A R Engineering

MIDC, Satara, Maharashtra

The best thing about our Batch Type Trickle Impregnating Machine is that it is suitable for pre-heating, trickling and post heating of stators. Moreover, it is simple to operate and compact in design. Maintaining our Batch Type Trickle Impregnating Machine for a long time is very easy. In addition to this, our Batch Type Trickle Impregnating Machine is ideal for carrying out following automatic cycle :

• Load stators on spindles, connect winding wires, close the front door and start cycle with push button
• Spindles start rotating and get pre-heated to predetermined temperature
• Temperature of stator is sensed by non-contact TIC
• Spindle holding plate is tilted up and varnish pipes are tilted down to adjust the place of trickling
• Varnish pump starts and pre-determined varnish is trickled on stators / rotors and pump stops. Trickle Temperature is maintained with the non-contact TIC
• Spindle holding plate is tilted down and varnish pipes are tilted up and post heating starts
• After completing the post heating spindles, stop
• Open the door & remove wire connections and Un-load the ready stators

Two Stage Transformer Oil Filtration Plant, offered by us, is suitable for degassing, dehydration and filtration of transformer oil under vacuum and achieve oil test results as per I.S standards. It basically works on heating, filtration and vacuum treatment. Our Transformer Oil Filtration Plant has flow rates ranging from 300 LPH to 12000 LPH. We manufacture different models of Transformer Oil Filtration Plant as per the requirements specified by the buyers. We offer Transformer Oil Filtration Plant for on-site filtration, castor mounted for factory and site filtration and stationery for filtration of collected oil. Optional items such as ionic reaction column (for acidity correction), Spirafuge for coarse separation, transformer evacuation system can also be offered with the product.

Our 2-stage degassing plant has following components :

• Prefilter : Oil comes through Transformer/Tank via inlet valve to Pre-filter. It has powerful magnet located inside it. So, it adsorbs all magnetic impurities as well as provides protection to inlet pump which is positive displacement type gear pump.
• Heater Tank : Inlet pump delivers the oil straight towards the heater. Heater tank is designed for heating of oil through indirect type of heating. Heaters are suitably grouped to achieve power economy when oil quantity is less.
• Ionic Reaction Column : This part of machine is used to reduce the acidity of oil. We use activated alumina for the adsorption of acid particles when oil is passed over it.
• Filter Chamber : It has two layers of filters; one is 100 micron rating filter mesh & others are 1 micron rating filter cartridges distributed evenly all over the area. 100 micron mesh is used for increasing the life of filter cartridges as cartridges are to be replaced when choked. It reduces running cost of machine.
• Degassing Chamber : The function of this part is to remove moisture & entrapped gases in the oil. In these type of machines, degassing chamber is divided in 2 stages by siphon. in The first stage connected to vacuum pump, is used for removal of free moisture present in the oil. Second stage degassing chamber is connected to the Booster pump which in turn is connected to high capacity vacuum pump. In this stage, entrapped moisture & gases are removed. In degassing chamber, arrangements are made in  such a way that thin film of oil is exposed to vacuum for maximum period of time with help of shower arrangements, knitmesh packings, etc.
• Outlet Pump : This pump is glandless centrifugal type. This pump takes of De-acidified, filtered & dehydrated oil back to the transformer/ tank.

• Safety Interlocks :
  • If your inlet pump is not turned on, heaters will not get turned on.
  • If by some means, level of oil in degassing chamber rises & in turn rises float, inlet pump is turned off & in turn are the heaters.

• Value-added services :
  • If main supply is connected in reverse rotation, indicator will be glown on panel & no motor will start.
  • Solenoid valves are provided in vacuum lines so as to avoid oil rise into trap when suddenly vacuum pump is stopped & airing is not done.
  • By-pass connection is given in the machine so as to change the positions of hoses, without shutting down the machine.

Single Stage Transformer Oil Filtration Plant that we offer is manufactured under the supervision pf industry experts. Thus, it is the perfect option on which buyers can easily rely. Our Single Stage Degassing Transformer Oil Filtration & Dehydration Plants are suitable for distribution transformers ranging from 100 kVA to 100 MVA. Our Transformer Oil Filtration Plant gives achieve results in the ranges of 70 kV & moisture content in the oil is reduced to 5 – 10 ppm.

Industrial Oil Purification System that we offer has the capacity to purify different types of oils such as hydraulic oils, quenching oils, pyrolysis oil and fuel oil for oil fired burners. Our Industrial Oil Purification System reconditions oils back to their original form. The Industrial Oil Purification System that we offer ensures reduction in maintenance and running cost. We also provide complete assistance in its installation process.

Index Type Trickle Impregnating Machine, offered by us, is suitable for automatic impregnating of stators and rotors by trickle process. Our Index Type Trickle Impregnating Machine is rotated by a chain drive, which rotates the spindles mounted on indexing table at a speed suitable for trickling. Indexing Table is rotated by motor with gear box and limit or proximity switches. One can obtain Index Type Trickle Impregnating Machine from us at a very reasonable price.

Process Carried Out by the Machine :

• Job rotation system : Rotating spindles are mounted on the index table driven by electric motor, gearbox, chain and sprockets. An arrangement is provided such that when jobs come to loading - unloading station, spindles stop rotating for easy removal and placement.
• Heating system : Stators and Rotors are pre heated and cured while passing through the pre heating zone and post heating zone. Radiation type electric heaters do heating in pre-heating and curing zone with temperature control by Digital Temperature Indicating Controller with proportionate temperature control. Both the zones are insulated with glass wool to minimize heat loss. Both the zones are lined with reflective aluminum sheet backed by asbestos cloth for efficient heat reflection and distribution.
• Varnish feeding system : Varnish is fed by peristaltic tube pumps driven by D.C. motors with variable speed control to control varnish quantity according to the models. Pneumatic tube positioning system is provided for proper varnish feeding. Total cycle is automatic except for loading and unloading.
• Centralized control panel : is provided for complete pre-set automatic operation cycle except for loading and unloading. It is provided with cycle parameters settings such as pre-heating and curing temperature, varnish quantity, trickle time, total cycle time, etc. The PLC is provided to control the operation of the machine in proper sequence and safety.

We Manufacture and Export a Range of Oil Cleaning Machine that is Capable of Removing Solid or Liquid Contamination from Any Oil. These Machines are Unique and are Designed Keeping in Mind the Limitations of other Oil Cleaning Machines that are Currently Being Used in the Industry. the Hydraulic Oil Cleaning Machine is Capable of Removing Solid Contamination like Carbon, Metal Particles and Dust from Any Lubricating Oil. Besides, Any Liquid Contamination in the Form of Moisture, Fuel Etc. is also Removed from the Oil. Being One of the Most Reputed Oil Cleaner Machine Manufacturers Across the Globe, Our Highly Efficient Machines Work On the Principle of Absorption to Filter all the Solid Particles. special Features reduces Operating Costs improves Efficiency Through Its Filtration Process Which Takes Place At Regular Intervals prolonged Oil Life improves Life of Various Machine Components major Components pre – Filter in this Major Portion of Coarse Dirt is Removed. Depending Upon the Type of Contaminants Pre-filter Can Be Chosen. magnetic Strainer it is a Magnetic Strainer to Remove Magnetic and Coarse Particles from Oil. magnetic Separator it is Designed to Remove Magnetic Particles from Oil. Disc Magnets are Mounted On a Shaft Driven By Geared Motor At Very Slow Speed. Lower Part of the Discs are Dipped in the Oil and Upper Parts are Provided with Wiper / Scrubber for Removing Particles Collected On Magnets. It is Specifically Provided Where Ferrous Contamination is More Especially in Case of Cutting Oils. intermediate Filter it is Normally Provided to Increase the Life of fine Filter Elements. Normally It is Cleanable to Reduce Filter Replacement Cost. bag Filter it is a Bag Type Filter to Remove Suspended Particles Up to 10 Microns. It is Provided to Increase the Life of the fine Filter Elements. It Has Large Dirt Holding Capacity and Can Be Cleaned Easily for Reuse. spirafuge it Has Filter Element At Center and Spiral Oil Path At the Periphery of the Chamber. Coarse Dirt Separates Here Because of Centrifugal Force Developed By Spiral Oil Motion. Dirt is Collected At Bottom Because of Vortex and On the Walls of Filter Element. Filter Element Can Be Cleaned By Opening the Drain Valve During Running or Automatically By Sensing Backpressure Developed By Dirt Accumulation. It is Provided with Pressure Gauge for Filter Clogging Indication. fine Filter it is Provided to Remove all Suspended Particles, upto 1 or 3 Microns as per the Requirement. It Contains Moulded Cellulose Filter Elements of the Required Rating. These Filters are Normally Provided in Degassing Chamber or in Coalescer or Separate Chamber. Gauge is Provided to Indicate the Filter Clogging. coalescer / Separator the Dictionary Definition of Coalescence is “to Grow Together; to Unite Into One Body or Mass”. as Applied to the Technology of Oil Water Separation, Coalescence is Usually Accomplished By a First Stage of Fibrous Media that Allows Oil to Pass Through But Attracts and “stores” the Emulsified Water Until These Tiny Particles Unite, or Coalesce, to Become Large Droplet of Water. this Free Water is Then Released to a Second Stage Utilizing Water Repellant Media. It Will Be Provided with Water Drain Tank, for Removal of Separated Water Periodically. Pressure Gauge Will Be Provided to Indicate the Clogging of Filter. centrifugal Filter in Centrifugal Filter Oil Passes Through a Rotor Spinning At High Speed So that Particles in the Oil are Deposited On the Inner Wall of Rotor to Form a Dense Cake. It is Particularly More Suitable for Permanent Fitting On the Oil Tank. It Has More Dirt Holding Capacity as Compared to Normal Depth Filter of fine Micron Rating. Centrifugal Separation is Most Suitable Way to Remove Small Hard Metallic Particles. vacuum Dehydrator it is Provided to Remove Moisture from Oil to the Level of 50 Ppm or Less Where Water Contamination is Critical. It is M.s. Fabricated Chamber with Shower Arrangement, Rasching Ring Tray, Sight Glass, Float Switch and Vacuum Pumping System. the Oil Dispersed While Passing Through fine Filter Will Be Sprayed On Raschig Ring Tray to have An Exposure of Oil Film to Vacuum, Because of Which Moisture Removal Rate Will Be Increased. Degassing Chamber Will Be Evacuated with Rotary Oil Sealed Vacuum Pump, Moisture Trap, Valves Etc. oil Transfer and Circulation System the Plant Will have Two Pumps for Oil Transfer and Circulation. Both Pumps Will Be Positive Displacement Gear Type, Directly Coupled with Electric Motor. the Plant Will have Necessary Valves and Piping to Ensure Easy Operation and Maintenance as per the Schematic Diagram. control Panel centralized Control Panel is Provided for Easy and Safe Operation of the Plant as per Requirement of Customer. oil Testing Kit oil Testing Kit Suitable for Measuring Parameters such as Oil Contamination (patch Test), Moisture Content, Viscosity, Total Acid Number Can Be Offered Alongwith System.

These type of transformer oil filtration & dehydration plants mainly used for filtration of power transformers where transformer downtime is very less & results need to be achieved at higher rate. In these types, machine consists of double stage degassing chamber separated by siphon & 50 mm oil head with first stage connected to single vacuum pump & 2nd stage connected to roots-rotary combination of vacuum pumps with working vacuum in the range of 0.1 to 0.2 mbar. From these machines, you will achieve the desired results within 2 to 3 passes of oil through the machine.

We present an exclusive range of Varnishing Machines which have a unique arrangement for adjusting pressure between the varnishing and pressure cylinders.In todays competitive world the electrical insulation materials and the processes are viewed with tremendous quality and cost consciousness as the performance and life of the electrical machines are affected by the quality of the varnishing. The varnishing quality mainly depends on following:

• Insulating & mechanical properties of varnish.
• Proper filling of gaps & voids.

Being one of the most distinguished Manufacturers of a variety of Varnishing Machines, we ensure that the varnishing quality is met. Considering the geometry & quantity of the jobs required we have developed different types of Varnishing Machines including Trickle Varnishing Machines and UV Varnish Machines. All machines are automatic with manual loading & unloading. Moreover, other types of Varnishing Machines that we offer are: BATCH TYPE MACHINES With heating by passing DC current through electrical winding and varnishing with trickle or dip n roll method. INDEX TYPE MACHINES Heating with Ceramic radiation heaters or hot air circulation and varnishing by trickle or dip n roll method. Trickle Impregnation Technique According to the principle of Trickle Impregnation, activated resin is trickled in a thin jet on to the rotating preheated winding. The resin immediately gets heated and its viscosity is reduced. Due to the rotary motion of the winding, the resin gets distributed evenly inside the winding without any drain loss.The heated winding accelerates the gelling and curing of the resin. The resin applied on the winding is quickly sucked through the slots. Assisted by the capillary action it pushes out the trapped air from the small voids and gaps, in the winding and penetrates evenly in all the voids. The essential point for successful application of the trickle impregnating resin is the correct adjustment and the control of the winding temperature.

These type of transformer oil filtration & dehydration plants mainly used for filtration of distribution transformers. In these types, machine consists of single stage degassing chamber connected to single vacuum pump with high ultimate vacuum. From these machines, you will achieve the desired results within 3 to 5 passes of oil through the machine.

Serving the clientele with finest assortment of products, we are a high-flying organization operating from Satara(India). Our payment procedure is not only easy but also safe ensuring your long-term reliance upon us. Whether it is online payment procedure, cash, bank deposits or others, we are here to guide you throughout the process.

Trickle and Roll Dip Impregnation Machine improves the varnishing quality coupled with reduced cost. The varnishing technique used in this machine is now well accepted and used for impregnating stators, fields and armatures, rotors etc. We are one of the prominent Manufacturers and Suppliers of Trickle and Roll Dip Impregnation Machine. We supply Trickle and Roll Dip Impregnation Machine only after the completion of testing procedures.

Trickle Impregnation Technique : According to the principle of Trickle Impregnation, activated resin is trickled in a thin jet on to the rotating preheated winding. The resin immediately gets heated and its viscosity is reduced. Due to the rotary motion of the winding the resin gets distributed evenly inside the winding without any drain loss. The heated winding accelerates the gelling and curing of the resin.
The resin applied on the winding is quickly sucked through the slots. Assisted by the capillary action it pushes out the trapped air from the small voids and gaps in the winding and penetrates evenly in all the voids.
The essential point for successful application of the trickle impregnating resin is the correct adjustment and the control of the winding temperature.

Design of a trickle Impregnation Plant :The design of a trickle Impregnation Plant plays a vital role in ensuring the uniform quality of a trickle impregnation. Any trickle impregnation plant should have the following essential features.
Automated Cycle, independent of operator.

• Arrangement for quick mounting and for making the connections of resistance heating.
• Precise temperature control of the winding.
• Accurately metered resin quantity required for the component.

The trickle impregnation plants with the above features are custom built taking into account several factors such as production rate, size and shape of the component, type of trickle resin etc.Mainly three types of trickle impregnation plants are popular for various types of components.


Multi Spindle Trickle Impregnation plant. (Batch type) : It is ideal for stators of A. C. motors. Depending on the production rate the quantity of the spindles can be decided.

Multi Spindle Rotary Indexing Type Trickle Plant : It is ideal for medium size stators and rotors e.g. armature and field coils of hand tools, auto electrical, household appliances etc. High production rates of 60 to 120 jobs per hour are possible with these plants.

Conveyorised Trickle Impregnation Plant : This plant is similar to that of indexing type. However a chain conveyor carries the components instead of indexing movement. This plant is especially suitable for large output of impregnated small and medium sized components. Generally this plant is installed in a conveyor production line of components.

Advantages of Trickle Impregnation : Trickle impregnation process is especially characterized by its low energy cost due to a very short cycle time compared to Dip varnishing or the Vacuum impregnation. Compared to the Dip and bake varnishing method, which uses varnishes containing 50 to 55% solvents and the impregnation cycle of 8 hrs to 24 hrs. Trickle impregnation cycle times are substantially low to the tune of 20 min. to 40 min. Hence it is quite evident that trickle impregnation process offers the most cost economical answer to the impregnation process.

Vacuum Pressure Impregnation (VPI) is a process that uses vacuum and pressure to seal porous materials with varnish or resin. The process is used primarily for high-voltage motors and generators to fill gaps in materials to create a void free insulation in various devices.

The Vacuum Pressure Impregnation Process

AR Engineering specializes in vacuum pressure impregnation, which is more effective than traditional dip-and-bake methods and is better suited to high voltage motors and generators. Our basic vacuum pressure impregnation motor repair process comprises several steps.

PreheatingWe place the equipment in an oven that heats the equipment and allows moisture to evaporate. This helps the resin better penetrate the material.

Vacuum DryingWe remove the equipment from the oven and place it into a vacuum chamber, which removes air and any remaining moisture.

FillingWe fill the chamber with resin, coating the part and filling in all the gaps and pores in the piece of equipment.

Wet VacuumingWe reduce the vacuum levels and hold it for a set period of time.

Pressure/SoakingWe increase pressure within the chamber using dry air, nitrogen, or other gases. This allows for even deeper penetration of the resin.

DrainingWe then vent the pressure, drain the chamber of excess resin, and remove the part.

CuringFinally, the equipment is placed into an oven to cure the resin.

Vacuum Pressure Impregnation Plant

Vacuum Pressure Impregnation (VPI) is a process that uses vacuum and pressure to seal porous materials with varnish or resin. The process is used primarily for high-voltage motors and generators to fill gaps in materials to create a void free insulation in various devices.

The Vacuum Pressure Impregnation Process

AR Engineering specializes in vacuum pressure impregnation, which is more effective than traditional dip-and-bake methods and is better suited to high voltage motors and generators. Our basic vacuum pressure impregnation motor repair process comprises several steps.

Preheating

We place the equipment in an oven that heats the equipment and allows moisture to evaporate. This helps the resin better penetrate the material.

Vacuum Drying

We remove the equipment from the oven and place it into a vacuum chamber, which removes air and any remaining moisture.

Filling

We fill the chamber with resin, coating the part and filling in all the gaps and pores in the piece of equipment.

Wet Vacuuming

We reduce the vacuum levels and hold it for a set period of time.

Pressure/Soaking

We increase pressure within the chamber using dry air, nitrogen, or other gases. This allows for even deeper penetration of the resin.

Draining

We then vent the pressure, drain the chamber of excess resin, and remove the part.

Curing

Finally, the equipment is placed into an oven to cure the resin.

Impregnation Types:

• Varnish Impregnation
• Oil Impregnation
• Casting Impregnation

The Benefits of VPI

In traditional impregnation, varnishes can lose up to 50% of their volume in the curing process. The reduced volume leads to air pockets and gaps, making it more susceptible to damage and wear. The vacuum used in a VPI creates a more solid structure that can withstand:

• Leaks
• Cracks
• Corrosion
• Moisture

VPI also accommodates longer insulation life and greater heat dissipation. Vacuum pressure impregnation is a more cost-effective solution as it extends the lifetime of products while saving energy.