Cast Resin Dry Type Transformer Product Introduction
High efficiency & low no-load loss
Excellent flame retardant and self-extinguishing performance, oil-free safe operation
Low partial discharge, ultra-low operating noise
Strong short-circuit withstand capability, robust mechanical structure
Good resistance to moisture, dust and chemical contamination
Nearly maintenance-free, long service lifespan
Compact footprint, flexible installation at load side
Compliant with IEC, GB and international safety standards
1. Product Overview
Cast resin dry type transformer is a new-generation environmentally friendly power distribution equipment, adopting vacuum epoxy resin casting and integral curing molding process. Different from traditional oil-immersed transformers, this product completely abandons insulating oil as the cooling and insulating medium, and relies on natural air cooling or forced air cooling for heat dissipation. The primary and secondary windings are fully encapsulated by high-performance epoxy resin, forming an integrated solid insulation structure, which effectively avoids insulation aging, oil leakage, combustion and other hidden dangers existing in traditional transformers.
With outstanding safety stability, low operation loss, strong environmental adaptability and maintenance-free advantages, this series of transformers has become the mainstream choice for indoor power distribution, high-standard industrial and civil power supply scenarios. It can operate stably in complex environments such as high humidity, multi-dust and low temperature, and has a longer service life and lower comprehensive operation cost compared with conventional products, meeting the long-term and reliable power supply needs of various engineering projects.
2. Main Product Technical Parameters
The following are the standard technical parameters of conventional models of cast resin dry type transformers. Special specifications and customized parameters can be adjusted according to actual engineering requirements.
Parameter Item | Standard Technical Data |
Rated Capacity | 50kVA - 5000kVA (customizable up to 25000kVA for special industrial use) |
High Voltage Rated Voltage | ≤36kV (special customized design up to 52kV) |
Low Voltage Rated Voltage | 400V / 415V / 480V / 690V (optional on demand) |
Rated Frequency | 50Hz / 60Hz |
Connection Group | Dyn11 / Yyn0 (optional) |
Impedance Voltage | 4% - 8% (adjustable according to capacity and demand) |
No-load Loss | Low loss design, 20%-30% lower than national standard conventional models |
Load Loss (75℃) | Compliant with IEC and GB standard, low heat generation |
Operating Ambient Temperature | -25℃ ~ +40℃ (24-hour average temperature ≤35℃) |
Relative Humidity | ≤90% (20℃), no additional moisture-proof protection required |
Applicable Altitude | ≤1000m (high altitude customized design available) |
Sound Level | Low noise operation, ≤55dB under rated working condition |
Service Life | More than 30 years under normal operating conditions |
3. Core Product Features
3.1 Excellent Safety Performance
The whole winding is integrally cast with flame-retardant epoxy resin, with self-extinguishing and non-combustible properties. There is no insulating oil inside the equipment, completely eliminating the risk of oil leakage, fire and explosion. The solid insulation structure can effectively resist partial discharge and voltage surge, and will not produce open flame or spread fire even in extreme fault conditions, which meets the highest fire protection standards for indoor power distribution equipment.
3.2 Strong Environmental Adaptability
The fully sealed casting structure isolates the winding from the external air, with excellent dust-proof, moisture-proof and anti-corrosion capabilities. It can operate stably in high humidity, dusty, saline-alkali and other harsh environments without regular oil replacement and sealing maintenance. The product has no volatile pollutants during operation, zero environmental pollution, and is fully compliant with green power construction standards.
3.3 High Efficiency and Energy Saving
Optimized iron core and winding structure design reduces no-load loss and load loss to the greatest extent. The overall power loss is far lower than traditional transformers, which effectively reduces long-term power consumption and operation costs. The operation is stable with low heat generation, and the temperature rise is controlled within a safe range under full-load operation, ensuring efficient and energy-saving operation for a long time.
3.4 Stable and Reliable Operation
The integral casting process makes the winding have strong structural rigidity, which can resist mechanical vibration and short-circuit impact effectively. It is not easy to crack or deform during long-term operation, with strong anti-interference ability and stable output voltage. The product has low failure rate and strong operation stability, avoiding frequent shutdown maintenance caused by equipment failure.
3.5 Low Noise and Compact Structure
Optimized magnetic circuit and vibration reduction design effectively reduce operating noise, meeting the noise control requirements of residential, commercial and medical scenarios. The overall structure is compact, small in floor space, no need for special fireproof oil pool and oil storage facilities, which saves equipment room construction space and reduces project investment cost.
4. Application Scenarios
Due to its high safety, environmental protection and high stability, cast resin dry type transformers are widely used in key power supply scenarios with high requirements for safety, environmental protection and continuous power supply, mainly covering the following fields:
• Commercial and Civil Buildings: Shopping malls, office buildings, hotels, residential communities, exhibition centers and other indoor power distribution systems, adapting to urban green and safe power supply requirements.
• Public Infrastructure: Hospitals, schools, subway stations, airports, railway stations and other public places, ensuring continuous and safe power supply for public facilities.
• Industrial Manufacturing: Precision manufacturing workshops, electronic factories, chemical plants, food processing plants and other industrial sites, adapting to harsh factory environment and stable industrial power demand.
• New Energy Industry: Solar power stations, wind power stations, energy storage power stations and other new energy power generation and power distribution systems, matching the efficient and green operation of new energy equipment.
• Data and Communication Industry: Data centers, communication machine rooms, cloud computing bases and other key scenarios that require uninterrupted power supply, avoiding power failure and equipment damage caused by transformer faults.
• Special Engineering Scenarios: Underground pipe corridors, indoor substations, high-rise buildings, petrochemical and other flammable and explosive places, solving the safety pain points of traditional oil-immersed transformers.
5. Product Maintenance and After-Sales Service
5.1 Daily Maintenance Instructions
This series of products is designed with low maintenance, and no complex daily maintenance is required during normal operation. Regular visual inspection and simple cleaning can meet the operation requirements. It is recommended to regularly check the equipment surface for dust accumulation, damage and abnormal noise, and clean the surface dust with dry compressed air to ensure good heat dissipation. For the equipment equipped with temperature control and temperature measurement system, regularly check the normal operation of the monitoring system and fan heat dissipation device. Long-term overload operation is prohibited to avoid equipment aging acceleration.
In high humidity and rainy seasons, regular inspection of insulation resistance is recommended to ensure the insulation performance of the winding is within the standard range. If the equipment is shut down for a long time, it is necessary to check and dry the insulation before re-operation to ensure safe startup.
5.2 After-Sales Service Guarantee
We provide full-cycle professional after-sales support for all cast resin dry type transformers. The product enjoys a standard warranty period, with free maintenance and replacement of faulty parts caused by non-human factors during the warranty period. Our professional technical team provides 24-hour online technical consultation and fault response service to quickly solve equipment operation problems for customers.
We support on-site installation guidance, commissioning and regular after-sales inspection services. For equipment failures, we provide targeted fault analysis, maintenance solutions and technical guidance to ensure the long-term stable operation of the equipment. At the same time, we provide lifelong technical support and spare parts supply service for all sold products, eliminating customers' after-sales worries.
