In the world of high-voltage equipment, the life of a transformer depends on the quality of its “blood”—the insulating oil. At Baitong Electric, we don’t just pour oil into a tank; we use a precision-controlled vacuum process to ensure maximum insulation and cooling efficiency.
Many clients ask us: “How do you ensure the oil reaches every corner of the transformer without trapped air?” Today, we are taking you inside our workshop to see how our experts handle this critical stage.
The Importance of Vacuum Filling
Traditional gravity filling can leave tiny air bubbles trapped within the windings. These bubbles can cause partial discharge, leading to insulation failure over time. Our vacuum process eliminates this risk by removing air and moisture before the oil even enters the tank.
Step-by-Step: Our Professional Filling Process
Step 1: Pre-Filling Vacuum Pumping
Before injection, we connect the transformer tank to a high-capacity vacuum pump. This extracts residual air and moisture from the core and insulation materials, creating a perfect environment for the oil.
Step 2: Dielectric Oil Testing
We only use high-grade mineral oil that has passed rigorous dielectric strength and moisture content tests. Purity is non-negotiable for long-term reliability.
Step 3: Controlled Bottom-Inlet Injection
As demonstrated in our workshop video, we perform the oil filling through the top inlet port. For the specific design of our high-efficiency transformers, this method allows for:
Controlled Flow: We use a specialized nozzle (as seen in the video) to minimize splashing and prevent the formation of static charges or air bubbles during the process.
Direct Observation: Our technicians can monitor the oil flow and level more closely as it enters the main tank.
Efficient Air Displacement: By combining top-filling with our vacuum system, we ensure that as the oil settles, any remaining air is forced out through the vacuum valves, leaving the windings perfectly impregnated.
Step 4: Oil Level Calibration
We monitor the oil level using precision gauges, ensuring it reaches the exact scale required for the specific ambient temperature (typically the 25°C mark on the conservator).
Step 5: Final Sealing and Pressure Test
Once filled, the unit is sealed and subjected to a pressure test to ensure there are zero leaks.
Why Choose Baitong Electric’s Transformers?
- Advanced Equipment: We use automated vacuum oil-filling machines to maintain consistency across every batch.
- Expert Craftsmanship: Our technicians have decades of experience in handling complex S11 and S13 oil-immersed or dry-type transformer models.
- Quality Assured: Every transformer undergoes a full routine test before it leaves our Yueqing supply chain.
