Vacuum Impregnation Plants are generally required in Electrical Industry. Impregnation is most important process to improve Insulation Resistance of the electrical components. In turn it improves life of the component and hence impregnation has become compulsory to each and every electrical components. Vacuum impregnating plants designed for impregnation with Varnishes, are generally suitable for coils LT/HT Motors. This is the most important process for electrical insulation.
» Design of vacuum impregnating plants depends upon following aspects :
a) Design, Constructional features, winding details of components to be impregnated.
b) Impregnant to be used.
C) Class of insulation required
d) Operating temperature
e) Surrounding Environment
Above requirements necessiates a very wide range of impregnating plants. We manufacture all types of vacuum impregnating plants, to meet above requirements. These are suitable for all types of Varnishes, Oils, Epoxy resins Wax, Petroleum Jelly etc.
These have following Sailent features :-
1. Unheated impregnating vessel.
2. Impregnant storage tank.
3. Inter-connecting piping, valves.
4. Stoving vessel.
5. Vacuum pumping system.
6. Impregnating vessel pressurising arrangement, with dryer for air/nitrogen.
In order to enable us to design impregnating plants, following information is essential :
• Physical dimensions of charge and No. of components to be impregnated per batch.
• Impregnant system to be used.
• Working vacuum and working pressure for impregnation.
1) Dipping Method.
2) Vacuum Impregnation.
3) Trickle or Rotary Impregnation.
The components having low operating voltages, having less temperature rise, less operating cycles, most stable or havinglow electrical stress and having large coolingarea components, generally come in this type of impregnation.
• Process Plant :
The plant will consist of Dipping or Impregnating Chamber of suitable size and Storage Tank with required accessories such as stirrer arrangement, water chilling system and /or heating system, insulation, additional pressure arrangement for transfer of Impregnant from storage tank to Impregnating Chamber.
This method of Impregnation is most commonly used. Components having low cooling space, high operating temperatures, continuous duty cycle, lower diameters of winding wires, high electrical stress etc. and combination of above factors, generally use this Vacuum Impregnation method.
• Process Plant :
The plant will consist of Vacuum Impregnating Chamber, Vacuum Pumping system, Condenser, and Storage Tank, StChilling system, Heating system, Pressure system for transfer of Impregnant and for additional penetration of impregnant.
This method is generally used for quick production cycle and individual impregnation of components. Generally resins are impregnated with this system and for most components heat is generated by heating individual component.
• Process Plant :
The plant will consist of individual and continuous operating system with arrangement for continuous rotating of individual or group of components or component station. Metering of impregnant, pre heating of component by suitable method such as D.C. resistance heating etc.
