Magnewin Energy Pvt. Ltd
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Water Cooled Capacitors, Medium Frequency, High Frequency Water Cooled Capacitors, Manufacturer, Sangli, India

 
     
 
     
Manufacturing and Quality Control
Imported bi-axially oriented Double hazy Polypropylene film and 99.9% pure aluminum foil are used as dielectric and electrode. Wrinkle free winding of the elements is carried in an Class 100 environment on a Semi Automatic winding machine with edge and end folding of the aluminum foil. This is to eliminate overvoltage stress at the edges of the buried area of the foil.

Each wound element is tested for dry DC Overvoltage with stand for pin holes and adequacy of margins between AI foils. Numbers of elements are interconnected in series - parallel to achieve the desired capacitance and designed voltage rating of the Capacitor.

The dry pack is wrapped with several layers of high quality insulating paper before inserting it into a pre treated / degreased aluminum container and the top lid is welded by semiautomatic Pulsed TIG welding machine.

The aluminum Sheet used for fabricating containers is imported, manufactured of a special alloy with its surface embossed. All metal parts copper and brass are silver brazed to ensure homogeneous joint.

Porcelain bushings of desired BIL are leak proof fitted on the lid as required. The terminals are manufactured from extruded brass and the water cooling pipe is of 99.99% pure electrolytic grade annealed copper and pressure tested for leaks before fitting on the pack. On specific request of client, imported over pressure switches are also fitted on the Capacitors.

All the joints are tightened with torque wrench and are locked to ensure they remain perfectly tight always. The capacitors are then loaded in a PLC controlled autoclave for uniform heating @85°C and drying under vacuum of 0.001 torr for a given period. After confirming the quality of drying by precision online monitoring instruments, the capacitors are then impregnated under vacuum with highly purified and degassed Jarylec C- 1O1. The capacitors are then subjected to all routine tests in accordance to IEC-60110-1.
 
Un (V r.m.s)
Maximum Duration
Observation
1.00
Continuous
Highest average value during any period of capacitor energization.
1.10
8 h in every 24 h
System voltage regulation and fluctuations.
1.15
min in every24 h
System voltage regulation and fluctuations.
1.20
5 min
Voltage rise at light load
1.30
1 min
-
 
Life Expectancy
Based on the state of art plant& machinery, quality of raw materials used, manufacturing under strict quality control and process using precision on line instruments, and elevated over voltage test results under extreme temperatures, capacitors are assured of minimum 20 years life.
 
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Medium Frequency Water Cooled Capacitors | High Frequency Water Cooled Capacitors | Manufacturing and Quality Control | Electrical tests | Low Voltage Shunt Capacitors | Medium Voltage Shunt Capacitors in internal / External Fuse | Medium & High Voltage Surge Capacitors | Energy Storage Capacitor | Pulse Discharge Capacitors | Low Inductance Capacitors | Voltage Dividers up to 1200 KV | Any Special Capacitor in accordance to Client specs
 
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