Air-insulated dry type
1. Energy saving and reduced consumption: higher energy efficiency during long-term use.
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 and high insulation performance.
4. Weather and moisture resistance: suitable for humid, dusty, coastal and other conditions.
5. Quiet and easy to maintain: low noise, no lubrication required and longer service life.
I. Product Definition and Applicable Standards
Dry transformerThe SCB series, made of epoxy resin, is an energy-saving powertransformer,designed to type 10 standardfor low losses.
It is manufactured using a vacuum epoxy casting process with full encapsulation, is oil-free, fire-resistant, and explosion-proof, eliminating the risk of oil leakage or environmental contamination. It is an ideal alternative to traditional oil-cooled transformers in locations sensitive to fire safety, environmental exposure, and noise.
II. Key technical parameters (customizable)
Element |
Standard Specification |
Notes |
Nominal lifting 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℃) |
Increase in winding temperature by 100 K, core temperature by 80 K |
Degree of protection |
IP20 (default), IP30/IP40 optional |
IP20: For indoor use (clean); IP30: For dust protection; IP40: For outdoor use. |
Environmental conditions |
Altitude ≤1000 m; temperature from -5℃ to +40℃; humidity ≤95%. |
Thermal insulation can be adjusted for use at high altitudes. |
III. Features of the design solution
Optimized kernel
High quality cold rolled high permeability silicon steel (0.30-0.35mm) is used with stepped lap joints at 45° to reduce hysteresis and eddy current losses.
The epoxy coating provides excellent moisture and corrosion protection. Non-magnetic lashing straps reduce vibration and noise.
Advanced winding technology
High voltage winding: oxygen-free copper conductor.
Low-voltage winding: high-precision copper foil. Vacuum-cast epoxy resin 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 Benefits
Oil-free design eliminates the risk of fire, explosion and environmental pollution.
Fire resistance reaches FV0, is self-extinguishing, and produces no toxic gases. It can be installed directly in basements, hospitals, airports, and industrial areas without oil storage facilities or fire compartments.
Increased resistance to weather conditions and environmental pollution.
Fully sealed design: moisture-, dust-, anti-condensation, anti-pollution.
Stable operation in 100% humidity, coastal salt fog, and severe air pollution. No pre-drying required after extended periods of inactivity.
Stable operation and low noise level.
High mechanical strength, excellent resistance to short circuit and shock waves.
Low partial discharge, stable insulation. Noise level: 50–60 dB(A), suitable for residential areas, schools, and hospitals.
It does not require maintenance and has a long service life.
No oil changes or topping up are required; only regular dust cleaning and checking of connections.
Power: 50 kVA-63000 kVA
Adjustable voltage, protection level, and cooling modes. Suitable for indoor and outdoor use in humid, dusty, and coastal conditions.
V. Typical areas of application
Power grids: 35 kV substations, urban/rural grid modernization, step-down substations for industry and mining.
Public buildings: shopping malls, offices, hotels, metro, airports, hospitals, schools.
Specialized industries: chemical areas, coal mines, oil refineries, pharmaceutical industry, coastal areas with high humidity.
Environmentally sensitive areas: residential areas, schools, environmental protection zones.
New energy sources: small and medium-sized photovoltaic power plants, wind farm distribution substations.
