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Back-up protection functions
GUID-A8D0852F-807F-4442-8730-E44808E194F0 v10.1.1
IEC 61850
ANSI
Function description
Transformer
RET670
(Customized)
RET670 (A10)
RET670 (A30)
RET670 (B30)
RET670 (A40)
RET670 (B40)
RET670 (A25)
Current protection
PHPIOC
50
Instantaneous phase
overcurrent protection
0-8
3
2
2
3
3
2-C19
OC4PTOC
51_67
1)
Four step phase overcurrent
protection
0-8
3
2
2
3
3
2-C19
EFPIOC
50N
Instantaneous residual
overcurrent protection
0-8
3
2
2
3
3
2-C19
EF4PTOC
51N
67N
2)
Four step residual
overcurrent protection
0-8
3
2
2
3
3
2-C19
NS4PTOC
46I2
Four step directional
negative phase sequence
overcurrent protection
0-8
2-C42
2-C42
2-C42
3-C43
3-C43
2-C19
SDEPSDE
67N
Sensitive directional residual
overcurrent and power
protection
0-3
1
1-C16
1-C16
1-C16
1-C16
1-C16
LCPTTR
26
Thermal overload protection,
one time constant, Celsius
0–2
LFPTTR
26
Thermal overload protection,
one time constant,
Fahrenheit
0–2
TRPTTR
49
Thermal overload protection,
two time constant
0-6
1
1B
1-C05
1B
1-C05
2B
1-C05
2B
1-C05
CCRBRF
50BF
Breaker failure protection
0-6
3
2
4
3
6
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
1
1
CBPGAPC
Capacitor bank protection
0-6
NS2PTOC
46I2
Negative sequence time
overcurrent protection for
machines
0-2
VRPVOC
51V
Voltage restrained
overcurrent protection
0-3
Voltage protection
UV2PTUV
27
Two step undervoltage
protection
0-3
1-D01
1B
1-D01
1B
1-D01
1B
2-D02
1B
2-D02
2-D02
OV2PTOV
59
Two step overvoltage
protection
0-3
1-D01
1B
1-D01
1B
1-D01
1B
1-D02
1B
1-D02
2-D02
1MRK 504 155-BEN F
Transformer protection RET670 2.1 IEC
14
ABB