ABB RED670 Relion 670 series, Руководство по вводу в эксплуатацию

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To verify the mho characteristic, at least two points should be tested.
In the following, three test points are proposed. The mho characteristic always goes
through the origin, which automatically gives a fourth point for the characteristic.
11.4.3.1 Phase-to-phase faults
M14944-292 v8
ZAngPP
ZPP
1
2 3
Ohm/phase
R
X
IEC07000009-4-en.vsd
50%
IEC07000009 V4 EN-US
Figure 27: Proposed test points for phase-to-phase fault
Table 24: Test points for phase-to-phase (ohms / phase)
Test
points
reach Value Comments
1 X ZPP · sin(ZAngPP)
R ZPP · sin(ZAngPP)
2 X 0,5· (ZPP· sin(ZAngPP)
R 0,5·ZPP + ΔR = 0,5·ZPP·(1+cos(ZAngPP))
3 X 0,5·ZPP·sin(ZAngPP)
R 0,5·ZPP - ΔR = 0,5·ZPP(1-cos(ZAngPP))
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
tPP for the actual zone has elapsed, also the signals TRIP,
TRPP and TRx shall be activated.
11.4.3.2 Phase-to-earth faults
M14944-393 v7
For simplicity, the same test points as for phase-to-phase faults are proposed, but
considering new impedance values.
Section 11
1MRK 505 378-UEN A
Testing functionality by secondary injection
122 Line differential protection RED670 2.2 IEC
Commissioning manual