Dielectric Oil Treatment Plants

Dielectric oil is used inside a power transformer due to its suitability as isolating media. Humidity and gas content in the oil needs to be minimized in order to provide the highest dielectric strength and thus optimizing its isolation capacity.

Telstar oil treatment plants circulate heated oil through a vacuum column, removing water and other impurities dissolved in the oil. This treatment is performed on new oil introduced at the final stages of the transformer manufacturing, and it is also a maintenance operation in the field that has to be carried out periodically.

Telstar provides a standard product range including accessories to enable on-the-field maintenance operations. As an option Telstar plants can be easily adapted to specific requirements for a factory production line.

Telstar oil treatment plants allow the oil to heat, pumping it through a particle filter and passing it through a vacuum column, where it is degassed and dehydrated.

The main components of Telstar plants are:

  • Oil heater design to increment oil temperature in a controlled and uniform way in order to avoid oil decomposition.
  • Particle filters.
  • Vacuum column, filled with stainless steel pall rings, ensuring optimum oil flow for degassing and drying.
  • Oil foam monitoring and control system.
  • Oil pumps with a frequency converter allowing flow adjustment.
  • Vacuum pumping system maintaining vacuum conditions in the column.
  • Vacuum gauges.
  • Double inlet and outlet valve to allow for different oil treatment configurations.

Options and Accessories

  • Double oil circulation pump.
  • Oil hoses.
  • Additional filter.
  • Flow meter.
  • Volatile oil fraction condenser.
  • Roots vacuum pump.
  • Double effect degassing column.
  • Auxiliary vacuum pump.
  • Henrymeter to measure residual gas content.
  • Mobile platform for road transport.
  • Protecting canvas covers.

Control System

Telstar oil treatment plants are controlled by state of the art PLC. The PLC allows automatic operation including visual and audio signs, alarms, emergency buttons and automatic data storage. It also allows manual control of the system and modification of process parameters through the touch screen user interface.

Key Features

  • Portable
  • Configurable
  • Compact
  • Autonomous

Telstar Value Services

We work alongside our customers in close partnership, supporting them throughout the full life cycle of their plant and equipment to ensure lasting business success.

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