Hitachi Relion 670 Series Commissioning Manual page 126

Section 11
Testing functionality by secondary injection
The following output signals shall be configured to binary outputs: ZOUT, measured impedance within
outer impedance boundary and ZIN, measured impedance within inner impedance boundary and
PICKUP, power swing detection.
1. Set X1InFw, R1LIn, X1InRv, R1FInFw, R1FInRv, ArgLd, RLdOutFw, RLdOutRv, kLdRFw and
kLdRRv to values that are in accordance with the selectivity plan and the corresponding operating
characteristic is shown in Figure 38.
2. Set OperationLdCh to On and set timers tP1, tP2, tW and tH to their default values.
3. Enable the input signal REL1PH to detect the power swing in one of the three phases.
4. The test points that are to be considered for the power swing detection are shown in Figure 38.
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.
120
X1OutFw
X1InFw
X1InRv
X1OutRv
Proposed test points to detect power swing conditions
-1
tan (X1InFw/R1LIn)
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ZL
X
P3 P2
P1
RLdInRv RLdInFw
RLdOutFw
RLdOutRv
IEC18000100-2-en.vsdx
1MRK506371-UUS Rev. M
j
R
Line distance protection REL670
Commissioning manual