High Voltage Capacitor

Sharda is producing power compensation capacitors since 20 years

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Surge Absorbing / Protective Capacitor

surge protection capacitors are of special type capacitors. Its application is of specialized nature i.e. in case of abnormal condition.

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Low Voltage Panel Mounted APP Capacitor

Low Voltage i.e. up to 650volt, are from 5KVAr to 50KVAr in single units and for further range in banking system as per customer requirement

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High & Low Voltage Capacitor Panel

For optimum utilization of available power the reactive power consumption should be reduced or nullified i.e. power factor should be unity

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Metalised Poly Propolin Capacitor

To overcome this problem the new technique is employed i.e. To use Metallized Polypropylene Film instead of AllPolypropylene Film

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Condenser

We Manufacturers Condenser, Running Condenser, Starting Condenser

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High Voltage Capacitors, Low Voltage MPP Cylindrical Capacitors, Low Voltage MPP Oil Filled Capacitors, Agriculture Capacitors, Manufacturer, India

Manufacturing Facilities
 
A) Winding :
Power Capacitor Contains several elements which are wound by winding two layers of aluminum foil interleaved by many layers of PP film with extended foil construction. The aluminum foil winding is Edge folded throughout the length of winding and also ends folding at the beginning and end of the winding. The ideal manufacturing conditions involve the use of temperature Control & filtered Air Conditioning system in which the Environment of winding is free from dust, moisture etc.
 
B) Element Testing :
The winding elements are individually inspected and tested before being sent in batches to the processing area. Dry element testing is necessary to confirm the voltage withstand capacity, design parameters and clear the weak spots across the dielectric
 
C) Element Pack assembly:
The numbers of elements are packed together as per designed in series / parallel groups that are separated by insulating paper. This pack is pressed on pressing machine under desired pressure and firmly held by insulating Strips.
 
D) Soldering, Connection, Wrapping :
The extended portions of the elements are soldered with special soldering material by a special type of gas flame gun on either side 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 then measured to confirm to the design requirements. 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 predrying and impregnation.
 
E) Impregnation:
The next important process is Vacuum drying and impregnation of capacitors. The can assembled winding packs are kept in the impregnation chamber. When they are dried under the elevated temperature and vacuum, then impregnating fluid is filtered through vacuum dehydrating and degassing processes before it passes, still under vacuum to the impregnation chamber. After impregnation the capacitors are left for socking for a specific period. This impregnation process is the heart of capacitor manufacturing.
 
F) Electrical Testing:
 
After completing the impregnation processes each & every capacitor is tested for a leakage check at elevated temperature in the chamber after which capacitor are electrically tested as per the IS: 13925 for Routine Test & Type Test to ensure the design data, winding material impregnating fluid insulating level etc. The Routine & Type Test for HT capacitors are conducted as per the IS: 13925 which are as listed below:
 

I) Routine tests :
a. Measurement Of Capacitance.
b. Capacitor loss tangent (tan δ) measurement.
c. Voltage test between terminals
d. A.C. Voltage test between terminals & container.
e. Test of discharge device
f. Sealing test.

II) Type tests :
a. Thermal stability test.
b. Capacitor loss tangent (tan δ) measurement at elevated temp.
c. A.C. Voltage test between terminals & container.
d. Lighting impulse voltage test between terminal & container.
e. Short Circuit discharge test.

G) Painting

The capacitors that successfully pass through the final electrical testing and Quality Control parameters are then painted with a special primer and then epoxy painting.

After completing these processes and finishing with accessories such as Name plate, Nut Bolts, the Capacitors will be ready for dispatch.