Dry-type power transformer
35kV epoxy-resin cast dry-type power transformer
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Technical Performance
Technical Specification
35kV epoxy‑resin cast dry‑type transformer (models SCB/SC series), with core components compliant with GB/T 10228, GB 1094.11, and IEC 60076 standards. It is a three‑phase indoor unit rated for 50 Hz, available in capacities from 30 kVA to 25,000 kVA, with voltage ratings of 35 kV ±2.5% / 0.4 kV (or 10 kV). Insulation class: F (155°C) / H (180°C). Cooling methods: AN (natural air cooling) / AF (forced air cooling). Protection levels: IP20 / IP23.
Performance Features
• Fire Safety: The epoxy resin is flame-retardant and self-extinguishing (UL94 V‑0 rating), oil-free, and free from explosion risks, making it suitable for high-rise buildings, subways, data centers, and other such environments.
• Reliable insulation: Vacuum casting ensures bubble-free construction, with partial discharge levels ≤10 pC; it is moisture- and dust-proof, capable of operating in 100% relative humidity, and requires no drying or preheating upon shutdown.
• High mechanical strength: The windings are fully cast, providing strong resistance to short circuits, withstanding sudden short-circuit electromagnetic forces and exhibiting excellent seismic performance.
• Energy-efficient and low-noise: The core is made of high-quality silicon steel laminations, reducing no-load losses by 5% compared to conventional products, with noise levels as low as 50–60 dB(A).
• Maintenance-free: Oil-free system, no need to monitor oil quality or level, low maintenance costs, and a design life of ≥25 years.
• Strong overload capability: With AF forced air cooling, it can operate continuously at 120% of rated load and withstand short-term overloads up to 150%.
• Flexible installation: Compact and lightweight, it can be placed directly at the load center, reducing civil engineering costs.
Precautions
Please inquire.
Warranty period
Please inquire.
Details and Specifications
Typical SCB13 Series
Basic Electrical Parameters | Insulation and Temperature Rise | Loss and Noise | Environment and Structure | ||||
Rated capacity | 30~25000kVA | Insulation Class | Class F (155°C) / | No-load loss | ≈3.2kW | Ambient temperature | -5℃~+40℃ (indoor) |
Rated voltage | High voltage 35 kV | Temperature Rise Limit | Coil ≤ 100K (Class F), | Load loss (75°C) | ≈19kW | Altitude | 1000m |
Connection Group | Dyn11 (mainstream) / Yyn0 | Cooling method | AN (Natural Air Cooling) / | No-load current | ≤0.8% | Protection rating | IP20 (protected against finger contact) / |
Rated frequency | 50Hz |
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| Noise | ≤58dB (A) | Dimensions (2500 kVA) | Approx. 2200×1200×1800 mm |
Short-circuit impedance | 6%~8% |
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| Weight (2500 kVA) | Approximately 3,800 kg |
Insulation level | LI170AC70/AC3 |
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The data in the table are for reference only; the company reserves the right to modify the data and accepts special orders.
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