
IEC 61850 or Function
name
ANSI
Function description
FDPSPDIS
21
Phase selection with load enchroachment, quadrilateral characteristic
FMPSPDIS
21
Faulty phase identification with load enchroachment for mho
ZDNRDIR
21D
Directional impedance quadrilateral and mho
PPLPHIZ
Phase preference logic
ZMRPSB
68
Power swing detection
ZCVPSOF
Automatic switch onto fault logic, voltage-and current-based
ZGCPDIS
21G
Underimpedance protection for generators and transformers
LEXPDIS
40
Loss of excitation
OOSPPAM
78
Out-of-step protection
LEPDIS
Load enchroachment
Table 2:
Backup protection functions
IEC 61850 or Function
name
ANSI
Function description
Current protection
PHPIOC
50
Instantaneous phase overcurrent protection, 3-phase output
SPTPIOC
50
Instantaneous phase overcurrent protection, phase segregated output
OC4PTOC
51/67
Four-step phase overcurrent protection, 3-phase output
OC4SPTOC
51/67
Four-step phase overcurrent protection, phase segregated output
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
Table continues on next page
1MRK 511 284-UEN B
Section 1
Introduction
650 series
7
Engineering manual
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