PRODUCT
S20 series oil immersed transformer
Oil-immersed Transformer S20-M
Full Technical Parameters (Standard Version)
1. General Data
– Type: Oil-immersed, fully sealed, S20 energy-saving type – Phase: 3-phase
– Frequency: 50 Hz – Rated Voltage (HV): 10 kV, 11 kV
– Rated Voltage (LV): 0.4 kV (400/230 V) – Connection Group: Dyn11 (standard)
– Cooling Method: ONAN (Oil Natural Air Natural) – Insulation Class: A
– Service Conditions: Indoor / Outdoor
2. Rated Capacity Range
100, 200, 315, 400, 500, 630, 800, 1000, 1250, 1600, 2000 kVA
3. Voltage & Taps
– HV Tap Changer: Off-circuit tap changer (no-load) – Tap Range: ±2×2.5%
– Voltage Regulation Accuracy: ±0.5%
4. Losses (S20 GB Standard)
– 100 kVA: No-load Loss 135 W, Load Loss 1265 W, No-load Current 0.7%
– 200 kVA: No-load Loss 240 W, Load Loss 2000 W, No-load Current 0.65%
– 315 kVA: No-load Loss 300 W, Load Loss 2900 W, No-load Current 0.6%
– 400 kVA: No-load Loss 370 W, Load Loss 3615 W, No-load Current 0.55%
– 500 kVA: No-load Loss 430 W, Load Loss 4330 W, No-load Current 0.55%
– 630 kVA: No-load Loss 510 W, Load Loss 5280 W, No-load Current 0.5%
– 800 kVA: No-load Loss 630 W, Load Loss 6000 W, No-load Current 0.5%
– 1000 kVA: No-load Loss 750 W, Load Loss 7360 W, No-load Current 0.45%
– 1250 kVA: No-load Loss 900 W, Load Loss 8900 W, No-load Current 0.45%
– 1600 kVA: No-load Loss 1120 W, Load Loss 11000 W, No-load Current 0.4%
– 2000 kVA: No-load Loss 1360 W, Load Loss 13500 W, No-load Current 0.4%
5. Impedance Voltage
– ≤ 630 kVA: 4.0% – ≥ 800 kVA: 4.5%
6. Insulation Level
– HV: LI75AC35 (for 10 kV class) – LV: ≤ 2 kV
7. Temperature Rise
– Winding: 65 K – Top Oil: 55 K
– Ambient Temperature: -25°C ~ +40°C
8. Oil Tank & Structure
– Tank Material: Steel plate, welded, corrosion-resistant – Oil Type: Transformer oil 25#
– Sealing Type: Fully sealed structure – Corrosion Protection: Sandblasting + epoxy primer + topcoat
9. Accessories (Standard)
– Oil level indicator – Pressure relief valve
– Thermometer pocket – Earthing bolt
– HV / LV bushing – Lifting lugs
– Nameplate
10. Standards Compliance
– IEC 60076
– GB/T 1094 – GB/T 6451-2023
– GB 20052-2024 (Energy efficiency Level 2)
11. Protection Class
– IP00 (open type) – IP20 (with enclosure, optional)
Application scope:
residential areas, commercial streets, towns and villages, power grid renovation, mountainous areas, metallurgy, machinery manufacturing, precision electronics, high-speed blast furnaces, tru, airports, ports, small and medium-sized photovoltaics, wind power, energy storage projects, hospitals, data centers, schools.
Application Range of S20 Oil-Immersed Transformer
S20 series fully sealed oil-immersed distribution transformers are high-efficiency, low-loss, energy-saving electrical equipment designed in accordance with national and international standards. With stable performance, high reliability, and long service life, they are widely applied in power transmission and distribution systems, industrial and mining production, commercial facilities, public utilities, infrastructure construction, and new energy projects.
1. Power Grid & Power Supply Systems
– Urban and rural power grid reconstruction, expansion, and upgrading projects
– Power supply bureaus, distribution stations, switching stations, and box-type substations
– Residential power distribution, industrial power supply, and public network power supply
– Places requiring long-term, stable, low-loss operation and high power supply quality
2. Industrial & Manufacturing Fields
– Various factories such as metallurgy, chemical industry, textile, paper making, cement, and machinery manufacturing
– Mine enterprises, underground or open-pit mining power distribution systems
– Industrial parks, development zones, and integrated industrial power supply platforms
– High-load, continuous-operation production lines and power distribution rooms
3. Commercial & Civil Construction
– Large commercial complexes, shopping malls, supermarkets, hotels, and office buildings
– Residential quarters, high-rise buildings, and real estate supporting power supply
– Schools, hospitals, stadiums, and cultural and medical facilities
– Railway stations, airports, bus stations, ports, and other transportation hubs
4. Infrastructure & Public Utilities
– Water supply and drainage pumping stations, sewage treatment plants
– Oil and gas stations, communication base stations, and data center power supply
– Road lighting, municipal engineering, and various public infrastructure
– Places with high requirements for safety, environmental protection, and energy saving
5. New Energy & Renewable Energy Projects
– Photovoltaic power stations, wind power generation supporting step-up / step-down transformers
– Energy storage systems and microgrid power distribution applications
– Green buildings, low-carbon parks, and energy-saving demonstration projects
6. Special & General Application Scenarios
– Suitable for indoor, outdoor, and exposed installation environments
– Applicable to areas with high requirements for no-load loss and operation cost
– Adaptable to conventional and slightly harsh natural environments
– Various three-phase AC 50Hz power distribution systems with rated voltage up to 10kV class
S20 transformers effectively reduce power loss during operation, lower operating costs, and meet the development needs of energy conservation, emission reduction, and green electricity, making them the preferred choice for modern power distribution systems.
