GlobeCore Transformer Oil Regeneration Plant with Fuller Earth reactivation system CMM 12R/4000:

- increases breakdown voltage

- reconstitutes oil chemical composition

- refines oil color

- increases oxidation stability

- decreases gas dissolving capacity

- reactivates Fuller earth up to 300 times free of replacement

- easy to operate and service

- operates simultaneously with drying and degassing plants

- treats transformer on-line

- treats any transformer oil.

Scope of application.

Many of industrial electric systems contain dielectric oils. Extending the lifetime of the equipment and the oil it contains requires the dielectrics to be prepared and periodically treated. Thermal vacuum drying and degassing of dielectrics is a method of such treatment. In combination with filtration this technique allows to extend the life time of oil filled equipment significantly.

Long term use of oils causes the oils to degrade thermally and chemically. The products of such degradation are chemical elements adversely affecting the oil’s dielectric properties as well as operation of electric equipment. This problem is solved by periodic oil regeneration.

The plant is used during installation, maintenance and operation of oil-filled high voltage equipment (power transformers, high-voltage switchgear, etc.).

The plant is designed for processing of electric insulation oils and servicing of transformers.

The process of dielectric oil treatment includes the following:

Removal of gases solved in the oil.

Removal of free and dissolved water.

Removal of solid particles.

Removal of oil decomposition products.

Transformer servicing includes:

Transformer evacuation.

Heating of the transformer and the active part of the windings with hot oil.

Removal of sediment from the windings.

Specifications.

Parameter Unit Value

Max throughput m3/hour 4

Max oil temperature оС 90

Output pressure bar 2,5

Oil heater power kW 75

Vacuum system nominal suction rate m3/hour 280

Fuller’s earth load kg 1800

Max power consumption kW 95

Power supply

Phases 3p+1N+PE

Voltage V

AC frequency Hz

Connections

Oil input DN 40/Camlock C150

Oil output DN 40/Camlock C150

Transformer evacuation inlet DN Flange DN80

Vacuum pump exhaust DN 50

Reactivation exhaust DN 50

Filter elements specifications

Coarse filter (mesh strainer) m 100

Pre-filter with filtering element m 25

Regeneration section filter with filtering element m 0,3х2

Fine filter with filtering element m

1

Dimensions/no trailer

Length mm 11500

Width mm 2090

Height mm 2110

Weight kg 20000

New oil specifications after processing

Parameter Unit Value

One heat and vacuum degassing cycle

Moisture content by weigth ppm 5

Gas content by volume Vol % 0.1

Three heat and vacuum degassing cycles

Moisture content by weigth ppm 3

Gas content by volume Vol % 0.05

Used oil specifications after regeneration

Parameter Unit Value

One heat anc vacuum degassing cycle

Moisture content by weight ppm 5

Gas content by volume Vol % 0.1

Acidity, as per IEC 296; ASTM D-664 mgКОН/g 0.01

Corrosive sulfur as per ISO 5662; ASTM D-1275 ----

Dielectric strength, as per IEC 156; ASTM D-1816 kV 70

Interfacial tension, at 25ºС as per ISO 6295; ASTM D-2285 N/m 45

Dissipation factor at 90ºС as per IEC 247; ASTM D-924 0,001

Attention! Oil specification may vary depending on initial oil condition.

Description of the plant

The unit is built on a frame, including the following sections:

Oil regeneration section

Oil degassing section

Operator room