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1. 12 230 Voc oc 12 230 Vac oc 12 230 12 230 Vac de n s NA MA 450mA MAX LOAD 50MA LOAD 150mA MAX LOAD MAX LOAD Do2 Do2 Do3 Do3 Do4 w qm o a Do4 88 lt a 3 8 8 EE 2 unan MERE OBERE BE E wv Do2 TI Do2 DIT Lov DII Do3 LI TT Lav Do3 TI ol Do4 C N Do4 TT sings 51 82 51 52 51 52 1 G Av 23 EMA90 USER MANUAL 8 3 ANALOG OUTPUT OPTION The analog output is optional See the chapter 11 10 to program it 0 20mA or 4 20m4A In this configuration the instrument will be equipped with 2 digital inputs 2 digital outputs and 1 analog output Output is at galvanic insulation with maximum load impedance of 5000 The connection to other peripherals as recorders ammeters remote indicators etc must be carried out using a maximum cable size of 2 5mm
2. 0 20mA 4 20mA Max 5000 OUT OUT O BB TET er JO Do L Lav J L3V OUT N OUTH o CT i d 9122 Stee RR If long distances must be covered the wires connected to the EMA90 needs to be wired in a separate channel from the power supply cables if an intersection occurs between the power supply cable and the analog wires please remember to cross the intersection at 90 degrees in order to cut the generated magnetic fields 24 EMA90 USER MANUAL The EMA90 gives a current signal range 4 20mA or 0 20mA proportional at the measures of the selected parameter The output is bi directional the current can be directly or inversely proportional to reference value programmed Bi directional means reversal of reference value and not inversion of current Examples 20 mA S Apparent Power Min 2000VA Max 10000VA lt E a o pm i Min 1000W 0 Max 1000W lt ul P F Power Factor zai 0 5 1 0 5 lt o N lt o Q Reactive power Min 2500VAr Max 7000VAr 25 EMA90 USER MANUAL 8 4 SERIAL OUTPUTS Through the combination of an asynchronous serial RS485 and RS232 communicati
3. ae O sHEHHHEs O 51 5251 52 5152 N Q Li 12 L3 ANa The signs and on outputs in the picture have electric meaningless If long distances must be covered the wires connected to the EMA90 needs to be wired in a separate channel from the power supply cables if an intersection occurs between the power supply cable and the analog wires please remember to cross the intersection at 90 degrees in order to cut the generated magnetic fields 22 EMA90 USER MANUAL 8 2 1 DIGITAL OUTPUTS OPTION This option has 2 digital outputs PHOTOMOS With this option the instrument will be equipped with 2 digital inputs and 4 digital outputs
4. 1 HT QUEE SERES Aie If a RS232 communication line is shorter of 5 mt and a multidrop network will not use it s not necessary to use a serial line converter because the serial output is compatible with the PC as shown on the above mentioned picture A RS232 could reach 15mt but the presence of noises in the industrial application could cause breakdown in the communication The connection from EMA serial port RS232 to PC RS232 serial port is a PTP Pin To Pin connection SIGNAL EMA90 DB9 PC TX 1 PIN 2 27 EMA90 USER MANUAL 8 4 4 MODEM CONNECTION application in order to cover big distances MODEMAPPLICATION PHONE LINE MODEM EL c Piss PS Fae FE res It s possible to manage the supervisioning of energy gan consumption through remote structures as modem PRINTER EMA90 segnale ass ne modem DB25 modem DB9 Transmit Data 1 9 2 3 RX B Receive Data 2 8 3 2 Ground Signal GrouND 3 3 7 5 To make the remote connection it needs to program the remote modem connected to the EMA network To program this modem the user has to use any communication program like HyperTerminal The Hayes commands to program a st
5. There are n 2 support guides to mount on opposite side of instrument 14 EMA90 USER MANUAL 5 INTERNAL BATTERY To avoid to lose the setup and all storing data the instrument is equipped of an internal battery CR2450 5 1 REPLACEMENT INTERNAL BATTERY Only a qualified and authorized technical person can change the internal battery This operation will delete all storing data and it will restore the default setup with the exception of the password and the code to enable the harmonics and time bands Using the software NRG or relative serial commands it s possible to download all storing data to avoid to losing same The next figure shows where is located the battery inside the instrument 4 WAY PIN STRIP 3 WAY PIN STRIP Instruction to change the internal battery 1 It s necessary to cut off the power supply of instrument and to disconnect all inputs and all outputs 2 Using a screwdriver remove the rear and the frame to unscrew the 4 screws and to act on 4 retention hook 3 It s necessary to pay attention to presence of residual voltage inside the instrument Don t touch any other component different from the battery circuit 4 To extract the instrument from the case rear 5 It s necessary to extract the circuit with the battery Disconnect the 4 way pin strip To make
6. 22 n 3 Phase 1 E System L1 Phase o 12 Phase 4 gt L3 Phase j 4 A 2 L1 Phase V C lt gt L2 Phase V C lt L3 Phase V C lt E Pha Voltagel Line Voltage ytd A 4 Line Current Avg Current te Ag usaq Y 4 A 5 Thd Voltage les Thd Current 7 3Pha Reacti A nt 6 daos je Active Powers lt gt ONES gt He j Y ry A 7 Power Factor lt Cos w Phasor T 8 User Page Y 9 Counters Y A Average 10 Total Energies 1 91808 Ja Max Demand Y 4 TB Energy Energy Energy Energy Energy Energy 11 Today je Today 2DaysAgo lt gt 2DaysAgo l Yesterday l Yesterday k v P1 P2 P3 P4 P1 P2 P3 P4 P1 P2 P3 P4 Energy Energy Energy TB Energy Energy 12 This Month This Month 2 Months Ago k 2 Months Agota Previous Monte Previous Month Y P1 P2 P3 P4 P1 P2 P3 P4 P1 P2 P3 P4 Energy Energy k TB Energy k TB Energy TB Energy TB Energy 13 This Year This Year 2YearsAg l 2 Years Ago la Previous Year Je Previous Year ke Y P1 P2 P3 P4 P1 P2 P3 P4 P1 P2 P3 P4 4 Energy Total Energy 14 TB PR TB lt Y P1 P2 P3 P4 A Me Min Max Min Max Min Max Min Max TUE re e M rx DL Y ere L1 Voltage L2 Voltage L3 Voltage
7. 29 EMA90 USER MANUAL 9 USE 9 1 FUNCTION KEYS UP amp DOWN KEYS The UP and DOWN keys allows to skip through the real time pages and to t select the programming level or to modify values during the input in the setup menu LEFT amp RIGHT KEYS The LEFT and RIGHT keys allow to visualize the real time sub pages and to move the cursor in the field of input data in the setup menu To skip from real q gt time pages and to go in the menu setup it s necessary to press simultaneously both these keys To come back at real time pages to repeat the same operation SLECT SELECT Other functions allow to see average values minimum and maximum storage and harmonic components When it s possible to accede at these function two little arrows appear on the display s bottom bar ENTER KEY ENTER key if pressed for at least 3 seconds on any of the real time pages instantaneous value pages sets the current visualized page as MAIN PAGE ENTER In the SETUP menu the ENTER key allows to enter in the setting menu or submenu in order to program and or set values and confirm the operation s ENTER DISPLAY CONTRAST It is possible to regulate the contrast of the display directly from the keyboard pressing simultaneously the UP key with the ENTER key the display will change in lighter To change the display in darker it
8. 6 1 POWER SUPPLY The instrument doesn t work without power supply Before powering the instrument verify always to insert the right value 85 265 Vac dc standard 20 60 Vac dc OPTION The instrument is equipped with an internal protection fuse on the power supply type 5x20mm dimensions 315mA 250V Fast i e Schurter FSF If the instrument is off with presence of power supply it s necessary to verify the internal fuse In case of fuse replacement disconnect the instrument from the power supply current plus voltage input and all input output sections digital input output analog output RS485 RS232 serial port etc then using a screwdriver remove the rear and change the fuse that is near the power supply connector in the low part of instrument Only a qualified and authorized technical person can change the fuse Extract the interrupted fuse using a screwdriver and with a plier insert the new fuse The instrument s power supply does not require any earth connection 16 EMA90 USER MANUAL 6 2 VOLTAGE INPUTS EMA90 can measure voltages up to a maximum 600 Vrms between phase phase further that value it is imperative to use voltage transformer When using voltage transformer make N sure to respect the input and output polarities Use cables with maximum cross section of 2 5mm attach them to the voltage measurement screw terminals Connect the instrument following up the wiring diagrams descri
9. 40 ELECTRICAL MULTIFUNCTION ANALYZER megacon SELECT SELECT P UP P DOWN User Manual IM 125 U M v 4 0 EMA90 IM125 U M v4 0 doc megacon EMA90 USER MANUAL Information in this document is subject to change without notice and does not represent a commitment on the part of Megacon This documentation is consigned to the customer to enable the correct and safe operation of the instrument any other use of documentation is strictly prohibited The information contained herein is the property of Megacon and by law no part of it may be reproduced transcribed stored in any retrieval system or translated into any language by means even for internal purposes by the customer without the express written permission of Megacon In addition no part of this manual may be transmitted in any form by any means including photocopying and recording for any purposes without the express written permission of Megacon In case of Copyright violation the customer is directly responsible TERMS OF WARRANTY The warranty is valid for the period of twelve months after material receipt The warranty covers free repair or replacement of equipment parts which are recognized as faulty due to manufacturing defects Warranty does not cover those parts which results defective due to misuse or improper use incorrect installation or maintenance operation by unauthorized personnel damage during transportation or which in any case do not s
10. EMA90 USER MANUAL 11 7 STORAGE The STORAGE menu allows the programming of the data to store 4 section of storing exist relative minimums and maximums average powers harmonic components samples only with NRG software or serial command The storage is organized as FIFO first in first out type memory When the memory is full older data will be overwritten by new data e MIN amp MAX The acquisition time is expressed in minutes up to 12 MIN amp MAX values are stored Enable confirming the ENABLE voice the operator may enable ON or disable OFF the acquisition of MIN amp MAX values Measures parameters to store Select the variable to store in the minimums and maximums with the LEFT and RIGHT keys enable or disable this variable with UP and DOWN keys Rate min acquisition time This is the acquisition time of minimum and maximum values range 1 9999 minutes For example to store the minimum and the maximum value of programmed parameters each 15 minutes it s necessary to set 15 If the storing of minimum and maximum values is enabled the values shows in the relative page are updated at the same acquisition time set for the storing in memory Minimum and maximum values are not absolute any more e Average Power Storing of average active and reactive power It s possible to enable or disable the storing The sampling time is set at 15 minutes but it s modifiable Time Av
11. RS232 RS485 converter Max 32 EMA max 1200 TT uo x q XE uds eo mE 9 5 xx 12 11 10 9 8 7 6 5 4 3 2 4 172 11 10 9 8 7 6 5 4 3 2 4 Ros gt SN lt ox Once a RS485 network has been configured to communicate between the Host computer and the instrument s EMA a serial interface converter must be wired between PC and instrument s as mentioned on the above picture In serial line over 500 mt connect a line termination resistor Rt 100Q 1200 between the two twisted pair cables leading from the converter at the end of the network last connected instrument It s recommended to use always twisted pair cable with minimum cross section of 0 36mm 22AWG and capacity less than 60 pF m i e BELDEN cable type EIA RS485 Ref 3105A 26 EMA90 USER MANUAL 8 4 2 RS485 CONNECTION SHIELDED d PE CT RSONAL COMPUTE N 4 ER
12. TIME delay time by enabling the digital output or duration of impulse HYSTERESIS INFVALUE and SUPVALUE lower value and higher value for alarm of external band DIGITAL INPUT sets the type of acquisition Not used Clock Synchronization Periods Counters INPUT NAME WEIGHT or External Synchronization ANALOG OUTPUT set the analog output number OUT INDEX TYPE disable 0 20mA and 4 20mA MEASURE CODE the parameter to associate at analog output MIN and MAX lower value and higher value of the variable to associate at current output RESET allows to make a RESET MEASURES RESET SETUP RESET STORAGE RESET COUNTER RESET MAX DEMAND and RESET GLOBAL EXIT SETUP allows the operator to exit from the main menu or setup page in order to reach the instantaneous value page Before exiting the page the instrument will question the operator if he might to save the STORAGE Setup in case one or more parameters have been modified All the above mentioned voices will be described on the following chapters 42 EMA90 USER MANUAL 11 3 GENERAL The general menu is subdivided in the following sub menu KCT current transformer ratio KV T voltage transformer ratio Mode type of connection Measure Time filter time in the visualization measure Warnings B Light display backlight on time Def Page Time the time before to come back to default page Sync frequency synchronization Clock clock and calendar Password se
13. Gas Set Weights allows to set for each counter the weight of the pulse The value set is the number of pulse for unit of increase of the counter ex to see to increase the counter of one unit each 5 pulse it s necessary to set the value 5 50 EMA90 USER MANUAL 11 10 ANALOG OUTPUT OPTION Selecting the analog output voice the following programming page appears e Out Index expresses the number of output to select or program which are present on the hardware of the instrument Type allows to select the value of current output disabled 0 20mA 4 20mA Through the up amp down keys it may be possible to select the type of the output current by pressing the ENTER key the configuration is saved e Measure Code is the measure see cap 12 to associate at the analog output e Min full scale value of the lower limit of the programmed value Measure Code Once the minimum full scale has been programmed the instrument automatically will associate the minimum current value 0 or 4 mA at this value e Max full scale value of the upper limit of the programmed value Measure Code Once the maximum full scale has been programmed the instrument automatically will associate the maximum current value 20 mA at this value If the minimum end scale value is lower of maximum end scale value the out of current will be directly proportional at variable set otherwise it will be inversely prop
14. Q PS 1 2 4 N e e e 4 wires insertion 3 current transformers and 3 voltage transformes L1 6 f L2 6 O L3 o No d L1 a L2 lt SlmmS2 5 L3 a e PI P2 3 N e 4 wires insertion 3 current transformers LI 6 L20 al L3 o No SlmmS2 a Li e pim 1 8 4 Single fase insertion 1 current transformer o L16 n L26 12 L3 6 4 N ts 9 EJ 7 H H 7 _ L1 e 4 a sens 5 pip x 4 wires insertion 3 current transformers and 2 voltage transformers 18 EMA90 USER MANUAL 7 OPTION BOARDS The following table shows the right combination of option board OPTION CONTEMPORARY OPTIONS 1 Combination 2 Combination 3 Combination 4 Combination 4 INPUTS Di3 Di6 Yes No No No 2 OUTPUTS Do3 Do4 RS485 COM2 gt ANALOG OUTPUT OUT RAM Yes No Yes No Yes No Yes No This module has an output 0 5Vcc Only during the assembly of instrument it s possible to mount the option board 19 EMA90 USER MANUAL 8 INPUTS OUTPUTS 8 1 DIGITAL INPUTS The EMA9O h
15. at 25 C 77 F Stored variables Average power Min max values Harmonics option Samples Display interface 128x128 dot graphic LCD at high contrast adjustable and with LED backlit Dimension 50x50mm EMA90 USER MANUAL Keyboard interface 5 functional keys for paging and programming Operating temperature From 10 C 14 F to 50 C 122 F Storage temperature From 15 C 5 F to 70 C 178 F Operating humidity 90 not condensing Protection standards IP 52 front EN60529 IP65 with gasket on request IP 20 screw and terminals Weight and dimension 0 430 kg app equipped with 2 digital outputs 2 digital inputs RS485 and RS232 Memory 128Kbytes 96x96x130 mm LL 5 5 96 mm 9 106 mm 15 J EMA90 USER MANUAL 2 2 MEASURING METHOD AND ACCURACY Measuring range 30 500Hz Measuring method 64 sampling per period for V1 and 11 V2 and 12 V3 and 13 Measuring interval 0 1 second Instrument accuracy o c J Model EMA90 Model EMA90 05 Voltage 0 5 96 0 25 96 Power 1 96 lt 0 5 95 Energy lt 1 lt 0 5 Power Factor lt 1 lt 0 5 96 Standard EN 61036 EN60687 Sampling frequency 45 Hz 2 280 or at 60 Hz 3 88kHz Zero self regulation Offset 0 1 second RTC REAL TIME CLOCK Accuracy 5 PPM standard CEI EN 61038 2 3 PROG
16. programmed value Max Threshold the output is enabled if the value of the selected variable is higher of the programmed value Band the output is enabled if the value of the selected variable is lower of the programmed minimum value or higher of the programmed maximum value Always On digital output is always enabled Measure Code is the measure see cap 12 to associate at the digital output To program the digital output as pulse emission it s necessary to select an energy variable Value intervention threshold value i e for overcoming 340V program 340 0 or 150kW program 150000 0 or pulse weight i e if the active positive energy pulses must be emitted every 1 kWh program 1 00 programmable from 0 01 to 100 kWh pulse Time is the threshold delay for intervention expressed in second 0 655 seconds or duration time of Pulse expressed in milliseconds 50 500 ms Hysteresis it s the percentage of alarm s value under which the alarm come back in off condition it s programmable from 0 to 99 example max threshold of active power at 150kW with 10 hysteresis means the alarm come back in off condition when the active power will be 150 15 135kW It s not available in Pulse mode InfValue and SupValue low limit and high limit of alarm in band way Note digital output management for P F cos In the P F and cos the absolute minimum is considered the 0 capacitive and the absolute maximum the 0 inductive T
17. INPUTS 6 3 CURRENT INPUTS 6 4 WIRING DIAGRAM 7T OPTION BOARDS 8 INPUTS OUTPUTS 8 1 DIGITAL INPUTS 8 1 1 DIGITAL INPUTS OPTION 8 2 DIGITAL OUTPUTS 8 2 1 DIGITAL OUTPUTS OPTION 8 3 ANALOG OUTPUT OPTION 8 4 SERIAL OUTPUTS 8 4 1 RS485 CONNECTION NOT SHIELDED 3 CO O O O Q Q N N N N N N N Np gt O O A G N gt NNN ODO O Q QQ T OOOO N EMA90 USER MANUAL 8 4 2 RS485 CONNECTION SHIELDED 8 4 3 RS232 CONNECTION 8 4 4 MODEM CONNECTION 8 4 5 OPTION RS485 9 USE 9 1 FUNCTION KEYS 10 REAL TIME VALUES 10 1 VISUALIZATION TREE 10 2 MEASURES VISUALIZATION 10 3 STATUS AND INFORMATION PAGES 11 SETUP 11 1 SETUP ITEMS 11 2 MAIN MENU SETUP 11 3 GENERAL 11 4 SERIAL COMM 11 5 AVERAGE 11 6 ENERGY 11 7 STORAGE 11 8 DIGITAL OUTPUT 11 9 DIGITAL INPUT 11 10 ANALOG OUTPUT OPTION 11 11 RESET 11 12 EXIT SETUP 12 LIST OF MEASURES 13 PROBLEMS AND SOLUTIONS 14 SERIAL COMMUNICATION PROTOCOL 15 Notes 4 27 27 28 29 30 30 30 31 32 39 41 41 42 43 44 44 45 47 48 49 51 52 52 52 54 55 55 EMA90 USER MANUAL 1 MAIN INFORMATION 1 1 INTRODUCTION EMA90 was engineered and tested in compliance with IEC 348 class 1 standards for operating voltages up to 600 Vac rms considering the VDE 0110 group C isolation standards for operating voltages up to 500 Vac rms The present manual contains all of th
18. Month 1 12 Day 1 31 STORAGE MIN MAX Enable On Off Measures list of parameters Rate min 1 9999 AVG POW Enable On Off HARM Enable On Off DIGITAL OUTPUT Out Index 1 6 Type AlwaysOff EnergyPulse Min Thresold MaxThresold Band AlwaysOn Measure Code list of parameters Value Time 50 500 Hysteresis 0 99 Inf Value Sup Value DIGITAL INPUT Type Not used Clock Sync Period Counters Ext DI COUNT gt INPUT K1Dig Inp 0 8 K8Dig Inp 0 8 COUNTER NAME Cnt1 User Def KWh KWh KVarh KVarh Water Gas Cnt8 User Def KWh KWh KVarh KVarh Water Gas SET WEIGHTS K1 0 1999 99 K8 0 1999 99 ANALOG OUTPUT Out Index 1 4 Type 0 20mA 4 20mA Measure Code list of parameters Min Max RESET RESET MEASURES All Yes No Energies Yes No TimeBands Yes No Min Max Yes No Reset Setup Yes No Reset Storage Yes No Reset Counter Yes No Reset Max Demand Yes No Reset Global Yes No EXIT SETUP Remember always to confirm the entering exiting or programming always with the ENTER key the last modification will be kept in the non volatile memory of the equipment until further reset of the system 41 EMA90 USER MANUAL 11 2 MAIN MENU SETUP The main menu or SETUP page is configured in the following way GENERAL includes the settings of KCT current ratio KTV voltage ratio MODE 4 wires 3 wires Aron MEASURE TIME time constant of measure filter WARNINGS B LIGHT B
19. PF e P F power factor L3 PF Variable reading phase coso e coso three phase system coso 5 e coso cose L1 cosp e coso cose L2 e coso cose L3 coso 35 EMA90 USER MANUAL Phasor option Fresnel diagram Phase angles in degree voltage current and PF for each line User page The user can define in the setup menu General User Page the variables to display in this page Variable reading counters This page shows the 8 counters available Note This page appear only if the digital inputs are set like COUNTERS Variable reading consumption of active and reactive energy Normal e kWh positive active energy counter kWh e kWh negative active energy counter KWh e kVArh inductive reactive energy counter kVArh e kVArh capacitive reactive energy counter kVarh Note If Energy Type is set like Heavy the measure units are expressed in MWh and MVArh Variable reading average powers e W kW MW GW average active power P e VAr kVAr MVAr GVAr average reactive power Q 36 EMA90 USER MANUAL Max Demand Max demand of each band and total Variable reading time band energy counters option 20 pages to display the active energy counters positive and negative and reactive capacitive and inductive divided in 4 programmable time bands P1 P2 P3 P4 The 20 pages are consumption present year and the two previous consumpti
20. RS232 Rs485 LB gt em converter A 12 11 10 9 8 7 6 54 3 2 4 12 1110 9 8 7 6 5 4 3 2 1 5105 513 DEOR A Although the signal is given by the difference between A and B voltage a ground connection is needed to eliminate or to reduce the common mode noise induced into the bus To reduce the EMI interferences need to connect the shield directly to a ground at one end and with a series RC network at the other end R 1000 C 33pF The max length of the stubs is 20cm g 8 4 3 RS232 CONNECTION 1211 10 9 8 7 6 5 4 3 2 1 Pe Er I
21. change product specifications without prior notice 55 EMA90 USER MANUAL megocon
22. distortion of voltage L3 phase Thd Variable reading THD of current e Thd total harmonic distortion of current L1 phase Thd e Thd total harmonic distortion of current L2 phase Thd e Thd total harmonic distortion of current L3 phase Thd Variable reading three phase powers e W kW MW GW three phase system active power XP e VAr KVAr MVAr GVAr three phase system reactive power gt Q e VA kVA MVA GVA three phase system apparent power XS e P F three phase system power factor XPF 34 EMA90 USER MANUAL Variable reading phase active power e W kW MW GW three phase system active power gt P e W kW MW GW active power L1 P4 e W kW MW GW active power L2 P e W kW MW GW active power L3 Ps Variable reading phase reactive power e VAr kVAr MVAr GVAr three phase system reactive power gt Q e VAr kVAr MVAr GVAr reactive power L1 Q e VAr kVAr MVAr GVAr reactive power L2 Q2 e VAr kVAr MVAr GVAr reactive power L3 Qs Variable reading phase apparent power e VA kVA MVA GVA three phase system apparent power ES e VA KVA MVA GVA apparent power L1 S4 e VA kVA MVA GVA apparent power L2 S e VA KVA MVA GVA apparent power L3 S3 Variable reading phase power factor e P F three phase system power factor XPF e P F power factor L1 PF e P F power factor L2
23. in 4 sections e storage values average powers Avg Powers e storage values relative minimum and maximum Min Max e storage values harmonic components Harmonics e storage values samples Samples Each section is displayed in own sub page The page shows the following information e Type of section of memory for examples samples e Status ON if memory enabled or OFF if memory disabled e Record s number of stored events in memory Memory Kb e Available static memory expressed in Kb which is available to store data for this section e Used dynamic memory expressed in Kb which is used by data already stored record stored e Free dynamic memory expressed in Kb which is free to store data Used amp Free memory are working together blocks of memory are transferred from Free memory to Used memory in order to store the values on the RAM of the instrument Initially the available memory will be totally free but at own exhaustion it will be totally used These information are very important to avoid to delete stored data to choose how to storage the data on the basis of available memory Digital I O The page shows the ON OFF status of the digital inputs and digital outputs The symbol indicates that none output input is present on the hardware these are inputs outputs optional 39 EMA90 USER MANUAL Warnings To see warnings are available 2 pages The first page shows the
24. is necessary to press simultaneously the DOWN key with the ENTER key SYSTEM RESET To reset the unit directly from the keyboard without entering in the Setup menu where from there it is also possible to q gt reset the unit through Reset Global on chapter 11 11 operator may press simultaneously the 4 arrow keys after 2 seconds the complete unit will be re set eLeCT SELECT VIN 10 REAL TIME VALUES The real time pages show all the possible performed measurement of the instrument during the evolution All visualized pages may be set as main page by the operator this means that the preferred page may be set as the one to be visualized To set the main page the operator shall press the ENTER key for at least 2 seconds the symbol of the main page is shown with a on the top right side of the display The visualization of real time measure includes a sequence of principal pages that its possible to see pressing UP and DOWN keys and secondary pages that it s possible to see pressing LEFT and RIGHT keys when these symbols lt and gt compare 30 EMA90 USER MANUAL 10 1 VISUALIZATION TREE
25. this it s necessary to move the battery circuit away from the circuit with 12 pole terminal board it s not necessary to force too much Finally extract the 3 way pin strip 6 Change the battery Put the positive pole in the high direction 7 Proceed at the contrary of the disconnected operation to reinstate the battery circuit insert the 3 way pin strip and after like described at the point 5 reinstate the 4 way pin strip 8 The 4 pin strip must meet with their relative support 9 Insert the instrument in the case 10 Replace the frame Screw the 4 screws Close the rear Restore all the connection and turn on the instrument 11 In the Warnings page is possible to check the condition of battery BATTERY OK 15 EMA90 USER MANUAL 6 CONNECTION ES Do1 Do1 Di2 A B Di2 Di1 COM RX TX Di1 12 1110 9 8 7 6 5 4 3 2 1 JUMPER BATTERIA O Lav Do2 Do2 L2V L3V N S S S1 S2 S1 S2 S1 S2 L N N l 12 Vaux C
26. 90 USER MANUAL 2 TECHNICAL FEATURES 2 1 GENERAL SPECIFICATIONS Power supply Auxiliary voltage 85 265 50 60 Hz dc 20 60V 50 60 Hz dc option Isolation voltage 3700 Vac rms x 1 minute Voltage input 3 inputs range 10 600Vrms between phase phase Over voltage up to 750 Vac permanent beyond this value it is imperative to use voltage transformers Over voltage category III fixed installation Pollution degree 2 normally not conductive temporary conductive for condensation Resistor input 2 MO Burden 0 2 VA Current input Model EMA90 Model EMA90 1A Consumption 4VA typical 6VA max full optional Serial output Standard 1 output RS485 and 1 RS232 half duplex isolated signals Tx Rx Gnd Option 1 a second RS485 the option has an output 0 5V galvanic insulation Programmable baud rate from 1 200 to 19 200 bps Communication protocol standard ASCII and MODBUS RTU Input signals Standard 2 passive opt isolated inputs 1000 V 12 24 Vcc Option 4 passive opt isolated inputs 1000 V 12 24 Vcc total 6 inputs Output signals Standard 2 photomos outputs 12 230 Vca cc 150mA max or 2 Relay outputs on request Options 2 photomos outputs 12 230 Vca cc 150mA max or 1 analog output 0 20 or 4 20 mA galvanic insulation Memory data retention RAM 128 KB useful 100KB 1 Mbytes all useful option No volatile memory data using internal battery Data retention 5 years typical
27. COM vs Di6 i Di5 Di4 12 24 Vdc Bis j 12 24 Vdc Ns 1 1 gt S S OX x 12 1 10 9 8 7 6 5 4 3 2 1 J S ubi id A aux Do2 12 24 Vdc Do2 COM Di6 7 Di5 ies Di4 Di3 FTN ii sae 5 se G8 m aaB aaG o tci 21 EMA90 USER MANUAL 8 2 DIGITAL OUTPUTS During the assembly the instrument can be depicted with 2 PHOTOMOS outputs or 2 RELAY outputs Each outputs can be programmed as min max threshold external band always ON and pulse emission Power supply from 12 to 230 Vac dc max load 150mA the typical value of the PHOTOMOS output resistance ON is 80 Ronmax 12 The relay specifications are the following Maximum power 62 5 30W Maximum voltage 250 VAC 220 VDC Maximum current 2A The typical currents are 0 5A 125 Vac 2A 30 Vdc 0 3 110Vdc 12 230 Voc ac 12 230 Voc dc W M 150mA MAX LOAD LOAD Do2 Do2 a
28. Curent L1 Current Min Max Min Max Min Max Min Max Min Max Min Max 3 PH Avg 3 Ph Power 3PhVa 3 Ph Watt Watt Fador Power gt acurat M Le Curent 4 16 THD Volt Curr4 00 09 10 19 le 20 29 30 31 HI0009 L H1 10 19 L HI 2029 L HI 30 31 Y AK w wv vis qu iw i Y Harmonics 74 gt Harmonics Harmonics gt Harmonics Harmonics 7 Harmonics j 4 18 Ed Clock Calendar Y St 5 49 L orage Storage Storage orage Y Avg Powers gt Min Max lt gt Harmonics Samples 4 20 A Digital Digital LL Output Input Y 4 m L Wamings mings Y Connection lt s Battery lt options 2 22 Info Note Page displayed only if the Digital Input is set as COUNTER v 1 31 EMA90 USER MANUAL 10 2 MEASURES VISUALIZATION Variable reading of three phase system e V kV RMS three phase system voltage gt Vaa e A RMS three phase system current gt I e W kW MW GW three phase system active power gt W e PF three phase system power factor gt PF e F frequency L1 F4 Variable reading of phase L1 e V kV RMS voltage L1 phase V1 e A kA RMS current L1 l4 e W kW MW GW active power L1 W 4 e PF power factor L1 PF Variable reading of phase L2 e V kV RMS voltage L2 phase V e A kA RMS current L2 l2
29. DE E prom lost data to try again to input another or the PASSWORD time the data lost If the problem have not been solved or for other information not covered in the present manual please contact with our Technical Assistance Department Before contacting it is suggested to collect the maximum information regarding the installation and mainly the following data Model and serial number from the label on the top of the instrument housing Purchase receipt Description of problem System configuration hardware fitted firmware release etc TONS 54 EMA90 USER MANUAL 14 EMA SERIAL COMMUNICATION PROTOCOL The Electrical Multifunction Analyzer EMA series are disposal with two communication standard protocols ASCII MODBUS RTU and optional PROFIBUS with external module TCP IP Ethernet with external module The standard communication protocol has been optimised for the connection of the analysers with the NRG management software allowing to use all the available functions automatic search of the unit in the network automatic data downloading etc Even so the NRG software supports the MODBUS protocol About all the information of protocols communication to see specific user manual EMA SERIAL COMMUNICATION PROTOCOL 15 Notes WARNING Megacon declines all liability for any damage to people or property caused by improper or incorrect use of its products Megacon reserves the right to
30. L1 and L2 phases L23 V Voltage between L2 and L3 phases L31 V Voltage between L3 and L1 phases 3Ph I Three phase current L11 L1 phase current L21 L2 phase current L31 L3 phase current THDI L1 THD current L1 phase THDI L2 THD current L2 phase THDI L3 THD current L3 phase 3Ph PF Three phase power factor L1 PF L1 phase power factor L2 PF L2 phase power factor L3 PF L3 phase power factor 52 EMA90 USER MANUAL 3 Ph Cos L1 Cos L2 Cos L3 Cos 3Ph VA L1 VA L2 VA L3 VA 3Ph W L1 W L2 W L3 W 3Ph VAr L1 VAr L2 VAr L3 VAr 3Ph Wh 3Ph VArh 3Ph Wh 3Ph Varh THDV L1 THDV L2 THDV L3 Avg W Avg l Avg Var Temp LiAvg L2Avg I L3Avg I Neutr l Vunb lunb KFact1 KFact2 KFact3 Three phase Cos L1 phase Cos L2 phase Cos L3 phase Cos Three phase apparent power L1 phase apparent power L2 phase apparent power L3 phase apparent power Three phase active power L1 phase active power L2 phase active power L3 phase active power Three phase reactive power L1 phase reactive power L2 phase reactive power L3 phase reactive power Three phase positive active energy Three phase inductive reactive energy Three phase negative active energy Three phase capacitive reactive energy THD voltage L1 phase THD voltage L2 phase THD voltage L3 phase Average three phase active power Average three phase current Average three phase reactive power Temperature Average current
31. L1 phase Average current L2 phase Average current L3 phase Neutral current Voltage unbalance Current unbalance L1 phase K factor L2 phase K factor L3 phase K factor 53 EMA90 USER MANUAL 13 PROBLEMS AND SOLUTIONS If you have a problem setting up or using your instrument you may be able to solve it yourself Before calling your retailer or nearest distributor you should try the suggested actions that are appropriate to your problem Problem Possible cause Suggested The instrument doesn t turn on The power supply is Verify the connection and the disconnected or wrong presence of power supply The internal fuse is interrupted See the chap cap 6 1 to verify and or to change the internal fuse The display is completely dark Contrast badly adjusted Adjust contrast as described or clear on 9 1 The instrument doesn t Communication wires Verify the correct wiring communicate with the NRG Communication protocol Verify that the communication software or other Wiring system and protocol of the instrument communication software communication parameters coincides with the one used in the sw Verify the wiring type RS232 or RS485 and the settings of the serial port of the instrument The instrument communicates Not shielded wires Use shielded wires with the PC but the Connect terminations as par communication is interrupted 8 4 1 and 8 4 2 The instrument loses the CO
32. RAMMABLE PARAMETERS SETUP SECTION VT and CT ratio Mode insertion type 4 wires 3 wires Aron Integration time of Average parameters Sampling frequency Address or logical number of equipment Date and time Time bands of power consumption in different periods Storage section Min max Harmonics average power and Sampling values All parameters concerning the input output section serial port analog output digital input and output Preset energy counters EMA90 USER MANUAL 2 4 MEASURED VARIABLES PHASE VOLTAGE Rms LINE CURRENT Rms FREQUENCY TEMPERATURE 2 5 CALCULATED VARIABLES LINE VOLTAGE Rms THREE PHASE SYSTEM VOLTAGE Rms THREE PHASE SYSTEM CURRENT Rms AVERAGE LINE CURRENT AVERAGE THREE PHASE SYSTEM CURRENT NEUTRAL CURRENT POWER FACTOR THREE PHASE SYSTEM POWER FACTOR COSe THREE PHASE SYSTEM COSo APPARENT POWER THREE PHASE SYSTEM APPARENT POWER ACTIVE POWER THREE PHASE SYSTEM ACTIVE POWER REACTIVE POWER THREE PHASE SYSTEM REACTIVE POWER AVERAGE ACTIVE POWER AVERAGE REACTIVE POWER THREE PHASE SYSTEM ACTIVE ENERGY THREE PHASE SYSTEM TRANSFERRED ACTIVE ENERGY THREE PHASE SYSTEM INDUCTIVE REACTIVE ENERGY THREE PHASE SYSTEM CAPACITIVE REACTIVE ENERGY Total counters and time bands are available VL1 N E Vi2 N Via N la 3 li2 li Fui Hz Via Vi243 Visi V lLiave lL2ave lLsave lave IN PF PFiz PF PF COSo L1 COSo L2 COSo L3 COSo Su
33. Si2 S VA S VA Pi Pi Pus W P W Qu Q VAr Q VAr Pavo W Qavc VAr Wh Wh VArh VArh TOTAL HARMONIC DISTORTION THD 96 CURRENT AND VOLTAGE HARMONIC ANALYZES Option Analyzes up to the 31 harmonic of both voltage and current for each phase Vi Vin Vis ls liz li 96 EMA90 USER MANUAL 2 6 MEASURING amp CALCULATION FORMULAS Phase Voltage RMS Line Current RMS Active Power Reactive Power Appearent Power ALi V tin Lin W r Enn mu Paros Ter Power Factor P Li PFr Li A Li O0 Active Energy Why jw L 0 10 EMA90 USER MANUAL Reactive Energy Line Voltage 3 Phase Line Voltage 3 Phase System Current 3 Phase Active Power 3 Phase Reactive Power 3 PhaseAppearent Active Energy Reactive Energy Harmonic analyzes Cooley Tukey algorithm N 1 2 gt hO os n 0 for 0 lt k lt N 1 V L2 V 123 V 132 V3o 3 PLAT ppd ps Bo 3 W3 039 Or 2797 973 3 Wh3 Wh3gdt 0 O0 nk Nol _ J gt sin m J n 0 N 64 11 EMA90 USER MANUAL 3 INSTRUMENT DESCRIPTION The front panel of the EMA9O0 is described on the following section 2 RAD M 1 DISPLAY Back lighted graphic LCD 50x50mm 128x128 dot dot pitch 0 35mm x 0 35mm dot size 0 32mmx0 32mm high viewing direction 60 positive and negative visualiz
34. acklit on display timing DEF PAGE TIME time of wait before to come back to default page SYNC frequency synchronization CLOCK clock settings PASSWORD pin code to avoid that someone not authorized could modify the setup ACCESS code to enable option function like harmonics and or time bands USER PAGE to set the measures to display in user page and V UNBALANCE SERIAL COMM includes the settings of PROTOCOL ASCII or MODBUS ADDRESS logical number node or address COM1 serial port 1 integrated COM2 serial port 2 expansion board AVERAGE includes the settings of SYNC AVG synchronism of calculation average TYPE fixed or mobile TIME AVG integration time for the calculation of the average parameters and DT MOBILE sliding time of window mobile ENERGY includes the setting of TYPE energy counters in kWh or in MWh PRESET allows to set the initial value of total ENERGY counter and the generic COUNTERS and TIMEBANDS with all parameters to manage the power consumption in different periods STORAGE includes the settings of MIN MAX AVERAGE POWERS HARMONICS harmonic storing up to the 31 order for both current and voltage for each line DIGITAL OUTPUT sets the OUT INDEX number of digital output TYPE type of alarm always on max threshold min threshold external band energy pulse always off MEASURE CODE the parameter to associate with the digital output VALUE the value to set as threshold or pulse
35. ains on after the keyboard s inactivity To hold the display always on it has to be set the value as 0 The brightness of display declines about 1096 every 1000 hour of work Def Page Time is the time of wait before to come back to default page Range 10 900 seconds Mode internal or external V Freq programmable frequency value range 5 500Hz Set Clock sets the internal clock of the instrument with relative date The format of the date is dd mm yy and of the time is hh mm ss Day Light allow to set the yearly summer time change It s possible to enable the time shift of the summer time and the return at the solar time at the fixed data The instrument manages the summer time from the 1997 to the 2030 Password it s possible to set a numeric password to modify the SETUP The default password is 0000 the setup can be always opened and it s always possible to change any parameter If the password is different by 0000 from 0001 to 9999 at the entrance of setup the password will be request if the password is ignored it will be possible to see every parameter but it will be impossible to modify it Only with the correct password it s possible to change every parameter To set the new password as 0000 the instrument come back at default status Call the constructor to have an emergency password if you lose the password Access allows to input a code of 6 digits to enable the calculation end the visualization of the harmonics and
36. and or repairs must only be carried out by qualified and authorized personnel To ensure proper and safe use of the instrument and its correct maintenance and or repairs authorized personnel must follow normal safety procedures at all times SYMBOLS jt READ CAREFULLY THE CONTAINED INSTRUCTIONS 13 EMA90 USER MANUAL 4 3 MOUNTING The unit needs to be installed on front panel of mains control switchboards wiring and connections must be carried out following the EMC Electro Magnetic Compatibility procedures Plug in screw terminal blocks are used for appropriate wiring There is a security locking on the current inputs terminal block Suggested is to install the equipment on vibration free switchboards and with an environmental temperature ranging between 10 C and 50 C The panel cut out of the unit is the following 92mm Kur Z R3 E E 9 lt eA 96 mm Following the picture below mentioned insert the instrument from the front side of the switchboard from behind insert black support guide on the screw of the instrument once the black support guide fits on the screw and is pushed against the instrument and the internal panel screw the nut until the instrument is fixed on the panel LJ Hu Cl
37. andard modem are the following AT amp DO amp SO amp CO amp R1 50 2 AT amp W0Y0 The meaning of the commands is the following AT is the command prefix e amp D0 ignore DTR e amp S0 ignore DSR e amp C0 ignore CD e amp R1 ignore RTS e S0 2 set at two as the ring number after the which the modem automatically reply the number can be different by 2 but it must be different by 0 e amp WO store the configuration in the register 0 of the modem s not volatile memory e YO set the configuration stored in the register O of the modem s not volatile memory as the default configuration at the starting or the reset of modem See the modem s user manual 28 EMA90 USER MANUAL 8 4 5 OPTION RS485 With this option the instrument will be equipped with 2 digital inputs 2 digital outputs and 2 serial ports ON OFF Modem Personal Computer Rs485 Do2 Do2 A B V Op si D 5V E HHEHEHH 1
38. as 2 opt isolated inputs power supply from 12 24Vdc 12 24 Vdc 12 24 Vdc at 1 1 gt N N O x x lt m nN Q OQ O r 12 11 10 9 8 7 o A N _ For the digital inputs setup please consult the chapter 11 9 If long distances must be covered the wires connected to the EMA90 needs to be wired in a separate channel from the power supply cables if an intersection occurs between the power supply cable and the analog wires please remember to cross the intersection at 90 degrees in order to cut the generated magnetic fields 20 EMA90 USER MANUAL 8 1 1 DIGITAL INPUTS OPTION This option has 4 digital inputs With this option the instrument will be equipped with 6 digital inputs and 2 digital outputs Do2 12 24Vdc Do2
39. ation at low reflection 2 TASTIERA In the Acquisition Mode the up and down arrows allows to skip through the measuring page of the instrument while in the Setup Mode all the buttons including Enter key allows to program the instrument 12 EMA90 USER MANUAL 4 INSTALLATION 4 1 SAFETY On receipt of the instrument and prior to installation make sure it is intact and has not been damaged during shipment Before installing make sure the operating voltage and mains voltage are compatible The instrument power supply must not be earthed The instrument is equipped with a fuse on the power supply type 5x20mm 315mA 250V Fast es Schurter FSF Always disconnect the instrument from all power sources before opening it for maintenance and or repairs The instrument s capacitor may still be charged even after it has been disconnected from all power sources Maintenance and or repairs must only be carried out by qualified and authorized personnel If in any doubt about the instrument s safety take it out of service and implement the necessary procedures to prevent its inadvertent use Instrument operation is no longer safe A when the instrument shows clear signs of damage B when the instrument does not work C after long storage in extreme conditions D after serious damage during shipment 4 2 OPERATOR SAFETY Carefully read the following pages before installing and using the purchased instrument Maintenance
40. bed on chapter 6 4 EMA90 was developed and tested in accordance with IEC 348 class 1 standards for operating voltages up to 600 Vac rms 6 3 CURRENT INPUTS Connect the instrument following up the wiring diagrams described on chapter 6 4 WARNING before connecting the current inputs to the terminals of the instrument are advised that the maximum allowable current input must be and not exceed 5A with screw able current input in order to avoid negligence operator must first shutdown the system and short circuit the secondary wiring of the current transformer if used and unscrews the current input terminals WARNING to prevent accidentally disconnection of the current input EMA90 is equipped 6 4 WIRING DIAGRAM L1 0 4 Em L26 3 e P 12 L3 o L o No I o o13 Ge e lt E ane S L3 lai 3 wires insertion 2 current transformers Aron o L16 4 L1 QO L2c HE GST L3 6 I eo NO o IHN 1 A 13 aper g Vs 11 us Q L2 e lt L3 e S PI P2 3 wires insertion 2 current transformers and 2 voltage transformers Aron 17 EMA90 USER MANUAL Ll o L2 6 L3o e e e CICR umm 11 m L2 L
41. day fixed the energy is increased in the counter of the next month before of this value the energy is increased in the actual month If the actual month has fewer days than the value fixed the energy will be increased into the next month counter from the last day of the month Period Id period number 15 periods to set different time bands For each period it s possible to program BAND to program the selected period Start Stop to program the start and the stop of the selected period Month is a number from 1 to 12 that defines the months 1 January 2 February ecc of the year corresponding at the start or the end of the selected period Day is a number from 1 to 31 that defines the day of the month corresponding at the start or the end of the selected period 45 EMA90 USER MANUAL WeekDay defines the days of the week in the selected period in which the tariff programming is active Use the LEFT and RIGHT keys to select the day of the week and the UP and DOWN keys to enable or disable the day Time 1 12 defines the time of the day in which the energy counters are subdivided in the 4 time bands P1 P2 P3 P4 to set the time bands are available 8 different times Inside the Time it s possible to set the hour StartHour and the minutes StartMin in which the time band starts Select Type insert the band P1 P2 P3 or P4 to link at the consumptions The set band will fin
42. e W kW MW GW active power L2 W e PF power factor L2 PF Variable reading of phase L3 e V kV RMS voltage L3 phase V3 e A kA RMS current L3 13 e W kW MW GW active power L3 W e PF power factor L3 PFs Voltage and current wave forms L1 line In the L1 Phase V C page are showed the voltage and current wave forms with their peak values and crest factors The wave form of the current has the lower amplitude 32 EMA90 USER MANUAL Voltage and current wave forms L2 line In the L2 Phase V C page are showed the voltage and current wave forms with their peak values and crest factors The wave form of the current has the lower amplitude Voltage and current wave forms L3 line In the L3 Phase V C page are showed the voltage and current wave forms with their peak values and crest factors The wave form of the current has the lower amplitude Variable reading of phase voltage V kV rms voltage between L1 and L2 V1 2 V kV rms voltage between L2 and L3 V2 3 e V kV rms voltage between L3 and L1 V3 1 e percentage of unbalance phase voltage Vunb Note the unbalance voltage appears only if it s defined in setup Variable reading of line voltage e V kV rms voltage L1 V e V kV rms voltage L2 V2 e V kV rms voltage L3 V3 V kV average line voltage Vavg e percentage of unbalance line voltage Vu Note the unbalance voltage a
43. e information warnings that must be followed up by the operator to ensure a right use of the equipment and to maintain the safe operating conditions 1 2 DESCRIPTION The EMA9O is an instrument which has been designed to monitor store and analyze all electrical variable in a distribution line All the relevant data are displayed and if desired stored on internal RAM and transmitted to a remote PC via RS485 standard on which the compatible management software has been installed It is possible to monitor via digital outputs 2 dig out Standard 2 dig out options alarms sirens or strategically factory loads EMA90 with optional harmonic analyzes can carry out network harmonic content analyzes with FFT method up to the 31 harmonic very useful to locate network disturbances The EMA can perform accurate deep and complete energy analyzes A fundamental feature of EMA90 is the easy way to integrate new additional options and the upgrading of the firmware using serial port and flash technology All parameters are displayed on a graphic LCD display light back with a resolution of 128x128 dots Displaying and programming mode are carried out by means of a 5 buttons keyboard 1 3 CE CONFORMITY AND STANDARDS The instrument was tested in compliance with EMC 89 336 EEC and complies with the following standards EMISSIONS EN 50081 2 1992 EN 55022 CLASS B CISPR 22 IMMUNITY EN 50082 1 1992 EN 61000 6 2 SAFETY EN 61010 1 EMA
44. g e Harmonics Up to the 31 harmonics are stored for each line both of voltage and current channels Enable the operator may enable or disable the storing of harmonic values The sampling time is fixed at 15 minutes and it s not modifiable If any of the above mentioned parameters has been enabled for storage by exiting the setup menu a brief message will appear asking the operator to erase all the previous stored data in the memory in order to enable a new recording campaign at empty memory with no residual information s The data downloaded on PC using NRG software or communication protocol does not come deleted and for this reason it s possible to recover them using the function of communication protocol 75 EMA90 USER MANUAL 11 8 DIGITAL OUTPUT The digital outputs can be programmed to function like alarm overload load management for consumption optimization etc or pulses emission for energy calculation or remote activation using software NRG Out Index expresses the number of output from 1 to 6 DO1 and DO2 standard to select or program which are present on the hardware of the instrument Type allows to select the type of functioning as Always Off digital output is always disabled Energy Pulse pulse emission proportional at energy registered and depending the programming used valid only for Energies Min Threshold the output is enabled if the value of the selected variable is lower of the
45. how manufacturing defects of the equipment Not included in the warranty terms are technical interventions regarding equipment installation to electrical systems The manufacturer declines any responsibility for eventual injury or damage to persons animals or things as result of failure to follow the instructions in the user manual or caused by improper use of equipment The expenses of transport as well as the relative risks of same both to and from the place of repair will be the sole responsibility of the user This warranty expires after the date of purchase and any assistance required after said date including spare parts labour transport of personnel and material will be charged to the user following the tariffs in force for Technical Assistance Service at the time of such requested service In any case the replacement of the equipment as well as the extension of warranty after such breakdown is excluded 2 EMA90 USER MANUAL INDEX 1 MAIN INFORMATION 1 1 INTRODUCTION 1 2 DESCRIPTION 1 3 CE CONFORMITY AND STANDARDS 2 TECHNICAL FEATURES 2 1 GENERAL SPECIFICATIONS 2 2 MEASURING METHOD AND ACCURACY 2 3 PROGRAMMABLE PARAMETERS SETUP SECTION 2 4 MEASURED VARIABLES 2 5 CALCULATED VARIABLES 2 6 MEASURING amp CALCULATION FORMULAS 3 INSTRUMENT DESCRIPTION 4 INSTALLATION 4 1 SAFETY 4 2 OPERATOR SAFETY 4 3 MOUNTING 5 INTERNAL BATTERY 5 1 REPLACEMENT INTERNAL BATTERY 6 CONNECTION 6 1 POWER SUPPLY 6 2 VOLTAGE
46. is reason it s not managed The COM1 have two outputs one as RS232 and the other as RS485 standard EIA TIA 422 EIA TIA 485 The COM2 is optional and only RS485 11 5 AVERAGE The AVERAGE menu allows the settings of parameters in the calculation of average values e Sync Avg defines the type of the synchronism for the start and the stop of the average calculation Three mode of use are available Int Rtc use the internal clock as time based line The average calculation start when the clock changes the minute Ext DI use the digital input 2 Di2 to synchronize the start and the stop of the average calculation The digital input will be set as ExtDI automatically Int Ext mixed mode The digital input will be set as ExtDI automatically No congruent operation of digital input type and Sync Avg will involve the visualization of the warning message on the display see for example in this figure e Type defines the type of the window used to the average calculation fixed the updating depends of the Average time or mobile the updating depends of dt Mobile e Time Avg integration time for the calculation of the average parameters e dt Mobile defines the updating time in window mobile of the average parameters 44 EMA90 USER MANUAL 11 6 ENERGY In the ENERGY menu it s possible to modify the unit of measurement of energies to set at the initial value the generic and energy counters to manage on
47. ish when another band will start or at the end of the day For example if the energy consumption from 8 00 to 12 00 are in the band P2 and from 12 00 to 18 00 in the band P3 it s necessary to set 8 00 like start time StartHour and StartMin in TIME 1 with band P2 Type 12 00 like start time StartHour and StartMin in TIME 2 with band P3 Type and 18 00 like start time StartHour and StartMin in TIME 3 with band P1 Type in this way the P1 band will maintain until 8 00 of the day after without other programming P1 band is the most economic and the P4 band is the most expensive e HOLIDAYS Its possible to program the days in the year in which the time bands programmed are not used and the energy consumption end up in the economic band P1 This function can be useful in holiday or in days in which the energy suppliers apply different tariff of others days Its possible to program e Day Index allows to set 52 different days like holidays After the index define the day of the year e Month is the month of the day in programming One number from 1 to 12 defines the month 1 January 2 February etc e Day is the day of the month corresponding at the holyday from 1 to 31 Example New year s day 1 January Day index 1 Month 01 January Day 01 Christmas 25 December Day index 2 Month 12 December Day 25 The consumption of this special feature if used will be saved always into the tariff P1 46
48. monic distortion of voltage L3 phase Thd e Thd total harmonic distortion of current L1 phase Thd e Thd total harmonic distortion of current L2 phase Thd e Thd total harmonic distortion of current L3 phase Thd 8 pages show the harmonic components up to 31 of voltage and current of each line in numerical form Variable reading total harmonic distortion and harmonic components of voltage and current option 6 pages of visualization of THD and harmonic components up to 31 with fundamental frequency 50 60Hz of voltage and current of each line expressed in numerical and graphic form Once entering in the harmonic analyzes page it may be possible with the right enter amp left enter keys to page through the order of the harmonics up to the 31 The pages show the histograms the order of the harmonic and value referred to the fundamental 38 EMA90 USER MANUAL 10 3 STATUS AND INFORMATION PAGES The status and or information pages include e the displaying of clock and internal calendar e the condition of internal RAM memory e the condition of digital I O e warnings e general info of the instrument Clock Calendar e time format hours minutes second hh mm ss e date format day month year dd mm yyyy e dayofthe week Condition internal RAM memory 4 pages selectable with LEFT and RIGHT keys of information on condition internal RAM memory The internal memory is divided
49. nge the bands for the energy counter with time bands The following table shows the time band selected depending of the status of digital inputs DIGITAL INPUT 2 DIGITAL INPUT 1 BAND SELECTED OPEN OPEN P1 CLOSED there is a voltage from 12Vcc and 24Vcc OPEN the voltage is OVcc The change of band happens when the instrument recognizes a change of status on one of digital input at least At the moment of the digital inputs enabling like Periods and at the EMA s turn on with the enabling already set the energy counters increment continue on the last band enabled independently of the digital inputs status until the change of the minute of the internal clock or the change of the status of one of digital input COUNTERS the generic counters are enabled When an input receives a pulse the counter joined at this input is increased by the value that depends of the weight set Ext DI the function depends of the Sync Avg set in the menu AVERAGE par 11 5 If Sync Avg is Int Rtc a signal 12 24Vcc on the digital input 1 change the band from P1 to P2 and vice versa while a signal 12 24Vcc on the digital input 2 is used to synchronize the average and the average powers storing if enabled with a de bounce time of 30 seconds The digital inputs are set automatically to Ext DI if the Sync Avg is set to Ext DI or Int Ext No congruent operation of digital input type and Sync Avg will involve the visualization of the warning mes
50. o set an alarm when the cos is less than e g 0 9 inductive in the direction of 0 inductive it s necessary to set MAX threshold mode Instead of this to set an alarm when cos is more than e g 0 9 inductive in the direction of 0 capacitive it s necessary to set MIN threshold mode In BAND mode there will be alarm when the cos value will be extern to the set band infvalue supvalue the infvalue must be the value nearest at the 0 capacitive Example IND 1 09 08 07 06 05 04 03 02 01 0 Min threshold 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 IND 1 09 08 07 06 0 5 04 03 02 01 0 Max threshold 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 CAP IND 1 09 08 07 06 0 5 04 03 02 01 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 CAP 48 EMA90 USER MANUAL 11 9 DIGITAL INPUT In the DIGITAL INPUT menu it s possible to program the digital input function for both standards and options The 2 standards digital input can be programmed how follow e Type defines the type of operation NOT USED if none input is selected or enabled CLOCK SYNCRONIZATION Synchronization of the internal clock When the impulse arrives on digital input the internal clock s seconds counter is cleared if it s between 00 and 29 while if it s between 30 and 59 it s cleared and the minutes counter go on the next minute Example 17 31 23 hh mm ss will be 17 31 00 08 45 55 hh mm ss will be 08 46 00 PERIOD to cha
51. on line it is possible to exchange information between the instrument and PC PLC or other compatible systems All transmitted characters are in ASCII American Standard Code for Information Interchange format RS485 allows a multi drop connection in order to link up several instruments on the same network on the other hand RS232 allows a single point connection This last connection must be carried out when both systems are turned off and disconnected from the power line in order to avoid damages on the serial output RS232 may be 9 or 25 pin connection please follow up the enclosed table Signal Description DB9 DB25 EMA90 DCD Data Carrier Detect 1 8 RX Receive Data TX Transmit Data DTR Data Terminal Ready 4 20 GND Signal GrouND 5 DSR Data Set Ready joues cp r RTS Request To Send C T j CTS Clear To Send Eu ac j es RI Ring Indicator EI ee 2 The maximum suggested length of a RS 485 connection is about 1200 mt while for a RS232 connection about 5 mt For longer distances cables with low attenuation or connection to line amplifier are recommended Up to maximum 32 units can be wired on the same serial line RS485 exceeding this number it is imperative to insert a signal repeater each repeater can manage up to 32 instruments The polling time is directly proportional to the instruments number connected on the same serial line 8 4 1 RS485 CONNECTION NOT SHIELDED
52. on present month and the two previous consumption of today and the two day previous and total counter of bands In a voice of menu setup paragraph 11 6 it s possible to program times days and months in which the energy count is added at the different bands External signals connected to digital inputs and with a right programming can change the bands in the time Ifthe energy is Heavy the values are displayed in MWh and MVArh Variable reading MIN amp MAX values 12 pages selected by left and right keys show minimum and maximum of the value of 12 parameters taken after last reset Date and time of reading are displayed on these pages It s possible to see the values of these parameters e three phase system voltage gt V e 1 phase voltage V L2 phase voltage V2 L3 phase voltage Vi3 three phase system current gt I L1 phase current l e 2 phase current 1 2 e 13 phase current 1 3 e three phase system active power gt W e three phase system apparent power gt VA e three phase system power factor gt PF e three phase system average active power Wa 37 EMA90 USER MANUAL Variable reading Thd of voltage and current harmonics orders option A page shows the total harmonic distortion of voltage and of current e Thd total harmonic distortion of voltage L1 phase Thd e Thd total harmonic distortion of voltage L2 phase Thd e Thd total har
53. or the time bands These options are both enabled if it s an H instrument the code is on a report These options are disabled if it s an L instrument but one or both can be enabled To make this it s necessary to give the serial number and the option s to enable at Megacon that will send the access code corresponding at the instrument and the selected option s User Page allows to input 5 choosen from a parameters list to visualize in the relative page V Unbalance allows to calculate the voltage unbalance between the line voltage or phase voltage 43 EMA90 USER MANUAL 11 4 SERIAL COMM The SERIAL COMM menu allows the programming of the communication parameters of the COM1 and the option COM2 e Protocol can be chosen between ASCII and MODBUS e Address is the address node or logic number from 01 to 255 in MODBUS or from 01 to 128 in ASCII This number identifies the node in a network and consequently the instrument or the peripheral of a serial multidrop network This parameter is set freely This parameter is set automatically using NRG software with ASCII protocol while with MODBUS protocol it must be set e COM1 COM2 are configured by the following submenus Baud transmission speed programmable from 1200 to 19200 bps Parity parity sequence programmable NONE EVEN and ODD DataBit number of data bits programmable 7 or 8 bit is the type of serial output it s defined by hardware and for th
54. ortional Minimum and maximum can be negative value 51 EMA90 USER MANUAL 11 11 RESET The Reset page allows to cancel some operation or the complete operation of the setup system reset modes are classified in four groups RESET MEASURES reset all values or selected group of measure In particular e All reset all of measures minimum and maximum energy counter time bands e Energies reset total energy counters e TimeBands reset time bands e Min Max reset minimums and maximums Reset Setup delete all definition in the setup and the instrument come back to default setup Reset Storage delete all data stored in the memory Reset Counter delete all counters joined at digital inputs Reset Max Demand delete max demand values Reset Global reset complete of the instrument Setup measures stored RAM 11 12 EXIT SETUP The last voice of the setup menu is EXIT SETUP which allows the operator to leave the instrument setup and go back to the REAL TIME VISUALIZATION PAGES Operator may also exit the setup by pressing simultaneously the RIGHT amp LEFT button one or more time depending of the branch in which you are 12 LIST OF MEASURES To program the variables in setup for digital outputs alarm and pulse analog outputs it s necessary to use these codes 3Ph V Three phase voltage LIN V L1 phase voltage L2N V L2 phase voltage L3N V L3 phase voltage L12 V Voltage between
55. ppears only if it s defined in setup Variable reading of line current e A kA rms current L1 l e A kA rms current L2 l2 e A kA rms current L3 ls e A kA rms neutral current N showed only with connection 4 wires IN 33 EMA90 USER MANUAL Variable reading average line three phase system and neutral current e A kA rms average three phase system current gt lay e A kA rms average current L1 liay e A kA rms average current L2 122 e A kA rms average current L3 l34 e A kA rms average current N Inav Note The average current is calculated in the average time set in the setup The average neutral current will be showed only if the insertion type is 4 wires Variable reading maximum average line three phase system and neutral current e kA rms maximum average three phase system current X e A kA rms maximum average current L1 limaxav e A kA rms maximum average current L2 lomaxav e A rms maximum average current L3 l3maxav kA rms maximum average current N Inmaxav Note The maximum average current is calculated in the average time set in the setup The maximum average neutral current will be showed only if the insertion type is 4 wires Variable reading THD of voltage e Thd total harmonic distortion of voltage L1 phase Thd e Thd total harmonic distortion of voltage L2 phase Thd e Thd total harmonic
56. puts outputs configuration protocol communication etc These information s identify the instrument and its configuration before possible upgrade and for this reason they are very important 40 EMA90 USER MANUAL 41 SETUP 11 1 SETUP ITEMS GENERAL KCT 0 015000 KVT 0 01 5000 Mode 4 wires 3 wires Aron Measure 0 50 sec Warnings Yes No B Light 0 360 DefPage Time 10 900 sec SYNC Mode EXT INT Freq 57500 CLOCK Set Clock Day Light Enable Disable PASSWORD Value 0000 9999 ACCESS 000000 999999 User Page Measure 1 list of parameter Measures list of parameter V Unbalance V V SERIAL COMM Protocol ASCII Modbus Address Modbus 017255 ASCII 01 128 COM1 Baud 1200719200 Parity none even odd DataBit 7 8 Type RS232 RS485 COM2 Baud 1200719200 Parity none even odd DataBit 7 8 Type RS232 RS485 AVERAGE Sync Avg Int Rtc Ext DI Int Ext Type fixed Mobile Time Avg 1 2 3 5 6 10 12 15 20 30 60 dt Mobile 10 20 30 1 2 3 5 10 15 20 30 ENERGY Type Normal Heavy PRESET ENERGIES KWh 0 99999999 9 KWh 0 99999999 9 KVArh 0 99999999 9 KVArh 0 99999999 9 COUNTERS Counter1 0 99999999 9 Counter8 0 99999999 9 TIMEBANDS Update day 1 31 Period Id 01 15 WeekDay Time1 StartHour StartMin Type P1 P2 P3 P4 P5 P6 P7 P8 Time12 StartHour StartMin Type P1 P2 P3 P4 P5 P6 P7 P8 Note HOLIDAYS Day Index 1 40
57. sage on the display see for example in this figure 49 EMA90 USER MANUAL An item selected in the menu TYPE of the digital inputs will be accepted only if the reset of the counters is confirmed Count gt Input define the correspondence between the index of the counter and the digital input It s necessary to set the index of the digital input to join at each counter used The counter isn t able to count if the index inserted is 0 Note lt s possible to join the same input at more counters Counter Name allows to define the name for each counters Using the up and down keys it s possible to choose the counter that will be selected with the Enter key In the same way it s possible to choose and set the name of the counter The first item allows to set a user definition the others are names already fixed USER DEF The name of the counter is defined by the user When this item is selected a field appear to input the name of the counter To input the name it s necessary to use the right and left keys to select the type to modify while its possible to use up and down keys to change it Pressing the up key the sequence of the type is the following ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwx y z SPACE 0 123456 7 8 9 then the sequence begin from A again Naturally pressing the down key the sliding happen on the contrary kWh kWh kVArh kVArh Water
58. situation of the connection of the instrument regarding the connection of current transformer in the current input and the phase sequence for the voltage input If at least one of current transformer is inverted the display shows Warning TA otherwise TA OK If the sequence of phases at voltage inputs is inverted will appear WARNING otherwise Phases sequence OK The message No Info Please Wait appears during the elaboration to establish the phase s sequence The information on phase appears only if the three phase system voltage is higher of 10V otherwise the display shows Low voltage No Info If the voice of menu Setup General Warnings is Yes the warnings page of inversion of current transformer and phases sequence will be display automatically alternatively at the default page each time that happens an inversion The second page shows the situation of internal battery If the voltage level of internal battery is lower of 2 3V on display will appear Battery LOW otherwise Battery This page will be displayed independently of the voice of menu Setup General Warnings when the voltage level is lower of 2 3V Warning If there s no battery or its voltage level is lower than 2 3V the instrument will lose all storing data in RAM minimums maximums energy counter and the setup General info Information page shows the main instrument configuration as model firmware version serial number in
59. the time bands e Type allows to choose the unit of measurement for the energy counter kWh Normal or MWh Heavy e PRESET allows to set at initial value the energy counters and generic counters ENERGIES it s possible to set energy total counters at initial value These values are expressed in kWh and kVArh the visualization on total energies page will be congruent with the type of energy Normal or Heavy The time bands counters don t consider the preset values Only total energy counters consider these values This function is useful for example to compare the consumption with an energy counter already in use COUNTERS it s possible to set the 8 generic counters at initial value e TIMEBANDS it possible subdivide the energy consumption in 12 time bands In this way it s possible to value the energy costs where the energy suppliers apply the time band tariff or it s necessary to divide the consumption in different period To program the time bands function to accede at the TIMEBANDS menu with the following sub menu Update day sets the day in which change the month in the time bands range 0 31 If the value is 0 from the last day of each month the energy is increased in the counter of the next month If the value is between 1 and 15 from the day fixed the energy is increased in the counter of the actual month before of this value the energy is increased in the previous month If the value is between 16 and 31 from the
60. tup Access code for option function and User Page e Synchronization to set the fundamental frequency KCT allows to set the current transforming ratio if CT is used in order to show the measured values in primary terms The KCT range is 0 01 5000 00 EMA90 standard KCT external CT rate If CTs are not used set KCT 1 Le Set the KCT 40 if the current transformer of 200 5A is used EMA90 1A KCT external CT rate 5 If CTs are not used set KCT 0 2 l e Set the KCT 40 if current transformer of 200 1A is used KVT allows to set the voltage transforming ratio if VT is used in order to show the measured values in primary terms The KVT range is 0 01 5000 00 Le Set the KVT 200 if voltage transformer of 20000 100V is used Mode concerns the operation or measuring mode it is possible to select 4 wires 3 wires and Aron following the connection mode as described on chapter 6 4 Measure Time is the filter time in the visualization measure The range is 0 50 The 0 value indicates none average on the measures others values indicates the average time in seconds Warnings enables Yes or disables No the visualization every 15 second of the warnings page alternatively at default page if current transformer connection is wrong or there is an inversion of the phase sequence The condition of battery low it will appear independently of the set of this voice B Light is the time from 0 to 360 seconds in which the display rem

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