ABB RELION REG670 Commissioning Manual page 157

1MRK 502 067-UEN B
Test points
P1
P2
P3
P4
Change the magnitude and angle of phase-to-phase voltage, to achieve impedances at test
points P1, P2, P3 and P4. For each test point, observe that the output signals, START and STZ1
are activated where x refers to the actual phase to be tested. After the operate time delay for
the zone 1 has elapsed, the signals TRIP and TRZ1 shall be activated.
To verify zone 2 and zone 3 mho characteristic, at least two points must be tested.
IEC11000313 V2 EN-US
Figure 54: Proposed four test points for phase-to-earth fault
Where,
ZxFwd
ZxRev
LineAngle
Test points
P1
P2
P3
P4
Commissioning manual
X
Z1Fwd · sin( LineAngle )
(( Z1Fwd - Z1Rev / 2) · sin( LineAngle ))
(( Z1Fwd - Z1Rev / 2) · sin( LineAngle ))
- Z1Rev · sin LineAngle
X
P3
LineAngle
ZxRev
P4
is the forward positive sequence impedance setting for zone x (where, x is 2- 3
depending on the zone selected)
is the reverse positive sequence impedance setting for zone x (where x is 2- 3
depending on the zone selected)
is the Impedance angle for phase-to-phase fault in degrees
X
ZxFwd · sin( LineAngle )
ZxFwd - ZxRev / 2) · sin( LineAngle ))
((
ZxFwd - ZxRev / 2) · sin( LineAngle ))
((
ZxRev · sin( LineAngle )
-
R
Z1Fwd · cos( LineAngle )
Z1Fwd / 2 · (1 + cos( LineAngle ) + Z1Rev / 2 · (1
– cos(
- Z1Fwd / 2 · (1 – cos( LineAngle ) + Z1Rev / 2 ·
(1 + cos(
- Z1Rev · cos( LineAngle )
P1
ZxFwd
P2
IEC11000313-1-en.vsd
R
ZxFwd · cos( LineAngle )
ZxFwd / 2 · (1 + cos( LineAngle ) + ZxRev /2 · (1
– cos(
ZxFwd / 2 · (1 – cos( LineAngle ) + ZxRev / 2 ·
-
(1 + cos(
ZxRev · cos( LineAngle )
-
Testing functionality by secondary injection
LineAngle ))
LineAngle ))
R
LineAngle ))
LineAngle ))
Section 12
151