IEC 61850 or
Function name
ANSI Function description Line Distance
REL650
REL650 (A01A)
3Ph/1CB
REL650 (A11A)
1Ph/1CB
REL650 (B01A)
3Ph/2CB
EF4PTOC 51N/67N Four step residual overcurrent protection, zero/
negative sequence direction
0–1 1 1 1
SDEPSDE 67N Sensitive directional residual overcurrent and power
protection
0–1 1 1 1
UC2PTUC 37 Time delayed 2-step undercurrent protection 0–1 1 1 1
LCPTTR 26 Thermal overload protection, one time constant,
Celsius
0–1 1 1 1
LFPTTR 26 Thermal overload protection, one time constant,
Fahrenheit
0–1 1 1 1
CCRBRF 50BF Breaker failure protection, 3–phase activation and
output
0–2 1 2
CSPRBRF 50BF Breaker failure protection, phase segregated
activation and output
0–1 1
STBPTOC 50STB Stub protection 0–1 1 1 1
CCRPLD 52PD Pole discordance protection 0–2 1 1 2
BRCPTOC 46 Broken conductor check 0–1 1 1 1
GUPPDUP 37 Directional underpower protection 0–1 1 1 1
GOPPDOP 32 Directional overpower protection 0–1 1 1 1
DNSPTOC 46 Negative sequence based overcurrent function 0–1 1 1 1
Voltage protection
UV2PTUV 27 Two step undervoltage protection 0–1 1 1 1
OV2PTOV 59 Two step overvoltage protection 0–1 1 1 1
ROV2PTOV 59N Two step residual overvoltage protection 0–1 1 1 1
LOVPTUV 27 Loss of voltage check 0–1 1 1 1
Frequency protection
SAPTUF 81 Underfrequency function 0–2 2 2 2
SAPTOF 81 Overfrequency function 0–2 2 2 2
SAPFRC 81 Rate-of-change frequency protection 0–2 2 2 2
1MRK 506 334-UUS A Section 2
Application
31
Application manual