Oil-Immersed Three-Phase Two-Winding Transformers
An oil-immersed transformer refers to a type of transformer where its critical components like the iron core and windings are submerged in transformer oil. This oil serves as both an insulator and a coolant, effectively providing insulation and heat dissipation.
Product Details：Oil-immersed three-phase two-winding transformers
Featuring robust load adaptability and straightforward maintenance, the oil-immersed transformer seamlessly adapts to varying load scenarios by adjusting its input and output currents. Routine inspections and oil replacements suffice to sustain its optimal performance.
PARAMETER：
Model | OSFPZ-300000/400 | OSFPSZ-315000/400 | SFZ-4380000/420 |
Capacitance ratio (MVA) | 300/300/100 | 315/315/105 | 438/438 |
Ratio-voltage (kV) | 400±8×1.25%/115/10.5 | 400±8×1.25%/220/33 | 420(-10，+6)×1.25%/20 |
voltage regulation mode | Variable magnetic flux | Constant magnetic flux | Constant magnetic flux |
Open circuit losses (kW) | 78.01 | 55.96 | 149.56 |
Load losses (kW) | 581.95 | 430.88 | 779.93 |
Impedance voltage (%) | 14.3 (High-Medium) | 12.5 (high-medium) / 45 (high-low) / 30 (medium-low) | 14.31 |
Oil oil temperature rise (K) | 37.1 | 34.2 | 30.7 |
Maximum Winding temperature rise (K) | 56 | 47.3 | 47.5 |
No-load noise (dB (A)) | 64.7 | 60 | 67 |
Measured local level (pC) | 80 | 100 | 90 |
1. Characteristic
（1）The high voltage and low voltage winding of oil-immersed transformer is generally made of cylindrical structure, so as to ensure the balanced distribution of current turns.
（2）Vacuum dry the coil and iron core, and filter the transformer oil and inject it through the vacuum process. The core and the winding respectively adopted the fastening measures, the height of the device, the low pressure lead and other tightening parts are equipped with self-locking anti-loosening nut, using the non-lifting structure, can withstand the shock of transport.
（3）The spiral coil adopts longitudinal oil channel, with good heat dissipation, low magnetic leakage and high mechanical strength; the reliable support structure can greatly improve the short-circuit tolerance.
（4）The insulation material has a high heat resistance, can withstand the overvoltage and overcurrent in operation.
2. Working Principle
Using the principle of electromagnetic induction of electric potential induced by cutting the magnetic lines of force of the wire, the mechanical energy of the prime mover is changed into electric energy output. Three-phase generator can produce three sets of alternating current with equal amplitude, equal frequency and phase difference of 120° from each other, which is a common power source in industry.
3. Application Case
(1) Power conversion and transmission: Three-phase, three-winding transformers play a crucial role in power systems for power conversion, transmission and distribution. They are capable of connecting transmission systems of different voltage levels, improving transmission efficiency and ensuring stable operation of the power grid.
(2) Substations and Distribution Stations: In substations and distribution stations, three-phase, three-winding transformers are used to step up or step down the power supply and maintain the stability of power transmission. They support the reliability and stability of the power grid and provide a stable power supply to power consumers.
CASES
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SERVICE
Production Concept
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FAQ：
Q: Are your prices competitive?
A: We are committed to offering competitive prices while ensuring the quality of our products and the excellence of our services. We will provide customers with reasonable price plans based on factors such as market conditions and order volume.
Q: What are the payment methods?
A: We accept wire transfer. Specific payment methods can be determined according to customers' needs and preferences.
Q: What is the production lead time for the products?
A: The production lead time is usually 3 weeks, which may be adjusted according to the order quantity and the actual situation of the production line. We will try our best to shorten the production cycle to meet customers' needs.
