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China S22-M Oil-Immersed Transformer 35kV 2500kVA from Reliable Suppliers & Factory for Power Transmission Solutions
Product Application
Application of High Magnetic Flux Oriented Silicon Steel Sheets
The core magnetic path of the transformer is made of high magnetic permeability oriented silicon steel sheets. Compared with traditional silicon steel sheets, its magnetic permeability is increased by more than 15%, and the iron loss value is reduced by 20% to 30%. This material is processed through a special grain orientation optimization process, which makes the magnetic domains more orderly, effectively reducing the hysteresis loss and eddy current loss during the alternating magnetic field process.
Selection of Environmental-Friendly Insulating Materials
The transformer is equipped with environmentally friendly insulating oil and insulating paper. The insulating oil is made of natural esters or synthetic esters, which are environmentally friendly. Compared to traditional mineral insulating oil, it is biodegradable and will not cause pollution to the soil or water sources if it leaks, thus conforming to the concept of green power development.
High-Strength Metal Structural Components
The structural components such as transformer oil tanks and clamps are made of high-strength cold-rolled steel plates. They are formed through CNC stamping and welding. The yield strength of the material reaches over 345 MPa. Compared with ordinary steel plates, the anti-deformation ability has been enhanced by 40%, effectively resisting external force impacts during transportation and installation.
Full Inclined Joint Stacking Process of the Core
The transformer core adopts the full inclined joint stacking process. Compared with the traditional direct joint process, the magnetic resistance at the joint is reduced by more than 60%, effectively reducing the leakage magnetic loss and noise at the joint. During the stacking process, a special positioning tool is used to ensure the flatness and verticality of the core laminations, and the gap between the laminations is controlled within 0.05mm, ensuring uniform magnetic permeability of the core.
Product Specifications
| Rated Capacity (KVA) | Connection Group Label | Voltage Combination (KV) | No-Load Current (%) | Load Loss (T) | No-Load Loss (T) | Short Circuit Impedance (%) | |||
| (H.V.) | Tapping Range | (L.V.) | DY | Yy | |||||
| 30 | Yyn0 Dyn11 |
10 6.3 6 |
±5% ±2×2.5% |
0.4 | 1.5 | 505 | 480 | 80 | 4.0 |
| 50 | 1.3 | 730 | 695 | 100 | |||||
| 63 | 1.2 | 870 | 830 | 110 | |||||
| 80 | 1.2 | 1050 | 1000 | 130 | |||||
| 100 | 1.1 | 1265 | 1200 | 150 | |||||
| 125 | 1.1 | 1510 | 1440 | 170 | |||||
| 160 | 1.0 | 1850 | 1760 | 200 | |||||
| 200 | 1.0 | 2185 | 2080 | 240 | |||||
| 250 | 0.9 | 2560 | 2440 | 290 | |||||
| 315 | 0.9 | 3065 | 2920 | 340 | |||||
| 400 | 0.8 | 3615 | 3440 | 410 | |||||
| 500 | 0.8 | 4330 | 4120 | 480 | |||||
| 630 | 0.6 | 4960 | 4960 | 570 | 4.5 | ||||
| 800 | 0.6 | 6000 | 6000 | 700 | |||||
| 1000 | 0.6 | 8240 | 8240 | 830 | |||||
| 1250 | 0.5 | 9600 | 9600 | 970 | |||||
| 1600 | 0.5 | 11600 | 11600 | 1170 | |||||
Detail Pictures
Frequently Asked Questions
Q
What are the advantages of using high magnetic flux oriented silicon steel sheets in the S22-M transformer?
High magnetic flux oriented silicon steel sheets increase magnetic permeability by more than 15% and reduce iron loss by 20%–30% compared to traditional silicon steel sheets. The grain orientation optimization process makes magnetic domains more orderly, significantly reducing both hysteresis loss and eddy current loss during alternating magnetic field operation.
Q
Why does the S22-M transformer use environmentally friendly insulating oil instead of mineral oil?
The S22-M uses natural ester or synthetic ester insulating oil, which is fully biodegradable. Unlike traditional mineral insulating oil, it will not pollute soil or water sources in the event of a leak, aligning with modern green power development standards and environmental regulations.
Q
What is the yield strength of the structural components used in the S22-M transformer?
The oil tanks, clamps, and other structural components are manufactured from high-strength cold-rolled steel plates with a yield strength exceeding 345 MPa. This provides 40% greater anti-deformation capability compared to ordinary steel plates, ensuring durability during transportation and installation.
Q
How does the full inclined joint stacking process improve transformer performance?
The full inclined joint stacking process reduces magnetic resistance at the core joint by more than 60% compared to the traditional direct joint process. This minimizes leakage magnetic loss and operational noise. The lamination gap is also precisely controlled within 0.05mm to ensure uniform magnetic permeability throughout the core.
Q
What capacity range and voltage combinations does the S22-M transformer support?
The S22-M transformer is available in rated capacities ranging from 30 KVA to 1600 KVA. It supports high-voltage combinations of 10 kV, 6.3 kV, and 6 kV, with a low-voltage output of 0.4 kV. The tapping range is ±5% or ±2×2.5%, with connection group labels of Yyn0 and Dyn11.
Q
What is the short circuit impedance of the S22-M transformer and how does it vary by capacity?
The short circuit impedance for the S22-M transformer is 4.0% for capacities ranging from 30 KVA to 500 KVA, and increases to 4.5% for larger capacities from 630 KVA to 1600 KVA. This parameter is important for determining fault current levels and system protection coordination.