A dry type transformer is an electrical transformer that uses air and solid insulation instead of transformer oil for cooling and insulation. It is widely used in industrial facilities, commercial buildings, data centers, automation systems and electrical equipment.
What Is a Dry Type Transformer?
A dry type transformer transfers electrical energy between circuits through electromagnetic induction. Unlike oil immersed transformers, it does not use liquid oil, making it suitable for many indoor and industrial applications where safety, low maintenance and reliable operation are important.
Common types include three phase dry type transformers, single phase dry type transformers and dry type isolation transformers.
Common Dry Type Transformer Specifications
| Parameter | Typical Range / Option |
|---|---|
| Rated Power | 1 kVA–3000 kVA |
| Phase | Single Phase / Three Phase |
| Input Voltage | 110V–600V |
| Output Voltage | 110V–600V |
| Frequency | 50 Hz / 60 Hz |
| Winding | Copper / Aluminum |
| Insulation Class | Class F / Class H |
| Cooling | AN / AF |
| Connection | Delta / Star |
| Protection | IP20 / IP23 / IP31 |
| Installation | Indoor / Outdoor |
| Standard | IEC 60076 |
Common capacities include 10, 15, 25, 30, 50, 75, 100, 112.5, 150, 200, 250, 300, 400, 500, 630, 800, 1000, 1250, 1600, 2000, 2500 and 3000 kVA.
Voltage configurations can be customized, including 380V/220V, 400V/230V, 400V/400V, 415V/230V, 480V/400V and 600V/400V.
Learn More：Three Phase Isolation Transformer: Applications, Benefits and Industrial Guide
Main Types
Three Phase Dry Type Transformer
Designed for industrial and commercial three phase power systems, these transformers are commonly used in factories, production lines, HVAC systems and power distribution.
Dry Type Isolation Transformer
A dry type isolation transformer provides electrical isolation between the primary and secondary circuits. Typical configurations include 400V/400V and 480V/480V, making them suitable for CNC machines, VFDs, PLCs and sensitive industrial equipment.
Benefits of Dry Type Transformers
- Oil-free and low maintenance
- Suitable for indoor installation
- Reduced risk of oil leakage
- Reliable electrical insulation
- Flexible voltage and kVA configurations
- Suitable for industrial and commercial applications
Common Applications
Dry type transformers are used in:
- Manufacturing plants
- CNC machines
- Automation systems
- Data centers
- HVAC systems
- Solar power systems
- Water treatment
- Mining equipment
- Commercial buildings
- Industrial production lines
Read More：What Is an Automatic Voltage Regulator (AVR)? Working Principle, Benefits and Applications
How to Select a Dry Type Transformer?
When selecting a dry type transformer, consider:
- Rated power (kVA)
- Input and output voltage
- Single phase or three phase
- 50 Hz or 60 Hz frequency
- Load characteristics
- Insulation class
- Cooling method
- Installation environment
- Required IP protection
- Applicable electrical standards
The transformer should be properly sized according to the actual load and future expansion requirements.
Custom Dry Type Transformer Manufacturer
VoltNex Power manufactures custom dry type transformers, dry type isolation transformers and industrial power transformers for different electrical applications.
We support customized kVA ratings, input/output voltages, copper or aluminum windings, insulation classes, cooling methods and enclosure designs.
For a quotation, provide the required kVA, input voltage, output voltage, frequency, phase and installation environment.
Learn More：Industrial Power Quality Problems and Solutions: Transformer, AVR, SVG and AHF
Conclusion
A dry type transformer provides a safe, reliable and low-maintenance solution for industrial power distribution and electrical isolation. With customized voltage, capacity and configuration options, it can be designed for a wide range of industrial equipment and power systems.
