Name Type Description
PU_ST1 BOOLEAN Start signal from step 1
PU_ST2 BOOLEAN Start signal from step 2
PU_ST3 BOOLEAN Start signal from step 3
PU_ST4 BOOLEAN Start signal from step 4
PU_A BOOLEAN Pickup signal from phase A
PU_B BOOLEAN Pickup signal from phase B
PU_C BOOLEAN Pickup signal from phase C
2NDHARM BOOLEAN Block from second harmonic detection
7.1.5 Settings
Table 29: OC4PTOC (51_67) Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Disable/Enable Operation
DirModeSel1 Disabled
Non-directional
Forward
Reverse
- - Non-directional Directional mode of step 1 off / non-
directional / forward / reverse
Characterist1 ANSI Ext. inv.
ANSI Very inv.
ANSI Norm. inv.
ANSI Mod. inv.
ANSI Def. Time
L.T.E. inv.
L.T.V. inv.
L.T. inv.
IEC Norm. inv.
IEC Very inv.
IEC inv.
IEC Ext. inv.
IEC S.T. inv.
IEC L.T. inv.
IEC Def. Time
Reserved
RI type
RD type
- - ANSI Def. Time Selection of time delay curve type for step 1
Pickup1 5 - 2500 %IB 1 1000 Phase current operate level for step1 in % of
IBase
t1 0.000 - 60.000 s 0.001 0.000 Definite time delay of step 1
TD1 0.05 - 999.00 - 0.01 0.05 Time multiplier for the inverse time delay for
step 1
IMin1 5 - 10000 %IB 1 100 Minimum operate current for step1in% of IBase
t1Min 0.000 - 60.000 s 0.001 0.000 Minimum operate time for inverse curves for
step 1
Table continues on next page
1MRK 505 277-UUS C Section 7
Current protection
75
Technical Manual
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