The US-130S transformer drying oven is designed for drying the insulation of oil-filled transformer windings. The unit also allows transformers to be filled with transformer oil under vacuum through a dedicated oil filling pipeline.

The main application areas are transformer manufacturing plants, where the equipment is used for drying during the production of power transformers, as well as transformer repair workshops for maintenance and repair operations. The US-130S transformer vacuum drying oven can also be used for drying various types of electromechanical equipment with a maximum operating temperature of up to 130 °C.

Operating principle of the US-130S transformer vacuum drying oven

To achieve the required temperature inside the drying chamber, the system uses tubular heaters with oil heat-transfer medium, operating together with internal air circulation. High-temperature centrifugal fans are used to ensure air circulation inside the heating chamber.

To accelerate the drying process and reduce the moisture content in the transformer active part, the unit is equipped with a vacuum system. By reducing the pressure inside the drying chamber, the vacuum system increases the evaporation rate of water and shortens the overall drying time.

The US-130S unit is equipped with a condensation system for capturing and removing moisture released during the drying process.

Loading of transformer parts into the vacuum chamber

For loading and unloading transformer parts into and from the drying chamber, the unit is equipped with an internal loading/unloading system with an electric drive.

The movement of the chamber door is performed automatically (when the automatic operating mode is selected on the controller) or manually through the controller (when the manual operating mode is selected).

The tight sealing between the door and the drying chamber is ensured by clamping cylinders, which press the door tightly against the chamber walls through a sealing gasket.

Control system of the US-130S transformer vacuum drying oven

The operating status of the US-130S unit can be monitored using a visual and audible alarm system and through the controller display installed in the control cabinet.

The unit is equipped with a drying process control system based on a programmable logic controller (PLC) with a touch-screen display. The system allows real-time monitoring of both the drying process according to the preset temperature parameters and the vacuum level inside the chamber.