A 3-phase separator is a safety device, which fulfils the basic function of a manual emergency off" switch for all 3 phases at once. Such a device should already be installed at the location where you intend to use the LD6230. This is a necessity for compliance with the electrical safety standard IEC61010 - 1:2001. Due to the risk of electric shock or fire we insist that the installation of the LD6230 is performed by a licenced electrician.