Product overview
With over 10 years of hands-on experience in electrical equipment manufacturing, QIALLAI’ve focused on crafting high-quality 225 kva three phase oil immersed transformers for global markets. Our products fully comply with IEEE,and IEC international standards—critical for seamless integration into diverse power grids worldwide. Whether powering factory production lines, commercial complexes, or renewable energy projects, this 225kva oil-immersed transformer is engineered to stand up to rigorous operational demands, balancing exceptional efficiency with long-term durability. For industrial applications, its Dyn11 standard (connection group) offers superior resistance to unbalanced loads, a common challenge in workshops with mixed motor and lighting loads.
Main technical Parameter
| Rated capacity | 225 KVA |
| Primary voltage | 33KV/35KV/13.2KV/11KV/10KV/6.3KV/6KV(customizable) |
| Tap changer | ±2*2.5/±5 |
| Secondary voltage | 400V/415V/433V/380V(customizable) |
| Vector group | Dyn11/Yzn11/Yyn0 |
| Number of phase | Three phase |
| frequency | 50hz |
| Temperature rise | 65K |
| Short circuit impedance | 4.0% |
| No load loss | Different series(S10,S11,S13,S14),got different loss data |
| Load loss 75ºC | Different series(S10,S11,S13,S14),got different loss data |
| Cooling type | ONAN |
| Oil type | 25#/45# |
| standards | IEC 60076-1 |
Core Advantages: Why Choose QIALLAI 225 kva Oil Immersed Transformer?
Energy efficiency isn’t just a specification—it’s direct cost savings for your business. We use 30Q130 high-grade cold-rolled silicon steel for the core, paired with staggered lamination (97%+ lamination coefficient) to reduce hysteresis and eddy current losses (iron loss) by 20% vs. standard models. High-purity copper windings (vacuum-impregnated for insulation density) further lower load loss, making our S11/S13 series eligible for green energy rebates in Europe and North America. For a 225kva unit running 24/7, this translates to $2,000-$3,000 in annual electricity savings (based on $0.15/kWh).
Normal Operating Conditions
Altitude:Not exceeding 1000m;
Ambient temperature:
Maximum air temperature: +40°C;
Average temperature of the hottest month: +30°C;
Maximum annual average temperature: +20°C;
Minimum outdoor air temperature: -25°C;
The waveform of the power supply voltage is approximately sinusoidal.
For three-phase transformers, the three-phase power supply voltages should be roughly symmetrical.
Installation environment:No obvious pollution in the installation environment;
Ground acceleration ag caused by earthquakes: less than 3m/s²
in the horizontal direction,and less than 1.5m/s² in the vertical direction.
