Your Trusted Partner - OMEK Dry Type Transformer Manufacturer
Jinan Omek Electric Power Co., Ltd. (OMEK Power) is a leading dry type transformer manufacturer in China.We have Indonesia branch and Assembly plants in Ethiopia.We have 17 years engineering expertise in the transformer industry. Each of our dry type transformer unit performs well even under the most demanding conditions.
We have successfully obtained certifications such as ISO9001, ISO14001, ISO45001, CE, CCC, CQC, and ASTA, etc. We can design transformers that meet international performance and safety standards.
Our products serve a wide range of sectors – utilities, renewable energy, transportation, mining, and critical infrastructure. When performance cannot be compromised, engineers and project managers turn to OMEK Power as a partner they can rely on!
Our Dry Type Transformer Ranges
As a professional China dry type transformer manufacturer, we supply both step-down and step-up transformers, in both single-phase and three-phase designs. Below are our dry type transformer rated capacities.
| Phases | Customer Frequently Bought kVAs |
| Single phase/three phase | 30 , 45, 50, 63, 75, 100, 112.5, 150, 200, 225, 250 kVA transformers |
| Three phase | 300, 315, 500, 630, 750, 1000, 1250, 1500 kVAs |
| Three phase | 1600, 2000, 2500, 3000+ kVAs |
This comprehensive rating range allows us to support industrial, commercial, and utility-grade applications with reliable and customizable dry transformer solutions.
OMEK™ Dry Type Transformer Types
Let’s explore our core technologies below. They are categorized by their insulation process.
Cast Resin Dry-Type Transformer
Key Features:
✅ Fully encapsulated. Its windings are completely sealed in solid epoxy resin.
✅ This cast resin dry type transformer has integrated insulation & cooling system.
✅ Almost maintenance-free. It is immune to moisture and dust. Suitable for harsh indoor conditions.
Advantages:
✅ Superior durability. Withstand corrosive and polluted atmospheres.
✅ The most important feature – safe! It is flame retardant and explosion proof.
✅ It is operated quitely. Its solid construction effectively dampens audible noise.
✅ It is very eco-friendly. It contains no oil or toxic.
VPI Dry-Type Transformer
VPI Dry Type Transformer Features:
✅ It is vacuum pressure impregnated. Its windings are deeply infused with insulating varnish.
✅ Open ventilated design. Optimized air channels allow for maximum heat dissipation.
Advantages:
✅ Exceptional thermal performance. Its direct air cooling enables higher overload capacity.
✅ It has stronger protective ability. Its robust varnish shield we designed can resist humidity and contamination.
✅ Cost effectiveness is another benefit for you. It delivers good balance of performance and price.
Vacuum Pressure Encapsulated (VPE) Transformer
Features:
✅ Our VPE transformer is an advanced evolution of our VPI transformer. It utilizes high-temperature, Class C insulation materials.
✅ It has multi-layer sealing. Our advanced process makes sure it is near-hermetic protection.
Advantages:
✅ Extreme environment rated. It is engineered for high humidity, altitude, and salt fog.
✅ Its ultra-slow insulation aging extends its service life.
✅ It also possesses stronger endurance. That makes it excel in mechanical shock and electrical stress resistance.
Open-Wound Dry-Type Transformer
Features:
✅ Simplified construction. Compared with the VPE type, its windings are coated but not fully encapsulated.
✅ It has maximum airflow. A well-ventilated passage can effectively cool down.
Advantages:
✅ It has optimal heat dissipation. It can operate at the lowest temperature under ideal conditions.
✅ Another advantage is its minimal initial cost. It is the most economical choice for specialized installations.
✅ You will have easy inspection & maintenance access.
Dry Type Transformer Specification
As a China dry type transformer supplier with 16 years of industry experience, OMEK Power manufactures a complete range of products covering SCB10/11/12/13 cast resin 3D core transformers, SCBH15/17/19 amorphous alloy dry type distribution transformers, and the SCB10-RL to SCB18-RL series of CRGO 3D core dry transformers.
Rated capacity: 30kva – 2500kva
High voltage: 6, 6.3, 6.6, 10, 10.5, 11, 20, 22, 24, 33, 35, 36, 37, 38.5 (customizable)
Secondary voltage: 200V, 208V, 400V, 415V, 480V (customizable)
Connected group label: Dyn11, Yyn0
Phase: 3 phase
Core: Silicon steel or amorphous alloys (per your needs)
Winding: Copper foil or aluminum foil cast coil (per your needs)
Insulating and cooling media: air
Cooling method: ANAN/ANAF/AFAF
Energy efficiency grade: 1st level, 2nd level, 3rd level (per your needs)
Standard compliance: IEC 60071, IEC 60076, IEC 60137, IEC 60214, IEC 60296, IEC 60317-0-1-2013, etc.
Certificate and standards: CE, ISO 9001, ISO 14001, ISO 45001, ASTA, UL, VDE, etc.
Specification
- Cast Resin
- Amorphous Alloy
- CRGO 3D Core
SCB10-(30-2500)/10
SCB10-(30-2500)/10 3 phase Dry type distribution transformer
| Rated capacity(kVA) | Voltage combination | Connected group label | No-load loss (W) | Load loss (75°C)(W) | No-load current (%) | Impe-dance voltage（%） | Sound Level(dB) | Overall dimension(L×w×h) | Total weight (kg) | ||||
| High voltage (kV) | Tap range | Low Voltage (kV) | 130°C(B) | 155°C(F) | 180°C(H) | ||||||||
| 100°C | 120°C | 145°C | |||||||||||
| 30 | 6 6.3 6.6 10 10.5 11 | ±2×2.5 ±5 | 0.4 | Dyn11 | 190 | 670 | 710 | 760 | 0.6 | 4 | 57 | 900×900×800 | 300 |
| 50 | 270 | 940 | 1000 | 1070 | 0.6 | 955×900×900 | 350 | ||||||
| 80 | 370 | 1290 | 1380 | 1480 | 0.6 | 58 | 985×950×960 | 400 | |||||
| 100 | 400 | 1480 | 1570 | 1690 | 0.6 | 1035 × 1250×980 | 450 | ||||||
| 125 | 470 | 1740 | 1850 | 1980 | 0.6 | 59 | 1060×1280×1000 | 500 | |||||
| 160 | 540 | 2000 | 2130 | 2280 | 0.6 | 1120×1320×1050 | 680 | ||||||
| 200 | 620 | 2370 | 2530 | 2710 | 0.5 | 60 | 1135×1330×1105 | 770 | |||||
| 250 | 720 | 2590 | 2760 | 2960 | 0.5 | 1170×1330×1165 | 900 | ||||||
| 315 | 880 | 3270 | 3470 | 3730 | 0.5 | 62 | 1185×1360×1225 | 1010 | |||||
| 400 | 980 | 3750 | 3990 | 4280 | 0.4 | 1210×1380×1300 | 1205 | ||||||
| 500 | 1160 | 4590 | 4880 | 5230 | 0.4 | 63 | 1245×1400×1380 | 1400 | |||||
| 630 | 1340 | 5530 | 5880 | 6290 | 0.4 | 1295×1410×1355 | 1515 | ||||||
| 630 | 1300 | 5610 | 5960 | 6400 | 0.3 | 1295×1410×1355 | 1515 | ||||||
| 800 | 1520 | 6550 | 6960 | 7460 | 0.3 | 65 | 1375×1450×1480 | 1880 | |||||
| 1000 | 1770 | 7650 | 8130 | 8760 | 0.3 | 1430×1480×1525 | 2170 | ||||||
| 1250 | 2090 | 9100 | 9690 | 10370 | 0.25 | 67 | 1480×1500×1570 | 2525 | |||||
| 1600 | 2450 | 11050 | 11730 | 12580 | 0.25 | 1500×1520×1710 | 2980 | ||||||
| 2000 | 3050 | 13600 | 14450 | 15560 | 0.2 | 69 | 1570×1550×1735 | 3480 | |||||
| 2500 | 3600 | 16150 | 17170 | 18450 | 0.2 | 1625×1600×1825 | 4080 | ||||||
| 1600 | 2450 | 12200 | 12900 | 13900 | 0.25 | 8 | 67 | 1500×1520×1710 | 2980 | ||||
| 2000 | 3050 | 15000 | 15900 | 17100 | 0.2 | 69 | 1570×1550×1735 | 3480 | |||||
| 2500 | 3600 | 17700 | 18800 | 20200 | 0.2 | 1625×1600×1825 | 4080 | ||||||
SCBH19-(30-2500)/10
SCBH19-(30-2500)/10 3 phase Dry type amorphous alloy iron core distribution transformer
| Rated capacity(kVA) | Voltage combination | Connected group label | No-load loss (W) | Load loss (75°C)(W) | No-load current (%) | Impe-dance voltage（%） | Sound Level(dB) | Overall dimension(L×w×h) | Total weight (kg) | ||||
| High voltage (kV) | Tap range | Low Voltage (kV) | 130°C(B) | 155°C(F) | 180°C(H) | ||||||||
| 100°C | 120°C | 145°C | |||||||||||
| 30 | 6 6.3 6.6 10 10.5 11 | ±2×2.5 ±5 | 0.4 | Dyn11 | 50 | 605 | 640 | 685 | 0.6 | 4 | 63 | 900×900×800 | 300 |
| 50 | 60 | 845 | 900 | 965 | 0.5 | 955×900×900 | 350 | ||||||
| 80 | 85 | 1160 | 1240 | 1330 | 65 | 985×950×960 | 400 | ||||||
| 100 | 90 | 1330 | 1415 | 1500 | 1035 × 1250×980 | 450 | |||||||
| 125 | 105 | 1565 | 1665 | 1780 | 0.4 | 66 | 1060×1280×1000 | 500 | |||||
| 160 | 120 | 1800 | 1915 | 2050 | 1120×1320×1050 | 680 | |||||||
| 200 | 140 | 2135 | 2275 | 2440 | 67 | 1135×1330×1105 | 770 | ||||||
| 250 | 160 | 2330 | 2485 | 2665 | 1170×1330×1165 | 900 | |||||||
| 315 | 195 | 2945 | 3125 | 3355 | 0.3 | 69 | 1185×1360×1225 | 1010 | |||||
| 400 | 215 | 3375 | 3590 | 3850 | 1210×1380×1300 | 1205 | |||||||
| 500 | 250 | 4130 | 4390 | 4705 | 70 | 1245×1400×1380 | 1400 | ||||||
| 630 | 295 | 4975 | 5290 | 5660 | 71 | 1295×1410×1355 | 1515 | ||||||
| 630 | 290 | 5050 | 5365 | 5760 | 0.3 | 6 | 71 | 1295×1410×1355 | 1515 | ||||
| 800 | 335 | 5895 | 6265 | 6715 | 71 | 1375×1450×1480 | 1880 | ||||||
| 1000 | 385 | 6885 | 7315 | 7885 | 0.2 | 1430×1480×1525 | 2170 | ||||||
| 1250 | 455 | 8190 | 8720 | 9335 | 74 | 1480×1500×1570 | 2525 | ||||||
| 1600 | 530 | 9945 | 10555 | 11320 | 75 | 1500×1520×1710 | 2980 | ||||||
| 2000 | 700 | 12240 | 13005 | 14005 | 77 | 1570×1550×1735 | 3480 | ||||||
| 2500 | 840 | 14535 | 15445 | 16605 | 78 | 1625×1600×1825 | 4080 | ||||||
SCB18-RL-(30-2500)/10
SCB18-RL-(30-2500)/10 3 phase dry type 3D core distribution transformer
| Rated capacity(kVA) | Voltage combination | Connected group label | No-load loss (W) | Load loss (75°C)(W) | No-load current (%) | Impe-dance voltage（%） | Sound Level(dB) | Overall dimension(L×w×h) | Total weight (kg) | ||||
| High voltage (kV) | Tap range | Low Voltage (kV) | 130°C(B) | 155°C(F) | 180°C(H) | ||||||||
| 100°C | 120°C | 145°C | |||||||||||
| 30 | 6 6.3 6.6 10 10.5 11 | ±2×2.5 ±5 | 0.4 | Dyn11 | 105 | 605 | 640 | 685 | 0.6 | 4 | 57 | 955×1100×840 | 360 |
| 50 | 155 | 845 | 900 | 965 | 0.6 | 970×1120×860 | 420 | ||||||
| 80 | 210 | 1160 | 1240 | 1330 | 0.6 | 58 | 1015×1150×925 | 460 | |||||
| 100 | 230 | 1330 | 1415 | 1520 | 0.6 | 1060×1210×960 | 560 | ||||||
| 125 | 270 | 1565 | 1665 | 1780 | 0.6 | 59 | 1075×1230×1000 | 630 | |||||
| 160 | 310 | 1800 | 1915 | 2050 | 0.6 | 1105×1260×1045 | 770 | ||||||
| 200 | 360 | 2135 | 2275 | 2440 | 0.5 | 60 | 1120×1270×1105 | 875 | |||||
| 250 | 415 | 2330 | 2485 | 2665 | 0.5 | 1195×1350×1125 | 1055 | ||||||
| 315 | 540 | 2945 | 3125 | 3355 | 0.5 | 62 | 1225×1380×1140 | 1190 | |||||
| 400 | 570 | 3375 | 3590 | 3850 | 0.4 | 1315×1470×1190 | 1500 | ||||||
| 500 | 670 | 4130 | 4390 | 4705 | 0.4 | 63 | 1345×1500×1265 | 1700 | |||||
| 630 | 775 | 4975 | 5290 | 5660 | 0.4 | 63 | 1555×1700×1175 | 1985 | |||||
| 630 | 750 | 5050 | 5365 | 5760 | 0.3 | 6 | 63 | 1555×1700×1175 | 1985 | ||||
| 800 | 875 | 5895 | 6265 | 6715 | 0.3 | 65 | 1600×1750×1220 | 2360 | |||||
| 1000 | 1020 | 6885 | 7315 | 7885 | 0.3 | 1660×1810×1285 | 2775 | ||||||
| 1250 | 1205 | 8190 | 8720 | 9335 | 0.25 | 67 | 1720×1870×1350 | 3310 | |||||
| 1600 | 1415 | 9945 | 10555 | 11320 | 0.25 | 67 | 1780×1930×1405 | 3940 | |||||
| 2000 | 1760 | 12240 | 13005 | 14005 | 0.2 | 69 | 1840×1990×1475 | 4595 | |||||
| 2500 | 2080 | 14535 | 15445 | 16605 | 0.2 | 69 | 1900×2050×1565 | 5495 | |||||
Key Advantages/Features of dry type transformer
Why OMEK Power?
Pouring and Molding Technology
OMEK Power’s casting and molding process combines fully automated precision dosing (±0.1%), vacuum casting with ultrasonic monitoring, and intelligent step-curing to ensure consistent quality. With additional 3D laser scanning and comprehensive electrical and mechanical performance testing, our process guarantees an insulation system with high reliability, excellent dielectric strength, and long-term stability.
Dry Type Transformer Testings
OMEK Power, a trusted dry type transformer supplier. We make sure every transformer meets strict performance and safety standards. We conduct key tests. They are dry type transformer insulation resistance testing and power factor testing for dry type transformers. These tests are to verify insulation health and overall reliability.
Our Powerful and Customized Dry Type Distribution Transformer Solutions
Choosing a dry-type transformer is not merely a decision about purchasing a single piece of equipment; it is a crucial factor determining whether the entire system can operate continuously, stably and efficiently.
We are fully aware that – the scorching workshops, unstable voltage in the factory area, the precious and limited space of the power distribution room, and the increasingly strict energy-saving targets… Each project has its own challenges. Therefore, we have prepared nine targeted solutions to help you overcome your difficulties.
Heat Dissipation & Temperature Rise
- Overvoltage & Surge Protection
- Voltage Stabilization (OLTC)
- Low-Voltage Distribution
- Dry Type Substation Transformer
- High-Efficiency Autotransformer
- Amorphous Alloy Energy Saving
- Isolation for Sensitive Loads
- Underground Landscape Substation
Get A Quote
Facing unique challenges in your power system? Contact our engineering team now! We can provide you with a free, tailored analysis and a customized transformer solution. Don’t let your problem wait so long! Our team will provide the solution within 30 minutes during business hours.
Dry Type Power Transformer Components
Dry Type Transformer Applications
As a professional transformer manufacturer in China, our air insulated dry type transformers are widely used in the following key locations and facilities:
Commercial & Public Buildings
Industrial & Infrastructure
Transportation & Energy
Data & Precision Facilities
- Office Buildings
- Shopping Malls
- Hotels
- Hospitals
- Schools
- Airports
- Mines
- Tunnels
- Shipbuilding
- Sewage Treatment Plants
- Subways
- Light Rail
- High-Speed Railway Stations &Tunnels
- Highways
- Ports
- Wind Farms
- Solar Power Plants
- Data Centers
- Communication Hubs
- Bank Data Centers
- Semiconductor Factories
- Precision Laboratories
Dry Type Transformer Service/Maintenance
Do you want your dry-type transformer to keep working steadily and last longer? OMEK Electric provides you with regular overseas inspections & maintenance
The inspection plan can be customized for us – on a quarterly basis, or annually, or according to your industry (such as in the fields of new energy or mining) and the working environment of the equipment (special conditions like high temperature and high altitude). It can also be adjusted specifically based on your needs.
Professional engineers will come to your site to measure the core parameters and will guide you step by step on how to operate it on-site.
If there is any problem with the equipment, our senior engineers can arrive at the site to handle it within 48 hours.
OMEK Power Company Warranty
Free replacement of core components during the warranty period. If the problem is due to the quality of the product itself and causes damage to key components such as iron cores and windings, we will send new components to you via international air freight within 72 hours and will also guide you on how to replace them. If it’s beyond the warranty period, don’t worry, we will sell the original parts to you at cost price.
Customized for you No matter which country you are in, we can provide you with customized remote services. On one hand, we will teach you the working principle of the transformer, daily operations, and how to troubleshoot common faults; on the other hand, during the equipment installation process, we can also provide real-time online guidance to help you complete the installation smoothly.
Related Offerings
FAQ
Have any questions? We’re here to help you out.
A dry type transformer is a basic type of power transformer. It does not use oil for insulation or cooling. Instead of being immersed in insulating oil, its core and windings are insulated and cooled by air. It is either natural air flow or forced-air ventilation. Solid insulation materials such as epoxy resin or varnish-impregnated paper are used to protect the windings and provide electrical insulation.
Dry type transformers have strong safety performance and environmental friendliness. A dry type transformer is widely used in locations with strict fire-safety and pollution-control requirements. For example, in factories, high-rise buildings, subways, airports, ports, and offshore facilities. In these settings, it is often combined with high- and low-voltage switchgear to use. They can form a compact indoor substation that is easy to install and maintain.
Dry type transformers and oil filled transformers have differences in safety, capacity and voltage range, maintenance needs, and applicable installation environments.
| Item | Dry Type Transformer | Oil-Filled Transformer |
| Insulation & Cooling Medium | Uses air and solid insulation (such as epoxy resin); operates without oil. | uses oil for insulation and cooling. |
| Safety & Environmental Impact | It is non‑flammable and does not leak, making it suitable for fire‑sensitive areas. | Possible oil leakage, fire, and explosion risks; requires oil pits and safety protection. |
| Capacity & Voltage Levels | Standard capacities reach up to 2,000–2,500 kVA, while voltage levels are usually below 10 kV; some models reach 35 kV. | Capacity ranges from very small to ultra-large; extra‑high voltages exceeding 1000 kV. |
| Overload & Heat Dissipation | Air cooling is less efficient; long-term overload capability is limited and depends on ventilation conditions. | excellent cooling performance, manage overload effectively, withstands intense short‑circuit forces |
| Initial Cost & Maintenance | Although the purchase price is higher, it eliminates oil testing and replacement and simplifies daily upkeep. | The oil‑filled option is cheaper up front but requires regular oil testing and higher ongoing maintenance. |
| Installation & Space | installed indoors near the load without oil pits. | requires a transformer room or outdoor oil containment. |
| Noise & Environmental Adaptability | Choose dry‑type for indoor, people‑intensive sites where oil pits or fire‑separation rooms are impractical | choose oil‑filled for outdoor, humid or harsh environments that require greater moisture tolerance. |
If used properly, a dry-type transformer can last for 25 to 30 years. The exact duration depends on several factors: the temperature during operation of the equipment, the size of the load it carries, the humidity of the environment, and whether regular maintenance is carried out.
If you keep your transformer cool and operate within the rated load range, and conduct regular inspections and maintenance, it can be used even longer.
A dry type transformer is made up of several components. These are core, windings, support structure, accessories, and an enclosure.
The core can be stacked steel or amorphous alloy. The copper or aluminum windings handle voltage conversion. Epoxy, varnish, pads, clamps and bolts insulate and secure the windings and core. Other accessories are cooling vents, fans, sensors, terminals, and protective casing ensure safe operation and easy monitoring.
Transformers of different kVA ratings have corresponding sizes. Here are the sizes for various kVA models in our Amorphous Alloy Series.
| kVA | Overall Dimension – L×W×H | Total Weight |
| 30 | 900 × 900 × 800 | 300 |
| 50 | 955 × 900 × 900 | 350 |
| 80 | 985 × 950 × 960 | 400 |
| 100 | 1035 × 1250 × 980 | 450 |
| 125 | 1060 × 1280 × 1000 | 500 |
| 160 | 1120 × 1320 × 1050 | 680 |
| 200 | 1135 × 1330 × 1105 | 770 |
| 250 | 1170 × 1330 × 1165 | 900 |
| 315 | 1185 × 1360 × 1225 | 1010 |
| 400 | 1210 × 1380 × 1300 | 1205 |
| 500 | 1245 × 1400 × 1380 | 1400 |
| 630 | 1295 × 1410 × 1355 | 1515 |
| 800 | 1375 × 1450 × 1480 | 1880 |
| 1000 | 1430 × 1480 × 1525 | 2170 |
| 1250 | 1480 × 1500 × 1570 | 2525 |
| 1600 | 1500 × 1520 × 1710 | 2980 |
| 2000 | 1570 × 1550 × 1735 | 3480 |
| 2500 | 1625 × 1600 × 1825 | 4080 |
Dry type transformers require minimal maintenance. But essential maintenance should be conducted. It should be focusing on temperature control, dust and moisture prevention, and tight connections.
Key daily maintenance points:
OMEK experts recommend that regularly check thermostats and room thermometers. If you find the temperature rises, it’s time to inspect the load and cooling fans.
Use dry compressed air from the bottom up to remove dust from coils and the core, and ensure adequate ventilation to prevent moisture and corrosive gases.
Listen for unusual sounds or odors during operation and investigate any that occur immediately.
A cast resin transformer is a dry-type transformer. Dry type transformer refers to any transformer that does not rely on insulating liquid (e.g., oil). Among various dry-type technologies, the cast resin design is characterized by its unique construction. The windings are completely cast in a solid epoxy resin block under vacuum. Providing superior environmental protection and mechanical strength. Other dry-type designs, like vacuum pressure impregnated (VPI) transformers, use different insulation methods.