8.5.8 Technical dataM12352-1 v14Table 100:LCPTTR/LFPTTR technical dataFunction Range or value AccuracyReference current (2-400)% of IBase ±1.0% of IrReference temperature (0-300)°C, (0 - 600)°F ±1.0°C, ±2.0°FOperate time:2 22 2 2ln pTrip Ambp refrefI It T TI I ITt -= -- - ×é ùê úê úê úê úë ûEQUATION13000039 V2 EN-US (Equation 34)TTrip= set operate temperatureTAmb = ambient temperatureTref = temperature rise above ambient at IrefIref = reference load currentI = actual measured currentIp = load current before overload occursTime constant t = (1–1000)minutesIEC 60255-149,±5.0% or ±200ms whichever isgreaterAlarm temperature (0-200)°C, (0-400)°F ±2.0°C, ±4.0°FOperate temperature (0-300)°C, (0-600)°F ±2.0°C, ±4.0°FReset level temperature (0-300)°C, (0-600)°F ±2.0°C, ±4.0°F8.6 Breaker failure protection CCRBRF IP14514-1 v68.6.1 IdentificationM14878-1 v5Function description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberBreaker failure protection, 3-phaseactivation and outputCCRBRF3I>BFSYMBOL-U V1 EN-US50BF8.6.2 Functionality M11550-6 v17Breaker failure protection (CCRBRF) ensures a fast backup tripping of thesurrounding breakers in case the own breaker fails to open. CCRBRF can becurrent-based, contact-based or an adaptive combination of these two conditions.Section 8 1MRK 505 394-UEN ACurrent protection212 Line differential protection RED650 2.2 IECTechnical manual
