Product Description
The S20 series 10kV oil-immersed three-phase distribution transformers manufactured by Yueqing Jasco Electric are widely used in urban and rural grid upgrades, photovoltaic power plants, industrial parks, commercial districts, and overseas power infrastructure projects.
These high-efficiency, energy-saving products feature reduced no-load losses and no-load currents, representing an upgrade over the S13 series.
This series utilizes high-permeability grain-oriented silicon steel sheets and an optimized multi-step core structure. Compared to S11 and S13 models, it offers superior energy efficiency, effectively lowering long-term operating costs for power projects.
The S20 series features a fully sealed corrugated tank design, eliminating the need for an oil conservator. The corrugated fin structure accommodates oil volume fluctuations caused by temperature changes and isolates the oil from the atmosphere, thereby delaying oil aging and reducing maintenance requirements.
The high-voltage windings employ a cylindrical structure, while the low-voltage windings use either foil or cylindrical designs. Reinforced winding structures ensure excellent short-circuit withstand capability, effectively resisting electromagnetic forces generated by short-circuit fault currents.
Utilizing a Class A insulation system and an optimized magnetic circuit design, the series operates with low noise levels. The off-circuit tap changer supports voltage regulation ranges of ±5% or ±2×2.5%, stabilizing the 0.4kV output voltage amidst grid fluctuations.
The products are available with Dyn11 and Yyn0 vector groups; the Dyn11 configuration suppresses zero-sequence harmonics and accommodates unbalanced single-phase loads as well as non-linear loads.
With a capacity range spanning 30 kVA to 2500 kVA, the series utilizes ONAN (Oil Natural Air Natural) cooling and complies with IEC 60076 and GB/T 1094 standards. Each unit undergoes comprehensive factory acceptance testing prior to shipment.
Product Specification
|
Performance Category |
Characteristic Description |
|
Energy Saving |
Ultra-low loss silicon steel core; much lower no-load loss than S11 & S13, reduces long-term power cost. |
|
Short-circuit Resistance |
Reinforced foil/cylindrical winding, strong resistance against short-circuit electromagnetic impact. |
|
Sealing & Maintenance |
Conservator-free fully sealed corrugated tank. Oil separated from air, slow aging, minimal maintenance. |
|
Voltage Regulation |
Off-circuit tap ±5% / ±2×2.5%. Stabilizes 0.4kV output under grid voltage fluctuation. |
|
Load Adaptability |
Optional Dyn11/Yyn0. Dyn11 restrains harmonics and tolerates unbalanced single-phase loads. |
|
Noise & Insulation |
Optimized core stacking for low running noise. Class A insulation meets 10kV dielectric test requirements. |
|
Cooling Method |
ONAN natural oil-air cooling, no auxiliary fan required under rated load. |
Product Advantages
Ultra-low energy consumption and high efficiency
Utilizes high-quality grain-oriented silicon steel sheets and a "step-lap" core structure. No-load losses are significantly lower than those of S11/S13 models, effectively reducing energy consumption and long-term operating costs.
Exceptional short-circuit withstand capability
Features a reinforced cylindrical or foil winding structure. An optimized mechanical design enables the transformer to withstand the immense electromagnetic forces generated during short-circuit faults, preventing winding deformation.
Fully sealed corrugated tank; low maintenance requirements
Eliminates the need for an oil conservator; corrugated cooling fins compensate for the thermal expansion and contraction of the oil. Isolating the insulating oil from the air slows oil aging and reduces routine maintenance.
Excellent voltage and load adaptability
Equipped with an Off-Circuit Tap Changer (OCTC) offering adjustment ranges of ±5% or ±2×2.5%. Available connection groups include Dyn11 or Yyn0. The Dyn11 configuration eliminates zero-sequence harmonic components, effectively handling single-phase unbalanced loads and non-linear loads.
Low noise and reliable insulation
Employs Class A insulation and an optimized core design to minimize magnetostriction effects and operating noise. The product fully complies with power-frequency withstand voltage and impulse withstand voltage (lightning impulse) test requirements.
Strict quality control and wide range of applications
Capacity range: 30–2500 kVA; Cooling method: ONAN (Oil Natural Air Natural). Complies with IEC 60076 and GB/T 1094 standards. Each transformer undergoes comprehensive Factory Acceptance Testing (FAT) prior to shipment.
Operating Environment Conditions
- Ambient temperature: Maximum ambient air temperature: +40 °C Minimum ambient air temperature: ‑25 °C 24‑hour average ambient temperature: ≤ +30 °C Annual average ambient temperature: ≤ +20 °C
- Altitude: ≤1000 m above sea level. Special customized design is required if operating altitude exceeds 1000 m.
- Installation location: For outdoor installation. The site shall be free from severe mechanical vibration and violent shock.
- Atmospheric conditions: Ambient air shall not contain corrosive gas, conductive dust, flammable or explosive substances. Relative air humidity: ≤95% at +25 °C, no condensation allowed.
- Special requirement: If on‑site operating conditions deviate from the above‑mentioned scope, please notify JASCO in advance for tailor‑made solution.
FAQ
Hot Tags: s20 10kv oil‑immersed transformer, China s20 10kv oil‑immersed transformer manufacturers, suppliers, factory
