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Control Chapter 11
Verifying settings by secondary
injection
Testing the voltage difference
Set the voltage difference at 15% UBase on the HMI, and the test should check that operation is
achieved when the voltage difference UDiff is lower than 15% UBase.
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.
1. Apply voltages U-line (e.g.) = 80% UBase and U-Bus = 80% UBase.
2. Check that the AUTOENOK and MANENOK outputs are activated.
3. The test can be repeated with different voltage values to verify that
the function operates within the set
UDiff values. Check with both U1
and U2 respectively lower than the other.
Test with a voltage difference higher than the set UDiffSC
1. Increase the U-bus to 110% UBase, and the U-line = 90% UBase and
also the opposite condition.
2. 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 set-
tings and the test should verify that operation is achieved when the phase angle difference is low-
er than this value both leading and lagging.
Test with no voltage difference
1. Apply voltages U-line (e.g.) = 100% UBase and U-bus = 100% UBase,
with a phase difference equal to 0 degrees and a frequency differ-
ence lower than
fSynchMax.
SYN1 U-line UL1 Activate SYN1_FD1CLD
UL2 Activate SYN1_CB2CLD
U4 Activate SYN1_CB2CLD and CB3CLD
U-bus U5 No activation of inputs necessary
SYN2 U-line UL2 Activate SYN2_FD2CLD
U4 Activate SYN2_CB3CLD
U-bus UL1 Activate SYN2_FD1CLD
U5 Activate SYN2_CB1CLD
SYN3 U-line UL1 Activate SYN3_CB2CLD
UL2 Activate SYN3_FD2CLD
U5 Activate SYN3_CB1CLD and CB2CLD
U-bus U4 No activation of inputs necessary
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