Basic Specifications
Model NO.
400KVA 10KV
Core
Core-type Transformer
Cooling Method
Oil-immersed Type
Winding Type
Two-winding Transformer
Certification
ISO9001-2000, ISO9001, CCC
Usage
Distribution & Power Transformer
Frequency
Power Frequency
Shape of Core
EI
Iron Core
Silicon Steel Sheet
Weight
1375kg
HS Code
850422
Capacity
1000PCS/Month
Fully Sealed Oil-Immersed Distribution Transformer
Our technology-oriented enterprise specializes in the R&D, production, and service of high-quality power transformers. The three-phase oil-immersed distribution transformer adopts a cutting-edge insulation structure designed to significantly enhance short-circuit resistance.
Core Advantages
- Low loss, low noise, and low partial discharge levels.
- Energy-saving design with low temperature rise.
- Excellent anti-short-circuit capability through optimized insulation.
- Stable internal structure preventing malfunctions during long-distance transportation.
- High-efficiency heat sinks (corrugated sheets or radiators).
High-Quality Material Selection
- Oxygen-Free Copper: Lower resistivity and smoother surface treatment for reduced load loss.
- High-Quality Silicon Steel: Lower unit loss to minimize no-load loss performance.
- Laminated Wood Insulation: High-strength components that resist cracking under short-circuit stress.
- Deeply Filtrated Oil: Lower moisture, gas, and impurity levels for reliable operation.
- Advanced Sealing: High-quality rubber materials to prevent aging and eliminate leaks.
Fields of Application
Our transformers are widely utilized across various critical infrastructures and industrial sectors:
- Power stations and compact transformer substations.
- Industrial factories, chemical plants, and mines.
- Hospitals, high-rise buildings, and airports.
- Tunnels and specialized nuclear power applications.
Mechanical & Technical Parameters
| Rated Capacity (kVA) |
H.V. (kV) |
Tapping Range |
L.V. (kV) |
Vector Group |
Load Loss (kW) |
No-load Loss (kW) |
Impedance (%) |
| 30 | 6 / 6.3 / 10 / 10.5 / 11 | ±5% | 0.4 | Yyn0 | 0.6 | 0.10 | 4 |
| 100 | ±5% | 0.4 | Yyn0 | 1.50 | 0.20 | 4 |
| 250 | ±5% | 0.4 | Dyn11 | 3.05 | 0.40 | 4 |
| 400 | ±5% | 0.4 | Dyn11 | 4.30 | 0.57 | 4 |
| 630 | ±2×2.5% | 0.4 | Dyn11 | 6.20 | 0.81 | 4 |
| 1000 | 10 / 11 | ±2×2.5% | 0.4 | Dyn11 | 10.30 | 1.15 | 4.5 |
| 2500 | 10 / 11 | ±2×2.5% | 0.4 | Dyn11 | 21.20 | 2.50 | 4.5 |
Manufacturing & Facility Showcase
Frequently Asked Questions
Q1: What are the primary advantages of an oil-immersed transformer?
A: These transformers offer excellent cooling efficiency, high insulation strength, and superior heat dissipation, making them ideal for high-capacity power distribution in various environments.
Q2: Can these transformers be used in high-altitude areas?
A: Yes, standard units are suitable for up to 1000m. Special designs are available for altitudes exceeding 1000m upon request.
Q3: What kind of core material is used?
A: We use high-quality cold-rolled silicon steel sheets with low unit loss to ensure minimal no-load losses and maximum efficiency.
Q4: How do you ensure the quality of the transformer?
A: Every unit undergoes strict professional quality inspection at key nodes and a comprehensive final test at our intelligent testing center before dispatch.
Q5: Is maintenance difficult for fully sealed transformers?
A: No, the fully sealed design prevents oil oxidation and moisture contact, which significantly reduces the need for regular maintenance and extends the service life.
Q6: What certifications do your transformers carry?
A: Our products are fully certified under ISO9001-2000, ISO9001, and CCC national standards.
Tanaka Electric
