Surge Protection Panel Extension. 100kA, 240 Volts, 2G Configuration - 2-Phase, Grounded, Split-Phase. MST Enclosure - Metal, Surface Mount, Top Feed. M2 Monitoring - LED/Phase plus Audible Alarm, Dry Relay Contacts plus Surge Counter. Filter, Optional Feature 7 - Liebert/Cutler Hammer/Eaton/Siemens