• OpenCT: Open CT detected
• OpenCTAlarm
: Alarm issued after the setting delay
• OpenCTIN: Open CT in CT group inputs (1 for input 1 and 2 for input 2)
• OpenCTPH: Open CT with phase information (1 for phase A, 2 for phase B, 3 for
phase C)
7.3.3.5 Other additional options
SEMOD155693-55 v4
HarmDistLimit: This setting is the total harmonic distortion (2
nd
and 5
th
harmonic) for
the harmonic restrain pick-up. The default limit 10% can be used in normal cases. In
special application, for example, close to power electronic converters, a higher setting
might be used to prevent unwanted blocking.
TempIdMin: If the binary input raise pick-up (DESENSIT) is activated the operation
level of IdMin is increased to the TempIdMin.
Section 1
Operate
conditionally
UnrestrainedLimit
Section 2
Section 3
Restrain
Operate
unconditionally
5
4
3
2
1
0
0 1 2 3 4 5
IdMin
EndSection1
EndSection2
restrain current
[ times IBase ]
operate current
[ times IBase ]
SlopeSection2
SlopeSection3
en06000637.vsd
TempIdMin
IEC06000637 V2 EN-US
Figure 70: The value of TempIdMin
Section 7 1MRK 502 071-UUS A
Differential protection
184 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Application manual
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