IEC 61850 orfunction nameANSI Function description Line DifferentialRED650 (A11)Differential protectionLT3CPDIF 87LT Line differential protection for 3 CT sets, 2-3 line ends, in-zone transformer 1LDLPSCH 87L Line differential protection logic 1Impedance protectionZMFPDIS 21 Distance protection, quad and mho characteristic 1ZMRPSB 68 Power swing detection 1PSLPSCH Power swing logic 1ZCVPSOF Automatic switch onto fault logic, voltage and current based 12.3 Back-up protection functions GUID-A8D0852F-807F-4442-8730-E44808E194F0 v13IEC 61850 orfunction nameANSI Function description Line DifferentialRED650 (A11)Current protectionPHPIOC 50 Instantaneous phase overcurrent protection 1OC4PTOC 51_671) Directional phase overcurrent protection, four steps 1EFPIOC 50N Instantaneous residual overcurrent protection 1EF4PTOC 51N67N2)Directional residual overcurrent protection, four steps 1LCPTTR 26 Thermal overload protection, one time constant, Celsius 1LFPTTR 26 Thermal overload protection, one time constant, Fahrenheit 1CCRBRF 50BF Breaker failure protection 1CCPDSC 52PD Pole discordance protection 1Voltage protectionUV2PTUV 27 Two step undervoltage protection 1OV2PTOV 59 Two step overvoltage protection 1ROV2PTOV 59N Two step residual overvoltage protection 1Frequency protectionTable continues on next page1MRK 505 393-UEN B Section 2ApplicationLine differential protection RED650 2.2 IEC 29Application manual
