Power Electronics / Power Management


Premium aluminium PFC capacitors

20 October 2004 Power Electronics / Power Management

PhaseCap capacitors in cylindrical aluminium cases have been designed for power factor correction. Since loads like motors and transformers consume active power as well as reactive power, generators, supply cables and other electrical distribution equipment needs to be relieved of the reactive power.

Epcos' compact PhaseCap Premium PFC capacitors of the MKK AC series (>5,0 to 33,8 kVar) is intended to increase packing density per bank and cut component costs. Improved thermal response and simplified installation are advantages of the cylindrical aluminium case. Electrical features of the PhaseCap are long life expectancy, corona-free, and high pulse current withstand capability (up to 200 x IR).

The compact PhaseCap capacitor is a self-healing, metallised polypropylene film capacitor. The current carrying metal layer (electrode) is vapour-deposited onto one side of the film. Three electrically-separated capacitor elements are wound concentrically in a single operation onto an insulated metal core tube, which guarantees superior winding precision. The electrodes are connected by metal spraying the face ends of the winding elements. The capacitor elements are star, delta or series connected.

The compact MKK winding elements are housed in a cylindrical aluminium case and hermetically sealed by a press-rolled metal lid, while the capacitor also has a triple safety system.



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