Published: 25 April 2010
Category: Technical articles
It is possible to adapt ABB's RC223 (Type B) residual current device to the different requirements of industrial plant, according to the prospective fault frequencies generated on the load side of the release, as the following PDF documant shows:
ABB's RC223 residual current release, which can be combined with the Tmax T3, T4 four-pole circuit-breakers in the fixed or plug-in version, is the most advanced solution in the whole residual current release family for the company's Tmax range. It can boast conformity with Type B operation, which guarantees sensitivity to residual fault currents with alternating, alternating pulsating and direct current components.
Apart from the signals and settings typical of the 'basic' residual current release, RC223 also allows the selection of the maximum threshold of sensitivity at the residual fault frequency (three steps Fe = 400 – 700 – 1000 Hz).
To see the full PDF document, please click on the download button below (3.82MB file size). Alteratively, go to http://search.abb.com/library/Download.aspx?DocumentID=1SDC007404G0201&LanguageCode=en&DocumentPartId=&Action=Launch