IEC 61850 or Function
name
ANSI Function description
EFPIOC 50N Instantaneous residual overcurrent protection
EF4PTOC 51N/67N Four step residual overcurrent protection, zero/negative sequence direction
SDEPSDE 67N Sensitive directional residual overcurrent and power protection
UC2PTUC 37 Time-delayed two-step undercurrent protection
LCPTTR 26 Thermal overload protection, one time constant, Celsius
LFPTTR 26 Thermal overload protection, one time constant, Fahrenheit
TRPTTR 49 Thermal overload protection, two time constants
CCRBRF 50BF Breaker failure protection, 3-phase activation and output
CSPRBRF 50BF Breaker failure protection, phase segregated activation and output
STBPTOC 50STB Stub protection
CCRPLD 52PD Pole discordance protection
BRCPTOC 46 Broken conductor check
GUPPDUP 37 Directional Under-power protection
GOPPDOP 32 Directional Over-power protection
DNSPTOC 46 Negative sequence based overcurrent function
AEGGAPC 50AE Accidental energizing protection for synchronous generator
NS2PTOC 46I2 Negative-sequence time overcurrent protection for machines
VRPVOC 51V Voltage-restrained time overcurrent protection
Voltage protection
UV2PTUV 27 Two-step undervoltage protection
OV2PTOV 59 Two-step overvoltage protection
ROV2PTOV 59N Two-step residual overvoltage protection
OEXPVPH 24 Overexcitation protection
LOVPTUV 27 Loss-of-voltage check
STEFPHIZ 59THD 100% Stator earth fault protection, 3rd harmonic based
Frequency protection
SAPTUF 81 Underfrequency function
SAPTOF 81 Overfrequency function
SAPFRC 81 Rate-of-change frequency protection
Table 3: Control and monitoring functions
IEC 61850 or Function
name
ANSI Function description
Control
SESRSYN 25 Synchrocheck, energizing check and synchronizing
SMBRREC 79 Autorecloser for 3-phase operation
STBRREC 79 Autorecloser for 1/3-phase operation
TR8ATCC 90 Automatic voltage control for tap changer, parallel control
TCMYLTC 84 Tap changer control and supervision, 6 binary inputs
Table continues on next page
Section 1 1MRK 511 284-UEN A
Introduction
10 650 series
Engineering manual
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