High Impedance Differential Protection Hzpdif; Impedance Protection; Overview; Full-Scheme Distance Protection, Mho Characteristic Zmhpdis - ABB RET670 Operator's Manual

1MRK504114-UEN E
9.3.2.5
9.3.3
9.3.3.1
9.3.3.2
9.3.3.3
Operator's manual
Displays available instances of REFPDIF with some settings per instance. These
are for the Current transformer ratios, operation, rated current Ibaseoperate angle
of the zero sequence directional feature and Idmin which is a percentage of Ibase
and is the current threshold in section one of the characteristic slope.

High impedance differential protection HZPDIF

Main menu/Settings/Setting group N/Differential protection/
HighImpDifferential(PDIF,87)/HZPDIF:x
Displays available instances of HZPDIF with settings for operation, the alarm
voltage level [V] on the CT secondary side, the time delay to activate the alarm, the
operating voltage level [V] on the secondary side of the CT and the value of the
series resistor in [Ω].

Impedance protection

Overview

Under Impedance protection there are settings for Distance zones, Phase selection,
directional impedance, Power swing detection, and Automatic switch onto fault
protection. Each instance of a function can be switched on or off with the operation
parameter and the remaining parameter settings like rated current and voltage are
data required for the function to operate.

Full-scheme distance protection, mho characteristic ZMHPDIS

Main menu/Settings/Setting group N/Impedance Protection/
MhoDistance(PDIS,21)/ZMHPDIS:x
Displays available adjustable parameters. These include the impedance and timer
settings.
Distance protection zones, quadrilateral characteristics ZMQPDIS,
ZMQAPDIS
Main menu/Settings/Setting group N/Impedance protection/
DistanceZones(PDIS,21)/ZMQPDIS:1
Main menu/Settings/Setting group N/Impedance protection/
DistanceZones(PDIS,21)/ZMQAPDIS:x
Displays available adjustable parameters. These include the [Ω] per phase for
resistive and reactive reach as well as the [Ω] per loop for phase to phase, and
phase to earth fault resistance. Zones can also be set on or off.
Read and change settings
Section 9
57