Hitachi RER670 Commissioning Manual page 129

1MRK 506 377-UEN Rev. L
3.1. U-Bus = 100% UBaseBus and f-bus = 16.95 Hz, to verify that the function does not
4. Verify that the closing command is not issued as the frequency difference is not within the
limits.
10.9.1.2 Testing the synchrocheck functionality
During the test of SESRSYN for a single bay arrangement, these voltage inputs are used:
U-Line
U-Bus
Testing the voltage difference
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
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.
Railway application RER670
Commissioning manual
operate when frequency difference is above limit.
UL1 or UL2 line voltage input on the IED according to the connection in SMT
Bus voltage input on the IED according to the connection in SMT
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Section 10
Testing functionality by secondary injection
M2377-132 v9
M2377-194 v8
M2377-215 v8
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