3.1. U-Bus = 100%
UBaseBus and f-bus = 50.25 Hz, to verify that the function does not
operate when frequency difference is above limit.
4.
Verify that the closing command is not issued when the frequency difference is less than
the set value
FreqDiffMin.
9.6.1.2
Testing the synchrocheck functionality
M2377-132 v9
During the test of SESRSYN for a single bay arrangement, these voltage inputs are used:
U-Line
UL1, UL2 or UL3 line 1 voltage input on the IED according to the connection in
SMT
U-Bus
Bus voltage input on the IED according to the connection in SMT
Testing the voltage difference
M2377-194 v8
Set the voltage difference to 0.15 p.u. on the local HMI, and the test should check that
operation is achieved when the voltage difference
UDiffSC is lower than 0.15 p.u.
The settings used in the test shall be final settings. The test shall be adapted to site setting
values instead of values in the example below.
Test with no voltage difference between the inputs.
Test with a voltage difference higher than the set
UDiffSC.
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
M2377-215 v8
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
1MRK 505 385-UEN C
Section 9
Testing functionality by secondary injection
Breaker protection REQ650
81
Commissioning manual
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