Zez Silko, s.r.o.

DC link (filtering) capacitors

Application

These capacitors are for use on AC/DC power converters and inverters. Usually they can be found in traction drives, wind power converters and solar inverters as DC link (buffers) and/or filter capacitors (ripple filtering). Typically electrolytic capacitors are being replaced by these PP film capacitors.

The main advantages against electrolytic ones are:

- high ripple voltage

- high current

- high reliability

Construction

The self-healing, dry-type, capacitor elements are produced using specially profiled, wave cut metallised PP film which ensures low self-inductance, high rupture resistance and high reliability. These elements are enclosed in a cylindrical Al case, cylindrical plastic case or rectangular stainless steel/aluminium case which is filled with vegetable oil based, non-toxic, biodegradable, environment friendly, solid matter. Overpressure disconnection is not considered necessary. The capacitor top is sealed with self-extinguishing PU resin UL - 94 VO. Special design ensures very low self inductance.

Installation instruction

Capacitor life will be shortened by excess temperatures. Capacitors can be mounted in any position. Detail electrical and mechanical features can be found in the relevanty datasheets.