Table of Contents

ABB / Current reversal and weak-end infeed logic for phase segregated communication (ZC1WPSCH) _ Setting & highlights _ AB2104

Table of Contents

Overview

The “Current reversal and weak-end infeed logic for phase segregated communication (ZC1WPSCH)” function is used to prevent unwanted operations due to current reversal when using permissive overreach protection schemes in application with parallel lines where the overreach from the two ends overlaps on the parallel line.

For more detailed information on “Current reversal and weak-end infeed logic for phase segregated communication (ZC1WPSCH)” function, refer to ABB, Relion 670 Series manuals.

To see other supported functions, click here.


Function Identification

Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Current reversal and weak-end infeed logic for phase segregated communication ZC1WPSCH 85

Signals & Setting Parameters


ZC1WPSCH function block

ZC1WPSCH function block

ZC1WPSCH Input signals

ZC1WPSCH Input signals
Name Type Default Description
U3P GROUP SIGNAL Voltage
BLOCK BOOLEAN 0 Block of function
BLKZ BOOLEAN 0 Block of trip from WEI logic by the fuse-failure function
CBOPEN BOOLEAN 0 Block of trip from WEI logic by an open breaker
CRL1 BOOLEAN 0 Carrier receive for WEI logic in Phase L1
CRL2 BOOLEAN 0 Carrier receive for WEI logic in Phase L2
CRL3 BOOLEAN 0 Carrier receive for WEI logic in Phase L3
IRVL1 BOOLEAN 0 Activation of current reversal logic in Phase L1
IRVL2 BOOLEAN 0 Activation of current reversal logic in Phase L2
IRVL3 BOOLEAN 0 Activation of current reversal logic in phase L3
IRVBLKL1 BOOLEAN 0 Block of current reversal function in Phase L1
IRVBLKL2 BOOLEAN 0 Block of current reversal function in Phase L2
IRVBLKL3 BOOLEAN 0 Block of current reversal function in Phase L3
WEIBLK BOOLEAN 0 Block of WEI logic
WEIBLKL1 BOOLEAN 0 Block of WEI logic in Phase L1
WEIBLKL2 BOOLEAN 0 Block of WEI logic in Phase L2
WEIBLKL3 BOOLEAN 0 Block of WEI logic in Phase L3
WEIBLKOP BOOLEAN 0 Block of WEI logic due to operation of other protection
WEIBLKO1 BOOLEAN 0 Block of WEI logic in Phase L1 due to operation of other protection
WEIBLKO2 BOOLEAN 0 Block of WEI logic in Phase L2 due to operation of other protections
WEIBLKO3 BOOLEAN 0 Block of WEI logic in Phase L3 due to operation of other protections

ZC1WPSCH Output signals

ZC1WPSCH Output signals
Name Type Description
TRPWEI BOOLEAN Trip of WEI logic
TRPWEIL1 BOOLEAN Trip of WEI logic in Phase L1
TRPWEIL2 BOOLEAN Trip of WEI logic in Phase L2
TRPWEIL3 BOOLEAN Trip of WEI logic in Phase L3
IRVOP BOOLEAN Operation of current reversal logic
IRVOPL1 BOOLEAN Operation of current reversal logic in Phase L1
IRVOPL2 BOOLEAN Operation of current reversal logic in Phase L2
IRVOPL3 BOOLEAN Operation of current reversal logic in Phase L3
ECHO BOOLEAN Carrier Send by WEI logic
ECHOL1 BOOLEAN Carrier Send by WEI logic in Phase L1
ECHOL2 BOOLEAN Carrier Send by WEI logic in Phase L2
ECHOL3 BOOLEAN Carrier Send by WEI logic in Phase L3

ZC1WPSCH Group settings (basic)

ZC1WPSCH Group settings (basic)
Name Values (Range) Unit Step Default Description
OperCurrRev Off
On
Off Operating mode of Current Reversal Logic
tPickUpRev 0.000 – 60.000 s 0.001 0.020 Pickup time for current reversal logic
tDelayRev 0.000 – 60.000 s 0.001 0.060 Time Delay to prevent Carrier send and local trip
OperationWEI Off
Echo
Echo & Trip
Off Operating mode of WEI logic
UPE< 10 – 90 %UB 1 70 Phase to Earth voltage for detection of fault condition
UPP< 10 – 90 %UB 1 70 Phase to Phase voltage for detection of fault condition
tPickUpWEI 0.000 – 60.000 s 0.001 0.010 Coordination time for the WEI logic

ZC1WPSCH Non group settings (basic)

ZC1WPSCH Non group settings (basic)
Name Values (Range) Unit Step Default Description
GlobalBaseSel 1 – 12 1 1 Selection of one of the Global Base Value groups

Logics & highlights


Simplified logic diagram for current reversal

Simplified logic diagram for current reversal

Simplified logic for weak-end infeed logic — Echo

Simplified logic for weak-end infeed logic — Echo

Simplified logic diagram for weak-end infeed logic – Echo & Trip

Simplified logic diagram for weak-end infeed logic – Echo & Trip

Blocking of echo signal using WEIBLKLx input of ZC1WPSCH

Blocking of echo signal using WEIBLKLx input of ZC1WPSCH

Blocking of echo signal using WEIBLKOx input of ZC1WPSCH

Blocking of echo signal using WEIBLKOx input of ZC1WPSCH

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