Transformer Differential Protection, Three Winding T3Wpdif; Restricted Earth Fault Protection, Low Impedance Refpdif; High Impedance Differential Protection Hzpdif; Impedance Protection - ABB RET670 Operator's Manual

Section 11
Test the IED
11.6.2.2
11.6.2.3
11.6.2.4
11.6.3
11.6.3.1
11.6.3.2
78

Transformer differential protection, three winding T3WPDIF

Main menu/Test/Function status/Differential protection/
TransDifferential3Wind(PDIF,87T)/T3WPDIF:x
Displays up to two instances of T3WPDIF with several measured values each. The
data output here is identical to that shown in section
protection, two winding T2WPDIF"

Restricted earth fault protection, low impedance REFPDIF

Main menu/Test/Function status/Differential protection/LowImpREF(PDIF,
87N)/REFPDIF:x
Displays available instances of REFPDIF with several measurements per instance.
The data available for this function includes Trip by the restricted earth fault
protection function, start, operation of directional criteria due to internal fault,
block due to second harmonic, start of switch onto fault, activation of second
harmonic analysis, various fault detection indicators and the magnitude various
current values.

High impedance differential protection HZPDIF

Main menu/Test/Function status/Differential protection/
HighImpDifferential(PDIF,87)/HZPDIF:x
Displays available instances of HZPDIF with some measurements per instance.
These are the trip signal, the alarm signal and the measured RMS voltage on the
secondary side of the CT.

Impedance protection

Impedance protection values are viewable in the submenus of the Impedance
protection folder in the HMI. Information such as trip and start signals, trip output,
trip categories etc. is provided.

Full-scheme distance protection, mho characteristic ZMHPDIS

Main menu/Test/Function status/Impedance Protection/MhoDistance(PDIS,
21)/ZMHPDIS:x
Displays the output data of the selected ZMHPDIS instance.
Distance protection zone, quadrilateral characteristic ZMQPDIS,
ZMQAPDIS
Main menu/Test/Function status/Impedance Protection/DistanceZones(PDIS,
21)/ZMQPDIS:1
"Transformer differential
of this document.
1MRK504114-UEN E
Operator's manual