ABB Relion 670 series, Technical Reference Manual

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13.6.3 Function block
ANSI06000289-1-en.vsd
ECRWPSCH (85)
V3P*
BLOCK
IFWD
IREV
WEIBLK1
WEIBLK2
LOVBZ
CBOPEN
CRL IRVL
TRWEI
ECHO
CR
ANSI06000289 V1 EN
Figure 408: ECRWPSCH (85) function block
13.6.4 Input and output signals
Table 440: ECRWPSCH (85) Input signals
Name Type Default Description
V3P GROUP
SIGNAL
- Group signal for voltage input
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 441: 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
1MRK505222-UUS C
Section 13
Scheme communication
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Technical reference manual