Protection Functions
PRS-7367 101
3.17.1.1 Function Block
U3P
CUB_27
I3P
CB_Close
Block
Str
Op
Figure 3.17-1 The function block
3.17.1.2 Signals
Table 3.17-1 Input Signals
The voltage magnitude in all the three phases
The current magnitude in all the three phases
This signal blocks all the binary output signals of the function
Table 3.17-2 Output Signals
This is the integrated start signal.
This is the integrated operation signal.
3.17.2 CUB_27 Protection Principle
The function can be enabled and disabled with the Operation setting. The corresponding
parameter values are "On" and "Off".
The operation of CUB_27 can be described using a module diagram. All the modules in the
diagram are explained in the next sections.