The voltage difference between the voltage connected to U-Bus and U-Lineshould be 0%, so that the AUTOSYOK and MANSYOK outputs are activatedfirst.2. Change the U-Line voltage connection to U-Line2 without changing thesetting on the local HMI. Check that the two outputs are not activated.13.10.1.3 Testing the energizing check M2377-262 v6During the test of the energizing check function for a single bay arrangement, thesevoltage inputs are used:U-Line UL1, UL2 or UL3 line1 voltage inputs on the IEDU-Bus Bus voltage input on the IEDGeneral M2377-271 v6When testing the energizing check function for the applicable bus, arrangementshall be done for the energizing check functions. The voltage is selected byactivation of different inputs in the voltage selection logic.Live voltage level is fixed to 80% UBase and dead voltage level to fixed 40%UBase.The test shall be performed according to the settings for the station. Test thealternatives below that are applicable.Testing the dead line live bus (DLLB) M2377-276 v7The test should verify that the energizing check function operates for a low voltageon the U-Line and for a high voltage on the U-Bus. This corresponds to theenergizing of a dead line to a live bus.1. Apply a single-phase voltage 100% GblBaseSelBus to the U-Bus, and asingle-phase voltage 30% GblBaseSelLine to the U-Line.2. Check that the AUTOENOK and MANENOK outputs are activated after settAutoEnerg respectively tManEnerg.3. Increase the U-Line to 60% GblBaseSelLine and U-Bus to be equal to 100%GblBaseSelBus. 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) M2377-289 v8The test should verify that the energizing check function operates for a low voltageon the U-Bus and for a high voltage on the U-Line. This corresponds to anenergizing of a dead bus to a live line.1MRK 502 073-UEN A Section 13Testing functionality by secondary injectionGenerator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 235Commissioning manual
