1. NEW OIL REGENERATION PLANT
WITH REACTIVATED
FULLER’S EARTH 1

2. Oil regeneration 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. 2 2

3. Benefit of the oil regeneration process compared to conventional purification system.
Remove contaminants such as acids, sludge, anilines
and 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) 3

4. Strengths & Weaknesses of the different solutions to solve acidity
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 process
Short pay back return
No oil to eliminate
No subject to oil price fluctuation or shortage
Clean out the transformer
Specific equipment required
Not a lot of equipment available
Graduate people required 4

5. 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 operations
Few people for Fuller’s Earth replacement. 5

6. ARRAS MAXEI Advantages
-More than 60 years of experience in oil treatment
plant manufacturing
-Manufacturing complying with CE regulation standards
-On going Research and Development
Improved reactivation control
New column design
Friendly touch control panel
-Reliable and convenient after sales service 6

7. ERP 5000 SINGLE PASS QUALITY
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 7

8. ARRAS MAXEI Product range
MAS 5000 ERP
6 Columns
MAS 5000
ERP
9 Columns
12 Columns
ERP Dual
bank of columns
Flow rate
5000 l/h
Regenerated oil
2400 l/day
3600 l/day
4800 l/day
Capacity x 2
Filtration
1µm absolute
Treatment heating power
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
Vacuum in treatment (mbar)
0,5 to 5
Fullers earth quantity
600 kgs
900 kgs
1200 kgs
Nbre columns x 100 kgs 8

9. Main Characteristics :
Off-line or on-line treatment and regeneration
Fully automatic control:
-Continuous control of overpressures in the piping
network.
-Automatic foam regulation
-Continuous control of overpressures, temperature, water content and filter clogging.
-oil heating system.
-Continuous control of the oil level in the transformer and plant
-Buchholz control connected to plant PLC
Double filtration: -7 µ absolute at the inlet
-1 µ absolute at the outlet
Connexions: - Special insulation valves with
progressive opening at the transformer
inlet and outlet
-Transformer by-pass valve utilized
during start up procedure.
-Plant earthed to transformer earth strep. 9

10. Options: On-line water PPM measurement:
Colour comparison control to launch the reactivation process
Air conditioned for control room
Remote control to GSM Network (Alarms or alarms and treatment parameters)
Additional vacuum pump for transformer excavation
DBPC injection system
Cable reel 10

11. General layout 11

12. Container design for easy access and maintenance
Presentation
SKID
SEMI TRAILER
Container design for easy access and maintenance
SEA CONTAINER (20’ OR 40’)° 12