High-Efficiency Stacked Core Transformer from China Suppliers - Durable Factory Solution for Industrial Power Supply
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.
High Customizability
Flexible voltage (110V-33kV), capacity (5kVA-5MVA), and enclosure (IP23-IP65) options fit industrial, renewable energy, and commercial needs.
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.
Commercial & Residential
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.
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
What is the difference between S13 and S15 transformer models?
The S13 model complies with GB 20052-2024 Class 2 efficiency standards. The S15 model features Class 1 efficiency, delivering 15% to 20% lower energy losses than the S13, resulting in higher long-term energy savings.
Can these transformers be customized for special voltage and environment requirements?
Yes, full customization is available for special voltages (ranging from 110V to 33kV), capacities (5kVA to 5MVA), high-altitude operations, anti-freeze capabilities down to -40℃, and explosion-proof enclosures.
What cooling methods are utilized, and how do they affect capacity?
The standard cooling method is ONAN (Oil Natural Air Natural), which supports 100% rated capacity. With ODAF (Oil Directed Air Forced) cooling, the transformer capacity can be boosted up to 130% of its rated value.
What protection classes are available for indoor and outdoor installations?
We offer an IP20 protection class for indoor installations. For outdoor environments requiring dust and rain protection, an IP23 enclosure is standard, with options up to IP65 customizable for harsher environments.
What standards do these transformers comply with for international markets?
Our transformers are fully compliant with IEC 60076-1, GB 20052-2024, and equivalent EU market standards (IEC 60076-11 IE2/IE3). All performance metrics are verified by accredited third-party laboratories.