12.6.3
Function block
ANSI09000006-1-en.vsd
ECRWPSCH (85)
V3P*
BLOCK
IFWD
IREV
WEIBLK1
WEIBLK2
LOVBZ
CBOPEN
CRL
IRVL
TRWEI
ECHO
CR
ANSI09000006 V1 EN
Figure 248:
ECRWPSCH (85) function block
12.6.4
Signals
Table 357:
ECRWPSCH (85) Input signals
Name
Type
Default
Description
V3P
GROUP
SIGNAL
-
Three phase group signal for voltage inputs
BLOCK
BOOLEAN
0
Block of function
IFWD
BOOLEAN
0
A signal that indicates a forward fault has been detected
and will block tripping if there was a pre-existing reverse
fault condition (IREV)
IREV
BOOLEAN
0
A signal that indicates a reverse fault has been detected
and activates current reverasl logic
WEIBLK1
BOOLEAN
0
Block of WEI Logic
WEIBLK2
BOOLEAN
0
Block of WEI logic due to operation of other protections
that would effect a pilot trip or the detection of reverse
faults that will be tripped by an external device
LOVBZ
BOOLEAN
0
Block of trip from WEI logic through the loss of voltage
(fuse-failure) function
CBOPEN
BOOLEAN
0
Block of trip from WEI logic by an open breaker
CRL
BOOLEAN
0
POTT or Unblock carrier receive for WEI logic
Table 358:
ECRWPSCH (85) Output signals
Name
Type
Description
IRVL
BOOLEAN
Operation of current reversal logic
TRWEI
BOOLEAN
Trip of WEI logic
ECHO
BOOLEAN
A signal that indicates channel start (CS) by WEI logic
CR
BOOLEAN
POR Carrier signal received from remote end
Section 12
1MRK 506 335-UUS A
Scheme communication
524
Technical manual
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