2.2  Back-up protection functions
GUID-A8D0852F-807F-4442-8730-E44808E194F0 v13
IEC 61850 or
function name
ANSI Function description Line Differential  
      RED650 (A11)
 
Current protection  
 
PHPIOC 50 Instantaneous phase overcurrent protection 1
 
OC4PTOC
51_67
1)
Directional phase overcurrent protection, four steps 1
 
EFPIOC 50N Instantaneous residual overcurrent protection 1
 
EF4PTOC 51N
67N
2)
Directional residual overcurrent protection, four steps 1
 
LCPTTR 26 Thermal overload protection, one time constant, Celsius 1
 
LFPTTR 26 Thermal overload protection, one time constant, Fahrenheit 1
 
CCRBRF 50BF Breaker failure protection 1
 
CCPDSC 52PD Pole discordance protection 1
 
 
Voltage protection
 
 
UV2PTUV 27 Two step undervoltage protection 1
 
OV2PTOV 59 Two step overvoltage protection 1
 
ROV2PTOV 59N Two step residual overvoltage protection 1
 
 
Frequency protection
 
 
SAPTUF 81 Underfrequency protection 1
 
SAPTOF 81 Overfrequency protection 1
 
SAPFRC 81 Rate-of-change of frequency protection 1
 
1) 67 requires voltage
2) 67N requires voltage
2.3  Control and monitoring functions
GUID-E3777F16-0B76-4157-A3BF-0B6B978863DE v15
IEC 61850 or
function name
ANSI Function description Line differential  
      RED650 (A11)  
Control    
SESRSYN 25 Synchrocheck, energizing check and synchronizing 1  
SMBRREC 79 Autorecloser 1  
QCBAY   Bay control 1  
LOCREM   Handling of LR-switch positions 1  
LOCREMCTRL   LHMI control of PSTO 1  
Table continues on next page
Section 2 1MRK 505 394-UEN A
Available functions
42 Line differential protection RED650 2.2 IEC
Technical manual