ABB Relion 670 series - Technical data; Automatic switch onto fault logic, voltage and current based ZCVPSOF; Introduction

Table 173: PSPPPAM (78) Non group settings (basic)
Name Values (Range) Unit Step Default Description
IBase 0.1 - 99999.9 A 0.1 3000.0 Base Current (primary phase current in
Amperes)
Vbase 0.1 - 9999.9 kV 0.1 20.0 Base Voltage (primary phase-to-phase
voltage in kV)
MeasureMode PosSeq
AB
BC
CA
- - PosSeq Measuring mode (PosSeq, AB, BC, CA)
InvertCTcurr No
Yes
- - No Invert current direction
6.13.6 Technical data
Table 174: PSPPPAM (78) technical data
Function Range or value Accuracy
Impedance reach (0.00–1000.00)% of Zbase ± 2.0% of Vn/In
Characteristic angle (72.00–90.00) degrees ± 5.0 degrees
Start and trip angles (0.0–180.0) degrees ± 5.0 degrees
Zone 1 and Zone 2 trip counters (1-20) -
6.14 Automatic switch onto fault logic, voltage and current
based ZCVPSOF
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Automatic switch onto fault logic,
voltage and current based
ZCVPSOF - -
6.14.1 Introduction
Automatic switch onto fault logic, voltage and current based (ZCVPSOF) is a function
that gives an instantaneous trip at closing of breaker onto a fault. A dead line detection
check is provided to activate the function when the line is dead.
Mho distance protections can not operate for switch onto fault condition when the
phase voltages are close to zero. An additional logic based on VI Level is used for this
purpose.
Section 6 1MRK505222-UUS C
Impedance protection
368
Technical reference manual