Back-up protection functions
GUID-A8D0852F-807F-4442-8730-E44808E194F0 v10.1.1
IEC 61850
ANSI
Function description
Generator
REG670
(Customized)
REG670 (A20)
REG670 (B30)
REG670 (C30)
Current protection
PHPIOC
50
Instantaneous phase overcurrent protection
0-4
1
2
2
OC4PTOC
51_67
1)
Four step phase overcurrent protection
0-6
4
4
4
EFPIOC
50N
Instantaneous residual overcurrent protection
0-2
1
2
2
EF4PTOC
51N
67N
2)
Four step residual overcurrent protection
0-6
1
5
5
NS4PTOC
46I2
Four step directional negative phase sequence
overcurrent protection
0-2
1-C41
2-C42
2-C42
SDEPSDE
67N
Sensitive directional residual overcurrent and power
protection
0-2
1-C16
1-C16
1-C16
TRPTTR
49
Thermal overload protection, two time constant
0-3
1
2
3
CCRBRF
50BF
Breaker failure protection
0-4
2
4
4
CCPDSC
52PD
Pole discordance protection
0-4
2
2
2
GUPPDUP
37
Directional underpower protection
0-4
2
4
4
GOPPDOP
32
Directional overpower protection
0-4
2
4
4
NS2PTOC
46I2
Negative sequence time overcurrent protection for
machines
0-2
1
1
1
AEGPVOC
50AE
Accidental energizing protection for synchronous
generator
0-2
1
1
1
VRPVOC
51V
Voltage restrained overcurrent protection
0-3
3-C36
3-C36
3-C36
GSPTTR
49S
Stator overload protection
0-1
1-C37
1-C37
1-C37
GRPTTR
49R
Rotor overload protection
0–1
1-C38
1-C38
1-C38
Voltage protection
UV2PTUV
27
Two step undervoltage protection
0-2
2
2
2
OV2PTOV
59
Two step overvoltage protection
0-2
2
2
2
ROV2PTOV
59N
Two step residual overvoltage protection
0-3
3
3
3
OEXPVPH
24
Overexcitation protection
0-2
1
1
2
VDCPTOV
60
Voltage differential protection
0-2
2
2
2
STEFPHIZ
59THD
100% stator earth fault protection, 3rd harmonic
based
0-1
1-D21
1
1
Frequency protection
SAPTUF
81
Underfrequency protection
0-6
3
6
6
SAPTOF
81
Overfrequency protection
0-6
3
6
6
SAPFRC
81
Rate-of-change frequency protection
0-3
1
3
3
FTAQFVR
81A
Frequency time accumulation protection
0-12
12-E03
12-E03
12-E03
1MRK 502 068-BEN D
Generator protection REG670 2.1 IEC
Product version: 2.1
8
ABB