The voltage difference between the voltage connected to U-Bus and U-Line
should be 0%, so that the AUTOSYOK and MANSYOK outputs are
activated first.
2. Change the U-Line voltage connection to U-Line2 without changing the
setting on the local HMI. Check that the two outputs are not activated.
15.11.1.3 Testing the energizing check
During the test of the energizing check function for a single bay arrangement, these
voltage inputs are used:
U-Line UL1, UL2 or UL3 voltage input on the IED
U-Bus Bus voltage input on the IED
General
When testing the energizing check function for the applicable bus, arrangement
shall be done for the energizing check functions. The voltage is selected by
activation of different inputs in the voltage selection logic.
The test shall be performed according to the settings for the station. Test the
alternatives below that are applicable.
Testing the dead line live bus (DLLB)
The test should verify that the energizing check function operates for a low voltage
on the U-Line and for a high voltage on the U-Bus. This corresponds to the
energizing of a dead line to a live bus.
1. Apply a single-phase voltage 100% UBaseBus to the U-Bus, and a single-
phase voltage 30% UBaseLine to the U-Line.
2. Check that the AUTOENOK and MANENOK outputs are activated.
3. Increase the U-Line to 60% UBaseLine and U-Bus to be equal to 100%
UBaseBus. The outputs should not be activated.
4. The test can be repeated with different values on the U-Bus and the U-Line.
Testing the dead bus live line (DBLL)
The test should verify that the energizing check function operates for a low voltage
on the U-Bus and for a high voltage on the U-Line. This corresponds to an
energizing of a dead bus to a live line.
1. Verify the local HMI settings AutoEnerg or ManEnerg to be DBLL.
2. Apply a single-phase voltage of 30% UBaseBus to the U-Bus and a single-
phase voltage of 100% UBaseLine to the U-Line.
3. Check that the AUTOENOK and MANENOK outputs are activated.
4. Decrease the U-Line to 60% UBaseLine and keep the U-Bus equal to 30%
UBaseBus. The outputs should not be activated.
5. The test can be repeated with different values on the U-Bus and the U-Line.
Section 15 1MRK 502 029-UEN A
Verifying settings by secondary injection
218
Installation and commissioning manual
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