Related Manuals for Mega Meg39
Summary of Contents for Mega Meg39
- Page 1 PQ monitor MEg39 User manual Měřící Energetické Aparáty, a.s. 664 31 Česká 390 Czech Republic...
- Page 3 PQ monitor MEg39 INTRODUCTION PQ monitor MEg39 measures four voltage and four current values at LV, MV, HV levels. It provides the functions of recording, electricity meter and analysis of voltage quality, all performed simultaneously. In the recording function, PQ monitor MEg39, hereinafter referred to as the monitor, processes all measured values, evaluates powers, energy and harmonics up to the order of 64.
- Page 4 [3]. BASIC INFORMATION ON MONITOR MEg39 PQ monitor MEg39, Fig.1, is designed for fixed mounting in LV, MV and HV networks. The MEg39 unit is installed in a polycarbonate self-extinguishing box with the dimensi- ons of 108 ×...
- Page 5 PQ monitor MEg39 – user manual Fig. 1 – Designation of elements of PQ monitor MEg39 – description in Table 1 16 17 18 Tab. 1: Description of device components Item Name Description Voltage Terminals for connecting signals of the secondary windings of...
- Page 6 Měřící Energetické Aparáty Item Name Description RJ45 ETHERNET 100BaseTx interface connector for connecting in connector local network. • The green LINK_LED signalizes data line speed (lit 100 Mbit/s / not lit 10 Mbit/s) • The orange ACTIVITY_LED light signalizes a data trans- mission in progress Status Short flashing –...
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Page 7: Safety Information
• Attention! Operating personnel performing installation of the device into cir- cuits with live parts must be equipped with and use during installation perso- nal protective means and other safety equipment. • Any use of PQ monitor MEg39 in a way for which it has not been designed by the manufacturer can impair the protection provided by the PQ monitor MEg39. • Personnel performing installation of the device must be qualified for work under and near hazardous voltage. - Page 8 Měřící Energetické Aparáty Caution The meaning of symbols used in the user manual and in descriptions of the PQ monitor MEg39: Note in documentation / Warning, risk of danger Warning, electric shock hazard CAT III Overvoltage category, characterizing the state of temporary overvoltage.
- Page 9 PQ monitor MEg39 – user manual Fig. 3: Design of rating plate for measurements at the MV and HV voltage level MEg39/cl. A Made in Czech Republic U 100V~ P-P, U 300V~ P-N I 1A, I 1.2A 90 230V~ 10%,50Hz, 8VA/4W ÷...
- Page 10 Měřící Energetické Aparáty Fig. 4: Three-phase measuring of line to line voltages and phase currents in MV and HV voltage with earthed center (U/100/ (U/100/ Positive direction of energy flow (U/100/...
- Page 11 PQ monitor MEg39 – user manual Fig. 5: Measurement of line to line voltages, U0 voltage, phase currents, I0 current in a compensated MV network (U/100/ (U/100/ Positive direction of energy flow (U/100/ (U/100/3)V...
- Page 12 Měřící Energetické Aparáty Fig. 6: Measurement of line to line voltages and phase currents in the Aron connection at the MV network Positive direction of energy flow...
- Page 13 PQ monitor MEg39 – user manual Fig. 7: Measurement of phase voltages, voltage between neutral conductor and ground and phase currents including phase currents difference Positive direction of energy flow...
- Page 14 Měřící Energetické Aparáty Fig. 8: Three-phase measurement of voltage and current at the LV output and measure- ment of phase voltage and current of another LV output Positive direction of energy flow...
- Page 15 30V 1A RS485 RS232 U1 U2 U3 250V/2A antenna 80230VAC, 50Hz 90300VDC Tab. 2: Description of the function of MEg39 terminals Terminal number Function I1 current input I1 current output I2 current input I2 current output I3 current input I3 current output...
- Page 16 Měřící Energetické Aparáty Terminal number Function I4 current input I4 current output L (power supply) N (power supply) RS232 GND RS232 Tx (DTE) RS232 Rx (DTE) RS485 B (negative idle level of signal) RS485 A (positive idle level of signal) IN_GND...
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Page 17: Measured Data
PQ monitor MEg39 – user manual MEASURED DATA The range of measured data depends on connection for measurement and measurement parameterization. Measured data are divided into data of continuous phenomena of vol- tage quality, event data and recorder data. Data of continuous phenomena of voltage quality (aggregation interval 10 min):... - Page 18 Měřící Energetické Aparáty Recorder data (aggregation interval from 1 s to ¼ h pursuant to measuring parameteri- zation): - Time of evaluation - Voltage - Currents - Active powers - Reactive powers - PF - THD - THD - Harmonic components of voltages up to the order of 64. - Harmonic components of currents up to the order of 64.
- Page 19 90 V to 230 V or DC voltage from 100 V to 300 V, independent on polarity. 1. Terminals 16 and 18 of the monitor MEg39 are connected via the two-pole LV fuse disconnector with fuses 2 A / 500 V to the terminals L and N of the network and their connection is made with cables certified for installation in a LV cabinet.
- Page 20 I1, I2, I3 and I4, as the case may be, of the monitor MEg39 according to Fig. 4 to Fig. 8. The secon- dary winding of the current transformer inserted in the L1 phase is connected to...
- Page 21 PQ monitor MEg39 – user manual To ensure a reliable function of the connection, it is recommended to earth the secondary circuit of each instrument transformer. Earthing of the secondary circuit is carried out at one point. Start of measurements and check of correct wiring 6.
- Page 22 Měřící Energetické Aparáty Fig. 10: The main window of SW PQ when communication with MEg39 has been established Fig. 11: The main window of SW PQ when communication with MEg39 has not been successfully established...
- Page 23 PQ monitor MEg39 – user manual Fig. 12: An example of settings - measurement parameterization Fig. 13: Measuring and inspection of connected values, a time course of effective values...
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Page 24: Maintenance
• Re-calibration of PQ monitors MEg39 class A is recommended every two years and PQ monitors MEg39 class S every three years from the date of purchase or previous calibration. When used properly and in accordance with this manual, the monitor does not require any special maintenance. -
Page 25: Warranty
ORDERINg An order must contain quantity of PQ monitors MEg39, class A or S, requiren nominal voltage level (LV or MV/HV) and required nominal current range (1 A or 5 A). Optional accessories: •... -
Page 26: Technical Parameters
Měřící Energetické Aparáty TEChNICAL PARAMETERS General information The stated uncertainties of measurement apply to the reference conditions. The development and production of the monitor is in accordance with the standard of ISO 9001. Reference conditions Ambient temperature: 23 °C ± 2 K Relative humidity: 40 % to 60 % Left-direction voltage system at the inputs U1, U2 and U3. - Page 27 PQ monitor MEg39 – user manual EN 61326-1:2006 Electrical equipment for measurement, control and laboratory use – EMC requirements Part 1: General requirements 31 Voltage on network terminals, electromagnetic interference EN 55011 ed.3:2010 Industrial, scientific and medical equipment – Radio-frequency disturbance characteris- tics –...
- Page 28 Měřící Energetické Aparáty Measuring characteristics A/D convertor: 16 bit Sampling frequency: 256 samples a period Antialiasing filter: digital filter of the FIR type Phase lock: controlled by passage of basic harmonic voltage U1 through zero Aggregation intervals: quality function – pursuant to the standard of EN 61000-4-30, ed. 2 recorder function –...
- Page 29 PQ monitor MEg39 – user manual Uncertainties of measurement and measuring parameters of voltage quality in the testing states 1, 2, 3 according to the standard EN 61000-4-30, ed. 2 LV, MV, HV level, f = 50 Hz Parameter Class Uncertainty Measuring range Frequency ± 2 mHz 42.5 Hz – 57.5 Hz Voltage ± 0.1 % U 10 % U – 150 % U...
- Page 30 Měřící Energetické Aparáty REFERENCES [1] User description of SW PQ, www.e-mega.cz [2] User description of Data Viewer, www.e-mega.cz [3] User description of WebDatOr, www.e-mega.cz MANUFACTURER MEgA – Měřící Energetické Aparáty, a.s. 664 31 Česká 390, Czech Republic Tel. +420 545 214 988 e-mail: mega@e-mega.cz...
- Page 32 PQ monitor MEg39 User manual Měřící Energetické Aparáty, a.s. 664 31 Česká 390 Czech Republic www.e-mega.cz Edition: 2/2014...
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