TRASFORMER OIL FILTRATION AND DEHYDRATION PLANT

 
We manufacture different types of plants for the purification / up-gradation of the  mineral Transformer Oil to standard specifications. These plants cover entire range of low, high and extra high voltage equipment such as transformers. These Plants are designed and manufactured to suit specific requirements of customers. 
The plants are available in various designs and capacities to carry out following operations:

Removal of all suspended particles such as dust, rust, scales, colloidal   carbon oxidation sludge etc. up to < 1 micron. Degassing and Dehumidification of Transformer Oil under vacuum. Circulation of heated Oil and Filling of treated oil in Transformer tank. De-acidification by evaporation and adsorption method.
Our single stage plants are capable of attaining following oil parameters in 3-4 passes and  Two  Stage Plants in 1-2 passes:  
     

 


SR NO
 PARAMETERS BEFORE FILTRATION AFTER FILTRATION
1
Break Down Voltage with 2.5 mm Electrode Gap.
 25 kV. 50-70 kV.
2
Moisture Removal
 50-100 ppm Up to < 5 ppm.
3
Neutralization Value
 0.5 mg of KOH/gm of oil < 0.1 mg of KOH/gm of oil
4
Particle size (Filter Fineness)
 Visible to naked eye Up to < 1 micron
5
Gas Content
 <10% by volume < 0.1% by volume


                               Portable Type                                                           Mobile type

PRODUCT HIGHLIGHTS
  1. DESIGNED AND MANUFACTURED TO SUIT CUSTOMER'S REQUIREMENT
  2. PLANTS WITH MINIMUM AND EASY MAINTENANCE
  3. LOW OPERATING COST DUE TO HIGH VACUUM FILTRATION WITH ROTARY OIL SEALED PUMPS
  4. PLANTS ARE ALSO SUITABLE FOR HYDRAULIC OIL, TURBINE OIL, ETC.

 

 

MAJOR COMPONENTS



OIL TRANSFER & CIRCULATING SYSTEM
Mainly consists of inlet pump (Gear type positive  displacement), Outlet pump (positive displacement Gear type or Multistage Centrifugal) and necessary  valves & piping to ensure easy operation and maintenance. Complete system is vacuum tight to have a leak -proof operation.       

HEATING SYSTEM     
It is capable of heating the oil 25 o C to 80 o C. It contains insulated heat exchanger with indirect low watt density (Less than 2 W/cm2) bobbin type electric heaters. Oil temperature is controlled with thermostat. Suitable oil distribution system is provided to ensure uniform flow of oil over heaters.

FILTRATION SYSTEM
It is suitable for removing suspended particles such as colloidal carbon, oxidation  sludge, dirt, rust, scales up to < 1 micron. It consists of PRE FILTER and FINE FILTER.

PRE FILTER                                
It is a metallic strainer with magnet. It removes magnetic and coarse suspended particles and to protect inlet pump from damage due to abrasion.

FINE FILTER   
Removes all suspended particles up to < 1 micron. Filter Elements are   either non-hygroscopic molded cellulose cartridges or cleanable (with reverse airflow) edge type filter candles. Filter cartridges are easily replaceable. Additional Intermediate filter can be provided to increase life of fine filter.

DEGASSING & DEHYDRATION CHAMBER  
It is designed to remove large portion of dissolved impurities (Including Moisture) from oil. Rasching ring trays and oil dispersing system are provided to have sufficient exposure of oil to vacuum during filtration. Oil level is controlled with float switch.

VACUUM SYSTEM 
Rotary oil-sealed vacuum pump or combination of Mechanical Booster Pump and Rotary oil-sealed pump is provided to get proper working vacuum during filtration. Necessary valves for easy operation and maintenance of the plant.

CONTROL PANEL
Centralized control panel is provided with necessary contactors, overload relays, fuses, push buttons, indicating lamps, main switch etc. for easy and safe operation of the plant.

OPTIONAL ITEMS

Ionic Reaction Column for acidity removal.

Transformer Evacuation System.

Filter Press as an intermediate filter to increase the cartridge life.

Additional Instrumentation such as Temperature Indicating Controller, Flow Meter, On-line Oil Testing Equipment.

 


TRANSFORMER OIL FILTRATION & DEHYDRATION (SINGLE STAGE)

These plants are designed for filtration and dehydration of Power and Distribution Transformers and oil in tank. These plants can also be used for hot oil circulation in transformers and transformer drying. These plants are available in Series S (Stationery Units), Series P (Units on Castors) and Series M (Units on Trailer)

                 TECHNICAL SPECIFICATIONS

Flow Rate - LPH

600

1200

2400

4500

6000

Heater Capacity - kW

6

18

45

63

81

Technical Specifications

1-V-060

1-V-120

1-V-240

1-V-450

1-V-600

Single Stage Rotary Oil sealed vacuum Pump

100 LPM

300 LPM

500 LPM

1000 LPM

2000 LPM

Total Power Required

7.5 kW.

20 kW.

50 kW.

70 kW.

96 kW.

Fine Filter Elements Moulded Cellulose

2

4

9

18

27

Filter Fineness

3 / 0.5 µ

Dimensions in Mtrs

Stationery Unit, W/L/H

0.6/0.9/1.4

0.8/1.2/1.5

1.0/1.8/1.6

1.2/2.0/1.7

1.2/2.4/1.8

Unit on Castors, W/L/H

0.6/0.9/1.6

0.8/1.2/1.7

1.0/1.8/1.9

1.2/2.0/2.0

1.2/2.4/2.1

Unit on Trailer, W/L/H

1.2/1.4/2.1

1.4/1.7/2.2

1.6/2.2/2.4

1.8/2.4/2.6

1.8/2.8/2.6

Max Oil Content in Transformer -  Ltrs.

1000

2500

7500

20000

35000

 

TRANSFORMER OIL FILTRATION & DEHYDRATION PLANTS (TWO STAGE)

 These plants work on high vacuum and are designed for filtration and dehydration especially of Power Transformers at site.


Technical Specifications

2-V-060

2-V-120

2-V-240

2-V-500

2-V-800


Flow Rate - LPH

600

1200

2400

5000

8000


Heater Capacity - kW

9

27

54

81

108


Roots pump backed by Two Stage Rotary Oil sealed vacuum Pump

60 M3 / Hr.

100 M3 / Hr

200 M3 / Hr.

400 M3 / Hr

600 M3 / Hr.


Total Power Required (KW)

10.5

29

60

87

115


Fine Filter Elements Moulded Cellulose

2

4

9

18

27


Filter Fineness

3 / 0.5 µ

Dimensions In Mtrs.


Stationery Unit-S W/L/H

0.6/0.9/1.4

1.0/1.6/2.0

1.0/2.1/2.0

1.2/2.5/2.0

1.2/2.6/2.2


Unit on Castors-P W/L/H

0.6/0.9/1.6

1.0/1.6/2.2

1.0/2.1/2.2

1.2/2.5/2.2

1.2/2.6/2.6


Unit on Trailer-M W/L/H

1.2/1.4/2.1

1.0/1.6/2.6

1.0/2.1/2.6

1.8/2.5/2.8

1.8/2.8/3.0


Max Oil Content in
 Transformer - Ltrs.

1000

2500

10000

25000

50000

 


Guidelines for Selection of plant as per requirements

Basic Design: Single Flow Pass Design (Two Stage Plant) is suitable for filtration of high voltage transformers and Multiple Flow Pass design (Single Stage Plant) is suitable for low and medium voltage Transformers.

Flow Rate: is decided by the quantity of oil to be filtered and the time available for filtration.

Optional Items can be added depending on the need of filtration, oil purification such as Ionic Reaction Column for acidity removal, Filter Press for more dirt accumulation, Transformer Evacuation System for filtration and oil filling under vacuum.

Stationary / Portable / Mobile plants are selected according to place for filtration. Stationary plants are useful for transformer manufacturer / repairers who carry out filtration in factory. Mobile / Portable plants are suitable for filtration at site. Portable plants are more suitable when: a) the number of transformers to be filtered is large and, b) the location of transformers is difficult to reach with conventional trailer mounted machines.

AR ENGINEERING
L-77,Additional M.I.D.C.Satara-415004
PH- 091-02162-44385,Fax:02162-47569
E-mail: arengineering@vsnl.com

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