S20-2000KVA oil immersed transformer

　　Core Analysis of S20-2000KVA Oil-Immersed Transformers

　　I. Price Range and Influencing Factors

　　Mainstream Price Range

　　The price range for S20-2000KVA oil-immersed transformers is RMB 120,000 to RMB 204,100 per unit, with specific prices influenced by the following factors:

　　Brand and Model: Well-known brands (e.g., Jiaxing Electric, Jiangsu Juli) generally command higher prices due to mature technology and stable quality. For example:

　　Jiaxing Electric S20-M-2000KVA/10±2*2.5/0.4-NX2 (secondary energy efficiency, all-copper coil) costs approximately RMB 204,100;

　　Shandong Huaheng S20-2000KVA (10KV high-voltage, high-power) costs around RMB 117,600 (lower for bulk purchases);

　　Henan Shengzhiruinuo S20-2000KVA (all-copper winding, 10KV/0.4kV) starts at approximately RMB 120,000.

　　Material and Process: Transformers with all-copper coils, known for superior conductivity and longevity, are priced higher than those with aluminum coils. Secondary energy efficiency designs (compliant with GB20052 standards) reduce no-load and load losses by optimizing materials such as silicon steel sheets and oxygen-free copper conductors, increasing costs by approximately 10%-15%.

　　Customization Requirements: Specialized voltages (e.g., 35KV/0.4KV), connection groups (e.g., Dyn11), and protection ratings (e.g., IP23 outdoor type) drive up prices. For instance, Jiangsu Juli offers customization services for 35KV high-voltage transformers with capacities ranging from 30KVA to 31,500KVA.

　　Cost-Effectiveness Recommendations

　　Limited Budget: Opt for basic models from niche brands (e.g., Shandong Huaheng S20-2000KVA at approximately RMB 117,600), but verify certifications (e.g., CCC, PCCC) and after-sales support;

　　Long-Term Stability: Prioritize well-known brands with all-copper coils (e.g., Jiaxing Electric, Jiangsu Juli), priced between RMB 180,000 and RMB 200,000, with a lifespan of 25-30 years for lower overall costs;

　　Special Environments: For mining or outdoor applications, select models with high protection ratings (e.g., Jiangsu Juli's 35KV high-voltage transformers with rain and dust protection).

　　II. Technical Parameters and Performance Comparison

　　Basic Parameters

　　Capacity: 2000KVA (apparent power), with actual output power depending on load type:

　　Resistive loads (e.g., resistance furnaces): 2000KW;

　　Inductive loads (e.g., motors): 1600KW at a power factor of 0.8, or 1200KW at 0.6.

　　Voltage Ratio: Commonly 10/0.4KV (for low-voltage distribution networks) or 35/0.4KV (for medium- and high-voltage transmission), suitable for different scenarios.

　　Frequency: 50Hz (standard in mainland China).

　　Cooling Method: Oil-immersed natural cooling (ONAN), suitable for indoor/outdoor environments without additional cooling equipment.

　　Connection Group: Dyn11 (common for three-phase transformers), ensuring stable current transmission and reducing voltage fluctuations.

　　Performance Differences

　　Energy Efficiency: Secondary energy efficiency standards (compliant with GB20052) reduce no-load losses by over 30%, load losses by over 20%, and total losses by 25%, resulting in significant long-term energy savings.

　　Insulation Class: F-class (155°C) or H-class (180°C), suitable for high-temperature environments and extending service life.

　　Noise Control: High-quality models generate noise levels below 65dB (measured at 1 meter), meeting the requirements of quiet environments such as hospitals and schools.

　　Overload Capacity: Short-term overload capacity up to 1.5 times the rated capacity (sustained for 2 hours), accommodating load fluctuations.

　　III. Application Scenarios and Selection Recommendations

　　Typical Application Scenarios

　　Industrial Sector: Factory power distribution, large-scale machine tool power supply (e.g., Jiangsu Juli's 35KV high-voltage transformers support heavy-duty scenarios such as mines and steel plants);

　　Commercial Buildings: Power distribution for high-rise office buildings and shopping malls (recommended: installing smaller-capacity transformers on each floor to minimize fault impact);

　　Infrastructure: Data centers, hospitals, airports, and other scenarios requiring high power supply reliability;

　　New Energy Sector: Step-up transformers for wind and photovoltaic power plants (e.g., 35KV/0.4KV models).

　　Key Selection Considerations

　　Load Type: For frequent motor startups, reserve 20%-30% capacity margin;

　　Ambient Temperature: If temperatures consistently exceed 40°C, derate the transformer (reduce capacity by 5% for every 10°C increase) or opt for forced oil circulation cooling models;

　　Installation Space: Indoor installations require reserved maintenance channels (width ≥ transformer width + 1 meter), while outdoor installations necessitate an IP23 protection rating or higher;

　　Future Expansion: Reserve 10%-15% capacity margin to accommodate load growth.

　　IV. Market Trends and Purchase Recommendations

　　Industry Trends

　　Energy Efficiency: Secondary energy efficiency (S20) models are gradually replacing tertiary energy efficiency (S13) models, accounting for over 60% of the market share;

　　Intelligence: Some models integrate temperature control instruments and RS485 communication interfaces, supporting remote monitoring;

　　Customization: Growing demand for customized voltages, capacities, and protection levels, with niche brands offering faster response times.

　　Purchase Considerations

　　Certification Verification: Ensure products have CCC certification, PCCC certification, and that manufacturers hold ISO three-system certifications;

　　After-Sales Support: Prioritize brands offering 5-year warranties and 24-hour response services (e.g., Jiaxing Electric, Jiangsu Juli);

　　Transportation Costs: Large-capacity transformers require dedicated vehicle transportation; confirm whether freight is included (e.g., Henan Shengzhiruinuo supports freight-inclusive customization);

　　Installation Services: Some manufacturers provide free installation and commissioning (e.g., Jiangsu Juli), reducing long-term costs.