Hitachi Relion 670 Series Commissioning Manual page 212

Section 11
Testing functionality by secondary injection
Test with a voltage difference higher than the set VDiffSC.
1. Apply voltages V-Line (for example) = 80% GblBaseSelLine and V-Bus = 80%
GblBaseSelBusGblBaseSelBus with the same phase-angle and frequency.
2. Check that the AUTOSYOK and MANSYOK outputs are activated.
3. The test can be repeated with different voltage values to verify that the function trips within the set
VDiffSC. Check with both V-Line and V-Bus respectively lower than the other.
4. Increase the V-Bus to 110% GblBaseSelBus, and the V-Line = 90% GblBaseSelLine and also the
opposite condition.
5. Check that the two outputs for manual and auto synchronism are not activated.
Testing the phase angle difference
The phase angle differences PhaseDiffM and PhaseDiffA respectively are set to their final settings and
the test should verify that operation is achieved when the phase angle difference is lower than this value
both leading and lagging.
Test with no voltage difference.
1. Apply voltages V-Line (for example) = 100% GblBaseSelLine and V-Bus = 100% GblBaseSelBus,
with a phase difference equal to 0 degrees and a frequency difference lower than FreqDiffA and
FreqDiffM.
2. Check that the AUTOSYOK and MANSYOK outputs are activated.
The test can be repeated with other phase difference values to verify that the function trips for
values lower than the set ones, PhaseDiffM and PhaseDiffA. By changing the phase angle on the
voltage connected to V-Bus, between ± dφ degrees, the user can check that the two outputs are
activated for a phase difference lower than the set value. It should not trip for other values. See
figure 52.
ANSI05000551 V1 EN-US
Figure 52:
3. Change the phase angle between +dφ and -dφ and verify that the two outputs are activated for
phase differences between these values but not for phase differences outside, see figure 52.
Testing the frequency difference
The frequency difference test should verify that operation is achieved when the FreqDiffA and FreqDiffM
frequency difference is lower than the set value for manual and auto synchronizing check, FreqDiffA and
FreqDiffM respectively and that operation is blocked when the frequency difference is greater.
Test with frequency difference = 0 mHz
206
V-Bus
No operation
+dj
-dj
V-Bus
Test of phase difference
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V-Line operation
en05000551_ansi.vsd
1MRK506371-UUS Rev. M
M2377-215 v8
M2377-232 v9
Line distance protection REL670
Commissioning manual