Phase-To-Phase Faults; Phase-To-Earth Faults - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
11.4.3.1

Phase-to-phase faults

IEC07000009 V4 EN-US
Figure 29: Proposed test points for phase-to-phase fault
Table 24: Test points for phase-to-phase (ohms / phase)
Test
points
1
2
3
Change the magnitude and angle of phase-to-phase voltage to achieve impedances at test
points 1, 2 and 3. For each test point, observe that the output signals, START, STLx and STPP
are activated where x refers to the actual phase to be tested. After the timer
zone has elapsed, also the signals TRIP, TRPP and TRx shall be activated.
11.4.3.2

Phase-to-earth faults

For simplicity, the same test points as for phase-to-phase faults are proposed, but
considering new impedance values.
114
X
3
50%
ZAngPP
reach Value
X ZPP · sin(ZAngPP)
R ZPP · sin(ZAngPP)
X 0,5· (ZPP· sin(ZAngPP)
R 0,5·ZPP + ΔR = 0,5·ZPP·(1+cos(ZAngPP))
X 0,5·ZPP·sin(ZAngPP)
R 0,5·ZPP - ΔR = 0,5·ZPP(1-cos(ZAngPP))
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1
ZPP
2
R
Ohm/phase
IEC07000009-4-en.vsd
1MRK 504 165-UEN E
Comments
tPP for the actual
Transformer protection RET670
Commissioning manual
M14944-292 v8
M14944-393 v7