Electrical Equipment Supplies

The next important process is Vacuum drying and impregnation of capacitors. The Container assembled winding packs are loaded in impregnation chamber. When they are dried under elevated temp.and vacuum, then impregnating fluid is filtered taken through vacuum dehydrating and degassing processes before it passes, still under vacuum to the impregnation chamber. After impregnation the capacitors are left for soaking for a specific period. Then capacitors are unloaded. This impregnation process is the heart of capacitor manufacturing.

The extended portion of the elements is soldered with special soldering material by special type of gas flame gun on both sides of pack of specific width. The connection terminals, discharge resistors plate fitting, paper insulation wrapping is done. The insulation level shall be strictly observed while wrapping to avoid terminal to body breakdown. This dry pack is tested for DC voltage. Its capacitance value is measured to confirm the design requirement. This pack is housed in sheet steel container fitted with leads upon which are mounted in two porcelain bushings. The small hole is kept open on top plate for pre drying and impregnation.

Power Capacitor Contains several elements which are wound by winding two layers of aluminium foil interleaved by many layers of PP film having extended foil construction. The aluminium foil winding is Edge folded throughout the length of winding and also end folding at the beginning and end of the winding. The ideal manufacturing condition involve the use of temperature Control & filtered Air Conditioning system in which environment of winding is free from dust ,moisture etc.

SHARDA surge protection capacitors are of special type capacitors. Its application is of specialized nature i.e. in case of abnormal condition. These capacitors are designed for protection of large rotating machines such as motors & generators. At the time of over voltage during electric storms produces surges to electrical equipment’s connected to system. The voltage stress between turns of multi turn coil sets a limitation and surge voltage causes breakdown of turn to turn insulation resulting in short circuited turns.

The surge capacitors restrict the applied surge to a point remote from the point of connection to the equipment to the system.

For increasing Electrical supply system efficiency of distribution, transmission, Substation &on line Feeders also reducing cost of electricity.Coal field, mines, water work systems, Power generation Company etc.

For increasing Electrical supply system efficiency of distribution, transmission, Substation & on line Feeders also reducing cost of electricity. Coal field, mines, water work systems, Power generation Company etc.