Under Impedance Protection For Generator Zgvpdis; Verifying The Settings - ABB RELION REG670 Commissioning Manual

Section 12
Testing functionality by secondary injection
12.4.15

Under impedance protection for Generator ZGVPDIS

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

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.
IEC11000312 V2 EN-US
Figure 53: Proposed four test points for phase-to-phase fault
Where,
Z1Fwd
Z1Rev
LineAngle
150
X
P3
LineAngle
Z1Rev
P4
is the forward positive sequence impedance setting for zone 1
is the reverse positive sequence impedance setting for zone 1
is the Impedance angle for phase-to-phase fault in degrees
P1
Z1Fwd
P2
R
IEC11000312-2-en.vsd
1MRK 502 067-UEN B
GUID-F882501B-6A03-4409-BF70-DE1CF09E5541 v3
GUID-202C5606-5F12-4C00-A12F-02A33EB571D9 v1
GUID-69610335-7C97-4134-8A47-05501AB5C620 v3
Commissioning manual