Metal film capacitors

Thursday, 13 January, 2005 | Supplied by:

Metallised polypropylene film capacitors are at no risks from leakage. The cases are metallic, the covers are in self-extinguishing plastic (Class V2 to UL-94 standards) and an edging of the case on the cover seals the capacitor, ensuring airtight closure.

An insulating container between the capacitive element and the metal case, combined with the blocking of the capacitive element in resin, makes the capacitor safe both electrically and from vibration.

The series 16.25/. 26/. 27/. 33 devices are equipped with a safety feature in accordance with VDE 0560-8/A1 and UL 810 standard.

When the capacitor is installed, a clearance of at least 10 mm must be left above the terminals. This protection is provided by a special construction feature that breaks both the connections in case of breakdown, without affecting case insulation, preventing the capacitor from exploding or burning.

In case of permanent short-circuit; the current causes the dielectric to decompose, forming gas - the resulting pressure pushes up the part of the lid where the terminals are mounted, thus breaking the internal connections and stopping the current flow.

The device is designed in different sizes for each size of capacitor and can handle current up to 10,000 A.

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