The SFZ-80000-121±2×2.5%/11 is an 80MVA high-performance transformer designed for 121kV/11kV voltage conversion, featuring on-load tap changing (OLTC) with ±2×2.5% regulation. Compliant with IEC 60076 and IEEE C57.12 standards, it incorporates:

• ✔ Low-loss silicon steel core (no-load loss ≤45kW) for >99.4% efficiency
• ✔ ONAN/ONAF cooling with 65°C average winding temperature rise
• ✔ Short-circuit impedance 10.5% for grid stability

Ideal for substation upgrades and industrial power systems, it offers 40-year design life. Custom configurations available.

• Ultra-High Efficiency Power Transformer

  Our SFZ-80000-121±2×2.5%/11 power transformer delivers exceptional >99.4% efficiency through advanced silicon steel core technology, reducing no-load losses to just 45kW. This electrical transformer is ideal for both step-up and step-down applications in utility and industrial systems. As leading power transformer suppliers, we offer this model with 15% lower operating costs than conventional units. Buy power transformer online with confidence through our certified platform.

• Precision Voltage Regulation

  Featuring ±2×2.5% on-load tap changer, this step-up/step-down transformer provides 0.625% voltage adjustment precision. The 10.5% short-circuit impedance ensures grid stability, with KEMA-certified performance. We've successfully delivered 30+ units globally as trusted ODM/OEM transformer partners. Request your transformer price list today for project budgeting.

• Robust Cooling & Extended Lifespan

  The dual ONAN/ONAF cooling system maintains safe operating temperatures (-25°C to 50°C range) with just 65K winding temperature rise. Our custom power transformer solutions incorporate H-class insulation for 40+ year service life.

• Global Certifications & Smart Features

  UL/cUL/CE certified and compliant with IEC/IEEE/GB standards, this transformer meets worldwide requirements. As professional power transformer suppliers, we offer 14-week lead times for most custom power transformer configurations.

• Heavy-Duty Industrial Protection

  The reinforced tank with C5-M anti-corrosion coating withstands harsh environments, while <68dB noise meets strict regulations. Proven in 50+ installations across Southeast Asia's mining sector, with 5+ years of trouble-free operation.

Here are four specific application scenarios of Power Transformer:

1. Utility Grid Substations
   The SFZ-80000-121±2×2.5%/11 transformer is ideally deployed in 110kV/220kV substations for voltage conversion between transmission and distribution networks. Its ±2×2.5% on-load tap changer ensures precise voltage regulation during peak demand fluctuations. With 10.5% short-circuit impedance and <45kW no-load loss, it enhances grid stability while minimizing energy waste in 24/7 operation.
2. Industrial Power Plants
   This transformer excels in heavy industries like steel mills and aluminum smelters, where its reinforced construction withstands harmonic-rich loads. The ONAN/ONAF cooling maintains stable operation in high-temperature environments, while the 80MVA capacity supports intensive production lines.
3. Renewable Energy Integration
   Perfect for wind/solar farm collector stations, the transformer's wide voltage adjustment range (±2×2.5%) accommodates renewable generation variability. Its 65K temperature rise design handles intermittent overloads.
4. Urban Power Infrastructure
   The compact design and <68dB noise level make this transformer suitable for urban substations near residential areas. Its C5-M corrosion protection ensures reliable performance in coastal cities, while the 40-year lifespan reduces replacement frequency in crowded metropolitan grids. Currently deployed in 15+ Asian megacity projects.
5. Petrochemical Complexes
   The explosion-proof design and anti-corrosion coating meet strict safety requirements for oil refineries and chemical plants. The transformer's high short-circuit withstand capability (verified by KEMA testing) provides crucial protection against grid disturbances in hazardous environments.

Below are generic installation and use instructions for 110kV class power transformers:

1. Lifting and Jacking of Transformer Body
   Use only the designated lifting lugs and follow the manufacturer’s instructions for hoisting. Ensure the transformer is balanced and avoid sudden movements. Jacking should be performed at specified points to prevent deformation.
2. Transportation and Handling
   Secure the transformer firmly during transport. Avoid excessive vibration and impact. Use appropriate equipment for loading and unloading, and always keep the transformer upright.
3. Check and Acceptance
   Upon arrival, inspect the transformer for physical damage, verify all accessories and documentation, and check for oil leaks. Record any discrepancies and notify the supplier if necessary.
4. Storage and Keeping of Product (Body and Component)
   Store the transformer in a dry, well-ventilated area. Protect from moisture, dust, and mechanical damage. Keep components in their original packaging until installation.
5. Overall Reassembly on Site
   Assemble all external parts and accessories according to the manufacturer’s instructions. Ensure all gaskets and seals are properly installed to prevent leaks.
6. Vacuum Oil Filling
   Vacuum oil filling must be conducted after general assembly of the transformer has been fully completed. Remove air and moisture by maintaining the required vacuum level and fill with filtered transformer oil as specified.
7. External Surface Cleaning and Painting Makeup of Transformer
   Clean all external surfaces to remove dust and contaminants. Touch up paint as needed to protect against corrosion.
8. Check and Handover Test Before Commissioning
   Conduct electrical and mechanical tests according to standards (such as insulation resistance, turns ratio, polarity, and functional checks). Ensure all results meet acceptance criteria before energizing.
9. Operation
   Operate the transformer within its rated parameters. Monitor temperature, oil level, and load regularly. Follow proper procedures for energizing and de-energizing.
10. Inspection and Maintenance
    Perform routine inspections for leaks, unusual noises, and overheating. Schedule periodic maintenance such as oil testing, bushing inspection, and cleaning to ensure reliable operation.