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Our 35kV dry-type transformers feature capacities ranging from 30kVA to 5000kVA. Utilizing epoxy resin casting, the SCB13 series is currently one of the most widely used energy-saving products for 35kV voltage grades. They ensure high safety, excellent environmental adaptability, and full compliance with the latest efficiency standards.
Core Parameters:
• Voltage Ratings: 35kV / 0.4kV (Customizable)
• Insulation Class: Class F (155℃) or Class H (180℃)
• Cooling Method: AN / AF
Product Features
Constructed with epoxy resin casting, making it flame retardant and self-extinguishing. Available with IP20 protection to prevent accidental contact with live parts.
Features AN/AF cooling modes. When equipped with forced air cooling (AF), the transformer's capacity can be increased by 50% during heavy loads.
The standard Dyn11 vector group offers strong anti-harmonic capabilities and minimal zero-sequence impedance, perfect for modern grids.
Fully complies with the latest GB/T 10228-2023 standards. Optional SCB14/SCB18 versions are available for even lower energy losses.
Core Technical Specifications
Parameter | Technical Indicators | Remarks |
| Product Model | SCB13-30~5000kVA/35 | "S" Three-phase, "C" Epoxy cast, "B" Foil coil |
| Rated Frequency | 50 Hz | Standard frequency |
| Voltage Combination | HV: 35kV / 38.5kV LV: 0.4kV | LV customizable to 3.15kV, 6.3kV, 10.5kV |
| Tapping Range | ±5% or ±2×2.5% | Off-circuit tap changing |
| Vector Group | Dyn11 or Yyn0 | Dyn11 provides strong anti-harmonic performance |
| Insulation Class | Class F (155℃) or Class H (180℃) | Epoxy resin cast, flame retardant |
| Temp. Rise Limits | Winding: 100K (Class F) / 125K (Class H) | Dry-type specific |
| Short-Circuit Impedance | 4.0% - 8.0% | Impedance generally increases with capacity |
| Protection Grade | IP00 / IP20 / IP23 | IP20 prevents solid objects >12mm |
Full Series Parameters (SCB13-35kV)
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Capacity (kVA) | No-Load Loss (W) | Load Loss (W) | No-Load Current (%) | Impedance (%) | Ref. Weight (kg) |
| 30 | 260 | 1,040 | 2.0 | 4.0 | ~350 |
| 50 | 360 | 1,450 | 1.8 | 4.0 | ~450 |
| 80 | 500 | 2,050 | 1.6 | 4.0 | ~550 |
| 100 | 580 | 2,400 | 1.5 | 4.0 | ~650 |
| 125 | 670 | 2,850 | 1.4 | 4.0 | ~750 |
| 160 | 800 | 3,400 | 1.3 | 4.0 | ~900 |
| 200 | 940 | 4,000 | 1.2 | 4.0 | ~1,050 |
| 250 | 1,100 | 4,750 | 1.1 | 4.0 | ~1,250 |
| 315 | 1,300 | 5,700 | 1.0 | 6.0 | ~1,500 |
| 400 | 1,550 | 6,900 | 0.9 | 6.0 | ~1,800 |
| 500 | 1,800 | 8,200 | 0.8 | 6.0 | ~2,100 |
| 630 | 2,150 | 9,900 | 0.7 | 6.0 | ~2,500 |
| 800 | 2,600 | 12,000 | 0.6 | 6.0 | ~3,000 |
| 1000 | 3,100 | 14,500 | 0.5 | 6.0 | ~3,600 |
| 1250 | 3,700 | 17,500 | 0.5 | 7.0 | ~4,300 |
| 1600 | 4,500 | 21,500 | 0.4 | 7.0 | ~5,200 |
| 2000 | 5,400 | 25,800 | 0.4 | 7.0 | ~6,300 |
| 2500 | 6,500 | 31,000 | 0.3 | 7.0 | ~7,500 |
| 3150 | 7,800 | 37,500 | 0.3 | 8.0 | ~9,000 |
| 4000 | 9,500 | 46,000 | 0.25 | 8.0 | ~11,000 |
| 5000 | 11,500 | 55,500 | 0.2 | 8.0 | ~13,500 |
| Note: Loss values are approximate. For new projects, we recommend SCB14 or SCB18 series which offer even lower losses compliant with GB/T 10228-2023. | |||||
FAQ & Selection Guide
For standard operations, AN (Natural Air Cooling) is recommended as it operates silently without fans and requires minimal maintenance. If you anticipate load spikes, choose AN/AF (Forced Air Cooling). When temperatures rise or the load exceeds rated capacity, the fans activate, allowing for a short-term 50% capacity overload.
35kV dry-type transformers are primarily designed for indoor use. If outdoor installation is necessary, the unit MUST be equipped with a protective enclosure rated IP54 or higher. This enclosure will protect the transformer from UV radiation and rain, while also providing necessary ventilation and heat dissipation.
Whatsapp: +86-13961294414
E-mail: junqiu.wang@czguanghui.cn
jocelyn.duan@czguanghui.cn
ADD: No. 1, Yulong Middle Road, Xuejia Town, Xinbei District, Changzhou City, China
Mobile: 0086-15380068868
