ABB RED670 Commissioning Manual page 138

Section 11
Testing functionality by secondary injection
IEC18000100 V1 EN-US
Figure 38:
Where,
φ =
5. Inject voltage in one of the three phases in accordance with the test point P1 by keeping constant
current in three phases throughout testing and maintaining rated voltage for the other two phases.
6. Vary the faulty phase voltage to achieve the impedance at the test point P2. At this point, observe
that the output ZOUT is activated and then continue to inject for a duration greater than tP1.
7. Inject the faulty phase voltage to achieve the impedance at the test point P3. At this point, observe
that the outputs ZIN and START are activated. It indicates that power swing has been detected.
8. Inject the faulty phase voltage in accordance with the test point P1.
9. At this condition, the outputs ZIN and ZOUT get deactivated and START signal will be maintained
for a set duration of tH.
10. To detect consecutive power swings, repeat steps 5, 6,
START will be activated.
11. Repeat step
12. Repeat step
13. At this condition, it will be detected as consecutive power swing and the output signal START will
be maintained.
14. Repeat step
disappear after set duration of tH from the instance of step 13.
15. Repeat the above steps to test and detect power swing condition in at least two phases by enabling
input REL2PH.
132
X1OutFw
X1InFw
X1InRv
X1OutRv
Proposed test points to detect power swing conditions
-1
tan (X1InFw/R1LIn)
6 and inject before the expiration of timer tW. The output ZOUT will be activated.
7 after a set duration of tP2. The output ZIN will be activated.
8 and the outputs ZOUT and ZIN get deactivated. The output signal START will
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ZL
X
P3 P2
P1
RLdInRv RLdInFw
RLdOutFw
RLdOutRv
IEC18000100-2-en.vsdx
7 and 8. With this condition, the output
1MRK 505 378-UUS Rev. J
j
R
Line differential protection RED670
Commissioning manual