Network Management Card - Single Phase Symmetra SNMP Trap #77 details
SNMP trap # 77 (abnormalCondition) is reserved for specific UPS failures. When trap #77 is sent, it also has a binded subtrap which gives further detail into the nature of the fault. The subtraps are specific to the UPS family type.
Attached is a breakdown for the Symmetra single phase line of UPS (Symmetra RM, Symmetra LX, Symmetra Power Array), which uses the Network Management Card APP called 'sy'.