Schaffner introduces new EMC line filters

Schaffner has announced the availability of an addition to its range, the FN3280H 4-Line filter series, featuring higher insulation resistances. The company says that new arrival is a compact and lightweight filter design with a ‘cubic’ shape that requires minimal mounting space and simplifies the power entry design of enclosures and control panels for machine builders.

The new line-up of FN3280H filters, with the so-called R69 option, will not cause the overall insulation resistance of machinery or equipment under test to drop below 1M, ensuring systems fitted with the new EMC filter will  comply with European and International safety standards.  The filters also increase EMC immunity if connected directly to the mains input.

As a mains input filter for equipment requiring 3-phase power with a neutral line, the FN 3280 is said to provide enough performance to ensure EMC compliance of machinery in mixed (Class A) or even domestic (Class B) environments whilst also increasing the immunity of the entire installation “significantly”. The new filter series is now available with power ratings up to 600A and the line-ground discharge time (after power disconnection) is increased so that standard models may be more suitable for non-machinery applications.

Schaffner affirms that the FN3280 series provides the attenuation performance needed to meet the requirements of various machine tools with up to 12 driving axes and ~10 to 20m of motor cable each. To simplify selection for an application, the filter current ratings are aligned with common fuse values. The attenuation performance is identical to standard models making them interchangeable depending on end product application.

The new filters are stated to offer simple and time-saving installation with good accessibility for automatic and hand tools. Further, Schaffner confirms that its FN3280H filters have solid, touch-safe terminal blocks (8 to 200 A types) offering sufficient contacting cross section according to the EN 60204-1 installation standard, commonly required for industrial applications.

Key specifications include maximum continuous operating voltage 3 x 520/300 Vac, operating frequency DC – 60Hz, rated currents of 8 – 600A and an operational temperature range -25Celsius to 100Celsius. Typical applications include industrial equipment, machinery, machine tools and diverse process automation systems requiring 3-phase and neutral electricity supply. Schaffner concludes by stating that due what it refers to as “ outstanding attenuation performance“, its FN3280 is well suited for noisy power supplies, renewable energy applications and high power office equipment: further, that due to the relatively low leakage current, it may even be used for some medical devices.