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Transformer Oil Filtration Plant

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Transformer Oil Filtration Plant

We bring forth a comprehensive range of Transformer Oil Filtration Plant that is suitable for all types of electrical insulating oils. Our line of High-Vacuum Transformer Oil Filtration and Dehydration Plants are capable of removing moisture (free as well as dissolved), gases, dirt and oxidation products from mineral-based, and synthetic silicon oils and others. Our high standards Transformer Oil Filtration Plant works on the low temperature, high vacuum principle. These systems are in flow rates from 300 LPH to 12000 LPH. We can also offer the clients custom-built plants as per their specifications.

Transformer / Insulating Oil Filtration and Dehydration Plants / Purifiers are available for :

  • Transformer and capacitor manufacturers : Skid mounted plants for preparation of new oils prior to apparatus filling and impregnation.
  •  Transformer Repairers : Complete plants for preparation of new oils and regeneration of used oils for reuse. We can provide the purification system you need as well as vacuum storage tanks and transformer filling and emptying / pumping station.
  • Transformer Owners : Portable plants are available in a variety of trailer-types and sizes to allow on-site servicing of transformer oil right in the substation. Trailers are available with a wide variety of options including laboratory space, oil-testing equipment. Plants are designed for drying out of the transformer insulation and oil filling and impregnation under vacuum. Hot oil circulation and hot oil spray methods can also be used.


Plants are available in different types of constructions such as open & enclosed models, stationery, portable & mobile models, with single & double stage degassing / dehydration system.

 

Generally the plants are as per the schematic diagram attached. The plants mainly consist of following major components :

Working Systems :

  • Oil Transfer & Circulating System : It mainly consists of Inlet Pump (Gear type positive displacement), Outlet Pump (Positive displacement Gear type or Glandless Centrifugal) and necessary valves & piping as per the schematic diagram to ensure easy operation and maintenance. Complete system is vacuum tight to have a leak-proof operation. The piping joints are flanged type with O’rings. Chambers are provided with suitable draining arrangement.

 

  •     Heating System :
    • It is capable of heating the oil from 25°C to 80°C. It contains Insulated heat exchanger with indirect low watt density (Less than 2W/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. It will be provided with
    • Indirect Type Heating Elements made out of Nichrome wire elements fixed in refractory formers and inserted in finned MS tubes welded to heater chamber plate. Watt Density will be less than 2 Watts / cm2.
    • Temperature Control : Thermostatic
    • Temperature Indication : Dial Stem Type Thermometer.
    • Thermal Insulation : Glass Wool enclosed with CRCA sheets
  • Filtration System : It is suitable for removing suspended particles such as colloidal carbon, oxidation sludge, dirt, rust, up to < 1 micron. It consists of PRE FILTER, INTERMEDIATE FILTER and FINE FILTER elements :
    • Pre Filter : 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 is provided to increase life of fine filter elements.
  •     Degassing & Dehydration Chamber :
    • It is designed to remove large portion of dissolved impurities (Including Moisture) from oil. Knitmesh packing trays and oil dispersing system are provided to have sufficient exposure of oil to vacuum during filtration. Oil level is controlled with float switch. It will be provided with :
    • Shower arrangement and Raschig ring trays for formation of thin oil film to get more exposure of oil to vacuum
    • Siphon seal to ensure longer travel of oil during degassing (for 2V plants)
    • Sight glasses, illuminating lamps and float switch to control oil level
    • PRV before degassing chamber & SCV after Outlet Pump will be provided to avoid flooding of degassing chamber in case of power failure
  •     Vacuum System : It will consist of following components
    • Vacuum Pump : Rotary Oil Sealed Pump with following specifications
    • Free air displacement -*** LPM.
    • Make - M/s Indo-Woo sung or similar
    • Electric Motor – ** H.P. Foot Mounted
    • Working Vacuum - < 5 torr, Ultimate vacuum- < 0.005 torr
  • For Second Stage of Degassing (Only For 2V Plants) :
    • Roots Pump : Free Air Displacement: *** M³/Hr
    • Make – M/s Everest or similar
    • Electric Motor – ** H.P. Flange Mounted
    • Vacuum Pump : Rotary Oil Sealed Pump with following specifications
    • Free air displacement - *** LPM.
    • Make - M/s Indo-Woo sung or similar
    • Electric Motor – ** H.P. Foot Mounted
    • Working Vacuum - <0.1 torr, Ultimate vacuum - 0.001torr
    • It will be provided with Moisture Traps (water cooled) with drain, airing valve, NRV, Vacuum Gauge will be provided as per the schematic diagram.
    • Gauges and Instruments :The plant will be provided with following gauges and instruments for easy operation and control of it :
    • Pressure Gauge : 0 – 7 Kgf / cm², Glycerin filled Bourdon Dial type Ø 63 / 100 mm, M/s Shreeji or similar make
    • Thermometer : 0-150oC, Dial stem type. Ø 63 / 100 * 150 mm stem Length, M/s Shreeji or similar make
    • Thermostat : 30-110oC, Capillary type. Sai-Ego or similar make
    • Float Switch : Float operated magnetic reed switch, RS Model, M/s Sukrut make
    • Vacuum Gauge : 0 – 760 mm of Hg Bourdon Dial Type Ø 63 / 100 mm, M/s Shreeji or similar make
    • Digital Vacuum Gauge : Ace Instruments make.(Only for 2V plants)

 

  • Valves and Piping : The plant will have necessary valves and piping for easy operation and maintenance of the plant as follows :
    • Oil Valves : ** NB Ball type valves with seals suitable for under vacuum operation. Itap Italy, R / N USA or similar make
    • Drain Valves : 15 & ** NB Ball type valves with seals suitable for under vacuum operation. Itap Italy, R / N USA or similar make
    • Airing Valve : Quick Release types 10 NB, AR Engineering Make. Solenoid valve (for 2V plants
    • Flow Control Valve : Needle or Piston type, AR Engineering Make
    • Vacuum Valve : ** NB Ball type valves with seals suitable for under vacuum operation. Itap Italy, R / N USA or similar make
    • Swing Check Valves : ** NB Ball type valves with seals suitable for under vacuum operation. Itap Italy, R / N USA or similar make
    • sPRV : ** NB Ball type valves with seals suitable for under vacuum operation. Itap Italy, R / N USA or similar make
    • Pipe Connections : Flange type with synthetic rubber O-ring. AR Engineering Make
    • Inlet and Outlet Hoses : ** NB Synthetic Rubber reinforced or nylon braided with quick coupling
  • Control Panel :
    The plant will have centralized control panel for easy and safe operation of the plant. It will have necessary Electrical Control Contactors, Pilot lamps, push buttons, back-up fuses, connectors strips, MCB, Isolator switch etc. All material used in the plant will be of Reputed Make such as GE, English Electric, Siemens, MDS, Anchor, Kaycee, Datar, etc. The plant will have following inter locks :
    • Inlet Pump – Heaters : Heaters will not be ON unless inlet pump is ON
    • Float Switch – Inlet Pump : Inlet Pump will be off when oil level rises
    • Thermostat – Heaters : Heaters will be off when temperature risesBooster pump – Vacuum Gauge Relay : Booster is ON only when vacuum is < 50 torr ( Only for 2V plants)

  • Optionals :
    • Ionic Reaction Column : It will be fabricated out of MS sheets, plates. It will contain sufficient quantity of activated alumina (** Kgs) for reduction of acidity level of oil to less than 0.05 mg of KOH / gm oil. It will be provided with, By-pass arrangement when not necessary & Alumina Cage (fabricated with CRCA caps & SS wire mesh) for easy replacement. It is fitted on the plants of flow rate > 2400 LPH as a standard fitting and bypass arrangement.
    • Transformer Evacuation System : It will be suitable for working vacuum of either 5 – 10 torr or 0.1 – 0.5 torr. It will be provided with Rotary Oil Sealed Pump or Roots Rotary combination along with Moisture Traps (water cooled) with drain, airing valve, NRV, Vacuum Gauge will be provided as per the schematic diagram.

    Plant Can Be Supplied with Followings :
  • BDV Testing KitOn Line Moisture Measurement Kit
  • Acidity Testing Kit
  • Flow Meter

Points For Selection of Plants :

  • Range of Sizes of Transformers : Flow Rate is Decided
  • Location of Transformers to Be Filtered : Mounting & Construction Type is Decided.
  • Requirement of Oil Quality & Time Available for Filtration & Drying : Working Vacuum is Decided
  • Working Vacuum : Single or Two Stage Degassing is Decided


How To Configure The Model :

  • T : For Transformer Oil
  • O : For Open Construction Without Canopy
  • E : Enclosed Construction with Fabricated Canopy with Doors for Easy Operation & Maintenance.
  • S : Stationery Construction Suitable for Indoor Use and for Permanently Fitting On Vehicle for Out Door Use (enclosed Models)
  • P : Portable Model Suitable for Indoor Movement. Smaller Plants Can Be Carried in the Vehicle for On Site Operation.
  • M : Mobile Plants Suitable for On Site Operation Can Be Towed with Jeep or Tractor.
  • 1V : For Single Stage Degassing System
  • 2V : For Two Stage Degassing System

last Figure Will Indicate Flow Rate in Lph / 10.



Technical Details

Our single stage plants (Models 1V) are capable of attaining following oil parameter in 3-5 passes and Two Stage Plants (Models 2V) in 1-3 passes depending on the oil condition :

Parameters Units Before Filtration After Filtration
Break Down Voltage with 2.5mm Electrode Gap. kV 25 >50- 70
Moisture Removal ppm 50-100 Up to < 5 - 10
Neutralization Value mg of KOH/g 0.5 < 0.1
Particle size (Filter Fineness) Micron Visible <1
Gas Content % Vol./Vol. <10% < 0.1%

 

WORKING VACUUM - < 5 TORR / ULTIMATE VACUUM OF PUMPING SYSTEM - 0.001 TORR
FLOW RATE LPH 600 1200 2400 4500 6000 8000
HEATER POWER kW 6 18 45 72 84 108
Nos*kW 3 * 2 6 * 3 15 * 3 18 * 4 21 * 4 27 * 4
MOTOR POWER INLET PUMP HP 0.5 0.5 1.5 2 3 5
OUTLET PUMP HP 0.5 0.75 2 5 5 7.5
VACUUM PUMP HP 0.5 0.75 1.5 2 5 5
VACUUM PUMP FREE AIR DISPLACEMENT LPM 100 300 600 1000 1500 2000
ULTIMATE VACUUM WITHGB OPEN 0.001 TORR
FILTER ELEMENTS Moulded Cellulose Ø 63 * 500 L 1 2 4 8 10 12
1 micron nominalrating
MOUNTING OVERALL DIMENSIONS WIDTH * LENGTH *HEIGHT IN CMS.
OPEN SKID Suitable for factoryinstallation 65*85*130 85*110*135 100*200*170 120*220*180 165*270*200 165*280*200
ENCLOSED SKID Suitable for mountingon vehicle 70*95*145 90*115*150 110*210*200 135*240*205 180*300*230 180*310*230
OPEN ON CASTORS Suitable for carryingin vehicle & inside factory 65*85*145 85*110*150 100*200*190 N / A N / A N / A
ENCLOSED ON TRAILOR Suitable for towingwith Jeep / Tractor 150*190*185 150*190*190 165*285*220 165*350*265 180*380*275 180*400*280
SUITABLE FORTRANSFORMERS DIST. TRF UP TO 1 MVA DIST. TRF UP TO 5 MVA TRF UP TO 25 MVA TRF UP TO 75 MVA TRF UP TO 100 MVA TRF UP TO 150 MVA

 

WORKING VACUUM - < 0.5 TORR / ULTIMATE VACUUM OF PUMPING SYSTEM - 0.001 TORR
FLOW RATE LPH 600 1200 2400 4500 6000 8000
HEATER POWER kW 9 27 54 72 84 108
Nos*kW 3 * 3 9 * 3 18 * 3 18 * 4 21 * 4 27 * 4
MOTOR POWER INLET PUMP HP 0.5 0.5 1.5 2 3 5
OUTLET PUMP HP 0.5 0.75 2 5 5 7.5
VACUUM PUMP-1 HP N/A N/A N/A 1 1.5 2
VACUUM PUMP-2   1.5 2 1.5 1.5 2 3
BOOSTER PUMP HP N/A N / A 1 2 3 3
VACUUM SYSTEM FREE AIR DIPLACEMENT VP - 1 N/A N/A N/A 300 LPM 600 LPM 1000 LPM
VP - 2 600 LPM 1000 LPM 600 LPM 600LPM 1000 LPM 1500 LPM
MBP N/A N/A 250 M³/Hr 400 M³/Hr 800 M³/Hr 800 M³/Hr
FILTER ELEMENTS Moulded Cellulose Ø 63 * 500 L 1 2 4 8 10 12
1 micron nominal rating
MOUNTING OVERALL DIMENSIONS WIDTH * LENGTH * HEIGHT IN CMS.
OPEN SKID Suitable for factory installation 90*120*175 90*160*185 120*220*200 120*250*180 180*290*220 180*300*220
ENCLOSED SKID Suitable for mounting on vehicle 95*125*200 95*165*210 110*210*200 135*240*205 180*300*230 180*310*230
OPEN ON CASTORS Suitable for carrying in vehicle & inside factory 90*120*190 90*160*200 120*220*220 N / A N / A N / A
ENCLOSED ON TRAILOR Suitable for towing with Jeep / Tractor 160*250*230 160*280*230 160*340*260 160*360*270 180*400*290 180*400*290
SUITABLE FOR TRANSFORMERS DIST. TRF UP TO 1 MVA DIST. TRF UP TO 5 MVA TRF UP TO 50 MVA TRF UP TO 100 MVA TRF UP TO 150 MVA TRF UP TO 200 MVA

Technical Details

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