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IEC 61850 / Function block
name
ANSI
Function description
ZMOPDIS
21
Five-zone distance protection, mho characteristic
FMPSPDIS
21
Faulty phase identification with load enchroachment for mho
ZDNRDIR
21
Directional impedance quadrilateral and mho
PPLPHIZ
Phase preference logic
ZMRPSB
68
Power swing detection
ZCVPSOF
Automatic switch onto fault logic, voltage-and current-based
ZGPDIS
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 / Function
block name
ANSI
Function description
Current protection
PHPIOC
50
Instantaneous phase overcurrent protection
SPTPIOC
50
Instantaneous phase overcurrent protection
OC4PTOC
51/67
Four-step phase overcurrent protection
OC4SPTOC
51/67
Four-step phase overcurrent protection
EFPIOC
50N
Instantaneous residual overcurrent protection
EF4PTOC
51N/67N
Four-step directional residual overcurrent protection
SDEPSDE
67N
Sensitive directional residual overcurrent and power protection
UC2PTUC
37
Time-delayed two-step undercurrent protection
LPTTR
26
Thermal overload protection, one time constant
TRPTTR
49
Thermal overload protection, two time constants
CCRBRF
50BF
Breaker failure protection
CSPRBRF
50BF
Breaker failure protection
STBPTOC
50STB
Stub protection
CCRPLD
52PD
Pole discordance protection
BRCPTOC
46
Broken conductor check
GUPPDUP
37
Directional underpower protection
GOPPDOP
32
Directional overpower protection
DNSPTOC
46
Negative sequence-based overcurrent function
AEGGAPC
50AE
Accidental energizing protection for synchronous generator
Table continues on next page
1MRK 511 245-UUS -
Section 1
Introduction
650 series ANSI
11
Engineering Manual