LV generator protection - engineering site - Schneider Electric

E88760POWERLOGIC System Manager DemoFile Edit View Setup Control Display ToolsReports Window HelpTimeEventSampling Mode : MANUALPhase A-N Voltage - Harmonics Analysis5 secondsModuleWith the communication optionE88761% FundamentalReady1,201,000,800,600,400,200,00H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12Display of harmonics up to 12th order.ReadyWaveform capture.HarmonicsFundamental:RMS:RMS-H:Peak:CF:THD:Phase 1-NHarmonics(RMS)H1: 118.09H2: 0.01H3: 0.45H4: 0.03H5: 0.45H6: 0.04H7: 1.27H8: 0.05H9: 0.42H10: 0.01H11: 1.03H12: 0.07ONLINE: DEMO No working system 9:30POWERLOGIC System Manager DemoFile Edit View Setup Control Display ToolsReports Window Help167830-83-167167830-83-167Phase A-N Voltage17 33 50 66Phase B-N Voltage17 33 50Sampling Mode : MANUAL6423210-321ONLINE: DEMO No working system 9:30OK5 secondsPhase A Current17 33 50Your Specific Device - Phase A-N Voltage-642Fundamental: 118.08RMS: 118.11RMS-H: 2.38Peak: 166.86CF: 1.41THD: 2.02OKHarmonics(RMS)H1: 118.09H2: 0.01H3: 0.45H4: 0.03H5: 0.45H6: 0.04H7: 1.27H8: 0.05H9: 0.42H10: 0.01H11: 1.03H12: 0.0766Additional measurements, maximeters and minimetersCertain measured or calculated values are only accessible with the COMcommunication option:b I peak/ 2, (I 1+ I 2+ I 3)/3, I imbalanceb load level in % Irb power factor (total and per phase)b voltage and current THDb K factors of currents and average K factorb crest factors of currents and voltagesb all the fundamentals per phaseb fundamental current and voltage phase displacementb distortion power and distortion factor phase by phaseb amplitude and displacement of current and voltage harmonics 3 to 31.The maximeters and minimeters are available only via the COM option for usewith a supervisor.Waveform captureThe Micrologic H control unit stores the last 4 cycles of each instantaneouscurrent or voltage measurement. On request or automatically on programmedevents, the control unit stores the waveforms. The waveforms may be displayedin the form of oscillograms by a supervisor via the COM option.Enhanced alarm programmingEach instantaneous value can be compared to user-set high and low thresholds.Overrun of a threshold generates an alarm. An alarm or combinations of alarmscan be linked to programmable actions, including circuit-breaker opening,activation of a M2C or M6C contact, selective recording of measurements in alog, waveform capture, etc.Event log and maintenance registersThe Micrologic H offers the same event log and maintenance register functionsas the Micrologic P.Additional technical characteristicsE88762POWERLOGIC System Manager DemoFile Edit View Setup Control Display ToolsReports Window HelpSampling Mode : MANUAL5 secondsSetting the display languageSystem messages may be displayed in six different languages. The desiredlanguage is selected via the keypad.TimeEventModuleProtection functionsAll current-based protection functions require no auxiliary source. Voltage-basedprotection functions are connected to AC power via a voltage measurement inputbuilt into the circuit breaker.Measurement functionsMeasurement functions are independent of the protection functions.The high-accuracy measurement module operates independently of theprotection module, while remaining synchronised with protection events.ReadyLog.ONLINE: DEMO No working system 9:30Measurement-calculation modeAn analogue calculation function dedicated to measurements enhances theaccuracy of harmonic calculations and the power-quality indicators. TheMicrologic H control unit calculates electrical magnitudes using 1.5 x In dynamics(20 x In for Micrologic P).Measurement functions implement the new "zero blind time" conceptEnergies are calculated on the basis of the instantaneous power values, in thetraditional and signed modes.Harmonic components are calculated using the discrete Fourier transform(DFT).69