Hitachi Relion 670 Series Commissioning Manual page 166

Section 11
Testing functionality by secondary injection
1. Apply voltages U-Line (for example) = 80% GblBaseSelLine and U-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 operates within
the set UDiffSC. Check with both U-Line and U-Bus respectively lower than the other.
4. Increase the U-Bus to 110% GblBaseSelBus, and the U-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 U-Line (for example) = 100% GblBaseSelLine and U-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 operates
for values lower than the set ones, PhaseDiffM and PhaseDiffA. By changing the phase angle
on the voltage connected to U-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 operate for
other values. See figure 32.
IEC05000551 V1 EN-US
Figure 32:
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 32.
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
Test with a frequency difference outside the set limits for manual and auto synchronizing check
respectively.
160
No operation
+dj
-dj
Test of phase difference
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U-Bus
U-Line operation
U-Bus
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Bay control REC670
Commissioning manual