19-08-2019, 11:51 AM
Terry, that patent is for an ordinary current operated ELCB or RCD are they are now known. An RCBO includes both an RCD and a MCB so it can protect against overcurrent and earth leakage. https://www.consumerunitworld.co.uk/what...-330-c.asp
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv