Tag Archives: GlobeCore

GlobeCore CMM-4D Unit Successfully Commissioned in Uganda

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On December 3, 2015 GlobeCore employees successfully completed the commissioning of a new GlobeCore CMM-4D oil degassing unit in Uganda.

The main advantage of the CMM-4D is its versatility.  With the CMM-4D unit you can perform the following operations:

  • purification of insulating oil by removing mechanical impurities (filtration fineness is 5 microns), water and gases;
  • heating of electrical apparatuses with transformer oil;
  • vacuum drying of transformers; and
  • vacuumizing of equipment.

The principle of operation of the GlobeCore CMM-4D unit is based on the thermal vacuum purification of transformer oil in electric substation.  In the vacuum column, the oil is finely atomized.  Special filter-activators provide for a larger area of its processing.

The unit can operate in the following modes:

  • oil transfer;
  • warm-up of transformer at electric substation;
  • heated filtration and thermal vacuum purification of the oil; and
  • vacuumizing of equipment.

GlobeCore’s CMM-4D unit is easy to operate and maintain and it provides stable processing parameters of transformer oil.  With the installed sensors and automation system, you are able to control the oil heating temperature, monitor the presence of oil flow through the heater, protect the heater from overheating, and adjust the heating temperature in accordance with the set mode.

You can order the multifunctional CMM-4D unit for purification and degassing of transformer oil right now by contacting one of the persons on the contact list. Remember that we are always ready to answer your questions.

“Mojave Heat” Hot Air Drying Unit Successfully Commissioned in Oman

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On 17 December 2016, representatives from GlobeCore traveled to Oman to commission a new Mojave Heat Hot Air Drying unit.  The unit was successfully commissioned and is now in full operation in Oman.  

The Mojave Heat is designed for drying the air inside an electric power transformer with temperatures up to +90ºC/194ºF, as well as cleaning the air by removing mechanical impurities.  The Mojave Heat can be used during installation and repair of power transformers.  In particular, the equipment is used for:

  • depressurization of power transformers;
  • draining the oil from power transformers; and
  • drying of small transformers up to 110 kV with dry hot air.

Furthermore, with this unit you can restore sorbents used in other equipment by processing them at temperatures between 400ºC and 430ºC/752ºF and 806ºF.  Mojave Heat units can also be used in the agriculture industry for drying grains, hay and other farm products.

The automated model is operated via a touch-panel, by which you can set the required operating modes of the unit.  The flow rate of the air is adjusted by the help of frequency converters (one for each blower). The predetermined heating temperature is maintained through the PID-control.

The use of automated controls in Mojave Heat units reduces energy consumption and labor costs as well as ensuring the integrity and airtightness of electrical equipment during installation and repair work.

The equipment specifications are listed below. If you have any questions related to selection of the right Mojave Heat unit for your specific needs, you can always get expert advice from an engineer or manager at GlobeCore.

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El Paso, Texas: CMM-12R Regeneration Unit Gets Ready to Regenerate Transformer Oil!

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On 15 November 2015, in the city of El Paso, Texas, USA, GlobeCore employees completed the commissioning and start-up of a new GlobeCore CMM-12R oil regeneration unit.

This CMM-12R unit is designed for the complete regeneration of dielectric transformer insulating oil by removing moisture, contaminants and dangerous acids.

The GlobeCore CMM-12R unit processes insulating oil by directly hooking up to the power transformer and has a flow rate capacity up to 4 m3/1059 gals. per hour.  The CMM-12R can process oil on an energized transformer, or with the transformer offline.

The CMM-R12 is able to perform oil regeneration operations on site.  The unit will remove water, moisture, and contamination from the windings and solid insulation utilizing a Fuller’s Earth renewable sorbent.  The sorbent itself can be reactivated many times eliminating the need to stop the regeneration process to unload and reload sorbent.  Use of the GlobeCore Process regeneration technology can extend the service life of the electric power transformer up to 20  years and beyond.

Parameters of Transformer Oil Processed with the GlobeCore SMM-12R Type Unit  

No.

Parameter description

Value

1

 Filtration rating, micron, not more

3

2

 Acid number, mg KOH/g in accordance with IEC 296; ASTM D-664

0.01

3

 Corrosive sulfur as per ISO 5662; ASTM D-1275

absent

4

 Surface tension, N/m, at 25ºС in accordance with ISO 6295; ASTM D-2285

45

5

 Dielectric loss tangent at 90ºС in accordance with IEC 247; ASTM D-924

0.001

6

 Oxidation stability. Acid number, mg KOH/g in accordance with IEC 1125А; IEC 1125B; IP-307

0.2

Please view our small photo report on the results of the start-up of the CMM-12R unit in El Paso, Texas, USA.

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Product Presentation in Bulgaria

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Between the 18th and 24th of October 2015, GlobeCore representatives made product presentations in several Bulgarian cities including Sofia, Plovdiv, Ruse, Blagoyevgrad, and others.

Some of the products presented were:

  •   GlobeCore Bitumen emulsion production units;
  •   GlobeCore Bitumen polymer production units; and
  •   GlobeCore Bitumen Laboratory equipment.

The presentations were attended by road construction industry management professionals and engineers.  GlobeCore representatives provided each attendee wih the most recent equipment catalogs containing the latest product offerings and specifications.

At the end of each presentation, everyone was given the opportunity to speak with GlobeCore’s “Design Engineer” and discuss technical issues and ask questions about GlobeCore equipment and service.

It should be noted that a modified bitumen plant, fully equipped by GlobeCore, has been in operation in Bulgaria since 2009.  Learning of the plant’s operation sparked an interest in GlobeCore’s products by Bulgarian road construction companies in attendance at the presentations.

GlobeCore expresses gratitude to all participants for their interest and hospitality.Between the 18th and 24th of October 2015, GlobeCore representatives made product presentations in several Bulgarian cities including Sofia, Plovdiv, Ruse, Blagoyevgrad, and others.

Some of the products presented were:

  •   GlobeCore Bitumen emulsion production units;
  •   GlobeCore Bitumen polymer production units; and
  •   GlobeCore Bitumen Laboratory equipment.

The presentations were attended by road construction industry management professionals and engineers.  GlobeCore representatives provided each attendee wih the most recent equipment catalogs containing the latest product offerings and specifications.

At the end of each presentation, everyone was given the opportunity to speak with GlobeCore’s “Design Engineer” and discuss technical issues and ask questions about GlobeCore equipment and service.

It should be noted that a modified bitumen plant, fully equipped by GlobeCore, has been in operation in Bulgaria since 2009.  Learning of the plant’s operation sparked an interest in GlobeCore’s products by Bulgarian road construction companies in attendance at the presentations.

GlobeCore expresses gratitude to all participants for their interest and hospitality.

The schedule of transformer oil maintenance oil type transformer maintenance

Case Studies Of Oil Reclamation, , , , , , , , , , , , ,

oil type transformer maintenance

The frequency of transformers maintenance depends on the importance, design features and durability of transformers. The first step towards a preventive maintenance program is testing. Testing helps us to determine when a treatment is necessary.

WHY DO WE NEED TO CHECK TRANSFORMER OIL?

Transformer oil is an insulator between the metal parts of the transformer and the wiring within the tank. Over time, the oil can be contaminated with moisture or create combustible gases. By sampling and testing that oil, we can plan repairing or replacing the transformer before a failure occurs.

Maintenance Schedule for Oil Filled Power Transformers

Maintenance or Test

Recommended Interval

 

Reference

Transformer physical inspection

 

Annually

Leakage of oil and reading of MOG (Magnetic Oil Gage) of tanks

Daily

In case of unsatisfactory oil level in the MOG, oil to be filled in transformer and also the transformer tank to be checked for oil leakage. If oil leakage is found take required action to plug the leakage. If silica gel becomes pinkish, it should be replaced.

 

Dielectric strength test (BDV) and moisture content (PPM).

 

Annually

A dielectric strength is a measure of the voltage which is conducted by the transformer oil. At times it is the presence of contaminants which conduct electricity faster than the oil which in turn lowers the dielectric breakdown voltage

Neutralization test

 

Annually

This test which is carried out to ascertain the level of acid which is present in the oil. When oxidation occurs in the transformer oil, it leads to build-up of acid.

Dissolved Gas Analysis Test (DGA)

Annually for 132 KV transformer, once in 2 years for the transformer below 132 KV transformer and in 2 years interval for the transformer above 132 KV transformer.

 

It helps to analyze the gases which are present in the transformer oil.

Bushings– check of oil level

 

Weekly

If it is required, the oil to be filled in the bushing up to correct level. Oil filling to be done under shutdown condition.

 

Bushings –visual inspection

 

Annually

Bushings – visual inspection and cleaning

 

5 years

Interfacial tension test

This is a test which is carried out to detect the presence of polar compounds such as paint, varnish and paper.

Tan & delta test

One in two years

Finally the presence of water too is measured as water can decrease the dielectric breakdown voltage of the transformer oil

Colour test

This test indicates aging, quality and the presence of contaminants in the transformer oil.

Transformer excitation current test

 

5 years

Insulating oil   – DGA, physical,

and chemical tests

 

Anually

Top oil and winding thermometer

Inspection

 

Anually

Oil level indicator operation

 

5 years

Sudden pressure relay

5 years
oil type transformer maintenance

oil type transformer maintenance

So, for getting high performance and long functional life of the transformer, it is desired to perform various maintenance activities. GlobeCores’s oil reclamation equipment will keep your transformer oil in the best condition, providing with oil degassing, water and solids removal as well as acids reducing. It’s a fantastic transformer life!

GlobeCore Has Presented its Equipment in Armenia

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In February, GlobeCore staff delivered another presentation on its equipment.

GlobeCore managers visited Yerevan in order to meet with representatives of the power industry in Armenia.  The peculiarities of equipment, designed to purify and regenerate transformer oil and maintain power transformers were the main topics of the lecture. All the questions arouse were satisfied.

After the samples of used oil were processed on the GlobeCore unit, the people present had no doubts that GlobeCore equipment was able to solve even the most complicated tasks. It is easy-to-use and eco-friendly, reduces operational costs and valuable raw material.

In general, both parties were very satisfied by the results of the meeting. GlobeCore has gained new experience communicating with specialists of the electric power industry and the representatives of Armenia have received a great possibility to solve the problems, accumulated for decades.

Vietnam’s bitumen emulsions modified by GlobeCore’s equipment

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In the beginning of May, a polymer bitumen modification plant UVB-2 was successfully commissioned in Vietnam. The order was made by one of the local construction companies.

The UVB-2 is designed for production of modified bitumen. This includes polymer-bitumen binding, widely used in preparation of top layer asphalt-concrete, protective layers for concrete and cement surfaces, surface treatment of road top, preparation of bitumen-elastomer sealants and roofing materials.