NEW OIL REGENERATION PLANT WITH REACTIVATED

FULLER’S EARTH

Applications: Reduction in oil acidity from 0.4 mg Koh/gm to 0.03 mg Koh/gm.

Advantages: The same quantity of Fuller’s earth can be used >300 times due to the unique reactivation process.

Oil regeneration with reactivated Fuller’s Earth

Benefit of the oil regeneration process compared to conventional purification system.

Remove contaminants such as acids, sludge, anilinesand decaying products.

-Improve color, oxidation stability, Interfacial tension and power factor

-Extend the oil life-time cycle

-Extend more significantly the life-time cycle of power transformers (with regular regeneration treatment)

Strengths & Weaknesses of the different solutions to solve acidity

Strengths Weaknesses

Change the oil to a new or reclaimed oil

No specific equipment required: (oil pump, oil treatment plant, tank,..)No graduate people required

Power shutdown Subject to new oil price $$$$$ or difficult to find reclaimed oil.Old oil has to be disposal or resale for third applications at very low price.Short term solutions, no clean out of the transformer.Several people requested

Regenerate the oil

No power shutdown during regeneration processShort pay back returnNo oil to eliminateNo subject to oil price fluctuation or shortageClean out the transformer

Specific equipment requiredNot a lot of equipment availableGraduate people required

Main differences between both solutions to regenerate dielectric oil

Regeneration with disposable Fuller’s earth

Regeneration with reactivated Fuller’s earth

Oil losses 6% 0,4%

Fuller’s earth losses

100% 0,01% by reactivation (limit 70% before replacement)

Tasks Replacement of Fuller’s earth at saturation

Replacement almost once a year

Workforce Several people to handle operations

One people for normal operationsFew people for Fuller’s Earth replacement.

Oil test results (general)

TEST DESCRIPTION METHOD UNIT INITIAL OIL CONDITION

ERP 5000 SINGLE PASS

QUALITY

GAS CONTENT GC %v/v 8 0,01

IFT ASTM Dynes/cm <15 >40

COLOR APPEARANCE -- Visual Brown/Cloudy Clear Light Yellow

TAN DELTA (90°C) IEC 247 -- <0,01 <0,005

OXIDATION STABILITY IEC 74 164 HRS

-- Depleted Restored

MOISTURE IEC 733 ppm <200 5

BREAKDOWN VOLT IEC 156 kV <30 >75

ACIDITY IEC 296 mgKOH/gm 0,4 <0,03

ARRAS MAXEI Product range

MAS 5000 ERP

6 Columns

MAS 5000 ERP

9 Columns

MAS 5000 ERP

12 Columns

MAS 5000 ERP Dual

bank of columns

Flow rate 5000 l/h 5000 l/h 5000 l/h 5000 l/h

Regenerated oil

2400 l/day 3600 l/day 4800 l/day Capacity x 2

Filtration 1µm absolute 1µm absolute 1µm absolute1µm absolute

Treatment heating power

80 k W 80 k W 80 k W 80 kW

Reactivation heating power

36 kW 54 kW 72 kW 3 kW per column

Total heating power

116 kW 134 kW 152 kW Reactivation+ Treatment heating power

Limit vacuum closed suction

0,5 mbar 0,5 mbar 0,5 mbar 0,5 mbar

Vacuum in treatment

(mbar)

0,5 to 5 0,5 to 5 0,5 to 5 0,5 to 5

Fullers earth quantity

600 kgs 900 kgs 1200 kgs Nbre columns x 100 kgs

General layout

Presentation

SEA CONTAINER (20’ OR 40’)°

SEMI TRAILER

Container design for easy access and

maintenance

SKID