Section 2 Available Functions; Main Protection Functions; Back-Up Protection Functions - ABB Relion Technical Manual

1MRK 502 048-UUS A
Section 2
2.1
IEC 61850 or ANSI Function description
Function name
Differential protection
T3WPDIF 87T
REFPDIF 87N
HZPDIF 87
GENPDIF 87G
Impedance protection
ZMRPSB 68
ZGCPDIS 21G
LEXPDIS 40
LEPDIS
2.2
IEC 61850 or ANSI
Function name
Current protection
OC4PTOC 51/67
EF4PTOC 51N/67N
SDEPSDE 67N
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Technical manual
Available functions

Main protection functions

Transformer differential protection, three winding
Restricted earth fault protection, low impedance
1Ph High impedance differential protection
Generator differential protection
Power swing detection
Underimpedance protection for generators and transformers
Loss of excitation
Load encroachment

Back-up protection functions

Function description
Four step phase overcurrent protection, 3-phase output
Four step residual overcurrent protection, zero/negative
sequence direction
Sensitive directional residual overcurrent and power protection
Section 2
Available functions
Generator
0–1
0–1
0–1 1
0–1 1
0–1
0–1 1
0–1 1
0–1 1
Generator
0–2 2 2
0–2 2 2
0–1 1 1
1
1
1
1
1
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