Siemens 6SE64-2FA00-6AD0-6AD0 EMC Micromaster 4 Filter. Did not work for me. I need an in-line filter between a UK 13A single phase mains socket and a 3-phase Variable Frequency Drive (VFD). The filter kept on blowing my mains cut out which is situated in an out-building and has its own ground earth spike. I am sure the filter is perfectly satisfactory for other applications BUT IT DIDN'T WORK FOR MY APPLICATION, and no one locally knows why.