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
⚡
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.
🌡️
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
🏭
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.
☀️
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.
❓ Frequently Asked Questions
Q
What does the model number S13-M-100/10 mean?
The model code breaks down as follows: S = Three-Phase, 13 = Efficiency Class (GB 20052-2024), M = Hermetically Sealed (oil-immersed), 100 = Rated Capacity (100 kVA), and 10 = High-Voltage Rated Voltage (10 kV). Custom configurations are available upon request.
Q
What is the difference between S13 and S15 efficiency classes?
The S15 class meets GB 20052-2024 Class 1 standards and delivers 15–20% lower no-load and load losses compared to the S13 class (Class 2). S15 is recommended for applications with high continuous-duty cycles where long-term energy savings are a priority.
Q
Can the transformer operate at high altitudes above 1000m?
Yes. The standard rating is for altitudes up to 1000m. For higher altitudes, derating applies: approximately 5% at 1500m and 10% at 3000m. Custom high-altitude versions are also available to maintain full rated capacity at elevated locations.
Q
Is this transformer suitable for use with solar or wind power systems?
Absolutely. The transformer is designed to integrate seamlessly with solar PV farms and wind power plants, converting variable renewable energy output into stable, grid-compatible electricity. Its high efficiency and robust thermal design make it ideal for renewable energy applications.
Q
What customization options are available?
A wide range of customizations are supported, including special voltage ratios (110V–33kV), capacity ranges (5kVA–5MVA), enclosure protection levels (IP23–IP65), anti-freeze additives for cold climates (-40°C), explosion-proof enclosures, and single-phase configurations. All custom units are verified by third-party laboratories.
Q
What international standards does this transformer comply with?
The transformer complies with multiple international and domestic standards, including IEC 60076-1 (general requirements), IEC 60076-11 (IE2/IE3 efficiency equivalents for EU markets), GB 20052-2024 (Chinese energy efficiency standard), ANSI/IEEE standards, and GB 50260-2013 for seismic resistance. This ensures suitability for both domestic and global markets.