High-Efficiency Stacked Core Transformer from China Factory - Top Suppliers for Industrial Power Supply Solutions
Product Specification
| Basic Information | ||
| Item | Specification | |
| Product Model | Example: S13-M-100/10 (S=Three-Phase, 13=Efficiency Class, M=Hermetically Sealed, 100=Rated Capacity kVA, 10=HV Rated Voltage kV) | |
| Rated Capacity（Sn） | 50kVA~2500kVA (ONAN: 100% rated capacity; ODAF: 130% rated capacity) | |
| Phase | Three-Phase (Standard) / Single-Phase (Customizable) | |
| Rated Frequency（fn） | 50Hz / 60Hz (±1% tolerance) | |
| Connection Group | Dyn11 (Default) / Yyn0 (Optional, per IEC 60076-1) | |
| Environmental & Operating Conditions | ||
| Ambient Temperature | -25℃~40℃ (-40℃ optional with anti-freeze additive) | |
| Altitude | ≤1000m (5% derating at 1500m, 10% at 3000m) | |
| Humidity | ≤90% @25℃ (no condensation); ≤50% @40℃ | |
| Seismic Resistance | GB 50260-2013, 7-degree intensity (0.15g acceleration) | |
| Protection Class | IP20 (Indoor) / IP23 (Outdoor, dust/rain protection) | |
| Losses & Impedance (Efficiency Core) | ||
| Parameter | S13-100/10 Example | Test Conditions |
| No-Load Loss (Po) | ≤170W | Rated voltage, rated frequency |
| Load Loss (Pk) | ≤1050W | Rated current, 75℃ reference temp |
| Short-Circuit Impedance (Uk%) | 4%~6% | ±10% tolerance at 75℃ |
| No-Load Current (Io%) | ≤1.2% (≤0.8% for large capacity) | Rated voltage |
| Efficiency Compliance: GB 20052-2024 Class 2 (S13) / Class 1 (S15, 15-20% lower losses than S13) — IEC 60076-11 IE2/IE3 equivalent for EU markets | ||
| Example S13-250/10 Key Specs | ||
| Item | Value | |
| Rated Capacity | 250kVA | |
| HV/LV Voltage/Current | 10kV/14.43A；0.4kV/360.8A | |
| No-Load/Load Loss | ≤320W / ≤2250W | |
| Short-Circuit Impedance | 4.5% | |
| Core Material | 30Q130 Silicon Steel | |
| Cooling Method | ONAN | |
| Protection Class | IP23 | |
| Customization available for special voltages, high-altitude, or explosion-proof requirements. All parameters verified by third-party labs. | ||
Advantages
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⚡Superior Energy Efficiency
Laminated structure with high-grade grain-oriented silicon steel minimizes eddy current and hysteresis losses, achieving up to 98% efficiency—cuts energy consumption and operational costs long-term.
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🌡️Strong Thermal Stability
Advanced heat-dissipating design enables reliable work in -20°C to 60°C, avoiding overheating issues.
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🔧High Customizability
Flexible voltage (110V-33kV), capacity (5kVA-5MVA), and enclosure (IP23-IP65) options fit industrial, renewable energy, and commercial needs.
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🔇Durable & Low-Noise
Compliant with IEC/ANSI standards, it has a 25+ year lifespan and <55dB noise, ensuring long-term stable, quiet operation.
Product Display
Application
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Industrial Sector
Powers heavy machinery (e.g., manufacturing assembly lines, metal processing equipment), industrial control systems, and factory power distribution networks—handles fluctuating loads stably to ensure uninterrupted production.
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Renewable Energy Systems
Integrates with solar photovoltaic (PV) farms and wind power plants, converting unstable renewable energy into grid-compatible electricity for efficient power transmission to the public grid.
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Commercial & Residential Areas
Supplies power to commercial buildings (shopping malls, office towers) and residential communities, supporting HVAC systems, lighting, and household/appliance electrical needs with low noise and high efficiency.
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Power Transmission & Distribution
Used in medium/high-voltage power grids (e.g., regional substations), stepping up/down voltages to match long-distance transmission and end-user demand, ensuring safe and efficient power supply.
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Frequently Asked Questions
Q1
What is the difference between S13 and S15 oil-immersed transformers?
The S13 series complies with GB 20052-2024 Class 2 efficiency standards, while the S15 series meets Class 1 standards with 15–20% lower no-load and load losses compared to S13. S15 is recommended for applications requiring maximum energy savings and long-term cost reduction.
Q2
Can the transformer be used at high altitudes above 1000m?
Yes. The standard rating applies at ≤1000m. For higher altitudes, derating is required: approximately 5% at 1500m and 10% at 3000m. Customized high-altitude versions are available upon request to ensure safe and reliable operation.
Q3
What customization options are available for this transformer?
We offer a wide range of customization options including voltage ratings (110V–33kV), capacity (5kVA–5MVA), connection groups (Dyn11, Yyn0, etc.), protection class (IP23–IP65), cooling methods (ONAN/ODAF), anti-freeze additives for cold climates, and explosion-proof enclosures for hazardous environments.
Q4
What international standards does this transformer comply with?
The transformer complies with GB 20052-2024 (China national efficiency standard), IEC 60076-1 (general requirements), IEC 60076-11, and is equivalent to IE2/IE3 efficiency classes for EU markets. Seismic resistance meets GB 50260-2013 at 7-degree intensity (0.15g acceleration).
Q5
Is this transformer suitable for solar and wind energy applications?
Yes. This transformer is well-suited for renewable energy systems including solar photovoltaic (PV) farms and wind power plants. It efficiently converts variable renewable energy output into stable, grid-compatible electricity, supporting reliable power transmission to the public grid.
Q6
What is the expected service life and noise level of this transformer?
When operated within rated conditions and maintained properly, the transformer is designed for a service life of 25+ years. The noise level is kept below 55dB, making it suitable for use in noise-sensitive environments such as commercial buildings and residential communities.