CBS-4 RA, Central residual current protection
Unit equivalent to 4 residual current protection relays. 4 independent programmable relays available
4 inputs to connect the external toroidal transformers of the WG / WGS / WGC
Self-reclosing with programmable residual current trip in each channel
Superimmunized Type A relay with high frequency current filtering and high immunity. Monitoring in true root mean square (TRMS)
Reduced size: 3 modules
5 independent programmable outputs:
Backlight display to show the information of the 4 channels:
Trip/external reset input
Automatic test of the connection and status of each external transformer
Optional RS-485 Communications: type CBS-4C RA and CBS-4C RAL
Assembly on DIN rail 46277 (EN-50022)
Optional assembly on 72 x 72 panel with accessory M5ZZF1.
CBS-4 RA or CBS-4 RAL allow an intelligent residual current protection, with greatly reduced dimensions. A contactor is available per channel, enabling the automatic reclosure after a trip, thus offering the most adequate solution for public lighting, cash machines, refrigeration chambers, traffic lights, etc. In addition, version CBS-4 C, with RS-485 communications, is used with the Power Studio software and it adds the centralised supervision in real-time, as well as a record log that can be analysed later on.