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•
The direction element
•
The harmonic Restraint Blocking function
•
The four step over current function
•
The mode selection
If VT inputs are not available or not connected, setting parameter
DirModeSelx
shall be left to default value,
Non-directional
.
ANSI05000740-2-en.vsd
Direction
Element
4 step over current
element
One element for each
step
Harmonic
Restraint
Mode Selection
dirPhAFlt
dirPhBFlt
dirPhCFlt
harmRestrBlock
enableDir
enableStep1-4
DirectionalMode1-4
faultState
Element
faultState
I3P
V3P
PICKUP
TRIP
ANSI05000740 V2 EN
Figure 88:
Functional overview of OC4PTOC (51/67)
The sampled analog phase currents are processed in a pre-processing function block.
Using a parameter setting
MeasType
within the general settings for the four step phase
overcurrent protection 3-phase output function OC4PTOC (51/67), it is possible to select
Section 8
1MRK 502 048-UUS A
Current protection
198
Technical manual
Содержание 650 series
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