Jiangsu Huachen Transformer Co.,Ltd.
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The 110kV class oil-immersed energy-saving power transformer is a high-performance high-voltage power distribution equipment developed for medium and large-scale power transmission and distribution projects. This series features ultra-low loss, low noise, low temperature rise, high reliability, core-lifting-free maintenance and leakage-free design, with all performance indicators reaching the advanced level of similar domestic products. It can effectively reduce grid line loss and long-term operation costs, bringing significant economic benefits to project operators. The product adopts advanced winding and core design, with a rated voltage grade of 110kV, adapting to the strict requirements of high-voltage power transmission and distribution systems.
The 110kV class energy-saving power transformer adopts high-quality cold-rolled grain-oriented silicon steel sheet with full mitered lap stacking structure, greatly reducing no-load loss and no-load current. Its performance fully complies with GB20052-2020 energy efficiency standards, reducing long-term grid loss by over 30% compared with traditional products, and significantly cutting project operation and maintenance costs.
The high-voltage winding adopts multi-layer cylindrical or continuous structure to optimize impulse voltage distribution; the low-voltage winding (6300-80000kVA) adopts cylindrical or spiral structure, with high mechanical strength, balanced ampere-turn distribution, and excellent short-circuit resistance. The body is equipped with a reinforced positioning mechanism, and all fasteners are fitted with lock nuts to ensure no loosening during long-term operation, fully meeting the core-lifting-free requirement.
The product surface is treated with oil removal, rust removal and sand blasting, then sprayed with high-performance primer and topcoat, adapting to harsh environments such as metallurgy, petrochemical, humid and polluted areas. The fully sealed leakage-free structure realizes long-term maintenance-free operation, with a service life of over 30 years under normal operating conditions.
Parameter Category | Core Technical Index |
|---|---|
Series Model | SZ11, SZ20 |
Rated Capacity Range | 10000kVA - 63000kVA |
Rated Voltage Grade | 110kV - 115kV |
Phase Structure | Three-phase double-winding |
Cooling Method | Natural air cooling (ONAN), optional forced air cooling (OFAF) |
Voltage Regulation Mode | Off-circuit tap-changer, optional on-load tap-changer |
Connection Group Label | YNd11 |
Tap Range | ±8×1.25%, customizable per project requirements |
Short-circuit Impedance | 10.5% - 14.0%, adjustable based on capacity |
Product Model | Rated Capacity (kVA) | Vector Group | High Voltage (kV) | Tapping Range | Low Voltage (kV) | No-Load Loss (kW) | Load Loss (kW) at 75℃ | No-Load Current (%) | Short-Circuit Impedance (%) |
|---|---|---|---|---|---|---|---|---|---|
SZ20 | 63000 | YNd11 | 115 | ±8×1.25% | 37 | 29.5 | 104.4 | 0.34 | 14.0 |
SZ20 | 315000 | YNd11 | 110 | ±8×1.25% / ±8.5±2×2.5% | 10.5 | 20.9 | 134 | 0.5 | 10.5 / 17.5~18.5 / 6.0 |
SZ11 | 100000 | YNd11 | 115 | ±9×1.78% | 11 | 10.9 | 74.4 | 0.47 | 10.5 |
We support customized adjustment of rated voltage, tap range, and on-load/off-circuit voltage regulation mode to match regional grid access standards. Customizable winding structure, cooling method, and corrosion-resistant coating schemes are available for high-altitude, high-humidity, high-pollution harsh environments. We also provide optional intelligent online monitoring systems, gas relays, pressure release devices, and remote communication modules to realize real-time status monitoring and intelligent fault early warning.
All 110kV class power transformers are manufactured in strict accordance with the latest national standards (GB 1094, GB/T 6451) and international IEC standards (IEC-60076), with 100% full-type testing before delivery to ensure compliance with design requirements. We provide full life cycle technical support, including pre-sales scheme optimization, on-site installation and commissioning guidance, regular maintenance, and 24/7 emergency after-sales response, to ensure long-term safe and stable operation of your power transmission and distribution system.
The core-lifting-free design means the transformer body is equipped with a reinforced positioning mechanism and anti-loosening fasteners, with no displacement during transportation and long-term operation. There is no need to lift the core for inspection after transportation and installation, which greatly shortens the project installation cycle and reduces later maintenance costs.
Our 110kV class oil-immersed power transformer strictly complies with the latest national standards including GB 1094 Power Transformer, GB/T 6451 Technical Parameters and Requirements for Oil-immersed Power Transformers, GB20052-2020 Energy Efficiency Limit Values and Energy Efficiency Grades of Power Transformers, as well as the international IEC-60076 standard, fully meeting the access requirements of domestic and international power grid projects.
