DC-18D Transformer Oil Degassing Machine

The DC-18D machine is designed for multiple applications, which involve insulating and cooling oils used in high-voltage electrical equipment, such as transformers, on-load tap changers (OLTC), transformer bushings, and high-voltage switches. The machine performs essential functions, which include:

• Heating, pumping, and purification of electrical insulating oils
  This process removes solid particles, dissolved gases, and moisture from oil.
• Evacuation of transformer tanks
  The unit removes air and gases from transformer tanks during servicing or repair when gases may have entered the system.

Machine Design

The DC-18D machine is housed in a robust containerized enclosure that contains all major operational components listed below:

• Vacuum chamber for reducing internal pressure to facilitate degassing.
• Vacuum generation components, including both booster and backing pumps.
• High-efficiency oil pumps.
• Integrated oil heating system.
• Dual-stage filtration system for removing coarse and fine particulate contaminants.
• Centralized control panel featuring status indicators and operational controls.

Operating Modes

The DC-18D offers several operating modes to meet a variety of servicing needs:

1. Oil Transfer Mode
   In this basic mode, the system functions as a transfer pump. Oil passes through the filtration system while being pumped from one vessel to another.
2. Heating and Filtration Mode
   In this mode, the oil is first heated and then passed through the filtration stages to remove particulate contaminants. The processed oil exits the unit in a clean and heated condition, ready for use.
3. Degassing and Dehydration Mode
   For thorough processing, oil is first heated to 122–131 °F (50–55 °C) and filtered. The oil then enters the vacuum chamber where reduced pressure and elevated temperature work together to efficiently remove dissolved gases and moisture. The chamber contains specialized media designed to maximize the oil surface area, thereby enhancing the extraction of water and gases under vacuum.
4. Vacuum Evacuation Mode
   In this mode, the DC-18D machine is connected via hose to external equipment (such as transformers). The vacuum system then evacuates air from the connected equipment to achieve the required vacuum level.

Note: * Initial oil parameters:

• Volumetric gas content – below 10.5 %;
• mass moisture content – below 50 ppm (0.05 %);
• temperature – above 32 °F/ 0 °C.

**All the equipment sold in the USA is designed to operate on a 60 Hz AC power supply.

Key Benefits of the DC-18D

• Versatility: suitable for multiple applications, including, but not limited to oil heating, filtration, degassing, dehydration, and vacuum evacuation.
• No Adsorbents Required: transformer oil dehydration is achieved without the need for adsorbents.
• Environmentally Friendly: no air pollution, no waste streams to store or dispose of.
• Ease of Use: easy operation and low maintenance requirements.
• High Oil Quality: excellent oil purification results can be achieved even after one processing cycle.
• Low Power Consumption: energy-efficient design with minimum power requirements.
• Noiseless Operation: low noise levels for improved working conditions.