Table of Contents

ABB / Phase preference logic (PPLPHIZ) _ Setting & highlights _ AB2031

Table of Contents


The “Phase preference logic (PPLPHIZ)” function is intended to be used in isolated or high impedance earthed networks where there is a requirement to operate on only one of the faulty lines during a cross-country fault. It can be used without preference to restrain operation for single earth faults with a delayed zero-sequence current release.

For more detailed information on “Phase preference logic (PPLPHIZ)” function, refer to ABB, Relion 670 Series manuals.

To see other supported functions, click here.

Function Identification

Function description IEC 61850
IEC 60617
device number
Phase preference logic PPLPHIZ

Signals & Setting Parameters

PPLPHIZ function block

1-PPLPHIZ function block

PPLPHIZ Input signals

PPLPHIZ Input signals
Name Type Default Description
I3P GROUP SIGNAL Group signal for current input
U3P GROUP SIGNAL Group signal for voltage input
BLOCK BOOLEAN 0 Block of function
RELL1N BOOLEAN 0 Release condition for the L1 to earth loop
RELL2N BOOLEAN 0 Release condition for the L2 to earth loop
RELL3N BOOLEAN 0 Release condition for the L3 to earth loop
STCND INTEGER 0 Integer coded external release signals

PPLPHIZ Output signals

PPLPHIZ Output signals
Name Type Description
START BOOLEAN Indicates start for earth fault(s), regardless of direction
ZREL INTEGER Integer coded output release signal

PPLPHIZ Group settings (basic)

PPLPHIZ Group settings (basic)
Name Values (Range) Unit Step Default Description
OperMode No Filter
No Filter Operating mode (c=cyclic,a=acyclic)
UPN< 0 – 100 %UB/sq 3 1 70 Operate value of phase undervoltage in % of UBase/sqrt(3)
UPP< 0 – 100 %UB 1 50 Operate value of line to line undervoltage (% of UBase)
3U0> 5 – 300 %UB/sq 3 1 20 Operate value of residual voltage in % of UBase/sqrt(3)
IN> 10 – 200 %IB 1 20 Operate value of residual current (% of IBase)
tUN 0.000 – 60.000 s 0.001 0.100 Pickup-delay for residual voltage
tOffUN 0.000 – 60.000 s 0.001 0.100 Dropoff-delay for residual voltage
tIN 0.000 – 60.000 s 0.001 0.150 Pickup-delay for residual current

PPLPHIZ Non group settings (basic)

PPLPHIZ 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

Phase preference logic overview

2-Phase preference logic overview

Residual current criteria

3-Residual current criteria

Phase selection

4-Phase selection



No Filter mode

6-No Filter mode

No Preference mode

7-No Preference mode

Phase preference 1

8-Phase preference 1

Phase preference 2

9-Phase preference 2



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