As a global leader in power capacitors, EPCOS offers a wide range of medium voltage (MV) capacitor for various applications.

Technology

MV power capacitors are produced in film technology where two metal foil electrodes are separated by a sheet of a plastic film. The electrodes are made of aluminium foil. The most widely used plastic film is polypropylene and hence film capacitors are also known as all polypropylene (APP) capacitors. Film capacitors in general are characterized by high insulation resistance, good capacitance stability, low losses even at high frequencies, high pulse current and high harmonic current capabilities.

Design

Reliability is built into the capacitors right from the design stage. Time-tested design rules assure the exceptional quality of the capacitors. A multilayer design ensures that a weak spot in any film will not result in an instant failure. Further, each element is tested to remove weak elements at the initial stage. Only healthy elements are processed further. To reduce the effect of stress concentration at the electrode edge, a corona ring is provided by continuous edge folding of the aluminium foil along the length. This eliminates sharp edges caused during mechanical slitting.