Protection Functions
84 PRS-7367
minimum time (IDMT) characteristics. Each stage has same protection logics. Each stage can be
used for tripping or alarming through the related logic settings.
This protection can support all kinds of VT connection: three phase voltage (Ua, Ub, Uc), three
phase-to-phase voltages (Uab, Ubc, Uca), two phase-to-phase voltages (Uab, Ubc), anyone of
three phase voltages or anyone of three phase-to-phase voltages.
3.11.1.1 Function Block
The function block of the protection is as below.
U3P
OVLR_59
Blk
Blk_Op
Blk_Str
Str_A
Op
Str_B
Str_C
Str
Op_A
Op_B
Op_C
Alm
Figure 3.11-1 Function block
3.11.1.2 Signals
Table 3.11-1 Input Signals
The voltage 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 3.11-2 Output Signals
This is the integrated start signal
This is the start signal of phase A
This is the start signal of phase B
This is the start signal of phase C.
This is the integrated operation signal.
This is the operation signal of phase A
To Next Page
Loading...