Sel SEL-421 - Permissive Trip Received Logic Diagram

R.1.103
Date Code 20111215 Reference Manual SEL-421 Relay
Protection Functions
Directional Comparison Unblocking Scheme Logic
Figure 1.66 Permissive Trip Received Logic Diagram
PTRX
Relay
Word
Bit
UBB
UBB1
UBB2
Relay
Word
Bits
ECOMM := POTT
ECOMM := POTT2
PT1
PT1
PT3
SPT
PTA
TPA
SPOA
TPB
SPOB
TPC
SPOC
PTB
PTC
Settings
ECOMM := DCUB2
PTRX1
PTRX2
ECOMM := DCUB1
ECOMM := POTT3
Settings
Relay
Word
Bits
ECOMM := DCUB1
Setting
ECOMM := DCUB2
Setting
Setting
0.25
CYC
0.25
CYC
0
0.25
CYC