Protection Functions
78 PRS-7367
I 3P
OCPD_46D
Blk
Blk_Str
Blk_Op
Str
Op
Figure 3.9-1 Function block
3.9.1.2 Signals
Table 3.9-1 Input Signals
The current magnitude in all the three phases
This signal blocks all the binary output signals of the function
This signal blocks all the start outputs of the function
This signal blocks all the trip signals of the function.
Table 3.9-2 Output Signals
This is the integrated start signal
This is the integrated operation signal.
3.9.2 46D Protection Principle
The phase discontinuity protection function can be enabled or disabled by setting the
corresponding 46D_Ena parameter values as "1" or "0".
The phase discontinuity protection can be described by using a module diagram. All the modules
in the diagram are explained in the next sections.
The initiation logic diagram is shown as below:
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