80kVA Three-Phase Oil-Filled Power Transformer
Delivery Year: 2022
Country: Saudi Arabia
Application: Power supply for hospital operating rooms, ICU, and life-support equipment.
Advantages:
The oil-filled transformer ensured device stable in high-temperature environments through precise voltage conversion (10kV → 400V). Its leak-proof design prevented contamination, minimizing downtime risks.
Have questions? GNEE sales representatives are available for live chat now
Send E-mail: sales@gneeelectric.com
Tel: +8615824687445
Henan GNEE Electric Co., Ltd. is one of the most reliable manufacturers and suppliers of 80kva three-phase oil-filled power transformer in China. With abundant experience, we warmly welcome you to wholesale high quality 80kva three-phase oil-filled power transformer at low price from our factory. Contact us for more cheap products.
Basic Structure Of Oil-Filled Power Transformer
Core: Made of high-quality silicon steel laminations to minimize eddy current losses, ensuring efficient energy transfer.
Windings: High-voltage and low-voltage windings are wound on either side of the core, enabling voltage conversion via electromagnetic induction.
Tank and Insulating Oil: The oil-filled design is central to its performance-the insulating oil fills the sealed tank, isolating windings and the core while dissipating heat via natural convection, reducing temperature rise.
Cooling System: Includes heat radiators and oil circulation components to optimize cooling efficiency for the Oil immersed transformer.
Protection Devices: Pressure relief valves, oil-level gauges, and temperature sensors monitor operational safety.
The design integrates three-phase balance and oil-cooling characteristics to meet the demands of long-term industrial applications.
Products parameter
Rated capacity(kVA) |
High voltage(kV) | High voltage tapping range (%) |
Low voltage(kV) | Vector Group symbol | No-load Loss (kW) |
On-load Loss(kW) | No-load Loss (kW) |
On-load Loss (kW) |
Short-circuit resistance (%) |
No-load Current (%) |
| Model 11 | Model 13 | |||||||||
| 30 | 6 6.3 10 10.5 11 |
±2 × 2.5 or ±5 |
0.4 | Dyn11 or Yyn0 |
0.1 | 0.63/0.6 | 0.08 | 0.63/0.6 | 4.0 | 1.5 |
| 50 | 0.13 | 0.91/0.87 | 0.1 | 0.91/0.87 | 1.3 | |||||
| 63 | 0.15 | 1.09/1.04 | 0.11 | 1.09/1.04 | 1.2 | |||||
| 80 | 0.18 | 1.31/1.25 | 0.13 | 1.31/1.25 | 1.2 | |||||
| 100 | 0.2 | 1.58/1.5 | 0.15 | 1.58/1.5 | 1.1 | |||||
| 125 | 0.24 | 1.89/1.8 | 0.17 | 1.89/1.8 | 1.1 | |||||
| 160 | 0.28 | 2.31/2.2 | 0.2 | 2.31/2.2 | 1.0 | |||||
| 200 | 0.34 | 2.73/2.6 | 0.24 | 2.73/2.6 | 1.0 | |||||
| 250 | 0.4 | 3.2/3.05 | 0.29 | 3.2/3.05 | 0.9 | |||||
| 315 | 0.48 | 3.83/3.65 | 0.34 | 3.83/3.65 | 0.9 | |||||
| 400 | 0.57 | 4.52/4.3 | 0.41 | 4.52/4.3 | 0.8 | |||||
| 500 | 0.68 | 5.41/5.15 | 0.48 | 5.41/5.15 | 0.8 | |||||
| 630 | 0.81 | 6.2 | 0.57 | 6.2 | 4.5 | 0.6 | ||||
| 800 | 0.98 | 7.5 | 0.7 | 7.5 | 0.6 | |||||
| 1000 | 1.15 | 10.3 | 0.83 | 10.3 | 0.6 | |||||
| 1250 | 1.36 | 12 | 0.97 | 12 | 0.5 | |||||
| 1600 | 1.64 | 14.5 | 1.17 | 14.5 | 0.5 | |||||
| 2000 | 1.94 | 18.3 | 1.36 | 18.3 | 5 | 0.4 | ||||
| 2500 | 2.29 | 21.2 | 1.6 | 21.2 | 0.4 | |||||
Working Principle of Oil immersed transformer
The three-phase Oil immersed transformer operates based on electromagnetic induction:
Voltage Conversion: Alternating current on the high-voltage side (e.g., 10kV) creates a fluctuating magnetic field through the core, inducing an electromotive force in the low-voltage windings (e.g., 400V).
Oil-Filled Cooling: Insulating oil surrounds the windings and core, absorbing heat and dissipating it via radiators through natural or forced convection, ensuring stable operation under high loads.
Three-Phase Balance: Three independent windings handle each phase current, reducing harmonic interference and providing symmetric power output.
Insulation and Protection: Insulating oil isolates moisture and air, extending the lifespan of the oil-filled transformer.
This process optimizes thermal management and insulation performance, ensuring high-reliability output.
Common Faults and Solutions of Oil immersed transformer
1. Overheating
Cause: Insufficient oil levels or radiator blockages impair cooling.
Solution: Check and refill insulating oil, clean radiators, and ensure cooling system efficiency.
2. Partial Discharge Anomalies
Cause: Aging winding insulation or degraded oil.
Solution: Test the dielectric strength of insulating oil; replace oil if necessary. Repair or replace damaged windings.
3. Oil Leakage
Cause: Aging seals or tank weld cracks.
Solution: Locate leaks, replace seals, repair welds, and verify oil pressure compliance.
4. Abnormal Output Voltage
Cause: Faulty tap switch or unbalanced load.
Solution: Adjust the tap switch position and balance the three-phase load to optimize performance.
Why choose us?
GNEE strictly follows the comprehensive acceptance testing process to ensure that the performance of each device meets the standards. Our products and services have been successfully applied in more than 50 countries and regions around the world. As a trusted global industrial partner, we are always committed to helping customers achieve their sustainable development vision through high-quality products and full-process services.
Support
• Pre-sales: Free technical consulting, drawing review, and installation training.
• After-sales:
o Global warranty for 2 years; 5-year warranty on core components.
o 7×24-hour remote support, fault response within <24 hours.
o Operation manual provided.
Our factory
Packing and Delivery
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