Impregnated capacitor type AC
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Description
Long experience and extensive R&D ensure high quality capacitors
The HiQ capacitors are available in sizes up to 1200 kvar per unit (at 50 Hz), characterized by negligible losses and high reliability. The capacitors consists of thin dielectric polypropylene film wound together with electrodes of aluminium foils. A bio-degradable hydrocarbon compound with excellent electrical properties is used as the impregnation fluid. The container is of surface-treated high-quality steel and the bushings and terminals are of the highest quality and reliability.Different fuse technologies
HiQ capacitor units are available with Internal or External Fuses or Fuseless.
Fusing
A high voltage capacitor unit is made up of a number of elements, each consisting of very thin layers of dielectric materials and thin foils of aluminium as electrodes. The elements are stacked inside the capacitor container and connected in series and parallel to accommodate the voltage and capacitance rating specified for the whole capacitor unit.
The dielectric materials in modern high voltage capacitors are utilized electrically to their maximum and the operating stress is typically very high compared to other power electric products. The long term aging take place in some "weak spots" that are always present in the dielectric. The dielectric is certainly the most influencing factor for the reliability of the whole capacitor or capacitor bank. However, it is also very much depending on the fuse technology and the unbalance protection arrangements.
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Impregnated capacitor type AC
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