High-Efficiency Stacked Core Transformer - China Suppliers & Factory 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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⚡1. 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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🌡️2. Strong Thermal Stability Advanced heat-dissipating design enables reliable work in -20°C to 60°C, avoiding overheating issues.
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🔧3. 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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🛡️4. 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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1. 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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2. 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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3. 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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4. 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
Q What does the S13 transformer model number mean?
The model number is structured as follows: S = Three-Phase, 13 = Efficiency Class (GB 20052-2024 Class 2), M = Hermetically Sealed, followed by rated capacity in kVA and HV rated voltage in kV. For example, S13-M-100/10 denotes a three-phase, hermetically sealed, 100kVA, 10kV transformer of efficiency class 13.
Q What is the difference between S13 and S15 efficiency classes?
The S15 class meets GB 20052-2024 Class 1 efficiency requirements, achieving 15–20% lower losses compared to the S13 (Class 2). For EU markets, S13 is equivalent to IE2 and S15 to IE3 under IEC 60076-11. Choosing S15 results in greater long-term energy savings and lower operating costs.
Q Can the transformer operate in high-altitude or extreme temperature environments?
Yes. The standard rating covers altitudes up to 1000m and ambient temperatures from -25°C to 40°C. For high-altitude installations (e.g., 1500m = 5% derating, 3000m = 10% derating) or extreme cold down to -40°C (with anti-freeze additive), customized versions are available. Please specify your site conditions when ordering.
Q Is customization available for special voltage or capacity requirements?
Absolutely. The transformer supports flexible voltage configurations from 110V to 33kV and capacities from 5kVA to 5MVA. Enclosure protection levels from IP23 to IP65 are also available. Explosion-proof versions and special connection groups can be engineered upon request, with all custom parameters verified by third-party laboratories.
Q What standards does this transformer comply with?
This transformer complies with GB 20052-2024 (China efficiency standard), IEC 60076-1 (general requirements), IEC 60076-11 (dry-type transformers), and GB 50260-2013 (seismic resistance, 7-degree intensity / 0.15g). It is also equivalent to IEC IE2/IE3 levels for European market requirements.
Q What is the expected service life and noise level of this transformer?
Designed for a service life of 25+ years under normal operating conditions, this transformer produces less than 55dB of operational noise, making it suitable for noise-sensitive environments such as commercial buildings and residential communities. Regular maintenance per the manufacturer's guidelines will help achieve maximum service life.