The CastGuard SC(B)10/11 Series represents the advanced generation of vacuum cast resin, dry-type transformers, engineered as the superior, safe, and eco-friendly alternative to traditional oil-filled units. Utilizing a glass fiber reinforced, thin insulation, resin casting process, these transformers offer exceptional reliability, fire safety (F1 classification), and environmental compatibility. Designed for voltages from 10kV to 35kV, they are the ideal choice for mission-critical installations where safety, space constraints, and low maintenance are paramount, including high-rise buildings, commercial hubs, hospitals, data centers, industrial plants, and marine environments.
Key Features & Advantages
• Ultimate Safety & Environmental Protection
Flame-retardant, self-extinguishing resin encapsulation eliminates the risk of fire or oil leakage. Contains no toxic liquids, making it perfectly safe for indoor installation and environmentally friendly.
• Exceptional Reliability & Durability
The vacuum pressure impregnation (VPI) and casting process with glass fiber reinforcement creates a solid, monolithic coil block. This provides superior resistance to moisture, dust, chemicals, and short-circuit forces, ensuring a long operational life with minimal maintenance.
• High Performance Insulation System
Features Class F (155°C) insulation with a designed maximum temperature rise of 100K, providing a significant thermal safety margin for overload conditions and enhanced longevity.
• Robust Mechanical & Environmental Protection
The encapsulated windings are housed in a sturdy enclosure, available in standard IP00, IP20 (indoor), or IP23 (outdoor) protection ratings, effectively shielding live parts from accidental contact and environmental ingress.
• Wide Application Versatility
Uniquely suited for a vast range of demanding and sensitive locations—from power plants, hospitals, and museums to offshore platforms, ships, tunnels, and mining operations—where safety and reliability cannot be compromised.
• Flexible Configuration
Available with off-circuit or on-load tap-changers, multiple vector groups (Yyn0, Dyn11, etc.), and suitable for both 50Hz and 60Hz systems, offering great adaptability to specific project requirements.
Specifications & Parameters
| Category | Specification / Description |
| Model Series | SC(B)10, SC(B)11 |
| Rated Voltage |
10kV, 20kV, 35kV |
| Capacity Range | 30 kVA to 6300 kVA |
| Frequency | 50 Hz or 60 Hz |
| Phases | 3 |
| Tap Changer | Off-Circuit Tap Changer (OCTC) or On-Load Tap Changer (OLTC) |
| Tap Range | ±5% or ±2x2.5% |
| Vector Group | Yyn0, Dyn11 (or as requested) |
| Insulation Class | Class F (155°C) |
| Max. Temperature Rise | 100 K |
| Cooling Method | Air Natural (AN) |
| Protection Level (IP) | IP00, IP20 (Standard Indoor), IP23 (Weather Protected) |
| Ambient Conditions | Max. ambient temp: +40°C, Relative Humidity: ≤100% |
| Dielectric Strength | 10kV: AC 35kV / LI 75kV 20kV: AC 50kV / LI 125kV 35kV: AC 70kV / LI 170kV |
| Short-Circuit Impedance As per performance parameter table (standard values). | |
Packaging, Warranty & Certifications Packaging：
Transformers are securely mounted on a robust base frame. For protection during transit, the unit is typically covered with a reinforced plastic sheet and a wooden crate or steel frame is built around it. Sensitive components like bushings and temperature controllers are individually packed.
Warranty：
We offer a comprehensive standard 12-month warranty from the date of commissioning or 18 months from shipment, whichever occurs first. The warranty covers defects in materials and workmanship under normal operating conditions.
Quality Certifications：
Our manufacturing process is certified under ISO 9001 Quality Management Systems. Products are designed and tested in accordance with IEC 60076-11 and relevant national standards (e.g., GB 1094.11).
