2011-10-27 > LHC ***************************** Statistical leakage current measurements realized on 300 converters installed in LHC Load is considered a very high impedance, and then leakage current represents the converter side. 2011-10-27 > A7 ***************************** Was verified in Hall 287 test hall, applying 10V common mode to the ouput busbars, crowbar being disconnected, with 4.3mA of measured earth current. 2011-10-27 > On schematics ***************************** Earth leakage currents came mainly from - 4QLS gate driver-pos (control card > Power Card: MOSFET+) 15kOhms-eq - 4QLS gate driver-neg (control card > Power Card: MOSFET-) 15kOhms-eq - VE+ differential measurement (Power Card > control card) 11kOhms-eq - VE- differential measurement (Power Card > control card) 11kOhms-eq - Vout differential measurement (Power Card > control card) 11kOhms-eq All together leads to: 2.5kOhms output to ground (10V > 4 mA)