China-based dry type transformer manufacturer with 20+ years of engineering excellence. Factory-direct wholesale pricing on 50 kVA – 3150 kVA units. OEM/ODM customization for distributors, contractors, and EPC projects worldwide. We provide industrial-grade solutions for power distribution, equipment integration, and customized electrical systems. The key selection factors usually include rating, voltage class, cooling method, insulation system, dimensions, and test documentation.
Dry type transformers use air instead of liquid as the cooling medium, and they are widely chosen for indoor power distribution where clean operation, lower fire risk, and reduced maintenance are important. The voltage can be interchanged between 10kV and 20kV,and the technical parameters comply with the standards of 20kV class.
All units comply with IEC 60076-11. Custom voltage ratings, tap ranges, and enclosure types available on request. We support OEM/ODM production, export trade requirements, and project-based customization for voltage, kVA rating, enclosure, wiring method, and installation conditions.
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A dry-type transformer is a transformer that uses no liquid insulating medium; its insulation and cooling rely mainly on air. Common types include resin cast transformers and open-type transformers. These are widely used in locations requiring high safety and environmental protection, such as large commercial buildings, subway systems, and hospitals.
Dry type Transformer are indispensable devices in power systems, responsible for the transmission and transformation of electrical energy. Among various types, dry type and oil-immersed transformer are the most common. With increasing industrial safety and environmental standards, dry-type transformers have become a focus for B2B customers due to their unique advantages.
Dry Type Transformer products are designed for reliable indoor and industrial power distribution. As a manufacturer and exporter in China, we support standard models and custom-built solutions for panel builders, machinery makers, EPC contractors, and overseas distributors. Unlike traditional oil-filled units, a dry-type transformer operates without liquid insulation, making it safer, environmentally friendly, and easier to maintain. This makes it the preferred solution for projects where fire resistance, moisture protection, and reduced maintenance are critical.
✅Safety First: Oil-free design eliminates oil leakage and fire risks.
✅Low Maintenance: No need for oil replacement or complex upkeep.
✅Environmentally Friendly: No oil pollution, meets green building requirements.
✅Reliable and Durable: resistant to humidity, dust, and corrosive environments. Strong resistance to shocks and moisture, with a long lifespan.
✅Flexible: available in multiple voltage levels for medium- and low-voltage applications.
✅Certified quality: all units comply with IEC, CE, and ISO standards.
| Rated Capacity (kVA) | L | W | H | D | A | |
| 50 | 1180 | 750 | 1010 | 820 | 820 | |
| 100 | 1210 | 780 | 1060 | 820 | 820 | |
| 160 | 1260 | 800 | 1100 | 820 | 820 | |
| 200 | 1310 | 840 | 1100 | 820 | 820 | |
| 250 | 1370 | 880 | 1170 | 820 | 820 | |
| 315 | 1420 | 880 | 1230 | 820 | 820 | |
| 400 | 1450 | 910 | 1280 | 820 | 820 | |
| 500 | 1470 | 910 | 1380 | 820 | 820 | |
| 630 | 1545 | 950 | 1495 | 820 | 820 | |
| 800 | 1600 | 980 | 1560 | 820 | 820 | |
| 1000 | 1620 | 1050 | 1560 | 950 | 820 | |
| 1250 | 1760 | 1050 | 1560 | 950 | 820 | |
| 1600 | 1800 | 1070 | 1660 | 950 | 820 | |
| 2000 | 1840 | 1100 | 1710 | 1070 | 950 | |
| 2500 | 1900 | 1160 | 1880 | 1070 | 1070 | |
| 3150 | 1980 | 1240 | 1920 | 1070 | 1070 | |
| Note:As product dimensions may be continuously improved,the outline dimensions provided in this sample are for reference only.For special dimensions,we can design and manufacture according to user requirements.Please contact our company in a timely manner! The voltage can be interchanged between 20kV and 10kV,and the technical parameters comply with the standards of 20kV class. | ||||||
| Rated high voltage:20kV Rated low voltage:0.4kV | Connection Group:Dyn11 or Yyn0 | |||||||||
| Insulation Level:L1125AC50/L10AC3 | ||||||||||
| High voltage tapping range:±5%or 2×2.5% | ||||||||||
| Rated Capacity (KVA) | Voltage Combination(kV) | Connection Group Designation | No-load Loss(kW) | Load Losses(kW)under Different Insulation Temperature Resistance Grades | No-load Current % | Short-circuit Impedance UK(%) | ||||
| High Voltage | High voltage tapping range | Low Voltage | B(100℃) | F(120℃) | H(145℃) | |||||
| 50 | 20 22 24 | ±5 ±2×2.5 | 0.4 | Dyn11 Yyn0 | 0.380 | 1.230 | 1.300 | 1.390 | 2.4 | 6.0 |
| 100 | 0.600 | 1.980 | 2.100 | 2.250 | 1.8 | |||||
| 160 | 0.750 | 2.470 | 2.600 | 2.800 | 1.8 | |||||
| 200 | 0.820 | 2.950 | 3.100 | 3.310 | 1.6 | |||||
| 250 | 0.940 | 3.440 | 3.500 | 3.910 | 1.5 | |||||
| 315 | 1.080 | 4.100 | 4.300 | 4.600 | 1.4 | |||||
| 400 | 1.280 | 4.900 | 5.100 | 5.460 | 1.4 | |||||
| 500 | 1.500 | 5.800 | 6.100 | 6.500 | 1.2 | |||||
| 630 | 1.700 | 6.880 | 7.200 | 7.750 | 1.2 | |||||
| 800 | 1.950 | 8.230 | 8.700 | 9.300 | 1.2 | |||||
| 1000 | 2.300 | 9.720 | 10.300 | 11.000 | 1.0 | |||||
| 1250 | 2.650 | 11.500 | 12.150 | 13.000 | 1.0 | |||||
| 1600 | 3.100 | 13.780 | 14.600 | 15.650 | 1.0 | |||||
| 2000 | 3.600 | 16.300 | 17.250 | 18.500 | 0.8 | |||||
| 2500 | 4.300 | 19.350 | 20.400 | 21.800 | 0.8 | |||||
| 2000 | 3.600 | 17.800 | 18.800 | 20.000 | 0.8 | 8.0 | ||||
| 2500 | 4.300 | 21.300 | 22.400 | 23.900 | 0.8 | |||||
| Note:The load losses listed in the table are values at the reference temperature in parentheses(as specified in GB1094.11). | ||||||||||
From commercial high-rises to offshore platforms, our dry type transformers are trusted in over 50 countries across 6 key industries.
Installing a dry type transformer is straightforward. Position the unit on a level foundation, ensure proper ventilation, and connect according to the wiring diagram provided. Since these transformers are virtually maintenance-free, routine checks focus on:
Calculate the total connected load. Add a 20-30% future expansion margin. Common reference:
Cast Resin (SCB series) :
VPI:
Cooling:
By reviewing these technical and commercial factors systematically, buyers can select a dry-type transformer that matches the electrical system, installation environment, operating conditions, and long-term project requirements.
Use this quick selection guide, or contact our engineers for a free consultation.
HAIRUI position ourselves as a China factory and dry type transformer manufacturer focused on B2B supply, export cooperation, and customization. Our advanced dry type distribution transformers come in various power ratings and configurations, ensuring compatibility with diverse applications across multiple industries.
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In addition to standard components, we are a leading manufacturer of custom switchgear. With extensive experience and expertise, we deliver the ideal switchgear solution for your project. Our engineering team can design and build custom switch cabinets tailored precisely to your specifications.
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A dry type transformer is an air-cooled transformer that does not use liquid insulation, and it is commonly selected for indoor installations where cleaner operation and lower fire risk are preferred.
Yes. Engineering buyers usually need a dry type transformer PDF that includes rating, voltage ratio, dimensions, weight, cable data, and other specification items for internal review and approval.
Project specifications commonly require technical items such as efficiency, regulation, insulation-related data, cable rating, dimensions, and other rated parameters to be documented for review. The exact testing scope should match the project specification, destination market, and customer agreement.
Yes. A practical dry-type transformer chart should compare kVA rating, primary and secondary voltage, cooling type, insulation class, and dimensions because those are core selection fields in dry type transformer specifications.
Dry-type transformer ratings are usually centered on kVA, voltage class, cooling method, insulation class, and temperature rise. For larger projects, buyers may also review impedance, enclosure style, and installation layout during model selection.
Yes. Dry type distribution transformers are widely used in commercial and industrial power distribution, including data centers, renewable energy installations, and substations.