| Brand | Vziman |
| Model NO. | Customized Oil Immersed Distribution Transformer China Manufacturer 11kV-35kV |
| Rated voltage | 11kV |
| Rated frequency | 50/60Hz |
| Rated capacity | 160kVA |
| Series | S11 |
Vziman is a professional oil-immersed distribution transformer manufacturer in China. Our products cover the full voltage range of 11kV to 35kV, with capacity up to 5000 KVA, suitable for medium and low voltage distribution network systems.
The product adopts a fully sealed corrugated tank structure. The corrugated panels automatically expand and contract with ambient temperature changes to ensure stable heat dissipation. The corrugated tank features a sleek appearance and compact size, saving on-site installation space.
The product is manufactured strictly in accordance with the IEC 60076-1 standard, with standardized technical parameters suitable for global grid applications. Vziman implements strict full acceptance testing for every delivered unit and has maintained a zero-fault rate record for more than 10 years.
| Item | Parameter |
|---|---|
| Type | Oil-Immersed Distribution Transformer |
| Standard | IEC 60076-1 |
| Rated Capacity | Up to 5000 KVA |
| Frequency | 50 Hz / 60 Hz |
| Phase | Three |
| Cooling Type | ONAN / ONAF |
| High Voltage Side | 11kV, 27kV, 33kV, 34.5kV, 35kV (selected per project) |
| Low Voltage Side | 0.4kV, 6.3kV, 10.5kV, 11kV (selected per project) |
| Winding Material | Copper |
| Vector Group | Dyn11 / Yyn0 / YNd11 |
| Short-Circuit Impedance | 4.0% (reference value for 160 KVA / 11kV); other capacities and voltage classes determined per IEC 60076-1 and project requirements |
| Tap Changer | NLTC / OLTC (optional) |
| Tapping Range | ±2×2.5% / ±8×1.25% |
| No-Load Loss | Per capacity and project requirements |
| On-Load Loss (75°C) | Per capacity and project requirements |
| No-Load Current | Per capacity and project requirements |
| Accessories | Oil level gauge, temperature indicator, pressure relief valve (configured per project requirements) |
Separate tolerance for no-load loss and on-load loss: ≤ +15%
Total loss tolerance: ≤ +10%
Short-circuit impedance tolerance: ±10% (when impedance <10%)
No-load current tolerance: ≤ +30%
Typical Reference Data (160 KVA / 11kV / 0.4kV):
No-Load Loss: 280 W
On-Load Loss (75°C): 2200 W
No-Load Current: 1.4%
Short-Circuit Impedance: 4.0%
Vector Group: Dyn11
Losses, impedance, and other parameters for other capacities and voltage classes will be designed and determined per IEC 60076-1 and project requirements. Please provide your technical specifications, and we will supply a detailed parameter sheet accordingly.
| Parameter | Standard Value |
|---|---|
| Ambient Temperature | Maximum +40°C, minimum -25°C |
| Monthly Average Maximum Temperature | ≤ +30°C |
| Annual Average Temperature | ≤ +20°C |
| Altitude | ≤ 1000 m |
| Installation Site | Outdoor / Indoor |
| Environmental Requirements | Free from corrosive gases, flammable/explosive substances, well-ventilated |
160 KVA 11/0.4KV Transformer Winding
Standard operating conditions are based on IEC 60076-1: altitude ≤1000m, ambient temperature from -25°C to +40°C. For altitude over 1000m or extreme temperature sites, we can redesign insulation, heat dissipation and rated parameters specially to meet site environmental requirements. Please specify working conditions during inquiry.
Our 11–35kV oil immersed transformers are widely used for urban & rural residential power distribution, industrial park power supply, utility substation projects, and new energy power distribution including solar and wind power stations. They also adapt to infrastructure projects such as railways, mines and airports.
Every transformer undergoes comprehensive full acceptance testing strictly following IEC 60076-1 tolerance rules, including loss testing, impedance testing, no-load current testing, vacuum and leakage tests. Our factory has maintained a 10+ years zero-fault delivery record, ensuring stable, low-loss and long-term continuous operation.
We proudly offer 10-year long factory warranty for all our 11kV–35kV oil-immersed distribution transformers. All products are strictly manufactured and tested in accordance with IEC 60076-1 international standards. Benefiting from premium copper winding materials, fully sealed corrugated tank structure and complete pre-delivery testing procedures, our transformers achieve extremely stable performance.
Under standard operating conditions complying with IEC specified ambient and installation requirements, we guarantee free maintenance and component replacement for quality-related failures within 10 years. We also provide lifetime technical support and after-sales maintenance services to ensure long-term safe operation of power grid equipment.
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