, ambient temperature and installation clearance still need to be considered during project planning.
Different applications may require different configurations. By reviewing the operating environment and electrical parameters, the epoxy resin dry type transformer can be prepared according to specific project needs
Manufacturing Process and Testing
Before assembly, incoming materials are inspected according to production requirements. The inspection covers silicon steel cores, conductors, insulation materials and epoxy resin compounds.
After winding production and core assembly, the coils are transferred to the vacuum casting stage. Resin filling, curing temperature and process conditions are controlled during manufacturing to maintain insulation consistency.
Once assembly is completed, each transformer undergoes electrical testing before shipment. Inspection items normally include insulation resistance, winding resistance, voltage ratio and withstand voltage tests.
Test records are prepared together with production documents, providing information for quality review and product traceability.
Technical Information
|
Parameter |
Description |
|
Insulation System |
Epoxy Resin Cast Insulation |
|
Cooling Method |
Natural Air Cooling / Forced Air Cooling |
|
Rated Capacity |
According to Project Requirements |
|
Rated Voltage |
According to Distribution System |
|
Frequency |
50Hz / 60Hz |
|
Installation Type |
Indoor Installation |
|
Applicable Standard |
IEC 60076 |
Frequently Asked Questions
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