Even with the power being lost at the pedestal, your EMS is still saving your a/c by having the 2 1/2 minute delay before it sends power to your rig.
I actually have 2 EMS-PT50C's. One in service and a spare still in the box to use if/when the primary one has to go back for service. I will not plug my rig in to shore power anywhere without one.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof