Campi di utilizzo

Transfromer oil purification equipment by GlobeCore

Application

http://www.youtube.com/watch?v=xlauIEEcUFM

CMM systems designed and manufactured by Globecore serve for degasification, dehydration and filtration of transformer, cable, turbine and other oils for removal of gases, free and soluble water and particulate matter. The system is applied for installation, repair and operating of oil-filled high voltage equipment up to 1150 kV (power transformers, high-voltage switches etc.) as well as turbines.

  • Purifying and drying Transformer Oil
  • Vacuum filling of Transformers and Electrical apparatuses
  • Drying and Purifying oil in transformers (on and off-line)
  • Vacuum Drying of Transformers
  • Degassing of transformer oil
  • Filtration of transformer oil

Technical description

Globecore equipment is designed as a multipurpose Transformer Oil Conditioning units for field or factory use. The unit incorporates high capacity multi-stage electric oil heaters, a Large Capacity Vacuum Pump with external connections for Vacuum filling work, 3 stage particulate filtration, and connections for a large variety of service applications.

Measuring devices include vacuum, pressure and temperature meters. The equipment can optionally be supplied with water-in-oil measuring device. Installation of water-in-oil measuring device allows in-line monitoring of water content.

Flow rates are variable from 0 to >10000 liters/hour and heating from 24KW to 210 KW in four stages. Globecore systems are designed for easy operation and maintenance.

The principal functions of the insulating oils are to serve as a dielectric medium and as a coolant. To perform these functions, transformer oil must have the necessary qualities at the time of initial impregnation and filling at the factory and later maintain the same quality in normal operation.

High Vacuum Treatment improves insulation fluids including transformer oils and silicone fluids. Globecore transformer oil purification equipment was developed as a result of 30 years of experience in vacuum treatment of transformer oils.

Benefit

Every company dealing with oil-insulated high voltage equipment (transformers, high-voltage switches, turbines, etc., shares the problem of change or disposal of contaminated oils. Costs of disposal or changing of insulating oils are frequently very high and need a significant investment. Our equipment offers a practical, proven and economical method to purify the oil and use it again for high voltage equipment.

Thermally accelerated Vacuum Dehydration and Degasification of Transformer Oil has gained wide acceptance as the most economical method for the removal of dissolved water and gases.

On-Site Transformer Oil Purification is the most profitable as not only does it purify the oil within the transformer, but it actively regenerates the Transformer by removing impurities which buildup within the transformer.

The outstanding thermo-vacuum purification and degassing of the transformer oil will result in the improvement of the condition of the entire insulating medium of power transformers.

  • Removal of dissolved moisture from transformer oil
  • Reduction of combustible gases and oxygen
  • Improvement of oil dielectric values
  • Improvement of transformer power factor
  • Extention of oil service life
  • Extention of transformer service life and reliability

We at Globecore are committed to provide our customers with high quality products that satisfy technical and economic objectives. We offer our vast experience in manufacturing, servicing and operation of transformer oil purification systems.

Machines by Globecore are equipped with approved spare parts. These spare parts were proved during all production period of oil purification machinery by our factory. Over the years optimal components have been carefully selected for our equipment. Due to this we guarantee performance of our machines and results of oil treatment. We sell our equipment to more than 40 countries of the world and have the corresponding reference list.

Short process description

Hot filtration mode

Gear pump sucks the oil for processing via valve and strainer. Processed oil is then pumped through cartridge filter, three-way valve and is discharged to processed oil vessel via connector.

The above mode is also used for transformer core drying. Transformer oil is circulating through oil purification equipment. After filtering the oil to remove the particles, the oil is heated up to max. temperature of 800C. All residual gases are removed and the moisture evaporates in vacuum degassing chamber. Residual moisture contents can be reduced to less than 3 ppm. Oil purification is a necessary maintenance process for oil-filled transformers and can be employed for removal of moisture from transformer core. Heating of the transformer oil moves moisture from paper to the oil. The most common mistake made by operators of transformer oil purification equipment is to stop the drying process after reaching oil moisture content of less than 5 ppm. After some time, when normal transformer operation conditions exist, the moisture content of the oil increases. It is essential to dry the transformer oil continuously throughout a long period.

Transformer evacuation.

Another required process is to intermediately evacuate the transformer after pumping out the transformer oil out of transformer tank. Vacuum effect on the insulation surface improves moisture removal. The process is to be repeated several times.

Hot filtration and thermo-vacuum drying.

Gear pump sucks the oil for processing via strainer and cartridge filter and directs it to the heat exchanger, where the oil is heated by the circulating heat conductor. The oil is fed to the vacuum drier’s sprayer after being heated to 60oC. Vacuum pump maintains vacuum in the vacuum chamber. Vacuum can be regulated by valve and monitored on the vacuum meter. Filtered hot air comes into the chamber and removes gases and vapor from the oil’s surface, drying the oil. The air is then discharged into the atmosphere via oil separator by the vacuum pump. Gear pump directs the oil into the processed oil vessel. A programmable thermal regulator switch monitors the plant’s function continuously and maintains the pre-set temperature.