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| Item | Specification |
| Product Model | Example: S11-M-500/10, S13-R-1000/20, S15-H-2500/35 (S=Three-Phase; 11/13/15=Efficiency Class; M/R/H=Structural Type; Capacity kVA/HV kV) |
| Rated Capacity | 30kVA~5000kVA (ONAN: 100% rated capacity; ODAF: 130%; ODWF: 160%) |
| Phase/Frequency | Three-Phase (standard); 50Hz/60Hz (±1% tolerance, customizable for 400Hz special use) |
| Connection Group | Dyn11 (default for distribution), Yd11 (for power transformer); Yyn0 (optional) |
| Cooling Type | ONAN (Oil Natural Air Natural) / ODAF (Oil Directed Air Forced) / ODWF (Oil Directed Water Forced) |
| Parameter | Details |
| Ambient Temperature | -25℃~40℃ (standard); -40℃~45℃ (low-temperature/high-temperature models with modified oil). |
| Altitude | ≤1000m (derate 5% at 1500m, 10% at 3000m, 15% at 4000m). |
| Humidity | ≤90% @25℃ (no condensation); ≤50% @40℃. |
| Seismic Resistance | GB 50260-2013 / IEC 60076-11, 7-degree intensity (0.15g acceleration); 8-degree optional. |
| Protection Class | IP23 (outdoor, dust/rainproof) / IP20 (indoor). |
| Efficiency Class | Parameter | 500kVA/10kV Example | Test Condition |
|---|---|---|---|
| S11 (IEC IE1) | No-Load Loss (Po) | ≤810W | Rated voltage/frequency |
| Load Loss (Pk) | ≤5200W | Rated current, 75℃ | |
| S13 (IEC IE2) | No-Load Loss (Po) | ≤650W (20% lower than S11) | Rated voltage/frequency |
| Load Loss (Pk) | ≤4800W | Rated current, 75℃ | |
| S15 (IEC IE3) | No-Load Loss (Po) | ≤520W (36% lower than S11) | Rated voltage/frequency |
| Load Loss (Pk) | ≤4500W | Rated current, 75℃ | |
| All Classes | Short-Circuit Impedance (Uk%) | 4%~6% (10kV); 6%~8% (35kV) | 75℃, ±10% tolerance |
Leveraging high thermal conductivity insulating oil to transfer heat to the tank and radiators, ensuring stable operation under high loads and preventing damage.
Effectively isolates air, moisture, and dust, reducing leakage risks. Highly reliable in humid, dusty, or harsh industrial environments.
The oil-immersed structure allows it to withstand short-term overloads from sudden surges without performance degradation or shutdowns.
Sealed design protects internal parts from corrosion and wear, typically exceeding 20 years of operation life with stable performance.
Requires only periodic checks of oil level and quality, simplifying operations and cutting long-term maintenance costs significantly.
Widely used in high-voltage grids and large infrastructure, meeting strict resistance standards for safe, high-power transmission.
Essential for voltage conversion and power transmission across regional power grids and substations.
Reliable power supply for industries with continuous, high-intensity needs.
Ensuring stable, long-term power supply for infrastructure.
