12.4.15
Under impedance protection for Generator ZGVPDIS
GUID-F882501B-6A03-4409-BF70-DE1CF09E5541 v3
Prepare the IED for verification of settings.
Values of the logical signals for ZGVPDIS are available on the local HMI under Main menu/
Tests/Function status/Impedance/ZGVPDIS (21G, Z<)/1:ZGVPDIS:ZGVPDIS. The Signal
Monitoring in PCM600 shows the same signals that are available on the local HMI.
12.4.15.1
Verifying the settings
GUID-202C5606-5F12-4C00-A12F-02A33EB571D9 v1
GUID-69610335-7C97-4134-8A47-05501AB5C620 v3
Distance protection zones
While measuring operating characteristics, keep the current constant. Keep the current as
close as possible to its rated value or lower, however make sure it is higher than 30% of the
rated current.
If the measurement of the operating characteristics runs under constant voltage conditions,
ensure that the maximum continuous current in an IED does not exceed four times its rated
value.
To verify the zone 1 mho characteristic, at least two points must be tested.
P1
P3
P4
X
R
LineAngle
Z1Fwd
Z1Rev
P2
IEC11000312-2-en.vsd
IEC11000312 V2 EN-US
Figure 53: Proposed four test points for phase-to-phase fault
Where,
Z1Fwd
is the forward positive sequence impedance setting for zone 1
Z1Rev
is the reverse positive sequence impedance setting for zone 1
LineAngle
is the Impedance angle for phase-to-phase fault in degrees
Section 12
1MRK 502 067-UEN B
Testing functionality by secondary injection
150
Commissioning manual
