Power Quality Monitoring
Power Quality Monitoring Power Quality Monitoring
▼Chapter 2Power quality analyserUMG 511 power quality analyserAdded value with additional functionsThe UMG 511 power quality analyser serves for the purpose ofcontinuous monitoring of the power quality e.g. in accordancewith EN 50160. This serves for the purpose of monitoring the supplypower quality from the energy supply side. The UMG 511 canalso be used in applications for failure analysis on the consumerside and is also used as a preventative measure for network perturbations.A rapid, cost-optimised and reliable communicationsystem can be developed through the Ethernet connection. Theinstrument’s own homepage offers you the opportunity to call upthe data or configure the instrument directly using the embeddedweb server.The large number of digital and analogue inputs and outputs offer a variety of communication systems possibilities and allowsconnection to PLC systems and independent control tasks. The GridVis analysis software represents a fundamental part of the standarddelivery. The GridVis can be used to practically trigger analysis in accordance with EN 50160 with the click of a button. Thepresentation of online data and the analysis of historical data is also a benefit for finding the root cause of network problems.▼Main features Measurement of power quality according to DIN EN 61000-4-30, Class A Fourier analysis 1 st to 63 rd harmonic for U-LN, U-LL, I, P (consumption/supply) and Q (ind./cap.) Measurement of harmonics and interharmonics (U-LN, U-LL, I) according to DIN EN 61000-4-7 Analysis and evaluation according to DIN EN 50160 with the contained programming and analysissoftware GridVis Flicker measurement according to DIN EN 61000-4-15 Measurement in TN and TT grids (600V CATIII) 4 voltage measuring inputs, 4 current measuring inputs Continuous sampling of voltage and current inputs with 20kHz Recording of more than 2000 different measurement parameter per measuring cycle (200ms) Detection of transients >50µs and storage with up to 16.000 samples Data logger / Event memory (256MB Flashdisk) 8 digital inputs and 5 digital outputs Profibus DP/V0 alternatively RS 485 (Modbus RTU, Modbus-Master, optional BACnet) Ethernet (Web-Server, E-Mail, optional BACnet) Programming of customer specific applications in Jasic ®ApplicationsThe power quality analyser which is equipped with 4 current andvoltage inputs collects and digitalises the effective values (TrueRMS) from currents and voltages in 40-70Hz (15-440Hz) networks.The integrated microprocessor calculates the electrical parametersfrom the sampling values. The relevant voltage can be definedas a phase-neutral or a phase-phase voltage for measurement ina three-phase system. The voltage serves the UMG 511 as a refe-rence voltage for harmonic measurement, transient and eventrecording and for the flicker meter. A nominal current can be setusing this for the measurement of electrical current events. The 4thcurrent and voltage input represents a separate measurementsystem. However, it is generally used for measuring the current inthe neutral or PE conductor or used for measuring a voltage differencebetween N and PE.83
UMG 511Display examplesThe backlighted active matrix display (5,7“) of the UMG 511 enables the presentation of measurement values in numerical form,as a bar chart or as a line graph. Selected displays can automatically be displayed in alternation (automatic display rotation). Theinstrument is programmed using userfriendly clear text menus or the GridVis software.Example of a UMG 511 connection illustrationMain measurementMeasurement in a four-phase network with mainmeasurement and auxiliary measurementThe UMG 511 has 4 measurement channelsfor current and voltage. The first three channels(main measurement) are intended for use in athree-phase system.Auxiliary measurementThe auxiliary measurement can be used formeasurement in a single-phase or symmetricalthree-phase system. Alternatively, the currentinput can be allocated to the three-phasesystem of the main measurement for measuringthe neutral-conductor current. For example,the voltage input could then be used for recordingthe voltage between the neutral conductorand PE. The auxiliary measurement providesall measurement parameters like in the mainmeasurement (current, voltage, power, harmonics,transients, events and flicker).84
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UMG 511Display examplesThe backlighted active matrix display (5,7“) of the UMG 511 enables the presentation of measurement values in numerical form,as a bar chart or as a line graph. Selected displays can automatically be displayed in alternation (automatic display rotation). Theinstrument is programmed using userfriendly clear text menus or the GridVis software.Example of a UMG 511 connection illustrationMain measurementMeasurement in a four-phase network with mainmeasurement and auxiliary measurementThe UMG 511 has 4 measurement channelsfor current and voltage. The first three channels(main measurement) are intended for use in athree-phase system.Auxiliary measurementThe auxiliary measurement can be used formeasurement in a single-phase or symmetricalthree-phase system. Alternatively, the currentinput can be allocated to the three-phasesystem of the main measurement for measuringthe neutral-conductor current. For example,the voltage input could then be used for recordingthe voltage between the neutral conductorand PE. The auxiliary measurement providesall measurement parameters like in the mainmeasurement (current, voltage, power, harmonics,transients, events and flicker).84
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