In order to obtain void-free epoxy castings with low partial discharge and good du-electric strength suitable for use at high voltage it is necessary, among other things, to mix the resin & pre-dried filler well, to de-aerate it by vacuum and finally to pour it, also in vacuum.

The mixing chamber with circular cone-shaped bottom is heated with an oil jacket, the temperature being measured and controlled continuously. The temperature of the wall is hence uniform. A stirrer with baffle rotating at the correct speed which gives shearing action causes thorough resin filler mixing. The agitation exposes all the mix to vacuum& thus degassing is thorough. The mixing paddle drive is with 3 phase motor & reduction gear. The shaft seal is robust rotary seal with tapered roller bearings. The pouring valve is made of P.T.F.E. (Teflon) & this makes cleaning easy. Trap is used to very effective stop abrasive filler particles from entering & ruining the vacuum pump.

Our Team

The reason behind the success and growth of our organization is the support of our competent team of experts. These professionals have industry expertise of many years and posses a thorough knowledge in their respective domains. We make sure that the professionals are regularly trained to keep them updated about the market scenario. The team consists of the following:

Technicians
Quality controllers
Research & development associates
Sales & marketing executives

In the manufacture of electrical components and equipments such as Transformers, Switch gear etc. the use of insulating oils, such as Mineral Transformer oil, becomes indispensable. The Dielectrical properties of this oil may vary depending on the content of the Gas, Moisture, Suspended Particles, and other contaminants. Even new oil absorbs gas and moisture while in storage. Prior to its use, therefore, it has to be reconditioned. Reconditioning and purification of the oil is also necessary due to absorption of gas and moisture during service and due to development of ageing products. V.P.I. Mfg. Co. Ltd. manufacturers a variety of plants for the purification and reconditioning of the mineral Transformer oil to relevant specifications. these plants cover the entire range of low, medium , high and extra high voltage equipment such as transformers. The emphasis is always on the user requirements and thus all the plants are tailored to suit the customer specifications. These plants of various design and capacities carry out the following operations:

Sulfur hexafluoride (SF6) is an inorganic, colorless, odorless, non-flammable, extremely potent greenhouse gas which is an excellent electrical insulator. SF6 has an octahedral geometry, consisting of six fluorine atoms attached to a central sulfur atom.

SF6 was discovered by  Henri Moissan and Paul Lebeau in 1901

SF6 is used in the electrical industry as a gaseous dielectric medium for high-voltage circuit breakers, switchgear, and other electrical equipment, often replacing oil filled circuit breakers (OCBs) that can contain harmful PCBs. SF6 gas under pressure is used as an insulator in gas insulated switchgear (GIS) because it has a much higher dielectric strength than air or dry nitrogen. This property makes it possible to significantly reduce the size of electrical gear. This makes GIS more suitable for certain purposes such as indoor placement, as opposed to air-insulated electrical gear, which takes up considerably more room.

Exposure to an arc chemically breaks down SF6 though most of the decomposition products tend to quickly re-form SF6, a process termed "self-healing,”

Dimensions: Vacuum Drying autoclaves up to 15 Mtr length, 6 Mtr width and 6 Mtr height are manufactured. These are structured to withstand the tempreture and vacuum cycles, while maintaining the process requirements. The autoclaves can have horizontal or Vertical Orientation.

Door Operation 
Manual (for smaller sizes), winch driven or Hydraulically Operated door systems are available. Manual as well as hydraulic clamping can be provided. Various safety interlocks can also be provided as required

Optional

Resin saving single or multiple insert vessels with individual filling and level monitoring.
Resin saving bottom piece extension for armature shaft.
Compressed air system to feed oil-free filtered and dried air during pressurization.

Vacuum System

Quality vacuum pumps and accessories.

Filter

Filter on return resin line.

In order to obtain void-free epoxy castings with low partial discharge and good du-electric strength suitable for use at high voltage it is necessary, among other things, to mix the resin & pre-dried filler well, to de-aerate it by vacuum and finally to pour it, also in vacuum.

The mixing chamber with circular cone-shaped bottom is heated with an oil jacket, the temperature being measured and controlled continuously. The temperature of the wall is hence uniform. A stirrer with baffle rotating at the correct speed which gives shearing action causes thorough resin filler mixing. The agitation exposes all the mix to vacuum& thus degassing is thorough. The mixing paddle drive is with 3 phase motor & reduction gear. The shaft seal is robust rotary seal with tapered roller bearings. The pouring valve is made of P.T.F.E. (Teflon) & this makes cleaning easy. Trap is used to very effective stop abrasive filler particles from entering & ruining the vacuum pump.

Rising energy and transmission economy requirements have produced a demand for increasingly larger EHV transformer units capable of meeting the very high operational security standards associated with modern interconnected EHV networks in which the entire energy output is combined.

In addition to appropriate design and material processing methods, efficient drying, degassing and impregnation process technology is a decisive factor to consider. since it is the one on which optimal utilisation of the excellent properties of paper-oil dielectric system depends. Efficient drying of insulation, therefore, is a vital requirement for transformers.

Vacuum Plan & Instruments Mfg. Co. Ltd., since 1965, is the leading manufacturer of various plants for the electric industry in India. Awarded the coveted " Import substitution Award" by the Government of India on numerous occasions, the company has more than 1517 installations of its equipment virtually in every part of the country. The company has an extensive clientele including all the major power corporations, Public sector, Enterprises, Electricity Boards and Large & Small Electrical Manufacturers. The company has successfully executed joint projects with Micafil of Switzerland in India and abroad. Today, the company has a global presence with successful installations in various countries in Asia, Africa, Middle East and Pan Pacific countries.