The efficient and reliable use of transformers, circuit breakers and various types of electrical equipment depends upon their design and operating conditions which will affect the life and reliability of the equipment. Dielectric fluids are used in various pieces of electrical equipment. This fluid is used to insulate, cool as well maintain a dielectric in high voltage equipment. To satisfy these criteria, dielectric fluids must be maintained in top condition to work as designed. Most dielectric fluids are affected by oxidation and as result the natural decaying process takes place in the fluid. This decay process develops water and even sludge in resulting in a shorter life span and or ultimately failure of the device. Impurities in the oil are usually particles, water, sludge, acidity, gas etc. Globecore company has developed insulating fluid regeneration plant using Fullers earth in order to eliminate above problems.
PRINCIPLE OF OPERATION
Working in conjunction with a Globecore oil purifier (two separate plants) and working on the principle of reactivated Fuller’s Earth, Globecore oil regeneration plants are highly recommended to maintain, dry, fill and treat your Die electric or transformer oil as required.
By removing contaminants from insulating oils, they restore the oils dielectric properties, and at the same time extend the useful life of your electrical equipment including the oil.
TREATMENT OF TRANSFORMERS
Globecore oil regeneration plants are designed to work on energised and de energised transformers. Connection to the transformer is to be done by experienced plant operators or by the client who has been trained and certified to do this operation. Before On line connections are done full consideration must be given to the onsite safety in regards to clearances between the connection valves and energised parts of the transformer. If in doubt in any way in regards to the safety with on line connections, the transformer needs to be de energised before final connections are made. Thereafter the transformer can once again be energised. This method and procedure will generate savings to the customer as the transformer remains energised at al times.
GLOBECORE OIL REGENERATION PLANT HAS BEEN DESIGNED TO TREAT TRANSFORMER OIL AND IMPROVE THE FOLLOWING CONDITIONS:
- Dielectric from 20 kV to as high as 70 kV – coupled to purifier
- Moisture from 50 ppm down to below than 5 ppm – coupled to purifier.
- Gas content from 10% by volume down to less than 0.1% by volume – coupled to purifier
- Oil acidity from 0.4 mg KoH/gm oil down to 0.03 mg KoH/gm oil
- Tan Delta correction from 1 down to 0.5%
- Interfacial tension up to 45 dyne /cm2
- Removal of sludge
- Correction of oil colour
By recirculating oil between 65-700C within the transformer, the internal areas of the transformer are cleaned and equilibrium once again is restored in the transformer windings. Further the oil once again becomes a protector of the insulation and as a result the transformer will last longer.
Instead of the standard regeneration system, the DUAL oil regeneration plant is composed of two independent banks of columns. While the first bank of columns is processing oil , the second bank is in the reactivation cycle (cleaning the fuller’s earth). The two banks are composed of 12 columns each making a total of 24 columns. If this option is required the plant will be supplied in a 40’ container
Continuous moisture content measuring
This instrument is designed to carry out on-line moisture content measurement, continuously during the oil treatment.. The measured range is from 0 to 100 ppm.
INSTALLED INSIDE CONTAINER
The plant can be installed in metallic feet container (according to the oil regeneration plant type) which makes transportation and storage easy and convenient. This standard container is made of iron steel and wood for the floor. Doors and special openings are installed on both sides of the container to have access to the main parts of the plant. The container is also equipped with cooling fans to exhaust warm air from the container. Lighting is provided throughout the container
This option is used when a client requires the plant to be supplied in a trailer. The plant will be installed in either a single axle or double axle semi trailer depending on size of regeneration plant. Alternatively this option enables to transport the oil regeneration system installed in a container, on the road. The container can stay on the trailer or be unloaded on site as required. The container is also equipped with cooling fans to exhaust warm air from the container.Lighting is provided throughout the trailer.