GFS INCORPORATED "GFS-100" MODEL 02-0705-01 GROUND FAULT CIRCUIT INTERRUPTER SYSTEM.THIS CONTROLLER IS THE PERFECT PLUG AND PLAY CIRCUIT INTERRUPTER FOR THE FOLLOWING:BUILT IN CONTACTOR IS DESIGNED TO TRIP OPEN WHEN GROUND FAULT CONDITION OCCURS.100 AMPS 3-PHASE OR SINGLE PHASE. (CANNOT DO BOTH AT SAME TIME, INSTALLER MUST CHOOSE)208 - 240 VOLTS OR 420 - 480 VOLTS. (CANNOT DO BOTH AT SAME TIME, INSTALLER MUST CHOOSE)DESIGNED FOR MAXIMUM INSTALL FLEXIBILITY YOU CAN USE THIS FOR EQUIPMENT AND/OR PERSONAL PROTECTION. (UL1053 STANDARD IS FOR EQUIPMENT PROTECTION NOT PERSONNEL)PRESET TO 5mA TRIP LEVEL PER UL943 STANDARD THIS TRIP LEVEL CAN BE SET FROM 2 TO 100 mA HOWEVER SETTING ABOVE 5mA DOES NOT ALLOW THE DEVICE TO BE CONSIDERED PERSONAL PROTECTION.HOW IT WORKS:MONITORS PRIMARY GROUND FAULT LEAKAGEMONITORS PRIMARY GROUND CURRENTMONITORS ELEVATED PRIMARY GROUND VOLTAGEMONITORS ELEVATED EQUIPMENT CASE VOLTAGEMONITORS PRIMARY GROUND CIRCUIT CONTINUITYINSTALLED (BUT OPTIONAL TO USE) SENSE LEAD MONITORING TO CHECK GROUND IN DESIGNATED WORK AREA, AND TO CHECK FOR GROUND CONTINUITY TO BUILDING GROUND OR EARTH GROUND. NOTE: THIS TERMINAL IS BETWEEN THE CDL5 AUX CONTACT BLOCK AND 1/4AMP LITTLEFUSE.INSTALLATION MANUAL INCLUDED WITH DETAILED SETUP INSTRUCTIONS CONTAINED WITHIN.RECOMMEND A QUALIFIED INDUSTRIAL ELECTRICIAN INSTALL THIS DEVICE FOR SAFETY.BOX SHIPPING WEIGHT IS 22 POUNDS.