1250kva Epoxy Cast Dry Type Power Transformer with Enclosure
Description about Three Phase Cast Resin Dry Type Transformer
A dry type transformer, also known as an air-cooled transformer, is a type of transformer that utilizes air or gas instead of liquid (such as oil) for insulation and cooling purposes. This transformer design does not immerse its core and windings in insulating oil, making it distinct from oil-filled transformers.

Types of Dry Type Transformers:
- Cast Resin Dry Type Transformer (CRT):
- Uses epoxy resin to encapsulate windings, protecting them from moisture, dust, corrosion, and other environmental factors.
- Suitable for high humidity areas, indoor installations, and fire-risk areas due to its non-hygroscopic, non-inflammable, and maintenance-free nature.
- Available in ratings from 25 kVA to 12,500 kVA, with an insulation class of F (90°C temperature rise).
- Vacuum Pressure Impregnated Transformer (VPI):
- Impregnates windings with class H polyester resin under vacuum and pressure, eliminating air gaps or voids in the insulation.
- Enhances mechanical strength, dielectric strength, and thermal stability.
- Suitable for outdoor installations, seismic events, and temperature fluctuations due to its robust construction, moisture-resistant enclosure, and low thermal expansion coefficient.
Technical Datasheet for Cast Resin Dry Type Transformer
Items | Item |
Origin | China |
Manufacturer | Pearl Electric Co., Ltd. |
Brand | Pearl Electric |
Production Descriptions | Three Phase Cast Resin Dry Type Transformer |
Reference standards | IEC 60076 |
Capacity | 1250KVA or Customized |
Frequency | 60 / 50Hz |
Voltage (HV) | 10kV or Customized |
Voltage (LV) | 0.4kV or Customized |
Impedance | 4%-8% |
Connections (Vector Group) | Dyn11 |
Tapping Range | + 2 x 2.5% , - 2 x 2.5% |
Core materials | Silicon Steel |
Winding materials | Aluminum or copper |
Lightning Impulse Withstand Voltage | IEC standard |
AC withstand voltage | IEC standard |
Temperature Rise class | H-class |
Temperature Rise | 125K |
Cooling method | AN/AF |
Certifications and Test Reports
1. ISO 9001:2015 Quality Management System Certificate2. ISO 14001:2015 Environmental Management System Certificate
3. ISO 45001: 2018 Occupational Health and Safety Management System Certificate
4. CE Certifications for dry type transformer and oil-immersed power transformer
5. KEMA Test Report for Cast Resin Dry Type Transformer and Oil-filled Distribution transformer
6. DEKRA TYTE TEST CERTIFICATES for Prefabricated Substation



★ Oil-immersed Power Transformer Up to 150MVA, 220kV
★ Pad-mounted Transformer Up to 10MVA, 40.5Kv
★ Compact Substation Transformer Up to 10MVA, 40.5kV
Reactors and other power transformation/transmission equipment.



1.Q: Are you manufacturer?
A: Yes, we are manufacturer. Our factory is in Guangzhou City, Guangdong Province.
2.Q: Do you have any Certificate?
A: Yes. Our transformer has awarded CE, UL, KEMA certificate. If you need any other Certificate, we can help you to apply it.
3.Q: How can I pay you?
A: Pay by T/T and L/C is acceptable.
4.Q: What about the production?
A: In general, it take 4~6weeks and it depend on the different style.
5. Q:How contact us to get quick inquiry ? Follow us in our company website.