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1MRK 504 165-UEN Rev. K
3.2
Back-up protection functions
IEC 61850 or
ANSI
function name
Current protection
PHPIOC
50
OC4PTOC
1)
51_67
EFPIOC
50N
EF4PTOC
51N_67N
NS4PTOC
46I2
SDEPSDE
67N
LCPTTR
26
LFPTTR
26
TRPTTR
49
CCRBRF
50BF
STBPTOC
50STB
CCPDSC
52PD
GUPPDUP
37
GOPPDOP
32
BRCPTOC
46
CBPGAPC
NS2PTOC
46I2
VRPVOC
51V
APPTEF
67NT
Table continues on next page
Transformer protection RET670
Commissioning manual
Function description
Instantaneous phase
overcurrent protection
Directional phase
overcurrent protection,
four steps
Instantaneous residual
overcurrent protection
Directional residual
2)
overcurrent protection,
four steps
Directional negative
phase sequence
overcurrent protection,
four steps
Sensitive directional
residual overcurrent and
power protection
Thermal overload
protection, one time
constant, Celsius
Thermal overload
protection, one time
constant, Fahrenheit
Thermal overload
protection, two time
constants
Breaker failure protection
Stub protection
Pole discordance
protection
Directional underpower
protection
Directional overpower
protection
Broken conductor check
Capacitor bank protection
Negative sequence time
overcurrent protection for
machines, two steps
Voltage restrained
overcurrent protection
Average power transient
earth fault protection
© 2017 - 2022 Hitachi Energy. All rights reserved
RET670
(Customized)
0-8
3
0-8
3
0-8
3
0-8
3
0-8
2-C42
0-3
1
0-2
0-2
0-6
1
0-6
3
0-3
3-B26
0-6
3
0-2
1-C35
0-2
1-C35
1
1
0-6
0-2
0-3
1-C35
0-2
1-C54
Available functions
GUID-06D023C0-3F72-4D89-A0A5-F4B452234B7B v1
Transformer
2
3
2
3
2
3
3
3
2-C42
3-C43
1-C16
1-C16
1B
2B
1-C05
1-C05
4
6
3-B26
3-B26
4
6
1-C35
1-C35
1-C35
1-C35
1
1
1-C35
1-C35
1-C54
1-C54
Section 3
2-C19
2-C19
2-C19
2-C19
2-C19
1-C16
1
29
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