Home > S Series 10kV 3D Wound Core Oil Immersed Transformer (30-1600 kVA)
Product Overview:
The 10kV 3D Wound Core Transformer represents a revolutionary leap in power distribution technology. By replacing traditional stacked core laminations with a continuous, jointless three-dimensional wound core, this 10kV low loss oil-immersed transformer achieves perfect magnetic symmetry. It is engineered to maximize energy conservation, dramatically reduce operational noise, and minimize footprint.
This strip wound core transformer addresses the critical pain points of modern grid infrastructure. It slashes no-load current by up to 92% compared to standard models and operates at a whisper-quiet 47dB, making it the premier choice for urban residential complexes, indoor substations, data centers, and commercial hubs where efficiency and environmental noise are strictly regulated.
Key Advantages:
• Fully symmetrical 3D magnetic circuit with zero joint gaps
• 10% to 20% reduction in core iron loss
• Central "chimney effect" channel for superior natural cooling
• 10% to 15% smaller footprint than traditional transformers
• Ultra-low noise design (approximately 19dB lower than national standards)
| TECHNICAL PARAMETERS (3D WOUND CORE TRANSFORMER) | |
|---|---|
| Rated Capacity | 30 kVA to 1600 kVA |
| High Voltage (HV) | 6, 6.3, 10, 10.5, 11 kV |
| Low Voltage (LV) | 0.4 kV |
| Tapping Range | ±2x2.5%, ±5% |
| Vector Group | Dyn11, Yzn11, Yyn0 |
| Short-circuit Impedance | 4% (30~500 kVA) / 4.5% (630~1600 kVA) |
| Core Structure | Three-dimensional continuous wound core (Jointless) |
| Operating Noise Level | ~ 47 dB (Ultra-low noise) |
| Phase Layout | Symmetrical triangular configuration |
Unlike conventional transformers that use flat, stacked silicon steel sheets, the 3D wound core transformer utilizes a continuous winding process. The three-phase magnetic circuit is completely symmetrical and jointless. Because the magnetic flux direction perfectly aligns with the crystal orientation of the silicon steel strips, there are no high-resistance areas and no flux distortion at the joints. This results in a perfectly balanced three-phase no-load current.
Efficiency is at the heart of this oil immersed power transformer. By eliminating lap joints, the iron loss coefficient drops to approximately 1.05, cutting core iron loss by 10-20% and reducing core material usage by 25%. Furthermore, the core undergoes a high-temperature (800°C) vacuum nitrogen annealing process. This eliminates mechanical winding stress and refines the magnetic domains of the silicon steel, dropping the no-load loss by 25-35% and the no-load current by up to 92% compared to standard limits.
Noise pollution from electrical equipment is a major concern in urban environments. Because the strip wound transformer core is tightly and continuously wound on specialized machinery, it completely avoids the discontinuous magnetic circuit noise inherent in stacked cores. Type tests confirm that this transformer operates at an ultra-low noise level of just 47dB—nearly 19dB below the standard 66dB limit—making it virtually silent and perfectly suited for indoor or residential area installations.
The highly efficient core generates very little self-heating due to its exceptionally low idling losses. Moreover, the three coils are arranged in a triangular (品-shaped) layout. This unique geometry naturally forms a central, top-to-bottom air channel—a "draft chimney." With a temperature difference of 30-40°C between the top and bottom yokes, this channel drives intense natural air convection, rapidly drawing heat away from the core and drastically enhancing the transformer's overload capacity without requiring forced cooling.
The specialized 3D architecture results in a highly compact layout. Compared to traditional oil-immersed transformers, the footprint is reduced by 10-15% and the overall height is lowered by 10-20%. When integrated into prefabricated box-type substations, this space-saving design can reduce the required enclosure volume by nearly one-fourth, significantly lowering civil engineering and land acquisition costs.
A 3D wound core has no joints and is continuously wound, which perfectly aligns with the magnetic flux direction. This eliminates high-resistance corners and magnetic distortion, slashing no-load current by up to 92% and reducing core iron loss by 10-20%, leading to significant long-term energy savings.
Yes, it is highly recommended for noise-sensitive areas. The continuous, jointless core design completely eliminates the magnetic vibration noise typically found in stacked cores. It operates at an ultra-low noise level of approximately 47dB, which is nearly 19dB lower than standard industry limits.
The three coils are arranged in a triangular layout, which naturally creates a top-to-bottom central air channel. The heat generates a strong "chimney effect" that drives continuous natural air convection. This efficiently pulls heat away from the core, providing excellent thermal management and enhanced overload capacity.
We offer these 10kV low loss oil-immersed transformers in rated capacities ranging from 30 kVA up to 1600 kVA. The high voltage side supports 6kV to 11kV (with various tapping ranges like ±5% or ±2x2.5%), and the low voltage side outputs standard 0.4kV.
