Versatile Oil Immersed Transformers S11-M-10kV Series 10kV 10.5kV 11kV 20kV

The S11-M-10kV series is a high-performance, hermetically sealed distribution transformer engineered for versatility and resilience. It is the ideal power solution for residential neighborhoods, commercial hubs, and high-rise infrastructures, as well as remote mountainous regions. Its robust sealing makes it particularly effective in environments with high dust concentration or heavy pollution.

• International Standards: All performance indicators strictly comply with IEC standards and relevant national regulations, ensuring global grid compatibility.

• Extreme Energy Efficiency: Designed for significant energy savings, the S13-M series achieves a 30% to 50% reduction in average no-load loss and an 80% to 90% reduction in no-load current compared to the S9 series.

• Advanced Core & Tank Design: Features a corrugated oil tank constructed from 08AL cold-rolled steel, resulting in a compact footprint, high structural integrity, and a modern aesthetic.

• Superior Reliability: The optimized structural design provides high operational stability, strong overload capacity, and ultra-low noise levels.

• Hermetic Insulation: The transformer oil is completely isolated from the external atmosphere, effectively preventing moisture absorption and oxidative aging of the insulation fluid.

• 20-Year Maintenance-Free Operation: Under standard operating conditions, the unit requires no internal inspection or maintenance for 20 years, drastically reducing long-term lifecycle costs.

• Grid Modernization Choice: Combining safety, environmental protection, and low operational overhead, the S13-M is the premier choice for modernizing electrical distribution networks.

• Premium Materials: The core is constructed from high-quality, cold-rolled grain-oriented (CRGO) silicon steel sheets with 45° full-mitre joints to optimize magnetic flux.

• Reinforced Clamping: The iron yoke is secured using specialized insulation tension straps and side bolts, while the upper and lower yokes are integrated via high-strength tie rods.

• Low-Loss Design: Core columns are bound with non-inductive glass fiber tape, and the entire exterior surface is coated and bonded with high-grade insulating varnish. By stacking in 1 or 2-piece increments per grade, we significantly reduce no-load loss and operational noise.

• Optimized Geometry: Coils feature a layered, semi-oval (oblong) structure. Inter-layer insulation utilizes GS643 reinforced adhesive paper and pre-compressed diamond-pattern thermosetting epoxy resin paper.

• Enhanced Cooling: Integrated vertical spacers ensure consistent oil circulation and superior cooling efficiency.

• Structural Integrity: During controlled vacuum drying, the epoxy resin melts and bonds the insulation and conductors into a rigid, monolithic unit. This process drastically increases mechanical strength and short-circuit resistance.

• Copper Foil Technology: For low-voltage windings using copper foil, the alignment between foil width and high-voltage coil height eliminates the helix angle. This minimizes transverse leakage magnetic fields, reducing axial short-circuit forces to 1/10th – 1/5th of traditional structures.

• High-Voltage Precision: HV windings utilize paper-wrapped or enameled copper conductors to maximize space utilization and contact area with the adhesive, further bolstering mechanical durability.

• Lightning Protection: The layered winding structure provides high longitudinal capacitance, ensuring a uniform voltage distribution during lightning surges and enhancing overall impulse resistance.

• Precision Manufacturing: Constructed from high-rigidity, high-elasticity specialty steel using microcomputer-controlled automated production lines for a compact and aesthetic finish.

• Environmental Isolation: The "Breathing" corrugated tank allows for internal pressure adjustment while keeping insulation oil completely isolated from the atmosphere, preventing moisture ingress and oxidative aging.

• Leak Prevention: The corrugated fin design significantly reduces the number of weld points compared to traditional radiators, minimizing the risk of oil seepage.

• Superior Finish: A non-spray vacuum drying paint process is applied to the tank surface, ensuring high adhesion, a durable film, and a premium appearance.

• Flexible Connections: All high and low-voltage leads utilize flexible connectors to mitigate mechanical stress.

• Cold-Press Technology: HV tap leads are connected to switches using cold-press technology, eliminating the risks of "cold joints" or insulation carbonization associated with traditional gas welding.

• Secure Positioning: Multi-point positioning between the transformer body and the tank prevents internal displacement during transit. This ensures that the transformer is ready for immediate installation upon arrival at the site without requiring an internal core inspection.

• Precision Monitoring: Equipped with advanced transformer oil-level indicators and high-sensitivity pressure relief valves.

• Operational Safety: These integrated safety features strengthen real-time monitoring capabilities during operation, ensuring maximum reliability and asset protection.

• Exceptional Energy Efficiency

  Our S11-M series delivers industry-leading performance, achieving a 30% to 50% reduction in average no-load loss and an 80% to 90% reduction in no-load current compared to traditional S9 models.

• 20-Year Maintenance-Free Reliability

  Designed with a hermetically sealed corrugated tank, the insulation oil is completely isolated from the atmosphere. This prevents moisture and aging, ensuring two decades of operation without the need for internal inspections.

• Advanced "Cold-Press" Safety Technology

  We utilize cold-press technology for high-voltage lead connections instead of traditional gas welding. This eliminates the risk of carbonized insulation and "cold joints," significantly enhancing internal structural safety.

• Superior Short-Circuit & Impulse Resistance

  By using layered winding structures and thermosetting epoxy resin paper, our coils bond into a monolithic unit under vacuum drying. This provides unmatched mechanical strength and a uniform distribution of lightning impact voltages.

• Precision Manufacturing & Modern Aesthetics

  Our corrugated tanks are built on microcomputer-controlled automated lines using high-elasticity specialty steel. This ensures a compact footprint, a leak-proof design with fewer weld points, and a high-durability finish that withstands harsh environments.

• Ready-to-Install Convenience

  Thanks to multi-point internal positioning, our transformers are protected against displacement during transit. Upon arrival at your site, the unit can be deployed immediately without the need for time-consuming core checks.