Two warning pickup levels are available. This enables actions in the power system tobe done before dangerous temperatures are reached. If the temperature continues toincrease to the trip value, the protection initiates a trip of the protected transformer/generator.8.4.3 Function blockANSI08000037-1-en.vsdTRPTTR (49)I3P*BLOCKCOOLINGRESETTRIPPICKUPALARM1ALARM2LOCKOUTWARNINGANSI08000037 V1 ENFigure 96: TRPTTR (49) function block8.4.4 SignalsTRPTTR is not provided with external temperature sensor in firstrelease of 650 series. The only input that influences the temperaturemeasurement is the binary input COOLING.Table 85:TRPTTR (49) Input signalsName Type Default DescriptionI3P GROUPSIGNAL- Three phase group signal for current inputBLOCK BOOLEAN 0 Block of functionCOOLING BOOLEAN 0 Cooling input changes IBase setting and time constantRESET BOOLEAN 0 Reset of functionTable 86:TRPTTR (49) Output signalsName Type DescriptionTRIP BOOLEAN Trip SignalPICKUP BOOLEAN Pickup signalALARM1 BOOLEAN First level alarm signalALARM2 BOOLEAN Second level alarm signalLOCKOUT BOOLEAN Lockout signalWARNING BOOLEAN Trip within set warning timeSection 8 1MRK 502 043-UUS BCurrent protection208Technical Manual
