Product Overview
The 15kV oil-immersed distribution transformer is a general-purpose indoor/outdoor core equipment for high-voltage power distribution. It is suitable for three-phase AC 50Hz, 15kV power transmission and distribution systems. Widely used in urban power grid expansion, large industrial and mining enterprises, industrial parks, new energy bases, and other high-voltage power distribution locations. It undertakes functions including voltage transformation, power distribution, voltage stabilization, and power transmission. It is key equipment for efficient power supply in 15kV distribution networks, suitable for medium to large power application scenarios.
The product adopts a fully sealed structure (non-sealed optional). The core uses high-quality, high-permeability cold-rolled grain-oriented silicon steel sheets. The windings use high-strength oxygen-free enameled copper wire (aluminum wire optional). Equipped with an efficient heat dissipation system and specialized insulating oil, it features low loss, low noise, strong overload capacity, excellent insulation, stable operation, and long service life. It complies with national standards such as GB 1094, and has passed CCC and ISO certifications. The quality is reliable, suitable for industrial, power, and other fields with high requirements for power supply reliability.
Operating Environment
1. Ambient temperature: -30℃～+40℃, 24h average ≤ +35℃; anti-freezing design customizable for low temperatures to ensure oil fluidity and equipment startup.
2. Altitude: ≤1000m; customizable for high-altitude adaptation up to 4000m under special conditions, with optimized insulation structure for high-altitude environments.
3. Relative humidity: Daily average ≤ 95%, monthly average ≤ 90%; anti-condensation devices can be provided for humid environments to ensure insulation stability.
4. Installation site: No violent vibration, corrosive gases, flammable or explosive dust, or conductive dust; keep away from strong electromagnetic interference.
5. Outdoor units withstand rain, snow, sand, and dust, equipped with rain and dust protection enclosures; indoor units require good ventilation and no standing water to avoid overheating.
6. Installation inclination: ≤3° relative to the vertical plane to ensure equipment stability and even oil distribution, guaranteeing heat dissipation and insulation performance.
Technical Parameters
Item | Unit | Parameters |
|---|---|---|
Rated Voltage | kV | 15±5%/0.4 (±2×2.5% customizable) |
Rated Frequency | Hz | 50 |
Rated Capacity | kVA | 100, 125, 160～3150 (full series) |
Number of Phases | --- | Three-phase |
Connection Symbol | --- | Dyn11 (common), Yyn0 (customizable) |
Cooling Method | --- | ONAN (Oil Natural Air Natural), ONAF (customizable) |
Insulation Level | kV | Power frequency withstand voltage 50kV/1min; induced withstand voltage 85kV (10s) |
Impedance Voltage | % | 4.5%, 6.0%, 8.0% (matched according to capacity, customizable) |
Noise Level | dB | ≤62～75 (low-noise type customizable to ≤55dB) |
Protection Grade | --- | Indoor IP20; Outdoor IP33, IP54, IP65 (customizable) |
Insulating Oil | --- | 25# transformer oil (45# low-temperature type, anti-aging type customizable) |
Product Features
1. High Efficiency, Low Loss, Outstanding Energy Savings: Uses high-permeability grain-oriented silicon steel sheets and stepped core joint design. Optimized winding arrangement using oxygen-free copper conductors results in low loss and low noise, meeting national energy efficiency standards, suitable for long-term continuous industrial operation.
2. Excellent Insulation, Safe and Reliable: Optimized insulation structure for 15kV high voltage, combined with specialized insulating oil and vacuum oil filling process, providing high insulation strength and strong short-circuit withstand capability, eliminating risks of electric leakage and oil leakage, complying with safety regulations.
3. Efficient Heat Dissipation, Strong Overload Capacity: Uses corrugated tank or radiator design. High heat dissipation efficiency and low temperature rise. Allows stable long-term operation at rated load with strong short-term overload capacity, suitable for load fluctuations in 15kV distribution networks.
4. Robust Structure, Comprehensive Protection: Tank made of high-quality cold-rolled steel plate with good sealing and vibration resistance. Outdoor units are rain, dust, and corrosion resistant; indoor units are compact and aesthetically pleasing, suitable for various complex high-voltage scenarios.
5. Maintenance-Free, Long Service Life: Fully sealed structure reduces insulating oil oxidation, resulting in low maintenance frequency. Service life ≥ 25 years under normal maintenance conditions, reducing replacement and operational costs.
6. Easy Installation, Wide Versatility: Supports indoor/outdoor, floor/pole mounting. Can be directly connected to 15kV distribution networks with strong compatibility, convenient installation and commissioning.
Our Advantages
1. Strong Customization Capability: Capacity, voltage, protection grade, etc., can be customized according to needs, suitable for special conditions such as high altitude and low temperature, as well as new energy and industrial scenarios.
2. Standardized Production & Strict Quality Control: Standardized production with quality control throughout the entire process and multiple inspections ensures consistent product performance. A complete factory test report is provided for each unit.
3. Complete Qualifications: Possesses CCC, ISO certifications, and type test reports, meeting grid connection and project acceptance requirements.
4. Stable Delivery & Comprehensive Support: Stable delivery times, supporting expedited orders. Provides transportation, installation guidance, and commissioning services, ensuring power supply continuity.
5.Complete After-Sales Service: Provides full lifecycle support including technical training, inspections, and fault handling. Localized teams improve response efficiency.
Ordering Guide
Please provide the following information when ordering to ensure accurate product matching:
1. Specify the required rated capacity, input voltage (15kV)/output voltage, frequency, and connection symbol to define core power requirements.
2. Describe the operating environment (indoor/outdoor, altitude, temperature, humidity, etc.) and any special requirements such as corrosion protection or anti-freezing.
3. Determine the cooling method, insulating oil type, impedance voltage, and energy efficiency level to match actual operating conditions.
4. Provide installation method, cable entry/exit method, and switchgear room layout requirements to optimize the installation plan.
5. Specify any special functional requirements such as tap-changers, temperature measurement devices, etc., to meet individual usage needs.
