Power Quality Monitoring
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Power Quality Monitoring

Power Quality Monitoring Power Quality Monitoring

contaclip.ru
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11.07.2015 Views

▼Chapter 2Power analyserUMG 507 power analyserMulti-function power analyserThe use of energy measurement technology in energy distributionhas moved dynamically towards digital universal measuring instrumentsin the past few years. The advantages are obvious: lowerequipment costs for more information and functionality. Inaddition, digital measuring technology is more accurate, even allalong the entire lifespan.Clear cost advantages also result from the construction of the cabinetwhich results in lower installation costs and less wiring effortsin comparison to analogue measuring technology. Power analysersof the UMG 507 product family are designed for use at all networklevels.Due to the continuous measurement, short-term interruptions are registered and the fault recorder function provides more informationabout the event. A rapid, cost-optimised and reliable communication system can be developed through the Ethernet connection.The instrument’s own homepage offers you the opportunity to call up the data or configure the instrument directly using theembedded web server. The large number of digital and analogue inputs and outputs offers a variety of communicationpossibilities and allow connection to PLC controls and independent control tasks. The integrated harmonic analysis becomes moresignificant with increasing network pollution (increasing THD-U values).▼Main featuresContinuous measurementData collection of short-term interruptionsEthernet and embedded web serverHarmonics analysis6 digital inputs, 6 digital outputs, 2 analogue outputs, 1 analogue input1 temperature inputIntegrated logic for control tasks and alarm signals Modbus master, Ethernet/Modbus gatewayThis allows the safe identification of short-term interruptions withApplicationsThe three-phase electronic measuring instrument collects and digitalisesthe effective values of currents and voltages (True RMS) in a50/60Hz network. The integrated microprocessor calculates the electricalparameters from the sampling values. All measurement valuesare continuously measured and recorded at intervals of 200ms over10 periods (50 Hz).the fault recorder function. For short-term events, the effective valuesare recorded over 128 periods with 64 pre-trigger periods and withthe transient memory over 5 periods with 2 pre-trigger periods.The reaction time of the internal outputs is < 10ms and the externalbus outputs < 200ms.69

UMG 507GridVis softwareThe UMG 507 power analysers already contain the GridVis software upon delivery. On one hand, this software enables simple and completeparameterisation of the respective measurement instruments and on the other hand, can analyse the measurement value memory inthe unit. In GridVis, the data is stored in a database and can be processed in MS Excel for example. GridVis also allows online presentationof the measurement values. More information is available in chapter 5 – “software”.Peak demand management (Emax)The release of the Emax function for peak demand management is available as an option. More information can be found in chapter 3 –energy management.Embedded web server / e-mailWorldwide access to the UMG 507 can be gained through a web browser. In order to provide access, the web address and access authorisationsmust be set up. The complete parameterisation software is filed as an HTML page on the flash memory. The open architectureof the UMG 507 allows the user to apply own ideas to design Java-Applets and Active X-components and file them on the UMG507. Iflimit value violations or events occur, they can be automatically sent to the set up e-mail address. Data from the memory storage can besent by e-mail (attachment) at preset times and processed with the GridVis software.Protocols: HTTP, SMT, UTP, DNS, NTP, MOD TCP, Modbus over TCP, DHCP/BootP.Connection to an ISDNrouter / DSL routerThe unit can be connected to the internet using an external router (e.g. ISDN router or DSL router).The SMTP authentication enables you to store mails on the internet provider’s mailbox using the Plain/Login/Cram-MDS (newestencryption methods).Data collection and recordingThe UMG 507 has an internal memory of 256KB RAM and, depending on the version, an additionalmemory of 16 MB flash is available for continuousrecording of the measured data. This measurementvalue memory can be freely configuredwith reference to the measurement values whichare to be saved and the recording intervals. Inaddition, the highest and lowest actual values (200ms average time) can also be saved within theseintervals. The recording of events is prompted bytriggers. Events such as excess currents, under voltageor overvoltage can be safely collected from ahalf period duration. Events are recorded over 128periods as effective value recorders.70

UMG 507GridVis softwareThe UMG 507 power analysers already contain the GridVis software upon delivery. On one hand, this software enables simple and completeparameterisation of the respective measurement instruments and on the other hand, can analyse the measurement value memory inthe unit. In GridVis, the data is stored in a database and can be processed in MS Excel for example. GridVis also allows online presentationof the measurement values. More information is available in chapter 5 – “software”.Peak demand management (Emax)The release of the Emax function for peak demand management is available as an option. More information can be found in chapter 3 –energy management.Embedded web server / e-mailWorldwide access to the UMG 507 can be gained through a web browser. In order to provide access, the web address and access authorisationsmust be set up. The complete parameterisation software is filed as an HTML page on the flash memory. The open architectureof the UMG 507 allows the user to apply own ideas to design Java-Applets and Active X-components and file them on the UMG507. Iflimit value violations or events occur, they can be automatically sent to the set up e-mail address. Data from the memory storage can besent by e-mail (attachment) at preset times and processed with the GridVis software.Protocols: HTTP, SMT, UTP, DNS, NTP, MOD TCP, Modbus over TCP, DHCP/BootP.Connection to an ISDNrouter / DSL routerThe unit can be connected to the internet using an external router (e.g. ISDN router or DSL router).The SMTP authentication enables you to store mails on the internet provider’s mailbox using the Plain/Login/Cram-MDS (newestencryption methods).Data collection and recordingThe UMG 507 has an internal memory of 256KB RAM and, depending on the version, an additionalmemory of 16 MB flash is available for continuousrecording of the measured data. This measurementvalue memory can be freely configuredwith reference to the measurement values whichare to be saved and the recording intervals. Inaddition, the highest and lowest actual values (200ms average time) can also be saved within theseintervals. The recording of events is prompted bytriggers. Events such as excess currents, under voltageor overvoltage can be safely collected from ahalf period duration. Events are recorded over 128periods as effective value recorders.70

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