6.6.8 Technical dataTable 65:LFPTTR/LCPTTR (26)technical dataFunction Range or value AccuracyReference current (0-400)% ofIBase ± 1.0% of InReference temperature (0-600) °F, (0 - 300)°C ± 2.0°F, ±2.0°COperate time:2 22 2prefI It ln I It æ ö-ç ÷= × ç ÷-è øEQUATION1356 V2 EN (Equation 20)I = actual measured currentIp = load current before overloadoccursIref = reference load currentTime constant t = (0–1000) minutes IEC 60255-8, ±5% + 200 msAlarm temperature (0-400)°F, (0-200)°C ± 2.0°C± 2.0°FTrip temperature (0--600)°F, (0-300)°C ± 2.0°C± 2.0°FReset level temperature (0-600)°F, (0-300)°C ± 2.0°C± 2.0°F6.7 Breaker failure protection 3-phase activation and outputCCRBRF (50BF)6.7.1 IdentificationFunction description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberBreaker failure protection, 3-phaseactivation and outputCCRBRF3I>BFSYMBOL-U V1 EN50BF6.7.2 FunctionalityCCRBRF (50BF) can be current based, contact based, or an adaptive combination of thesetwo conditions.Section 6 1MRK 511 287-UUS ACurrent protection136Technical manual
