ABB RELION RET670, Installation And Commissioning Manual

Page: 184 / 240

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% UBase and U-Bus = 100%
UBase , 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
68 .
+d
j
-d
j
U-Bus
U-Line operation
U-Bus
No operation
en05000551.vsd
IEC05000551 V1 EN
Figure 68: Test of phase difference.
3. Change the phase angle bdφ and -dφ and verify that the two outputs
are activated for phase differences between these values but not for phase
differences outside, see figure
68 .
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 bigger.
Test with frequency difference = 0 mHz
Test with a frequency difference outside the set limits for manual and auto
synchronizing check respectively.
Section 13
1MRK 504 088-UEN C
Verifying settings by secondary injection
178
Installation and commissioning manual