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>> Product Introduction
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.
Product Advantage
1. Ultra-High Efficiency Power Transformer
Our SFZ-80000-121±2×2.5%/11 power transformer delivers exceptional >99.4% efficiency through advancedsilicon 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.
2. 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.
3. 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.
4. 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.
5. 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.
>> Technical Parameters
| Type | Step downpower transformer |
| Model | SFZ80000-121±2*2.5%/11 |
| Cooling Method | ONAF |
| Primary Voltage | 121kV |
| Secondary Voltage | 11kV |
| Rated Frequency | 50HZ |
| Rated Power | 80MVA |
| Winding Material | Copper |
| Voltage Regulation | OLTC |
| Tapping Range | ±2×2.5% |
| Connection Group | YNd11 |
| Transformer Dimension | 6900×5800×6120mm |
| Weight | 72000kg |
>> Product Uses
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.
>> Product Operate Guide
Generic installation and use instructions for 110kV class power transformers, containing the following sections:
1. Lifting and jacking of transformer body
2. Transportation and handling
3.Check and acceptance
4.Storage and keeping of product (body and component)
5.Overall reassembly on site
6.Vacuum oil filling: vacuum oil filling must be conducted after general assembly of the transformer has been fully completed.
7.External surface cleaning and painting makeup of transformer
8.Check and handover test before commissioning
9.Operation
10. Inspection and maintenance
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