Zhejiang Jiangshan Hengli Electrical Co., Ltd. is one of the leading manufacturers and suppliers of triphase oil triphasic transformer in China. If you're going to wholesale durable triphase oil triphasic transformer made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.
The 75kVA triphase oil triphasic transformer is three-phase oil-immersed distribution transformer.It is a compact and efficient solution designed for stable power supply in small-scale distribution systems. The rated capacity of the triphasic transformer is 75kVA, the primary voltage is 11kv, the secondary voltage is 400v. As a direct transformer manufacturer, we provide reliable and cost-effective products with strict quality control from raw materials to final delivery.
This 75kVA triphase oil triphasic transformer is widely used in residential areas, small commercial facilities, and rural electrification projects. With its optimized structure and high-quality materials, it ensures low energy loss, low noise, and long-term operational stability.
Technical Specifications
| Rated Power | 75kVA |
| Primary Voltage | 11kV |
| Secondary Voltage | 400V |
| Frequency | 50Hz / 60Hz |
| Phase | Three |
| Model | S11-75KVA-11/0.4KV |
| Cooling Method | ONAN |
| Vector Group | Dyn11 |
| Impedance | 4%–6% |
| Winding Material | Copper |
| Tap Changer | NLTC |
| Tapping Range | ±2*2.5% |
| Accessories | Standard Configuration |
Applications
- Residential power supply
- Rural electrification
- Small factories and workshops
- Commercial buildings
Product Structure
Magnetic Core
The transformer core is built using precision-cut CRGO silicon steel laminations. A step-lap joint structure improves magnetic flux distribution, significantly reducing no-load losses and operating noise.
Winding Design
The low-voltage winding adopts foil winding technology, while the high-voltage winding uses layered copper conductors. This combination enhances thermal performance and short-circuit resistance.
Insulation & Cooling
The transformer oil serves as both insulation and cooling medium. It ensures stable dielectric strength and efficient heat transfer during continuous operation.
Tank Construction
The sealed corrugated tank compensates oil expansion and contraction, preventing air ingress and minimizing maintenance needs.
Scope of Supply
Oil-filled triphase oil triphasic transformer
Rated Power: Up to 5000 KVA
Primary Voltage: Up to 35 KV
Standard accessories (bushings, conservator optional, thermometer, etc.)
Test reports and technical documentation
Customization Options
Key Advantages
Compact size and lightweight design
Low noise operation suitable for urban areas
Excellent thermal stability
High reliability under fluctuating loads
Maintenance-free sealed structure
Manufacturer Capability
As a professional distribution transformer factory, we operate a complete production chain including core processing, coil winding, vacuum drying, and final assembly. Our advanced equipment ensures consistent quality and fast production cycles.
We support OEM/ODM customization for voltage, design, branding, and special applications.
- Voltage ratio customization (HV/LV)
- Copper or aluminum winding options
- Special loss requirements (low loss / eco design)
- Tap changer (off-load / on-load)
- Anti-corrosion or special environmental design
- Compact or lightweight structure
Testing Procedures
- Voltage ratio and polarity test
- Insulation resistance measurement
- Load and no-load loss test
- AC withstand voltage test
Transformer Oil Level Indicator
A transformer oil level indicator monitors the amount of insulating oil inside the tank, ensuring proper cooling and insulation. It helps detect low oil levels or leaks in time, preventing overheating, insulation failure, and potential equipment damage.
FAQ
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