PQ monitor MEg38/C – User manual
Contents
1. 12VA 450 Ns UPS operation time 1 min SW selectable also multiple repetitions Fuse type FSK 00 1 500 mA T only the manufacturer or service firms trained by the manufacturer may replace the fuses 41 MESA M c Energetick Apar ty Data memory Capacity 128 MB NAND Memory organisation circular Example of a recording range in a three phase network 20 guality 8 recorder 52 events 20 reserve Note quality 52 days 18 hours events at least 322 with duration 3 sec voltage Ums current I recording interval 10 sec RMS1 2 oscillographic recording of voltages and currents recording interval 1 sec recorder 51 days 0 hours we 53d 18 40c00 BB 514 0 00 06 B 322 214 eeg ek cancel It is applicable for quality data of U1 U2 U3 and I1 I2 I3 for recorder data of U1 U2 U3 U4 and I1 I2 I3 I4 The functions use the reserve part of the memory after the area defined for them was filled up Measuring characteristics Sampling frequency 256 samples per period Antialiasing filter digital FIR filter Phase locked loop controlled by the fundamental voltage harmonic U1 passing through zero Aggregation intervals quality function according to EN 61000 4 30 ed 2 recorder function from 1 sec to 4 hour Aggregation synchronisation according to EN 61000 4 30 ed 2 Time base GPS synchronisation 10 ms A2 without GPS synchronisation 1 sec pe2. M PQ monitor MEg38 C User manual M c Energetick Apar ty a s 664 31 esk 390 Czech Republic PQ monitor MEg38 C User manual MESA PQ monitor MEg38 C INTRODUCTION The PQ monitor MEg38 C measures four voltages and four currents on the LV MV and HV level It realizes a recording function and a voltage quality analysis function that are performed simultaneously In the recording function the PQ monitor MEg38 C hereinafter monitor processes all of the measured quantities evaluates powers energies and harmonics up to order 64 In the voltage quality analysis function of class A it eva luates all parameters specified by the standard for the measured three voltages and three currents It evaluates harmonics and centred groups of interharmonics up to order 125 While recording events it records not only the course of U ie and 7 7 but it makes also an oscillographic recording of all four voltages and currents Ihe user SW working above the recording function can evaluate the size of the capacitive compensation battery and specifies the circuit breaker value It measures characteristics of appliances in con nection with the three phase and single phase load adapter Ihe monitor can work as an oscillograph recording the voltages U1 U4 and the currents I1 I4 into the data memory the oscillographic recording can be started by the voltage U4 The monitor includes an uninterruptible power supply supplied from all of the
3. A I The voltage cords first N and then U1 U4 are to be connected to the measured voltages according to the measuring diagrams in Fig 9 Fig 20 If needed then crocodile clips magnetic contacts adapters or voltage extensions are to be used During the measurement the measuring cord UI of the reference channel of the monitor must be always connected to the measured voltage he LED RUN lights up according to the programmed measurement mode see Tab 4 The LEDs U1 U2 U3 and U4 light up according to voltages in the way specified in Tab 4 CONNECTING THE CURRENTS AND CHECK OF CORRECT WIRING AN Warning The current sensors AMOSm MEg38 and clamp on transformers MT MEg38 are allowed to be installed only in circuits with the overvoltage category specified in Tab 1 Even if only the top insulation layer of the sensing part of the flexible sensor AMOSm MEg38 is mechanically damaged which can prove with a contrast change of the surface colour of the sensor the sensor must be immediately removed and sent for repair The current sensors are intended only for installation on insulated live parts When the current sensors are installed in space with dangerous voltages it is necessa ry so that the operator is provided with protective equipment against electric shock When the current sensors must be installed on live parts or in space with dange rous voltages it is necessary to perform its installation in deenergized stat
4. The flexible current sensors AMOSm MEg38 are intended for measurement on LV level The clamp on transformers MT MEg38 are made in two accuracy classes For measure ments in LV MV or HV level are intended sensors MT0 5 MEg38 CAT IV 300V and mainly for MV or HV level and measurement in secondary circuits are intended sensors MT1 0 MEg38 CATIII 300 V Tab 5 Permissible connections of the sensor types Connections Input I1 I2 I5 of the sensor types AMOSm MEg38 MT0 5 MEg38 MT1 0 MEg38 Fig 9 Single phase voltage and current measurement with the sensor 3AMOSm MEg38 m 11 ua U ul Positive direction of energy flow I Bd E 2 T a a CA Note Note voltage inputs U2 and U3 can be connected to phase voltage L1 then they participate on power supplying of device or they can be connected to PEN conductor and measure zero voltage MESA M c Energetick Apar ty Fig 10 Single phase voltage measurement and direct current measurement with the clamp on transformer 3MT0 5 MEg38 Positive direction UF U Ul of energy Fig 11 Single phase voltage and current measurement and neutral conductor voltage measurement to ground and neutral conductor current measurement 11 ui L1 Positive i n direction of energy ua flow d PQ monitor MEg38 C User manual MESA Fig 12 Three phase voltage and three phase current measurement with the sensors 3AMOSm MEg38 Positi
5. Working temperature 10 C to 55 C Relative humidity lt 85 Dimensions 135x51x35 mm Max diameter of measured conductor 20mm Weight 2kg D Class I according to EN 61000 4 7 ed 2 45 MESA M c Energetick Apar ty LITERATURE 1 User description of the program SW PO www e mega cz 2 User description of the program Data viewer www e mega cz 3 User description of the program WebDatOr www e mega cz MANUFACTURER MEgA M c Energetick Apar ty a s 664 31 esk 390 Czech Republic Tel 420 545 214 988 e mail mega e mega cz web www e mega cz A6 PQ monitor MEg38 C User manual M c Energetick Apar ty a s 664 31 esk 390 Czech Republic www e mega cz
6. c Energetick Apar ty A N SAFETY INFORMATION It is necessary to pay close attention to these information The warning points out facts which represent safety risks for the operator The cautions specify conditions and facts which can damage the monitor Warning e Watch out The operator installing the current sensors on live parts must be equipped with protective and other safety equipment and must use them du ring the installation e When the PO monitor MEg38 C is used in a different way than it is specified by the manufacturer the protection provided by the PQ monitor MEg38 C can be impaired The operators installing and removing components of the PQ monitor set must be qualified for live line working and working near dangerous voltages They must be as well trained for the first aid treatment The monitor may be operated only by qualified persons provided with protective equipment against electric shock t is not allowed to connect voltage measuring cords to phase voltages higher than 450 Vie and line to line voltages higher than 780 Va otherwise there is a risk of electric shock e In LV networks between MV LV transformers and energy meters of customers cha racterized by the overvoltage category CATIV it is not allowed to connect the moni tor to phase voltages higher than 300 Vics otherwise there is a risk of electric shock e When the top insulation layer of the sensing part of the flexible sensor alone
7. voltage inputs are left unconnected then their voltage is not defined due to their high input resistance and the voltage channel connection The monitor is supplied from the measured voltages When the power of the instrument transformer is higher than or equals 30 VA then the measurement is not influenced due to its loading During measurement on the MV level and the voltage input U4 is not used it is recom mended to connect the AC supply voltage 230V or the DC supply voltage 220 V pe or eventually 110 V c to this input For measurement on the LV level the monitor set includes load adapters which can be used for measuring parameters of single phase or three phase appliances including harmonics and oscillographic recordings during the turning on and off For the phase voltage measurement in a LV single phase plug socket the LV adapter can be used Versions of the sensors AMOSm MEg38 a MT MEg38 cannot be confused during the installation and the sensor types AMOSm MEg38 MT0 5 MEg38 and MT1 0 MEg38 are automatically identified by SW The identification is executed when the measurement is started and when the measurement is restored after a power outage and therefore it is not allowed to change the types of installed sensors in the course of the measurement For measurement of the currents I1 I2 I3 and the current I4 it is allowed to use only current sensors of the same type see Tab 5 18 PQ monitor MEg38 C User manual MESA
8. direction of energy flow 25 MESA M c Energetick Apar ty Fig 20 Measurement in the Aron connection on the MV level with connected GPRS communication ang GPS time synchronization L1 A ul L2 en JE L3 Positive my direction i of energy flow 26 PQ monitor MEg38 C User manual MESA MEASURED DATA The amount of measured data depends on the measuring connection and parameteriza tion of the measurement The measured data are divided into data of continuous voltage quality phenomenona data of one time voltage events and recorder data Data of continuous voltage quality phenomenona aggregation interval 10 min Time period of evaluation Voltage unbalance Frequency Voltage Voltage deviations V Flicker p and Po THD DC component basic up to 125 voltage harmonic Centred groups of interharmonic voltages up to order 125 Voltage signals level Identification of flagged values Currents Basic up to 125 current harmonic Centred groups of interharmonic currents up to order 125 Data of one time voltage events Event occurrence time A Event duration time Times when limits of interruption voltage and current dips and swells were exceeded Residual and maximum voltages and currents Time courses of voltage values U ys and current values I ys Oscillogram of voltage and current waveforms during the event Voltage and current h
9. four me asured voltage inputs For the current measurement it uses flexible sensors or current clamps that it identifies automatically Its ranges are changed by SW For time synchro nisation which is required in calss A it is possible to connec GPS Monitor allows remo te transfer of measured data and remote parameterisation using GPRS service of GSM network Monitor is designed in an all plastic case with minimum dimensions it is waterproof it has increased insulation and CATIV INFORMATION ABOUT SW The PQ monitor MEg38 C includes CD with user software The program SW PQ is used for parameterization of measurement download of measured data and it displays the direct measurement including the oscillographic record For displaying and evalua tion of the measured data in graphical and tabular form in a single data file export of measured data and the print task is the unified software Data Viewer Functions of the individual programs are specified in separate user manuals 1 2 To analyse more data files of one or more instruments even of various types the program WebDatOr is prepared that is delivered separately 3 MESA M c Energetick Apar ty BASIC INFORMATION ABOUT THE SET MEg38 C Ihe PO monitor MEg38 C set includes the MEg38 C monitor unit in Fig 1 with uninterruptible power supply and current sensors in three versions The flexible sensors AMOSm MEg38 in Fig 2 are intended for LV measurements Clamp on trans
10. is me chanically damaged which can prove with a contrast change of the surface colour of the sensing part or when the monitor or its accessories are damaged the damaged part must be immediately removed and sent for repair Only the manufacturer or service firms trained by the manufacturer may service and repair the monitors Because of loss of waterproofness and moisture resistance the monitor unit must not be opened PQ monitor MEg38 C User manual MESA Because of loss of waterproofness and moisture resistance properly tightened current sensors and antennas must be connected to the connectors or the connectors must be covered with caps The operator must ensure the protection of monitor against water during the local parameterization or download of measured data The load adapters voltage extensions and the LV adapter may be used only in cove red rooms not exposed to water and moisture Other accessories than included in the monitor set delivery are not allowed to be used The current sensors adapters and voltage extensions are to be connected to the mo nitor first and only then to the measured circuits Tab 1 Overvoltage category of components of the set MEg38 C Current sensors and contact elements Application area Clamp on transformer MT0 5 MEg38 CATIV 300V Clamp on transformer MT1 0 MEg38 CATIII 300V Flexible sensor AMOSm MEg38 CATIV 300V Crocodile clips CATII 1000V Grips with fuses CATIII 1
11. sation then clicking its pictogram button displays in baragra ph intensity of signal in given point Lowest signal is presented by shortest bar In displayed example is intensity on second level Date and time below GPS label shows time when last GPS syn chronisation occured 13 In case of insufficient GPS signal in place of measurement it is possible to bring powered on monitor with GPS antenna into space with sufficient signal and here let the internal clock synchronize During time synchronization which may not occur during one minute period of secured power supply operation it is needed to ensure mains power supply of monitor After synchronisation monitor supplied from its own internal uninterruptible power supply is to be returned back to measurement place and connected to measured voltages and currents This way is internal clock synchronized at least on start of measurement Fig 21 Main SW PQ window when the communication with MEg38 C is established a A Er mam SE pom BRE Har RT af dais o ato ir proe i Y m mi TA wari 5 5 Thi FA vappeers FA te ergon Ege LF BMBMEXTS 0 15 lin emet ingre RCRA TOR GD EDD nar comes gt e 34 MESA Fig 22 Main SW PQ window when the communication with MEg38 C was not established PQ monitor MEg38 C User manual TA verska f 31 D This SW supports FW tp version MES EH LGF MESI 0 15 Fig 23 Example of the monitor setting for the single pha
12. 000 V Magnetic contacts CATIII 1000V Load adapter Z MEg38 CATII 250V Load adapter 3Z MEg38 CATII 415V LV adapter CATII 600V Voltage extensions with banana plugs CATII 600V he current sensors AMOSm MEg38 and MT MEg38 may be installed only on insulated parts of conductors When the current sensors are to be installed on an uninsulated part they may be installed only into circuits of the overvoltage cate gory according to Tab 1 that are off during the installation When the sensors are installed into environment with dangerous voltages it is necessary to use protective equipment and meet safety requirements applicable for the given network MESA M c Energetick Apar ty Tab 2 Waterproofness of components of the set MEg38 C Re traen Unit MEg38 C Flexible current sensors AMOSm MEg38 Clamp on current transformers MT MEg38 Load adapters Z MEg38 LV adapter Voltage extensions with banana plugs Crocodile clips grips and magnetic contacts Caution The meaning of symbols used in the user manual and in descriptions of components of the PQ monitor MEg38 C set A Note in the documentation Warning risk of danger A Warning risk of electric shock Do not attach around uninsulated dangerous live wires that can cause electric shock burns or arc discharge Attaching around uninsulated hazardous live conductors allowed CAT IV Overvoltage category characterizing a transient overvoltage condition General
13. 3PV 38 EMSW 38 T MEg38 Monitor class S has connectors and indication elements located on one side see Fig 1 Monitor class A uses for connection of GPS and GSM antennas connectors located on the other side of unit 12 PQ monitor MEg38 C User manual MESA Tab 4 User elements Voltage inputs with power supply 2 Connector of current inputs I1 I2 I3 Connector of current input I4 Connected measuring cords U1 U2 U3 U4 and N long 1 m and ended with banana plugs CATIV which are power cords as well The maximum voltage between the cord N and the cords UI U2 U3 U4 is 450 V Connector for connecting the triple of current sensors I1 I2 3 The current sensors can be the flexible 3AMOSm MEg38 see Fig 2 or the current clamps 3MT MEg38 see Fig 3 The connected sensor type is identified automatically when the measurement is parameterized Only identical sensor types may be used on the current in put I1 I2 I3 and I4 of the monitor SW check distinguishes AMOSm MEg38 MT0 5 MEg38 and MT1 0 MEg38 Only identical nominal current values may be set by the program on the current input I1 I2 I3 Nominal current value on input I1 I2 I3 can be different than nominal current value on I4 input SW settings of the nominal current values 3AMOSm MEg38 100A 300A 1000A 3000 A 3MT0 5 MEg38 1A 5A 3MT1 0 MEg38 1A 5 A Connector for connecting the current sensor I4 The curr
14. afe terminals Otherwise the voltage cords of the monitor are to be installed either using crocodile clips or grips with fuses or magnetic contacts When connecting GPS and GSM antennas which have equivalent connector it is necessary to pay attention to its correct connection When antennas are not used then connector must be properly tightened with caps in order to ensure waterproof ness 29 MESA M c Energetick Apar ty During local parameterization of measurement and download of data using com munication cable USBmini EMC the operator must ensure the protection against water on the connector in a different manner For current measurements identical types of the current sensors either the flexible sensors AMOSm MEg38 or the clamp on transformers MT0 5 MEg38 or clamp on transfor mers MT1 0 MEg38 are to be connected to the current connector I1 I2 I3 and eventu ally to the current connector I4 The connector nuts or caps are to be properly tightened If the currents are not measured the connector caps are to be properly screwed on one or both of the current connectors In LV networks are usualy connected to current inputs I1 I2 I3 and I4 flexible current sensors AMOSm MEg38 with the nominal value 100 A 300A 1000A and 3 000A For measurement of currents with nominal values 1 A or 5A are also in LV networks intended current clamps MT0 5 MEg38 in overvoltage category CATIV 300V and current clamps MT1 0 MEg38 in ove
15. armonics during the event 27 MESA Recorder data aggregation interval from 1 sec to 4 hour according to the measurement ggreg 8 parameterization Time period of evaluation Voltages Currents Active powers Reactive powers Apparent powers PF M c Energetick Apar ty Active and reactive energies four guadrants 6 registers for each phase Distortion powers Unbalance power Active powers of 1 harmonics Reactive powers of 1 harmonics Apparent powers of 1 harmonics Cos Active and reactive energies of 1 harmonic 4 quadrants 6 registers fo each phase THD U THD I Voltage harmonics up to order 64 Current harmonics up to order 64 Active and reactive energy 6 registers for a phase The above mentioned data of the continuous voltage quality phenomenons are specified for the voltages U1 U2 U3 and the currents I1 I2 I3 The above mentioned data of the recording of one time events started from the time when the defined limits for U1 U4 and currents I1 I3 were exceeded are recorded for all given quantities The above mentioned recorder data are for the voltages U1 U4 and the currents I1 14 28 PQ monitor MEg38 C User manual MESA COMPLETION OF THE MONITOR SET PREPARATION OF THE MEASUREMENT Z Warning Ihe maximum connected phase voltages may be 450 V the maximum connected C deltaline to line voltages are 780 M e In the CATTV 300 V envi
16. check of connected guantities course of RMS values ni 5 nn STEH nn aan mic COE LC manna Fi Lrsr LAA ig BIIP a xen am Mera eina ERA ME MN PR Fira vmi FEJ arkaa aj He FIT k m a K l iach P r F 2 ERA num rt re DEF amka M dein a is ai CR aain Leda a run 36 PQ monitor MEg38 C User manual MESA Fig 26 Measurement and check of connected quantities oscillographic waveforms and FFT OLAT T j Na db dd ams AE uh 1 4 amp 7 iH 1 TT idp TEETE r a Fig 27 Example of main window with information about intensity of GPS and GSM signals e FET pipt a peer aeiae mys u by PET 37 MESA M c Energetick Apar ty MAINTENANCE A Caution e Only trained and qualified personnel of the manufacturer or service organisation of the manufacturer may repair the monitor during the guarantee period For contact to the manufacturer s service department see www e mega cz The monitor must not be exposed to chemicals The monitor may be transported only in the original transport bags or cases delivered by the manufacturer The PQ monitors MEg38 C of class A are recalibrated every 2 years and the PQ mo nitors MEg38 C of class S always every 3 years after the sale or the last calibration When the monitor is used properly in accordance with this manual it does not require any special maintenance Only when the instrument is unclean i
17. construction defective design or improper materials will be repaired by the manufacturer or a service firm of the manufacturer free of charge The guarantee becomes invalid also during the guarantee period if the user carries out unauthorized modifications or changes on the monitor MEg38 C connects the instru ment incorrectly handles it incorrectly or roughly or the instrument is operated contrary to the technical specification Defects of the monitor and its accessories incurred during the guarantee period shall be claimed by the user to the manufacturer or the service firm authorised by the manufactu rer In case of a guarantee and after guarantee failure it is useful to deliver also a description of the failure behaviour with the defective instrument 39 MESA M c Energetick Apar ty TECHNICAL PARAMETERS General data The measurement uncertainties are applicable for reference conditions The monitor development and production is in accordance with ISO 9001 Reference conditions Ambient temperature 209 EK Relative humidity 40 to 60 96 There is a left rotating voltage system on the inputs U1 U2 and U3 Power supply through the input U4 by a voltage higher than the calibrated voltages on the inputs U1 U2 and U3 Working conditions Operating temperature 20 C to 55 C Stabilization time 10 minutes after the power is turned on Relative humidity 10 to 90 no condensation Storage Storage temperat
18. d The me asured voltages are supply voltages as well Ihe maximum voltage on the voltage inputs UI U2 U3 and U4 towards N is 450 Miss Ihe flexible current sensors AMOSm MEg38 with the nominal value 100A 300A 1000 A and 30004 are connected to the current inputs I1 I2 I3 and I4 usualy in LV networks MESA M c Energetick Apar ty For measurement of currents with nominal value 1 A and 5 A usualy in secondary circuits of instrument current transformers but also for measurement in LV circuits are designa ted current clamps MT0 5 MEg38 Current clamps MT1 0 MEg38 are designated for measurement of current with nominal value 1 A 5A in secondary circuits of instrument transformers or LV circuits of measurement category CAT III AA The current sensors AMOSm MEg38 and MT MEg38 may be installed only on insula ted parts of conductors When the current sensors are to be installed on an uninsulated part they may be installed only into circuits of the overvoltage category according to Tab 1 that are off during the installation When the sensors are installed into environ ments with dangerous voltages it is necessary to use protective equipment and meet safety requirements applicable for the given network The measuring range of the current sensors is up to 1 21 AA In the network environment with the overvoltage category CAT IV the voltage can be measured only up to 300 V The IP65 protection of the monitor is ensured when t
19. e without voltage and meet safety requirements and regulations applicable in the respective distribution network 31 MESA M c Energetick Apar ty If the currents are not measured the connector caps are to be properly screwed on both of the current connectors e When the clamp on current transformers MT MEg38 are used the monitor oper ator must ensure the protection against water on the sensing part of the clamp on sensors MT MEg38 in a different way AN 5 32 The current sensors are to be installed on the wires with the measured current so that their arrows show the direction of current flow to the load On PC with the running program SW PQ see Fig 21 there is a pictogram of the established communication with the monitor FW version and serial number displa yed in the dropdown menu on the right side of window Labels of all buttons of the window are in bold When the program SW PQ is running and the monitor is not connected to PC or is connected incorrectly the window will be displayed with an empty field confirming the communication and the buttons labels will not be in bold see Fig 22 The bold button Settings MEg opens measurement parameterization and the sing le phase or three phase measurement voltage level type and conversion ratio of the current sensors and possibly other parameters of the measurement are to be selected according to the measuring diagram Fig 23 shows an example of parameteriza
20. ed 1 blue 1 black K 38 Transport bag with filling B 38 CD with user manuals for the monitor CD 38 user program SW MEg38 user program Data Viewer and the calibration certificate 11 MESA Components of the optional accessories GPS and GPRS functionality for PQ monitor Meg38 C class S Triple of flexible current sensors 3AMOSm MEg38 I1 I2 I3 40cm 100A 300A 1000A 3000A Flexible current sensor AMOSm MEg38 I4 40cm 100A 300A 1000A 3000A Triple of clamp on current transformers 3MT0 5 MEg38 1 12 13 accuracy class 0 5 1A 5A Clamp on current transformer MT0 5 MEg38 I4 accuracy class 0 5 1A 5 A Triple of clamp on current transformers 3MT1 0 MEg38 I1 I2 I3 accuracy class 0 5 1A 5 A Clamp on current transformer MT1 0 MEg38 I4 accuracy class 0 5 1A 5 A Single phase load adapter Z MEg38 Three phase load adapter 3Z MEg38 Set of grips with fuses CAT III 3 red 2 black Set of magnetic contacts 07 mm L 10 mm 3 red 1 blue 1 black Set of magnetic contacts 11 mm L35 mm 3 red 1 blue 1 black Three phase voltage extension with banana plugs 2 m Three phase voltage extension with free ends 2 m SW for electric installation circuit breaker value compensation capacity value Transport leatherette case M c Energetick Apar ty Identification 3AMOSm 38 AMOSm 38 3MT0 5 38 MT0 5 38 3MT1 0 38 MT1 0 38 Z 38 37 38 G 38 M7 38 M11 38 3PB 38
21. ent sensor can be the flexible sensor AMOSm MEg38 or the clamp on transformer MT MEg38 The connected sensor type is identified automatically when the measurement is parameterized Only identical sensor types may be used on the current input I4 and the input I1 I2 I3 SW check distinguishes AMOSm MEg38 MT0 5 MEg38 and MT1 0 MEg38 The nominal current value on the input I4 may differ from the nominal current value on the input I1 I2 I3 SW settings of the nominal value AMOSm MEg38 100A 300A 1000A 3000 A MT0 5 MEg38 1A 5A MT1 0 MEg38 1A 5A MESA M c Energetick Apar ty Mini USB Connector MM the galvanically isolated communication connector USB 2 0 3 Mbit s RUN LED Shortly intermittent lighting the monitor measures accor condition ding to the programmed parametrization Repeated short flashing the monitor is programmed but it does not measure because the preset time of the measure ment start has not occurred yet or the power supply has not been turned on because the measurement was programmed with a postponed start Alternate lighting 1 1 oscillographic recording Condition Indication of voltage conditions on the inputs U1 U2 U3 of measured and U4 during the LV measurement star connection or voltages U1 U2 U2 U3 U3 U1 during the MV measurement tri U1 U2 U3 angle connection U4 Lighting continuous the voltage is in the predefined tolerance zone 0 9U t
22. formers are delivered in two precisions of measurement MT0 5 MEg38 in Fig 3a has preci sion of current measurement 0 5 I_ and are intended for measurement in secondary circuits of instrument transformers and also for LV measurement in category CAT IV MT1 0 MEg38 in Fig 3b has precision 1 0 I_ and can be used for measurements in secondary circuits of instrument transformers and for LV measurements in category CAT III MT1 0 MEg38 has smaller outer dimensions with bigger inner diameter for easier installation to measured circuit The single phase and three phase load adapter can be used for testing of electrical appli ances see Fig 4 and 5 For connection of monitor to voltages in large switchgears are intended voltage extensi ons and the LV adapter for a single phase socket Fig 6 and 7 Optional accessories in the set are also magnetic contacts voltage extensions grips with fuses and an adapter for voltage measurements in a single phase LV plug socket Fig 1 PQ monitor MEg38 C basic dimensions and user elements a VR TAE ur LZ UD Uu Wm 00 n PQ monitor MEg38 C User manual Fig 2 Triple of flexible current sensors 3AMOSm MEg38 MESA M c Energetick Apar ty Fig 4 Three phase load adapter 3Z MEg38 Fig 5 Single phase load adapter Z MEg38 PQ monitor MEg38 C User manual MESA Fig 6 Voltage extensions 135 Fig 7 LV adapter MESA M
23. he caps of the USB connector con nector I1 I2 I3 connector I4 and with A version also antenna connectors are properly tightened or the current sensors and antennas are properly tightened When using current sensors MT MEg38 voltage extensions load adapters and the LV adapter designated for installation only in covered rooms the operator of the monitor must ensure the protection against water in a different manner Also during local parameterization of measurement and download of data using commu nication cable USBmini EMC the operator must ensure the protection against water on the connector in a different manner The PQ monitor MEg38 C set is calibrated with the current sensors whose serial numbers are stated in the bottom part of the rating plate Ihe measurement accuracy specified in the technical specification is guaranteed only in this set 16 PQ monitor MEg38 C User manual MESA A CHARACTERISTICS OF THE MONITOR DESIGN The square shape monitor unit of the safety class II with indication elements and con nectors on the narrow front side is designed with an optimum rectangular format in the completed assembly for uncluttered installation into energetics switchgears Plastic insulating and self extinguishing case of the monitor unit and non conducting surface of components of the set The waterproof and dustproof design of the monitor case with waterproof current con nectors when current sensors are installed or covered b
24. ly a LV network from the transformer station to fuses at the electricity meter CAT Ill Overvoltage category characterizing a transient overvoltage condition Ge nerally a LV installation in buildings behind fuses of the electricitymeter Safety class II double or increased insulation GND grounding terminal jim IPcode Ingress protection rating The product is designated for recycling and for collection points Declaration of conformity European Community s c m Po PQ monitor MEg38 C User manual MESA A LN The maximum voltage to the common wire may be 450 V and the maximum line to line voltage is 780 V otherwise there is a risk of a monitor fault In the CATIV 300 V environments the maximum voltage to the common wire may be 300 V otherwise there is a risk of a monitor fault Because of loss of waterproofness and moisture resistance the monitor unit must not be opened Because of loss of waterproofness and moisture resistance there must be connected ap propriate components current sensors antennas or the connectors must be covered with caps The operator must ensure the protection against water during loacal parameterization or data download Tab 3 Basic set and optional accessories of the monitor set PQ monitor unit MEg38 C class A A 38 PQ monitor unit MEg38 C class S S 38 Communication USBmini EMC cable USB 38 LV adapter for measuring in a LV plug socket NN 38 Set of crocodile clips 3 r
25. nnecting to moni tor unit 10 Antenna of the GSM network with GPRS function is to be installed into space with sufficient intensity of signal Insulation protective tube of GSM antenna with mag netic holders is to be installed preferably in vertical position 11 GPS antenna must be installed in space with direct visibility to sky For time syn chronisation of monitor is needed to receive signal from three satelites and therefore insulation rounded cover of GPS antenna is usualy placed in horizontal position on window ledge with sufficient visibility to sky 12 In main window of SW PQ are pictograms of GPRS and GPS see Fig 27 Meaning and use of pictograms o d Device supports GPRS function of GSM network and GPS synchro iu nisation but signal is insufficient 4 Device supports GPRS function of GSM network and GPS synchro nisation but signal from satellites of GPS system is insufficient Device supports GPRS function of GSM network and GPS synchro i J kail d ig nisation but signal for GPRS communication is insufficient In case of sufficient signal intensity of GSM network with GPRS function then clicking its pictogram button displays in baragra ph intensity of signal in given point Lowest signal is presented by shortest bar In displayed example is intensity on third level 33 M c Energetick Apar ty In case of sufficient intensity of GPS signal for time synchroni
26. o 1 1U one flashing the voltage is in the predefined interruption zone two flashings the voltage is in the predefined dip zone three flashings the voltage is in the predefined increase zone 14 PQ monitor MEg38 C User manual MESA Fig 8 Rating plate of the PQ monitor MEg38 C SUPPLY 57 7V 400V 310 50Hz 5VA 52V BVA 230V 12VA 440V Voltage inputs U1 U2 U3 U4 Unomiv 230V L N Unommy 100V L L Measuring range 440V Current inputs I1 I2 13 14 AMOSm MEg38 Ino 100A 300A 1000A 3000A MTO 5 MEg38 Inom 1A 5A MT1 0 MEg38 Inom 1A 5A Measuring range 1 2 nom CC fo M X crn 300v P65 MEg38 C AMOSm MEg38 MT0 5 MEg38 MT1 5 MEg38 Nr Explanatory notes to the rating plate The rating plate of the monitor see Fig 8 is placed on the monitor back side In addition to the identification data of the manufacturer and of the monitor it specifies the AC sup ply voltage range from 52 V to 440 V with the frequency 50 Hz and the consumption for the nominal and limit values of the supply voltage Voltage inputs The voltages U1 U2 U3 and U4 are measured to the input N on the LV level the nomi nal value is 230 V The line to line voltages U1 U2 U2 U3 and U3 UI with the nominal value 100 V are measured on the MV level the voltage U4 is measured to the input N with the nominal value 100 N3 V The LV or MV measurement is selected when the measurement is parameterize
27. on of measurement accuracy of the monitor set when using components with the identified serial numbers Extension of monitor set using adapters voltage extensions and contact elements allowing that the monitor can be used in various operating conditions Uninterruptible long time secured power supply unit supplied through measuring cords UI U2 U3 and U4 by AC or DC voltage of a wide range MESA M c Energetick Apar ty GPS time synchronization of internal clock and bidirectional remote transfer of data using GPRS service with class A monitor in basic configuration and optionally with class S monitor Both antennas are with insulation cover and has increased insulation of part of cable MEASURING CONNECTION Wich the monitor in LV networks the voltages are measured directly and currents can be measured directly or indirectly The measurement in MV and HV networks is indirect through instrument measuring transformers For the three phase voltage measurement the voltages U1 U2 and U3 must be connected in the left rotating direction at which the instrument is calibrated For the single phase measurement the reference input U1 must be always connected to the measured voltage Not connected voltage inputs U2 U3 and U4 can be also connected to the measured voltage and then they participate in the monitor power supply or can be connected to the central wire N or PEN then they show the defined zero voltage When the unused
28. perature coefficient 0 05 10K Measurement direct indirect Max ratio of voltage transformer 999 kV 100 V optional SW PO Current inputs with flexible sensors AMOSm MEg38 SW setting of the nominal value Nominal current I 100A 300A 1 000A 3 000A Measuring current range d I1_ to 1209061 Frequency range 40 Hz to 6 5 kHz Current measurement uncertainty I 100A 300A 1000A 3000A 0 5 MV 0 196I 45 Hz to 60 Hz Value change with position 1 0 MV Value change due to ext fields 1 0 MV 0 21 external field produced by the conductor with 0 31 50 Hz at 25 mm distance from the closure Temperature coefficient 0 2 10K 44 PQ monitor MEg38 C User manual MESA Harmonic measurement uncertainty I 100A 300A 1000 A 5 Ls at Los 3 and 0 15 I at ls lt 3 L 1 I 3000A 10 T en at 22590 I and 0 5 96 I at ls 390 I n the range from 5 to 120961 2 With correct position of the closure Current inputs with clamp on transformers MTO0 5 MEg38 MT1 0 MEg38 Nominal current I 1A 5A 1A 5A Current measurement uncertainty 0 5 of range 1 0 of range Harmonic measurement uncertainty t 2 T ess at lens 2 3 L and 0 15 I atl 93964 7 10 on at I acm gt 3 I and x 0 5 96 I at I 390 I Measuring range 5 to 120901 Measurement category CATIV 300V CATIII 600V CAT III 300V Safety class II Protection rating IP40 with closed jaws IP30 with opened jaws
29. r 24 hours at 23 C 2K PQ monitor MEg38 C User manual MESA Measurement uncertainties and measuring ranges of voltage quality parameters under testing states 1 2 and 3 according to EN 61000 4 30 ed 2 LV and MV level f 50 Hz Flicker P A D P 0 2 10 0 IEC 61000 4 15 ed 2 1 4000 changes min Flicker Pise ma A 890P P 1 0 sine rectangular Voltage events Amplitude 0 2 U 596 U 15096U Duration 1 period 0 02 sec 60 sec Duration 1 period 0 02 sec 180 sec Unbalance 0 1 96 0 596 u 596u 0 596 u 5 96 u Voltage harmonics 9904 U 10 200 96 0 0590 U U lt 1 U of class 3 IEC 61000 2 4 IEC 61000 2 4 5 U for 0 590 U 15 90 U 3 U lt Us 1590U 0 15 U for 170U SU lt 3 U 0 1 9o U 1090 U 15090U mo o uae with GPS signal synchronization without GPS signal synchronization Signals in voltage Voltage deviations Time base Time base Voltage A ZU SOU 10 200 interharmonics 0 05 U U lt 1 U of class 3 43 MESA M c Energetick Apar ty Voltage inputs U1 U2 U3 and U4 SW setting of voltage level LV MV and HV Nominal phase voltages U P N 230 V 100 N3V Nominal line to line voltages U P P 400 V 100 V Measuring range of phase voltages 440 V 20V Maximum input voltage P N 450 V Voltage measurement uncertainty with f 50 Hz 0 05 M V 0 025 96 U Frequency range up to 6 5 kHz Input resistance 1 68 MO Tem
30. ronments the maximum voltage to the common wire may be 300 V For completion of the monitor before the measurement only accessories included in the monitor set according to the approved overvoltage category in accordance with the overvoltage category in the measured point are allowed to be used It is necessary to interconnect all of the components of the set before connecting to the measured voltages Itis recommended notto expose the monitor and the current sensors AMOSm MEg38 to water and moisture The clamp on transformers MT MEg38 voltage extensions load adapters and LV adapter may not be exposed to water and moisture For electric shock protection the voltage cords must be provided with contact ele ments included in Tab 1 or inserted into safe terminals of adapters or extensions before they are connected to the voltage Magnetic contacts may be only installed on turned off voltage circuits with zero voltage In LV switchgear with danger of touch with live parts is possible to plaec only parts of antenna with reinforced insulation A Caution The PQ monitor MEg38 C set is calibrated with the current sensors whose serial numbers are stated in the bottom part of the rating plate The measurement accuracy specified in the technical specification is guaranteed only in this set When the voltage is measured using adapters or voltage extensions the voltage cords U1 U4 and N of the monitor are to be inserted into the marked s
31. rvoltage category CAT III 300 V The communication cable USBmini EMC is to be connected to the opened communi cation USB connector of the monitor and its other end is to be connected to the USB connector of PC with the running parameterization program SW PQ as instructed in its user documentation 1 Connect GSM and GPS antennas to class A monitor and optionally also class S monitor according to figure 20 Pay attention to not interchange antennas CONNECTION TO THE VOLTAGE N Warning e t is not allowed to connect voltage measuring cords to phase voltages higher than 450 Vics otherwise there is a risk of electric shock e It is not allowed to connect the monitor to line to line voltages higher than 780 V otherwise there is a risk of electric shock In LV networks between MV LV transformers and electricity meters of customers characterized by the overvoltage category CATIV it is not allowed to connect the monitor to phase voltages higher than 300 Nos otherwise there is a arisk of electric shock The monitor must be operated only by qualified persons provided with protective equipment against electric shock 30 PQ monitor MEg38 C User manual MESA The voltage extensions load adapters and LV adapters must not be exposed to water The operating voltage range is from 52 V to 440 V If the monitor or its measuring cords are damaged mechanically it is needed to dismount the monitor immediately and send for repair
32. se measurement T pari imam DD Daia e arpa EU ETAT p e Ne T ETT a eee Fong Ede mdi er U kesi Sd iEADOD A LP 4000 Megsuremseni siepe phase LU ia Di geents f Lines bor ewer NE ane ames zi ix Waiapu pay mit 18D jam iiv z IE i ba fay a brea 9 E aj pna n 7 wore iw y 123 fA 14 A ignei ron gt Fima 1 E i E lus re oper limit S E pae 118 T 8 menm J J mange ni 41 FO Harmon Seconding interes a E Fi Francia F an U ame a harm B Tome K Hra pares od parida lor namples recording r rt bp 5 x a pa ne r Fu ROS Mur I uU T He Pet rr vL E A Vader trigger from Ud io ZA LR n LM harte irL berme W Quaity MW E wanmimmeRm Ferm 316 5 Hg 550 m a T Saee j 35 MESA M c Energetick Apar ty Fig 24 Example of the monitor setting for three phase measurement X jul r M rna ema nd bos ad ba HET Lorgar a fey A Hrm egr a Fi pae BO DO ds ovp Maasurement tree phais c LAS Ua T nes r d ees uer emp Voltage Curantg Amo Voller dipper tie 110 edere zi ej im r MINIE miri iir Lane DMa pote vj ihmi 700 To line OTO eerte item n Fi mmr 2S Wt Ed Hamoa Reverse inferred 60 pue vw 13 Ferrer ca A m humi p mr 7 Max emeber of periods for trapiai recording ue narra ws FE Worms rigger hr L8 Wit antra im FA e AR rarior use WW Start ammeedintely 7 Wem Ge jj 56 gt Fig 25 Measurement and
33. t is suitable to clean it with a damp cloth without any detergents BATTERY The following batteries are used in the monitor Lithium battery of CR2032 type for the clock circuit e Ni Mh accumulator of 8xV200H type for ensuring the measurement in case of a supply voltage outage The accumulator is charging when the monitor is connected to any of measured voltage U1 to U4 The duration of charging of completely discharged accumulator when power sup plying from single voltage with nominal value and positive temperature is shorter than 12 hours Fully charged accumulator in positive temperatures secure at least ten successive one minute supply intervals n total range of operation temperatures the fully charged accumulator ensures du ring power outage at least two one minute power supplying intervals e When starting monitor with fully charged accumulator after long term power off state and in temperature of environment 20 C then after short restoration of supply voltage monitor operates for at least 10 second 38 PQ monitor MEg38 C User manual MESA DISPOSAL After the use of the monitor is ended the monitor must be recycled in collecting centres according to rules for electronic waste disposal GUARANTEE A two year guarantee is provided for the monitor since the date of sale but no more than 30 months after its dispatch from the manufacturer Defects incurred during this period due to provably defective
34. tion of the single phase measurement with the clamp on transformers MT MEg38 on the currents I1 and I4 Fig 24 shows an example of parameterization of the three phase measurement with the flexible sensors AMOSm MEg38 on the currents 1 14 After the button Start of measurement is enabled and the data measured until now are deleted the measurement will be started according to the new selected parame terization Using menu button Measurement with RMS selection displays window with values of measured voltages and currents its time courses and phasor diagram of powers Example is on Fig 25 This way can be checked correct direction of instal lation of current sensors Using menu button Measurement with selection Samples displays harmonic com 8 P play ponent of measured voltages and currents oscillographic waveforms and phasor dia gram displaying orientation of currents and voltages Example is in Fig 26 PQ monitor MEg38 C User manual MESA Attention When line to line voltages and phase currents on the MV level are measured there is a phase shift approximately 30 between the voltage and the current This may differ in case of the current 14 TIME SYNCHRONIZATION USING GPS SYSTEM AND SETUP OF REMOTE GPRS COMMUNICATION N Warning GSM and GPS antennas are to be installed out of LV switchgear In the coiled state can be placed also into LV switchgears AN Pay attention to not interchange GPS and GSM antennas when co
35. ure 30 C to 60 C Water and chemicals protection Long term UV radiation protection Design details Dimensions version A 167 x 130 x35 mm with connectors 195 x 130x35 mm version S 152 x 130 x 35 mm with connectors 180 x 130x35 mm Weight 0 7 kg Length of voltage cords Im All insulated surface Polycarbonat material UV resistant inflammable Protection IP65 according to EN 60 529 Overvoltage category CATIV 300 V CATIII 600 V according to EN 61010 2 030 Safety class II reinforced insulation Test voltage 5 kV 50 Hz 1 minute 40 PQ monitor MEg38 C User manual MESA EMC EN 61326 1 2006 Electrical equipment for measurement control and laboratory use EMC requirements Part 1 General requirements Line terminal voltages EN 55011 ed 3 2010 Industrial scientific and medical equipment Radio frequency disturbance characte ristics Limits and methods of measurement Radiated emissions EN 55011 ed 3 2010 Industrial scientific and medical equipment Radio frequency disturbance characteris tics Limits and methods of measurement Radiated radio frequency electromagnetic field EN 61000 4 3 ed 3 2006 Electromagnetic compatibility EMC Part 4 3 Testing and measurement equipment Radiated radio frequency electromagnetic field Immunity test Power supply Supply voltage 57 7 V c to 400 V 10 50 Hz 80 V to 400V 10 96 Consumption 5 VAL52V 8 VAI230V
36. ve direction of energy flow Fig 13 Three phase voltage measurement and measurement of the voltage between the neutral conductor and ground three phase current measurement and measurement of neutral conducotr current with sensors 3AMOSm MEg38 and AMOSm MEg38 ul i nece L2 L d L3 hy if Sen Mil om 21 MESA M c Energetick Apar ty Fig 14 Three phase voltage measurement and direct three phase current measure ment with the sensors 3MT0 5 MEg38 Positive direction of energy flow 22 PQ monitor MEg38 C User manual MESA Fig 16 Measurement of phase voltages and current and voltages between the neutral conductor and ground with the single phase load adapter Z MEg38 Direction g of single phase load IUE Fig 17 Measurement of phase voltages measurement of neutral conductor voltage to ground and measurement of phase currents of an appliance with the three phase load adapter 3Z MEg38 Direction of ur am ipad 23 MESA M c Energetick Apar ty Fig 18 Three phase measurement of line to line voltages and phase currents with the sensors 3MT1 0 MEg38 in MV and HV networks with grounded neutral point Positive direction of energy flow 24 PQ monitor MEg38 C User manual MESA Fig 19 Measurement of line to line voltages UO voltage and phase currents with the sensors 3MT0 5 MEg38 in a compensated MV network Li Positive
37. y the attached caps Voltage cords with double insulation long 1 m good flexible also under negative tempe ratures with colour coding U1 U2 U3 and U4 are red N is black ended with safe banana plugs CATTV 300V Measurement of the currents I1 I2 I3 with separate sensor triplet and the current I4 with a standalone sensor all approved for instalation into LV switchgears with 2 m cables with good flexibility also under negative temperatures Purpose differentiated mutually not interchangeable automatically identified current sensors with SW switching of measuring ranges in flexible version and in clamp on transformer version Flexible sensors AMOSm MEg38 of the safety class II for installation on the LV level is all insulating waterproof overvoltage category CATIV 300V with the sensing part long 40cm range of measured currents from 100A to 30004 sensing part closure allows opening with just one hand e Clamp on transformers MT0 5 MEg38 with overvoltage category CATIV 300V for measurements in covered environments with accuracy class 0 5 for direct and also indirect measurements of currents with nominla value 1 A and 5A on the LV MV and HV level or clamp on transformers MT1 0 MEg38 with overvoltage category CATIII 300 V for measurement in covered environments with accuracy class 1 0 of current with nominal value 1 A and 5A indirectly on MV or HV voltage level or directly on LV level with overvoltage category CAT III Definiti
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