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Amplifiers/Converters??

Vishay PFC capacitors have 265mm profile

Posted: 27 May 2002 ?? ?Print Version ?Bookmark and Share

Keywords:estaprop? esta dry? tubular capacitor? metallized film capacitor? polypropylene capacitor?

Vishay Intertechnology Inc. has announced the release of a series of single-phase and 3-phase power factor correction (PFC) capacitors in tubular aluminum casings. The capacitors have a maximum height of 265mm20 percent less than traditional modelsand diameters ranging from 64mm to 84mm.

The ESTAprop oil-impregnated capacitor and ESTAdry dry dielectric capacitor rely on low-loss, self-healing metallized polypropylene film technology to provide PFC to low-voltage electric utility and industrial applications, including motors and transformers.

The company claims that the devices' diameters and stacked assembly of the inner winding elements provide exceptional heat dissipation for reduction of internal temperature and increased life expectancy. The ESTAprop and ESTAdry feature winding elements that share the same heat transfer characteristics and solder connection space.

In a delta connection up to 690V, neighboring winding elements also share the same voltage level, reducing the risk of device breakdown between phases.

The capacitors are available in rated voltages ranging from 2305V to 690V, with outputs up to 30kVar at 50c/s, depending on the voltage rating. Additional kVar values are available in voltage ratings ranging from 230V to 1kV.

Designed in accordance with IEC 60831-1+2, EN 60831-1+2, and VDE 0560-46+47 specifications, the ESTAprop and ESTAdry feature overvoltage values ranging from Ucn + 10 percent (up to 8h daily) to Ucn + 30 percent (up to 1min).

The standard ESTAprop capacitor is has a biodegradable, natural oilwith a fire point>3000Cunder vacuum and hermetically-sealed construction.

Both capacitors are housed in a deep-drawn aluminum container with a metal lid press-rolled onto it. A threaded stud (M12) at the bottom of the container serves for both grounding and mounting. Current is supplied via screw-on (M5) terminal in the 84mm(x) capacitor, or double push-on terminal in the 64mm(x) capacitor.





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