Product Overview
The 6kV oil-immersed transformer is a general-purpose indoor/outdoor oil-immersed power transformer suitable for three-phase AC 50Hz, rated voltage 6kV power transmission and distribution systems. It is widely used in industrial and mining enterprises, urban power grids, industrial parks, residential areas, water conservancy, rail transit, petrochemical, metallurgical, and other locations. Its main functions include voltage transformation, power distribution, system voltage stabilization, and power transmission, meeting the needs of various power scenarios such as power distribution, motor power, lighting, and reactive power compensation.
The product adopts a fully sealed or non-sealed structure. The core uses high-quality cold-rolled grain-oriented silicon steel sheets, and the windings are made of high-strength enameled copper or aluminum wire. It is equipped with an efficient heat dissipation and insulating oil system, featuring low loss, low noise, strong overload capacity, excellent insulation performance, stable operation, and long service life. It complies with national standards GB 1094.1～1094.5, GB/T 6451, and has passed CCC compulsory certification and ISO quality system certification. It is a safe and reliable core power transformation device for 6kV distribution networks.
Operating Environment
1. Ambient temperature: -25℃～+40℃, with a 24-hour average temperature ≤ +35℃
2. Altitude: ≤1000m; customizable for up to 3000m under special conditions
3. Relative humidity: Daily average ≤ 95%, monthly average ≤ 90%, without severe condensation or standing water
4. Installation site: No violent vibration, no corrosive gases, no flammable or explosive dust, no conductive dust
5. Outdoor units can withstand rain, snow, sand, sunlight, and other natural environments; indoor units require good ventilation
6. Installation inclination: Angle between the unit body and vertical plane ≤ 3°
Technical Parameters
Item | Unit | Parameters |
|---|---|---|
Rated Voltage | kV | 6±5%/0.4 |
Rated Frequency | Hz | 50 |
Rated Capacity | kVA | 30, 50, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1000, 1250, 1600 |
Number of Phases | --- | Three-phase |
Connection Symbol | --- | Dyn11 (common), Yyn0 |
Cooling Method | --- | ONAN (Oil Natural Air Natural) |
Insulation Level | kV | Power frequency withstand voltage 35kV/1min; induced withstand voltage |
Impedance Voltage | % | 4.0%, 4.5%, 6.0% (matched according to capacity) |
Noise Level | dB | ≤55～65 (depending on capacity) |
Protection Grade | --- | Indoor IP20; Outdoor IP33 |
Insulating Oil | --- | 25# transformer oil (45# customizable) |
Product Features
1. High Efficiency, Low Loss, Significant Energy Savings: Uses high-permeability grain-oriented silicon steel sheets, stepped core joints, and fully inclined core structure to effectively reduce no-load loss and noise; optimized winding conductor cross-sections reduce load loss, significantly saving electricity costs over long-term operation, meeting national secondary energy efficiency standards.
2. Reliable Insulation, Safe and Stable: Multiple insulation structures for windings and core; insulating oil provides insulation, heat dissipation, and arc extinguishing functions; overall vacuum oil filling process reduces bubbles and impurities, resulting in high insulation strength, strong short-circuit withstand capability, and resistance to aging over long-term operation.
3. Excellent Heat Dissipation, Strong Overload Capacity: Corrugated tank, tube, or fin-type radiator structure provides large cooling surface area and low temperature rise; allows stable long-term operation at rated load, with short-term overload capacity meeting sudden peak power demands.
4. Robust Structure, Effective Protection: Tank made from high-quality steel plates welded for high strength and good sealing, preventing leakage and vibration; outdoor units feature rain shields and anti-oil-fouling design; indoor units are compact and aesthetically pleasing, adapting to different installation environments.
5. Maintenance-Free Operation, Long Service Life: Fully sealed structure slows insulating oil oxidation, reducing maintenance frequency; robust design ensures long service life, typically over 20 years under normal maintenance conditions.
6. Easy Installation, Strong Versatility: Moderate size and stable center of gravity, supporting indoor/outdoor, floor/pole mounting; can be directly connected to 6kV distribution networks, used with switchgear and distribution cabinets, offering strong system compatibility.
Our Advantages
1. Strong customization capability, tailored by capacity, voltage, connection type, cooling method, protection grade to meet special operating conditions.
2. Standardized production line with strict quality control, from raw materials, core, windings to final assembly and testing, ensuring high product consistency.
3. Provides complete type test reports, factory test reports, CCC certification, and other qualification documents, meeting grid and project acceptance requirements.
4. Stable delivery times, supporting expedited production; provides transportation, on-site installation guidance, and commissioning services.
5. Comprehensive after-sales system, offering technical training, regular inspections, fault handling, oil testing and replacement, and full lifecycle support.
Ordering Guide
Please provide the following information when ordering:
1. Rated capacity, input voltage, output voltage, frequency, and connection symbol.
2. Operating environment (indoor/outdoor, altitude, temperature, humidity, corrosion protection requirements, etc.).
3. Cooling method, insulating oil type, impedance voltage, energy efficiency level requirements.
4. Installation method (floor mounting, pole mounting) and cable entry/exit method.
5. Special requirements: such as tap-changer positions, temperature measurement device, pressure relief valve, oil level gauge, thermostat, etc.
