Section 2
Available functions
2.1
Main protection functions
IEC 61850 or
Function name
ANSI
Function description
Generator
REG650
REG650 (B01
)
Gen diff
REG650 (B05
)
Gen+Trafo diff
Differential protection
T3WPDIF
87T
Transformer differential protection, three winding
0–1
1
REFPDIF
87N
Restricted earth fault protection, low impedance
0–1
HZPDIF
87
1Ph High impedance differential protection
0–1
1
1
GENPDIF
87G
Generator differential protection
0–1
1
Impedance protection
ZMRPSB
68
Power swing detection
0–1
ZGCPDIS
21G
Underimpedance protection for generators and transformers
0–1
1
1
LEXPDIS
40
Loss of excitation
0–1
1
1
LEPDIS
Load encroachment
0–1
1
1
2.2
Back-up protection functions
IEC 61850 or
Function name
ANSI
Function description
Generator
REG650
REG650 (B01) Gen diff
REG650 (B05) Gen+Trafo diff
Current protection
OC4PTOC
51/67
Four step phase overcurrent protection, 3-phase output
0–2
2
2
EF4PTOC
51N/67N
Four step residual overcurrent protection, zero/negative
sequence direction
0–2
2
2
SDEPSDE
67N
Sensitive directional residual overcurrent and power
protection
0–1
1
1
TRPTTR
49
Thermal overload protection, two time constants
0–2
2
2
CCRBRF
50BF
Breaker failure protection, 3–phase activation and output
0–1
1
1
CCRPLD
52PD
Pole discordance protection
0–1
1
1
Table continues on next page
1MRK 502 048-UEN A
Section 2
Available functions
37
Technical manual
Summary of Contents for REG650 ANSI
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