
Section 2
Available functions
Note that not all functions included in the tables below have
commissioning information available.
2.1
Main protection functions
IEC 61850/
Function block
name
ANSI
Function description
Transformer
RET650 (A01) 2W/1CB
RET650 (A05) 3W/1CB
RET650 (A07) OLTC
Differential protection
T2WPDIF
87T
Transformer differential protection, two winding
1
T3WPDIF
87T
Transformer differential protection, three winding
1
REFPDIF
87N
Restricted earth fault protection, low impedance
2
3
HZPDIF
87
1Ph High impedance differential protection
2
2
2.2
Back-up protection functions
IEC 61850/
Function block
name
ANSI
Function description
Transformer
RET650
(A01)
2W/1CB
RET650
(A05)
3W/1CB
RET650
(A07)
OLTC
Current protection
PHPIOC
50
Instantaneous phase overcurrent protection
2
3
OC4PTOC
51/67
Four step directional phase overcurrent protection
2
3
2
EFPIOC
50N
Instantaneous residual overcurrent protection
2
3
EF4PTOC
51N/67N
Four step directional residual overcurrent protection
2
3
2
TRPTTR
49
Thermal overload protection, two time constants
2
3
2
CCRBRF
50BF
Breaker failure protection
2
3
CCRPLD
52PD
Pole discordance protection
2
3
Table continues on next page
1MRK 504 126-UEN -
Section 2
Available functions
13
Commissioning Manual