Back-up protection functions
IEC 61850
ANSI
Function description
Line Differential
RED670
(Customized)
RED670 (A31)
RED670 (B31)
RED670 (A32)
RED670 (B32)
Current protection
PHPIOC
50
Instantaneous phase overcurrent
protection
0-3
1
1
1
1
OC4PTOC
51_67
1)
Four step phase overcurrent protection
0-3
1
1
1
1
EFPIOC
50N
Instantaneous residual overcurrent
protection
0-1
1-C24
1-C24
1-C24
1-C24
EF4PTOC
51N
67N
2)
Four step residual overcurrent protection
0-3
1-C24
1-C24
1-C24
1-C24
NS4PTOC
46I2
Four step directional negative phase
sequence overcurrent protection
0-2
1-C24
1-C24
1-C24
1-C24
SDEPSDE
67N
Sensitive directional residual overcurrent
and power protection
0-1
1-C16
1-C16
1-C16
1-C16
LCPTTR
26
Thermal overload protection, one time
constant, Celsius
0–2
1
1
1
1
LFPTTR
26
Thermal overload protection, one time
constant, Fahrenheit
0–2
1
1
1
1
CCRBRF
50BF
Breaker failure protection
0-2
1
2
1
2
STBPTOC
50STB
Stub protection
0-2
1-B11
1B
1-B11
1-B11
1B
1-B11
CCPDSC
52PD
Pole discordance protection
0-2
1
2
1
2
GUPPDUP
37
Directional underpower protection
0-2
1-C17
1-C17
1-C17
1-C17
GOPPDOP
32
Directional overpower protection
0-2
1-C17
1-C17
1-C17
1-C17
BRCPTOC
46
Broken conductor check
1
1
1
1
1
VRPVOC
51V
Voltage restrained overcurrent protection
0-3
Voltage protection
UV2PTUV
27
Two step undervoltage protection
0-2
1
1
1
1
OV2PTOV
59
Two step overvoltage protection
0-2
1
1
1
1
OEXPVPH
24
Overexcitation protection
0-1
1-D03
1-D03
1-D03
1-D03
VDCPTOV
60
Voltage differential protection
0-2
2
2
2
2
LOVPTUV
27
Loss of voltage check
1
1
1
1
1
PAPGAPC
27
Radial feeder protection
0–1
Frequency protection
SAPTUF
81
Underfrequency protection
0-6
2-E02
2-E02
2-E02
2-E02
SAPTOF
81
Overfrequency protection
0-6
2-E02
2-E02
2-E02
2-E02
SAPFRC
81
Rate-of-change frequency protection
0-2
2-E02
2-E02
2-E02
2-E02
1MRK 505 346-BEN -
Line differential protection RED670 2.1 IEC
Product version: 2.1
12
ABB