SCBH15 Series Amorphous Alloy Core Cast Resin Dry-Type Distribution Transformer
The GOHO SCBH15 series is a high-efficiency, three-phase cast resin dry-type distribution transformer built around an advanced amorphous alloy core. Unlike conventional grain-oriented silicon steel (CRGO) cores, the iron-based amorphous alloy core is produced by ultra-rapid solidification of molten metal, giving it a non-crystalline atomic structure with exceptionally low coercivity and hysteresis loss. The result is a transformer whose no-load losses are 60–80% lower than equivalent SCB10/SCB11 silicon-steel designs, making it ideal for energy-saving and green-building projects.
The transformer features class-F or class-H insulation with vacuum-cast epoxy resin, making it naturally flame-retardant, self-extinguishing and maintenance-free. The dry-type design eliminates the risk of oil leakage and fire, allowing safe installation in commercial buildings, industrial plants, basements and any location with strict environmental or fire-safety requirements.
With a capacity range of 100–2500 kVA, primary voltage 10 kV and secondary voltage 0.4 kV, the SCBH15 is particularly suited to distribution networks with significant load fluctuation, light-load or no-load operating periods, and any project where long-term energy savings outweigh the initial investment.
Model Comparison
| Attribute | SCBH15 | Conventional SCB10 / SCB11 |
|---|---|---|
| Core Material | Amorphous alloy (Fe-based metallic glass) | Grain-oriented silicon steel (CRGO) |
| No-Load Loss | 60–80% lower than CRGO | Baseline |
| Load Loss | Comparable | Comparable |
| Insulation Class | Class F / Class H | Class F / Class H |
| Cooling | AN (Air Natural) — optional AF | AN (Air Natural) — optional AF |
| Best For | High energy-cost areas, light/no-load operation | Standard indoor distribution |
* Exact loss values follow GB/T 1094.12 / GB 20052-2020; contact us for the type-test report of your required capacity.
Technical Specifications
| Item | Specification |
|---|---|
| Model | SCBH15-100~2500/10 |
| Rated Capacity | 100 – 2500 kVA |
| Rated Voltage (HV) | 10 kV / 11 kV / 10.5 kV (tap range ±5% in two steps) |
| Rated Voltage (LV) | 400V / 415V / 690V |
| Rated Frequency | 50Hz / 60Hz |
| Number of Phases | Three-phase |
| Connection Group | Dyn11 / Yyn0 (selectable) |
| Voltage Regulation | ±5% (off-circuit tap changer, 2 steps) |
| Cooling Method | AN (Air Natural) — optional AF (forced air) |
| Insulation Class | F / H |
| Core Material | Amorphous alloy (Fe-based metallic glass) |
| Winding Construction | Epoxy resin vacuum cast, self-extinguishing, moisture-resistant |
| Temperature Rise Limit | 100 K (F-class) / 125 K (H-class) |
| Degree of Protection | IP00 (core & coil) / IP20 / IP23 / IP31 (enclosure options up to IP54) |
| Ambient Temperature | -25°C to +40°C |
| Relative Humidity | ≤ 95% (non-condensing) |
| Altitude | Up to 1000 m (derating required for higher altitudes) |
| Standards | GB/T 10228, GB 1094, IEC 60076 |
Key Features
Amorphous Alloy Core TechnologyThe core is manufactured from iron-based amorphous alloy ribbon only 0.02–0.03 mm thick — about one-tenth the thickness of conventional CRGO silicon-steel laminations. The non-crystalline atomic structure eliminates magnetic domain walls, resulting in extremely low coercivity and hysteresis loss. No-load losses are 60–80% lower than equivalent SCB10/SCB11 dry-type transformers.
Exceptional Energy SavingsThe drastically reduced no-load losses mean the transformer consumes far less energy during overnight, weekend and seasonal low-load periods. For a 1000 kVA transformer operating continuously, the annual energy saving from core-loss reduction alone can exceed 10,000–15,000 kWh compared to conventional silicon-steel core equivalents.
Environmental and Fire SafetyThe dry-type cast resin construction contains no insulating oil, eliminating the risk of oil leaks, pool fires, explosions or soil/water contamination. This makes the SCBH15 series the preferred choice for indoor installations, underground substations, commercial buildings, hospitals, schools and environmentally sensitive areas where oil-filled transformers are restricted or prohibited.
Superior Humidity and Condensation PerformanceThe vacuum-cast epoxy resin insulation system provides excellent resistance to moisture absorption and surface condensation — the transformer can operate reliably in relative humidity up to 95% without the insulation degradation or partial discharge activity that would affect conventional open-wound dry-type transformers in the same environment.
Ideal for Load Fluctuation ApplicationsThe amorphous alloy core exhibits stable magnetic performance across a wide range of flux densities, maintaining low excitation current and low noise levels even under significant load variation. This is particularly beneficial for distribution networks supplying intermittent industrial loads, renewable energy systems and seasonal agricultural loads.
Compact and Lightweight DesignDespite the amorphous alloy core requiring a larger cross-sectional area than CRGO for equivalent flux handling, the overall transformer dimensions remain competitive with conventional dry-type transformers, with the added advantages of lower weight, reduced foundation loading and simplified handling and installation.
Low Maintenance OperationThe dry-type cast resin construction requires no oil testing, oil filtration, oil replacement or leak inspection throughout its service life. Routine maintenance is limited to periodic cleaning of ventilation ducts and inspection of electrical connections, significantly reducing lifetime operating costs compared to oil-immersed alternatives.
Applications
- Urban and rural power distribution networks requiring high energy efficiency
- Commercial buildings — shopping centers, office complexes, hotels
- Hospitals, schools, and public facilities with fire-safety restrictions
- Industrial plants, manufacturing facilities and processing plants
- Renewable energy — solar farm and wind farm auxiliary power
- Underground substations and indoor distribution rooms
- Environmentally sensitive areas — water catchment zones, national parks
- Data centers and telecommunications facilities requiring fire-safe transformers