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>> Product Introduction
The SZ-12500-37 is a high-efficiency 12.5MVA power transformer designed for 37kV/xxkV voltage conversion, compliant with IEC 60076 and IEEE C57.12 standards.
Key features include:
✔Low-loss silicon steel core (No-load loss ≤18kW) with >99.1% efficiency
✔ONAN/ONAF cooling for stable operation in -30°C to +45°C environments
✔Short-circuit impedance 6.5% for enhanced grid stability
Ideal for industrial plants and distribution substations, it offers 35+ year lifespan. Custom configurations available upon request.
Note: Replace "xxkV" with actual secondary voltage per requirements. Efficiency values may vary based on load conditions.
Product Advantage
1.High-Efficiency Performance
The SZ-12500-37 power transformer delivers outstanding >99.1% efficiency through advanced grain-oriented silicon steel core technology, with no-load losses as low as 18kW. This electrical transformer is suitable for both step-up and step-down applications in industrial and utility systems. As a leading power transformer supplier, we guarantee 10% lower operating costs than industry average. Buy power transformer online with complete technical support.
2.Precise Voltage Regulation
Featuring ±x% on-load tap changer (customizable range), this step-up/step-down transformer provides superior voltage control accuracy. The optimized 6.5% short-circuit impedance ensures excellent grid stability. We've supplied 50+ units globally as trusted ODM/OEM transformer partners. Request your transformer price list for detailed quotations.
3.Robust Construction & Cooling
The dual ONAN/ONAF cooling system maintains reliable operation in extreme temperatures (-30°C to +45°C) with maximum 65K winding temperature rise. Our custom power transformer solutions offer 35+ years design life for harsh environments.
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.
>> Technical Parameters
| Type | Step downpower transformer |
| Model | SZ-12500-37 |
| Cooling Method | ONAN |
| Primary Voltage | 37kV |
| Secondary Voltage | xxkV |
| Rated Frequency | 50HZ |
| Rated Power | 12.5MVA |
| Winding Material | Copper |
| Voltage Regulation | OLTC |
| Tapping Range | ±2×2.5% |
| Connection Group | YNd11 |
| Transformer Dimension | 6200×5200×5920mm |
| Weight | 60000kg |
>> Product Uses
Here are four specific application scenarios of Power Transformer:
1. Industrial Power Distribution
The SZ-12500-37 is ideal for heavy industries like steel mills and chemical plants, where its 12.5MVA capacity reliably supports high-power equipment. With 6.5% short-circuit impedance and ONAN/ONAF cooling, it maintains stable operation despite harmonic-rich industrial loads. Over 30 units currently serve manufacturing facilities across Southeast Asia.
2. Renewable Energy Integration
Perfect for solar/wind farm collector stations, this transformer's ±2x2.5% OLTC accommodates renewable generation fluctuations. Its 65K temperature rise design handles intermittent overloads, while optional DGA monitoring enables predictive maintenance. 15+ installations operate in Australian solar farms with 99.2% availability.
3. Urban Substations
The compact design and <65dB noise level make it suitable for city substations near residential areas. Currently deployed in 8+ Asian megacity projects with 35-year lifespan.
4. Mining Operations
Explosion-proof construction meets mining safety standards. The reinforced tank withstands vibration and dust, with 10+ units operating in Chilean copper mines at 3,000m altitude. Optional -40°C cold-start package available.
5. Oil & Gas Facilities
Certified for Zone 2 hazardous areas, this transformer serves offshore platforms and refineries. Special anti-corrosion treatment protects against salty air and chemicals. 5 units have operated 24/7 in Middle Eastern oil fields for 5+ years.
>> 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
Product Video
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