The S11 oil-immersed transformer is a three-phase, fully sealed distribution transformer with a rated capacity of 250 kVA, designed for 10 kV/0.4 kV distribution systems. It utilizes high-quality silicon steel sheets, features oil-immersed self-cooling, and employs a fully sealed structure. Key characteristics include low losses, stable operation, strong overload capacity, and ease of maintenance. Offering excellent cost-effectiveness, it is widely used in urban and rural distribution settings, such as residential complexes, factories, rural power grids, and outdoor box-type substations.
| Rated Capacity (kVA) | Voltage Combination (kV) | Connection Method | Impedance Voltage (%) | Loss (kW) | No-load Current (%) | ||
| high Pressure | Low Pressure | No-load | load | ||||
| 10 | 11 | 0.4 | Yyn0 | 4 | 0.065 | 0.6 | 3.5 |
| 20 | 0.08 | 0.52 | 3 | ||||
| 30 | 0.1 | 0.63/0.6 | 2.3 | ||||
| 50 | 0.13 | 0.90/0.87 | 2 | ||||
| 63 | 0.15 | 1.00/1.04 | 1.9 | ||||
| 80 | 10.5 | 0.18 | 1.30/1.25 | 1.8 | |||
| 100 | 0.2 | 1.58/1.5 | 1.8 | ||||
| 125 | 0.24 | 1.86/1.8 | 1.7 | ||||
| 160 | 0.28 | 2.31/2.2 | 1.6 | ||||
| 200 | 10 | 0.34 | 2.73/2.6 | 1.5 | |||
| 250 | 0.4 | 3.2/3.25 | 1.4 | ||||
| 315 | 0.48 | 3.83/3.65 | 1.4 | ||||
| 400 | 0.57 | 4.52/4.3 | 1.3 | ||||
| 500 | 6.3 | 0.69 | Dyn11 | 0.68 | 5.41/5.15 | 1.2 | |
| 630 | 0.81 | 6.2 | 1.1 | ||||
| 800 | 4.5 | 0.96 | 7.5 | 1 | |||
| 1000 | 1.15 | 10.3 | 1 | ||||
| 1250 | 1.36 | 12 | 0.9 | ||||
| 1600 | 1.64 | 14.5 | 0.8 | ||||
| 2000 | 1.96 | 19.8 | 0.8 | ||||
| 2500 | 2.31 | 23 | 0.7 | ||||
Junneng supplies power cables, optical fiber communication cables, transformers, switchgear, distribution cabinets, distribution boxes and supporting electrical equipment for power distribution projects.
Yes. We can support model selection, voltage level matching, cabinet configuration, cable specification review and other customization needs according to drawings or technical requirements.
Materials, production processes, assembly details and finished products are checked through internal inspection and testing procedures before delivery.
Yes. We support overseas buyers with requirement review, quotation communication, product matching, documentation follow-up and shipment coordination.
Please share the product type, model or drawing, voltage/current requirements, quantity, application environment and any required standards or certificates.
We can provide technical communication, product selection support, installation reference information and after-sales coordination for related project applications.
Our products are used in power transmission and distribution, industrial facilities, commercial buildings, renewable energy systems, microgrids and optical fiber communication projects.
After order confirmation, we coordinate production follow-up, packing, documentation and shipment updates so customers can track delivery progress clearly.
Relevant certificates, product specifications, inspection documents or test reports can be discussed according to the product category and project requirement.
Tell us your application, power parameters, installation environment and project goals. Our team will recommend suitable product options and confirm key technical details with you.
