air-insulated dry type
1. Energy saving and consumption reduction: higher energy efficiency during long-term operation.
2. Safety and fire resistance: oil-free, made of epoxy resin, explosion-proof and environmentally friendly.
3. Stability and reliability: short-circuit resistance, low partial discharge level, and high insulation performance.
4. Weather and moisture resistance: suitable for humid, dusty, coastal, and other environments.
5. Quiet and easy to maintain: low noise, no lubrication required, and longer service life.
I. Product Definition and Applicable Standards
Dry-type transformerThe SCB series, made of epoxy resin, is an energy-saving powertransformer,designed in accordance with the 10-type standardfor low losses.
It is manufactured using vacuum epoxy casting with full sealing, is oil-free, fire-resistant, and explosion-proof, eliminating the risk of oil leakage or environmental pollution. It is an ideal alternative to traditional oil-cooled transformers in locations sensitive to fire safety, environmental impact, and noise.
II. Key Technical Parameters (Customizable)
Element |
Standard Specification |
Notes |
Rated capacity |
50 kVA-63000 kVA |
50 kVA-63000 kVA |
Connection Group |
Dyn11 (default) |
Meets phase and grounding requirements. |
Cooling Mode |
AN / AF |
AN: 120% continuous load; AF: 150% |
Insulation class |
Class F (155℃) |
Winding temperature rise of 100 K, core temperature rise of 80 K |
Protection degree |
IP20 (default), IP30/IP40 optional |
IP20: for indoor use (clean environment); IP30: for dust protection; IP40: for outdoor use. |
Environmental conditions |
Altitude ≤1000 m; temperature from -5℃ to +40℃; humidity ≤95%. |
Insulation can be adjusted for high-altitude use. |
III. Design Features
Optimized core
High-quality cold-rolled high-permeability silicon steel (0.30–0.35 mm) is used with 45° step-lap joints to reduce hysteresis and eddy current losses.
Epoxy coating provides excellent moisture and corrosion protection. Non-magnetic fastening straps reduce vibration and noise.
Advanced winding technology
High-voltage winding: oxygen-free copper conductor.
Low-voltage winding: high-precision copper foil. Vacuum epoxy casting with fiberglass reinforcement, high density, no bubbles or voids. Partial discharge ≤10 pC. High mechanical strength and excellent short-circuit resistance, no cracking or aging during long-term operation.
IV. Key performance advantages
Oil-free design eliminates risks of fire, explosion, and environmental pollution.
Flame retardancy reaches FV0 level, self-extinguishing, no toxic gases. Can be directly installed in basements, hospitals, airports, industrial areas without oil storage or fire compartments.
Enhanced resistance to weather conditions and environmental pollution.
Fully sealed design: moisture-proof, dust-proof, anti-condensation, anti-pollution.
Stable operation at 100% humidity, coastal salt spray, and heavy air pollution. No pre-drying required after prolonged downtime.
Stable operation and low noise level.
High mechanical strength, excellent resistance to short circuits and shock waves.
Low partial discharge level, stable insulation. Noise level: 50–60 dB(A), suitable for residential areas, schools, and hospitals.
Maintenance-free and long service life.
No oil replacement or refilling required; only regular dust cleaning and connection checks.
Power rating: 50 kVA–63000 kVA
Customizable voltage, protection level, and cooling modes. Suitable for indoor, outdoor, humid, dusty, and coastal environments.
V. Typical Application Areas
Power grids: 35 kV substations, urban/rural grid upgrades, step-down substations for industrial and mining industries.
Public buildings: shopping complexes, offices, hotels, subways, airports, hospitals, schools.
Specialized industries: chemical zones, coal mines, oil refineries, pharmaceutical industry, high-humidity coastal areas.
Environmentally sensitive zones: residential areas, schools, environmental protection zones.
New energy sources: small and medium-sized photovoltaic power stations, wind farm distribution substations.
