SCBH15-100~2500/10 Amorphous Alloy Dry-Type Distribution Transformer
SCBH15 series amorphous alloy dry-type transformer utilizes an advanced amorphous alloy core material instead of conventional grain-oriented silicon steel (CRGO), delivering significantly reduced no-load losses and improved energy efficiency across the full operating range. This transformer can directly replace conventional silicon steel core transformers and is widely used in outdoor and indoor power distribution systems where fire safety, environmental protection, and energy efficiency are primary concerns.
The amorphous alloy core material is manufactured by ultra-rapid solidification of molten metal at approximately 1 million degrees Celsius per second, producing a non-crystalline atomic structure with exceptional magnetic properties — including very low coercivity and hysteresis loss. Compared to conventional CRGO silicon steel cores, the amorphous alloy core reduces no-load losses by 60–80%, dramatically decreasing the continuous energy consumption of the transformer over its 20+ year service life.
The large-scale deployment of SCBH15 series transformers delivers substantial energy-saving benefits and reduces atmospheric pollution by lowering CO₂ emissions associated with transformer energy losses. This product is particularly suitable for locations with limited electrical energy supply, significant load fluctuations, and environments where conventional oil-immersed transformers cannot be safely installed — the dry-type construction eliminates the risk of oil leaks, fire hazards, and environmental contamination.
The cast resin (dry-type) construction, combined with the amorphous alloy core, provides excellent performance in high-humidity environments where conventional transformers would experience insulation degradation. The transformer can operate reliably in humid conditions without the need for insulating oil or special protective enclosures, making it an ideal power distribution equipment choice for urban and rural distribution networks.
Technical Specifications
| Item | Specification |
|---|---|
| Model | SCBH15-100~2500/10 |
| Rated Capacity | 100kVA – 2500kVA |
| Rated Voltage (HV) | 10kV / 11kV / 10.5kV (tap range ±2×2.5% or ±5%) |
| Rated Voltage (LV) | 400V / 415V / 690V |
| Rated Frequency | 50Hz / 60Hz |
| Number of Phases | Three-phase |
| Core Material | Amorphous alloy (Fe-based metallic glass) |
| Core Loss Reduction vs CRGO | 60–80% lower than conventional silicon steel |
| No-Load Loss (Po) | Per GB/T 10228 — approximately 60–70% of SCB10/SCB11 series equivalent |
| Load Loss (Pk) | Per GB/T 10228 |
| Impedance Voltage (Uk) | 4% / 6% (depending on capacity) |
| Insulation Class | F / H (selectable) |
| Temperature Rise Limit | 100K (F-class) / 125K (H-class) |
| Dielectric Test (HV) | 35kV power frequency withstand (1 min) / 75kV lightning impulse (BIL) |
| Insulation Medium | Epoxy cast resin (vacuum-cast, void-free) |
| Cooling Method | AN (natural air) / AF (forced air) |
| Degree of Protection | IP00 (core & coil) / IP20 – IP54 (enclosure options available) |
| Ambient Temperature | -25°C to +40°C |
| Relative Humidity | ≤ 95% (non-condensing) — suitable for continuous operation in humid environments |
| Winding Material | High-conductivity electrolytic copper |
| Sound Level | ≤ 55–65 dB(A) (depending on capacity) |
| Standards | GB/T 10228, GB 1094, IEC 60076 |
Key Features
- Amorphous Alloy Core Technology: The transformer core is manufactured from iron-based amorphous alloy (metallic glass) ribbon with a thickness of only 0.02–0.03mm — approximately 1/10th 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 reduced by 60–80% compared to conventional SCB10/SCB11 series dry-type transformers, delivering continuous energy savings over the 20+ year transformer service life
- Exceptional Energy Savings: The drastically reduced no-load losses mean the transformer consumes significantly less energy during periods of light loading or no-load operation — typical overnight, weekend, and seasonal low-load periods. For a 1000kVA 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 Safety: The dry-type cast resin construction completely eliminates the need for mineral oil or other liquid insulating media — removing any risk of oil leaks, fire propagation, explosion, 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 Performance: The vacuum-cast epoxy resin insulation system provides excellent resistance to moisture absorption and surface condensation — the transformer can operate reliably in relative humidity conditions 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 Applications: The 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 — particularly beneficial for distribution networks supplying intermittent industrial loads, renewable energy systems, and seasonal agricultural loads
- Compact and Lightweight Design: Despite the amorphous alloy core material 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 Operation: The 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
- Environmental Sustainability: The amorphous alloy core material is manufactured using significantly less energy than conventional CRGO silicon steel production, and the transformer’s reduced core losses over its operating life result in substantially lower CO₂ emissions — supporting corporate sustainability and carbon reduction objectives
Applications
- Urban and rural power distribution networks requiring high energy efficiency
- Commercial buildings — shopping centers, office complexes, hotels
- Hospitals, schools, and public facilities — areas with fire safety restrictions
- Industrial plants — factories, 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