Multifunction Meter of active, reactive and apparent Electric Energy
Contents
1. Full Abbreviated OBIS code Comments IDENTIFIERS Vendor ID Vendor 96 1 1 Model ID Model 96 1 2 Version ID Version 96 1 3 Meter number Number 96 1 4 User ID User 96 1 5 Location ID Location 96 1 6 User password Passw 1 0 61 0 Operator password Passw 2 0 62 0 Manufacturer password Passw 3 0 63 0 CALIBRATION CONSTANTS Current and voltage IU cal 96 60 0 Current phase shift ph cal 96 61 0 Active power offset Poffset 96 62 0 Reactive power offset Qoffset 96 63 0 Hilbert s transformation constant Hilbert 96 64 0 Sensitivity threshold Thresh 96 65 0 Clock adjustment factor Clock adjustment 96 66 0 PARAMETERISATION CONSTANTS LED output constant LED out 0 3 0 pulse output constant TM out 0 3 3 Current and voltage transformer ratio Transf 0 4 0 Nominal values and their permissible ranges Nominal 0 6 0 Extended Demand and billing periods IntgPer 0 8 0 Summer Winter time changeover DaySave 0 50 0 Duration of static and cyclic LCD sequences Show tm 0 51 0 Number of tariffs and default on failure tariffs Tariffs 0 52 0 Query period of freely programmed FreePer 0 53 0 channels Power quality monitoring start PQM_beg 0 54 0 Telemetry outputs 50 0 55 0 Temperature range 0 56 0 Passive tariff activation date 0 57 0 Relay 1 0 58 0 Relay 2 0 59 0 Data display formats 0 60 0 INDICATION PROFILES Tariff table Tariffs 13 0 0 Extended Special day t2. Instantaneous quantity OBIS code Current of phase L1 31 7 0 Current of phase L2 51 7 0 Current of phase L3 71 7 0 Voltage of phase L1 32 7 0 Voltage of phase L1 52 7 0 Voltage of phase L1 72 7 0 L1L2 line to line voltage 12 7 1 L1L3 line to line voltage 12 7 2 L2L3 line to line voltage 12 7 3 Total active power 1 7 0 Active power of phase L1 21 7 0 Active power of phase L2 41 7 0 Active power of phase L3 61 7 0 Total apparent power 9 7 0 Apparent power of phase L1 29 7 0 Apparent power of phase L2 49 7 0 Apparent power of phase L3 69 7 0 Total reactive power 3 7 0 Reactive power of phase L1 23 7 0 Reactive power of phase L2 43 7 0 Reactive power of phase L3 63 7 0 Frequency 14 7 0 Total power factor 5 13 7 0 Power factor cos of phase L1 33 7 0 Power factor cos of phase L2 53 7 0 Power factor cos of phase L3 73 7 0 Temperature 130 0 17 Battery voltage 130 0 18 The amount of information that can be accumulated in a single channel depends on the number of activated channels Picture 3 3 shows this dependence CHAPTER 3 DATA REGISTRATION 14000 12000 10000 8000 6000 4000 Number of records 2000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Number of channels Picture 3 3 Channel capacity dependence on number of activated chan
3. 6 4 0 duration s and time left Demand of current integration period Q3 curr 740 until the end of current Q4 curr 840 integration period is S_curr 9 4 0 indicated S_curr 10 4 0 P_last 1 5 0 P_last 2 5 0 On the 4th row on the Q1 last 5 5 0 LCD duration of integ Q2 last 6 5 0 ration period s and Demand of last integration period Q3 last 750 time left until the end of Q4 last 8 5 0 current integration S last 9 5 0 period is indicated S last 10 5 0 Table A 2 continue Demand Data P_dayM1 M8 1 26 M M demand tariff 1 P_dayM1 M8 2 26 M 8 The 4th row indicates Q1_dayM1 M8 5 26 M timestamp The 4th Daily maximum demand Q2 dayM1 M8 6 26 M symbol of OBIS code dayM1 M8 7 26 M indicates the position Q4 dayM1 M8 8 26 M number of day 0 S_dayM1 M8 9 26 M curent day 1 S_dayM1 M8 10 26 M yesterday etc P_monM1 M8 1 16 M M demand tariff 1 P_monM1 M8 2 16 M 8 The 4th row indicates Q1_monM1 M8 5 16 M timestamp The 4th Q2_monM1 M8 6 16 M symbol of OBIS code Monthly maximum demand Q3 monMi1 M8 716M the position Q4 1 8 8 16 M number of month 0 S_monM1 M8 9 16 M current month 1 last S_monM1 M8 10 16 M month etc P_cumM1 M8 1 12 M M demand tariff 1 P_cumM1 M8 2 12 M 8 The 4th symbol of 1 1 8 5 12 OBIS code indicates the Q2 cumM1 M8 6 12 month to which belongs 1 8 712M the data c
4. Name Full Abbreviated OBIS code Voltage in phase L1 under limit occurrence counter Uund_L1 32 32 0 Voltage in phase L2 under limit occurrence counter Uund_L2 52 32 0 Voltage in phase L3 under limit occurrence counter Uund_L3 72 32 0 Voltage in phase L1 over limit occurrence counter Uove L1 32 36 0 Voltage in phase L2 over limit occurrence counter Uove L2 52 36 0 Voltage in phase L3 over limit occurrence counter Uove L3 72 36 0 Frequency under limit occurrence counter f under 14 32 0 Frequency over limit occurrence counter f over 14 36 0 Power outages in phase L1 counter Uoff L1 32 40 0 Power outages in phase L2 counter Uoff L2 52 40 0 Power outages in phase L3 counter Uoff L3 72 40 0
5. clock provides incorrect time data or no data at all the management of tariff schedule becomes impossible because real time is unknown Should this happen the performance of tariff schedule is interrupted and all energy and maximum power data are recorder upon default on failure energy and power tariffs Those default on failure tariffs are defined during the meter parameterisation CHAPTER 5 DATA DISPLAY MODES 5 Data Display Modes All parameterisation constants entered into the meter energy and power demand registers as well as electrical network monitoring data can be displayed on liquid crystal display LCD Data meter displays on LCD sequence of display and other display settings are completely configurable parameters Data display is organized in the following way 1 All the data are divided into data groups called sequences a One sequence can contain up to 32 data to display Data available to display on LCD are listed in appendix A b Sequence is recognized by the caption of the sequence see picture 2 3 Caption is set of 11 ASCII symbols c Meter supports up to 32 sequences for automatic data display and up to 32 sequences for manual data display There are two modes of data display automatic cyclic data indication mode and static data indication manual data display 5 1 Automatic Cyclic Data Indication Mode While the meter is operating in its usual mode selected data or parameters are display
6. 24 4 3 TARIFF SEASONS nag 1 ae bate eee 24 le Mc 25 4 5 TARIFF MODULE OPERATION IN CASE OF CLOCK FAILURE 25 DATA DISPLAY MOD ES i doa oret peo Ri 26 5 1 AUTOMATIC CYCLIC DATA INDICATION 400 nennen 26 5 2 STATIC DATA INDICATION MODE tiv RE tee o etc Annie o rore Cr pe iv in REO 26 5 3 DATA REVIEW AL CORTAM O sans eletti peti e b p ese de tr pe S e ted e EUR E eun 26 BABAMEFERISATION en ee 28 METER DATA PROTECTION ae ee ee 29 7 1 PHYSICAL PROTECTION OF DATA AND 8 0 29 1 2 SOFTIW RE PROTECTION 29 TDW PaSSWOF uir ent 29 7 2 2 Lock of optical interface optional eese 29 7 2 3 Event logbook eise ee ee Pepe eene dnos 29 7 2 4 COUNlers and Eimers E 30 7 2 5 Protection of Factory Constants sess nates teneret nnns 30 ANNEX A DATA AVAILABLE TO DISPLAY 8 31 1 Purpose and Features The EPQS
7. ms gt 30 External backup power supply 12V Tariff module number of energy tariffs programmable 1 8 number of maximum demand tariffs programmable 1 8 Data storage without power supply 20 years t 20 C 2 years t 60 C Backup supply of internal clock Li battery Battery resource for not connected meter gt 5 years Insulation pulse voltage test IEC 60060 1 6kV alternating voltage 4kV Operating temperatures 40T 606 Storage and transportation temperatures 50C 70 Weight Kg lt 1 5 Dimensions mm 325 x 177 x 55 CHAPTER 2 METER DESIGN 2 Design 2 1 Case Picture 2 1 presents the external view of the device LERTROS 5 E ERERGIIOS 9 171 21 Picture 2 1 Meter exterior 1 Transparent cover 6 Optical communication interface 2 Sealed screws 7 Terminal block cover 3 Meter panel 8 Button 4 Liquid Crystal Display 9 Light emitting diode LED 1 5 Display control photo sensor 10 Light emitting diode LED 2 The meter panel is covered by transparent cover moulded from UV ray stabilised polycarbonate cover providing protection from external mechanical factors and moisture The cover is fixed to the case by two sealed screws The liquid crystal display LCD is located in the frontal part of the meter It allows the display of all values stored in the memory instantaneous values and parameters On the lower left a display co
8. 10 T is also possible to Daily reactive energy of Il quadrant R2day T1 T8 TX 6 10 T review energies over Daily reactive energy of IIl quadrant R3day 1 8 TX 7 10 T previous days Daily reactive energy of IV quadrant R4day T1 T8 TE 8 10 T Daily positive apparent energy Wday T1 T8 TX 9 10 T Daily negative apparent energy Wday 1 8 10 10 T Positive active energy of integration period A_per 1 29 0 Negative active energy of integration period A_per 2 29 0 It is also possible to Positive reactive energy of integration period R_per 3 29 0 review energies Negative reactive energy of integration period R per 4 29 0 previous integration Energy of quadrant of integration period R1 per 5 29 0 periods The 4th row on Energy of Il quadrant of integration period R2 per 6 29 0 the LCD screen Energy of 1 quadrant of integration period R3 per 7 29 0 indicates timestamp of Energy of IV quadrant of integration period R4 per 8 29 0 the displayed data Positive apparent energy of integration period W 9 29 0 Negative apparent energy of integration period W 10 29 0 APPENDIX DATA AVAILABLE TO DISPLAY ON LCD Table A 2 Demand Data Name Abbreviated OBIS code Comments P_curr 1 4 0 On the 4th row on the P_curr 2 4 0 LCD screen the Q1_curr 5 4 0 integration period Q2
9. Current and voltage transformer ratios Operator Values of nominal minimum and maximum voltage current and frequency Operator Integration period duration Operator Beginning of settlement period Operator Clock adjustment to daylight saving changes Operator Duration of cyclic data indication User Duration of static data indication User Number of activated energy and demand tariffs Operator Activation of passive seasons Operator Tariff application order Operator Measurement period of freely programmed channel Operator Start of power quality monitoring Operator Telemetry outputs Operator User password User Operator password Operator Daily tariff schedules Operator Static indicator sequence tables User Cyclic indicator sequence tables User Static indicator sequence headings User Cyclic indicator sequence headings User Special days Operator Week programs Operator Active tariff seasons Operator Passive tariff seasons Operator Freely programmed channels Operator Formats of data output to display screen Operator Annex A Data available to display on LCD Table A 1 Energy Data Name OBIS Full Abbreviated code comments Total positive active energy Atot_T1 T8 TX 1 8 T Total negative active energy Atot T1 T8 TX 2 8 T Total positive reactive energy Rtot_T1 T8 TE 3 8 T T energy tariff 1 8
10. meter is a multifunction device for measurement of electric energy CT operated meters comply with requirements of IEC 62053 22 standard class 0 5 or 0 2s The meter data structure is compatible with DLMS standard Each measured parameter has its OBIS OBject Identification System code describing the parameter or value OBIS codes together with allocated parameters are transmitted through the communication interfaces and displayed on the meter LCD display screen The meter measures registers and collects data on active energy of both directions A A reactive energy of both directions R R reactive energy in four quadrants R1 R2 R3 R4 and apparent energy of both directions W W The meter also registers maximums of average power collects load profiles and registers cumulative powers Besides the aforementioned values the EPQS meter can display or transmit via its communication interfaces the following profiles stored in any of 16 freely programmed channels phase and line voltages currents instantaneous active reactive and apparent power frequency power factor cos It can also analyze power quality and generate weekly reports of power grid quality Up to eight of energy and the same number of power maximum tariffs can be activated for tariffication of energy and power The structure of tariff module lets adapt the meter for virtually any of existing tariff program For remote data transmission the meter has tw
11. priorities for communication interfaces and a certain priority of one or another interface is determined by the following rules e Optical interface has higher priority than electrical e f request is received through the optical interface while a communication session is going on through the electrical interface communication through electrical interface is interrupted and a request received through the optical interface is carried out Communication through the electrical interface is not interrupted only if an answer to a request is currently transmitted through electrical interface In that case communication is interrupted only after the answer has been sent 2 5 The Meter Inputs and Outputs 2 5 1 Optical LED Output Red Light Emission Diodes The optical LED output is located on the front panel It is used for the meter calibration and verification The LED emits light signals whose frequency corresponds to calculated electrical energy LED signals are generated by the meter CPU Meter constant is the main parameter of the LED output The meter constant means a number of light signals emitted by LED for 1 kWh 1 kVAr or 1 kVA of electrical energy The EPQS meter has two optical LED outputs The meter constant is set by the manufacturer Both LED outputs can generate signals for active reactive or apparent electrical energy and the first output see Diagram 2 1 can additionally transmit the meter clock time signals in order to estimate
12. time count error Table 2 3 lists LED output parameters CHAPTER 2 METER DESIGN Table 2 3 LED output parameters Meter constant imp kWh imp kVArh 1 65000 Pulse duration ms 30 Pulse duration for clock testing s 0 5 Pause between pulses while testing clock s 0 5 2 5 2 Pulse Output contacts Meter pulse output contacts transmit telemetry pulses for energy accounting systems The EPQS meter has six pulse outputs See picture 2 4 Outputs can be programmed for any kind of energy A A R1 R2 R3 R4 A R A and R outputs are not programmable Table 2 4 lists output parameters Outputs are galvanically separated Table 2 4 Characteristics of outputs Maximum voltage V 220V Minimum voltage V 10V Maximum current mA 100 Output constant imp kWh imp kVArh imp kVAh 1 130000 Pulse duration ms 10 250 Pause between pulses ms 10 250 The parameters of pulse outputs must be set in a way that the following inequality is met 3 6 10 N f T as i I rax K output constant imp kWh imp kVArh or imp kVAh N number of measuring elements t pulse duration sec t pause duration sec Uax maximum permissible voltage of electricity network m laa maximum load current 2 5 3 Relay Outputs Optional The EPQS meter may have up to two built in electronic semiconductor relays The relay output can be programmed to operate on the following condition
13. with external units i e computer or manual data reading terminal the EPQS meter has standard optical and electrical communication interfaces 2 4 1 Optical Interface DO This interface is used for the meter parameterisation and for transferring of data stored in the meter to a data reading terminal or portable PC with a QuadrCom software installed in it The optical interface transfer protocol is IEC 62056 21compatible The maximum transfer rate is 9600 bps 2 4 2 Electrical communication Interface This interface is used for the meter parameterisation and for data transfer via local network The electrical communication interface implements IEC 62056 31transfer protocol The maximum data transfer rate is 19200 bps There can be following implementations of electrical interface RS 232 e RS 485 e Current loop interface CL 2 4 3 Auxiliary Communication Interface optional The following auxiliary communication interface that operates independently from the optical and the first electrical interfaces can be built in upon a request e Current loop interface CL2 e Electric interface RS 485 e Electric interface RS 232 2 4 4 Interface Priorities Communication through the optical interface DO and the first electrical interface is provided by the same single universal asynchronous receiver transmitter unit UART so it is impossible to use both interfaces for data transfer concurrently The meter has strict software defined
14. Multifunction Meter of active reactive and apparent Electric Energy EPQS User Manual Version 5 ELGAMA ELEKTRONIKA Lithuania 2007 ELGAMA ELEKTRONIKA EPQS Multifunction Meter of Active Reactive and Apparent Electric Energy User Manual ELGAMA ELEKTRONIKA Ltd Visoriu str 2 LT 08300 Vilnius Lithuania Tel 8 5 2375 000 Fax 8 5 2375020 e mail info elgama eu This user manual describes the electronic multifunction EPQS meter of electric energy and the use of the meter Please read this document carefully before installing and using the meter The manufacturer s warranty shall not apply if the meter is damaged as a result of failure to comply with the requirements described in this manual or registration certificate or those of work safety The manufacturer shall not be held liable for any kind of loss incurred by the meter parameterization performed not following instructions described in the users program as well as recommendations and State defined tariffs The manufacturer shall be not held liable for any damage related to partial or total data loss due to unprofessional actions of authorized persons This user manual describes all possible features functions and auxiliary outputs of the electrical energy meter Your meter might not have some features functions or auxiliary outputs described in this document The exact configuration features accessories and connection diagram o
15. Therefore there are a few possibilities to end billing period manually e By pushing button in position Cumulation Reset e Sending command via optical interface communication protocol IEC 62056 21 e Sending command via electrical interface communication protocol IEC 62056 31 When user pushes button Cumulation Reset or sends command via communication interface a message Cumulative Reset is displayed on the first line of the LCD Billing period can be manually ended only once per calendar month If user attempts to end billing period second time per calendar month a message Blocked is displayed on first line of the LCD If billing period is ended manually meter does not ends billing period automatically at the end of that calendar month CHAPTER 4 TARIFF MODULE 4 Tariff Module The EPQS meter supports up to 8 energy and 8 demand tariffs The number of energy and demand tariffs is set during parameterisation Tariff module of the meter provides multi tariff accounting according to meter s tariff program Owner of the meter can change and configure tariff program operator password required Tariff program is designed from 3 levels e Day program e Week program e Tariff seasons 4 1 Day program Day program is schedule that describes tariff switching during a day Each tariff switchover is described by one record in day program It contains time of switchover number of energy tariff to be activated
16. Total negative reactive energy Rtot T1 T8 TE 4 8 T T 0 sum of all tariffsit Total reactive energy of quadrant Ritot_T1 T8 TX 5 8 T em Total reactive energy of Il quadrant R2tot T1 T8 TX 6 8 T registered at the end of Total reactive energy of IIl quadrant R3tot T1 T8 TX 7 8 T previous billing periods Total reactive energy of IV quadrant R4tot T1 T8 T 8 8 T months Positive apparent energy Wtot_T1 T8 T 9 8 T Negative apparent energy Wtot T1 T8 TX 10 8 T Monthly positive active energy Amon_T1 T8 TX 1 9 T Monthly negative active energy Amon T1 T8 T 2 9 T Monthly positive reactive energy Rmon T1 T8 TX 3 9 T Monthly negative reactive energy Rmon T1 T8 Tx 49 T 2 a en Monthly reactive energy of quadrant Rimon T1 T8 TX 5 9 1 is also possible to Monthly reactive energy of Il quadrant R2mon T1 T8 TX 6 9 T review energies over Monthly reactive energy of IIl quadrant R3mon T1 T8 TX 7 9 T previous billing periods Monthly reactive energy of IV quadrant R4mon T1 T8 TX 8 9 T Monthly positive apparent energy Wmon_T1 T8 TX 9 9 T Monthly negative apparent energy Wmon T1 T8 TX 10 9 T Daily positive active energy T1 T8 TX 1 10 T Daily negative active energy Aday T1 T8 TX 2 10 T Daily positive reactive energy Rday_T1 T8 TX 3 10 T Daily negative reactive energy Rday_T1 T8 TX 4 10 T 22 Daily reactive energy of quadrant Riday_T1 T8 TX 5
17. able Specday 11 0 0 Extended Programmed channels 130 0 K K channel No PARAMETERISED PROFILES Day profiles 99 60 0 Static indication sequence table 99 61 0 Cyclic indication sequence table 99 62 0 Static indication sequence headers 99 63 0 Cyclic indication sequence headers 99 64 0 Special days 99 65 0 Week profiles 99 66 0 Active tariff seasons 99 67 0 Passive tariff seasons 99 68 0 Programmed channels 99 69 0 Table 5 Events and States Name Anbreviaisd OBIS code Comments Voltage of all phases Power 140 0 1 State Voltage in phase L1 U L1 140 0 2 State Voltage in phase L2 U L2 140 0 3 State Voltage in phase L3 U L3 140 0 4 State Meter error Error 140 0 5 Event Meter reset Reset 140 0 6 Event Watchdog reset WatchDg 140 0 7 Event Incorrect operation Illegal 140 0 8 Event Effect of magnetic field Magnet 140 0 9 State Effect of unfavourable temperature Temper 140 0 10 State Wrong password access blocked Blocked 140 0 11 State Manufacturer access granted VendorA 140 0 12 State Case open Cover o 140 0 13 Event Clock adjustment Clock s 140 0 14 Event Reset of cumulative demand data Cum res 140 0 15 Event Remote parameterisation Conf re 140 0 16 Event Local parameterisation Conf lo 140 0 17 Event Summer time Summ
18. al Conversion From the measurement module the analog voltage and current signals further go to a 6 channel ADC Analog to Digital Converter Sigma Delta integrator The integrator converts the analog signals into digital 16 bit codes 72 times during a single AC period A logical multiplexer unit integrated in the same chip combines signals of different phases into a single sequence of digital codes 2 3 3 Central Processor Unit Multiplexer unit output codes are further sent to the central processor unit CPU where they are multiplied by calibration constants entered during calibration Based on the result the processor then calculates square voltage and square current for each phase and voltage with 90 phase shift necessary for calculating of reactive energy I I I2 U2 U2 U2 U U U From these values active reactive and apparent powers and energies are calculated The CPU also acts as a controller of memory unit LCD and communication interfaces generates calibration LED signals and performs other functions CHAPTER 2 METER DESIGN 2 3 4 Non volatile RAM Unit With exception of instantaneous values all meter data are stored in non volatile RAM NVRAM unit This FLASH type memory unit does not require any power supply for data storage The data are written to the memory at the end of each integration period day or month and in case of power failure 2 3 5 Internal Clock The meter has a built in in
19. and number of demand tariff to be activated Switchover time must be sinchronised with hour raster One day program supports up to 16 switchovers Meter supports up to 127 different day programs Energy tariffs and demand tariffs can be changed independently That means switching energy tariff it is not necessary to change demand tariff and visa versa Table 4 1 shows an example of the day program Table 4 1 An example of day program Day program 1 07 00 T2 M2 09 00 T1 M1 12 00 T2 M2 19 00 T1 M1 21 00 T2 M2 23 00 T4 M4 4 2 Week program The week program describes what day program is assigned for each day of week Week program is a list containing 8 numbers of them determines which day program is activated for each day of the week and for days off Up to 32 different week programs can be created Different day programs may be applied for each day of week or the same day program may be applied throughout the whole week Table 4 2 shows an example of week program Table 4 2 An example of week program Monda Tuesda Wednesday Thursda Frida Saturda Sunda Days off 1 1 1 1 1 1 2 2 2 4 3 Tariff Seasons Tariff seasons let to change tariff application order several times per year i e activate different week programs on different seasons A season defines date and time when necessary week program is activated Active and passive season program can be created eac
20. arts at 2 AM and ends at 3 AM The clock is adjusted by the specified offset e Only month is set In this summer time starts at 2 AM on the last Sunday of the month specified and ends at 3 AM on the last Sunday of the month specified The clock is adjusted by the specified offset e No adjustment date time is specified In this case summer time starts at 2 AM on the last Sunday of March and ends at 3 AM on the last Sunday of October e Changes are disabled No clock adjustment is made Note both date and time formats for summer time start and end must match 2 3 6 Liquid Crystal Display LCD The meter has a built in alohanumerical 64 symbol four line LCD with backlight The display can be conventionally divided into 13 information fields Picture 2 3 shows LCD information fields Table 2 1 Information fields of LCD 1 Caption of the sequence 8 Measurement unit 2 Number of readout in sequence 9 Indicators of load quadrant for each phase 3 Display mode indicator 10 Active energy tariff 4 Number of readouts in current sequence 11 Active demand tariff 5 Abbreviated name of readout 12 Indicator of phase sequence 6 Readout OBIS code 13 Extended review available indicator 7 Value Warnings and error messages are shown on first row of LCD every 2 seconds changing For detailed information about data review on LCD see chapter 5 2 4 Communication Interfaces For data exchange
21. dependent real time clock that counts real time hours minutes seconds date year month day week day generates control signals corresponding to 8 tariff time zones T1 T8 M1 M8 In case of disconnection of the meter s power supply the clock is powered from a built in lithium battery After a shutdown of the electricity network the clock preserves the tariff time zone control function and counts time for a period of no less than 10 years If the power supply is restored after that period has passed the meter will perform as a single tariff device and the data will be assigned to the tariff zone specified during the parameterisation It can be any of activated energy or power tariffs The internal clock has a quartz resonator temperature error compensator The clock can be corrected by programming the meter as well The correction range is 20 20 seconds but the annual cumulative correction value cannot exceed 10 min The clock can automatically adjust for summer time The date and time of the start and end of summer time are stored during the meter parameterisation The adjustment time must be set in the MM DD HH month day hour format The adjustment offset in hours must also be set There are the following options of adjustment to daylight time e Adjustment month day hour and offset are set At the specified moment the clock is adjusted by the specified offset e Month and day are set In this case summer time st
22. each parameterisation it is necessary to download all data to a computer because some accounting data might be erased from the memory during the parameterisation Table 6 1 lists what data on what conditions are erased from the memory during the parameterisation Table 6 1 Monthly energy Changed parameters monitoring report Daily max E E 5 2 a channels Date and Time s integration period fh Start date of quality monitoring Other parameters T oO J e T CNET Daily energy 7 Meter Data Protection The EPQS meter has features of physical and software protection of data and parameters from unauthorised actions 7 1 Physical Protection of Data and Parameters The meter is protected from an unauthorised access by the following physical measures Sealed front cover Sealed terminal block Registration of cover opening actions in event logbok The sealed front cover moulded from transparent plastic restricts the access to the meter circuitry located under the front panel The transparent plastic cover is fixed by two sealed screws One screw is sealed with the manufacturer s seal the other with metrology centre seal The terminal block is sealed after the meter is installed at the user premises The sealing is performed by a representative of the organisation that i
23. ed on the screen at certain intervals In this indication mode display mode indicator is blinking symbol The data to be displayed their sequence and screen refresh period is defined during the parameterisation Time of single readout display can be 1 600 s Automatic cyclic data indication mode is activated after no control signals are received specified time interval called static indication time The sequence type indicator indicates automatic cyclic data indication mode See chapter 5 3 Data Review Algorithms for instructions how to switch between sequences in automatic cyclic indication mode 5 2 Static Data Indication Mode When this mode is active data are called up by actuating the control photo sensor by means of long and short signals In static data indication mode display mode indicator is symbol A signal is considered long if its duration is 2 s A signal is considered short if its duration is 0 5 s The static mode is activated by means of long signal and the cyclic indication mode if activated automatically if no signals are received during the specified time interval called static indication time This interval is defined during the parameterisation and can be from 1 s to 600 s For data review algorithm in static indication mode see the chapter Data Review Algorithms 5 3 Data Review Algorithms Picture 5 1 shows a data review algorithm demonstrating the way of activating the necessary cyclic
24. er 140 0 21 State Reverse phase sequence L132 140 0 22 State MKI 1 relay state MKI 1 140 0 23 State MKI 2 relay state MKI 2 140 0 24 State Reset of daily energy data Eday re 140 0 25 Event Reset of monthly energy data Emon re 140 0 26 Event Reset of daily maximum demand data Pday re 140 0 27 Event Reset of monthly maximum demand data Pmon re 140 0 28 Event Clock 1 0 0 Temperature 130 0 18 Battery voltage 130 0 18 Table A 6 Timers and Counters Name Full Abbreviated BIS code Meter operation timer Work tm 96 70 1 Battery operation timer Batt tm 96 70 2 Timer of magnetic field effect duration Magn tm 96 70 3 Timer of unfavourable temperature effect duration Temp tm 96 70 4 Three phase voltage failure counter Outages 96 70 5 Magnetic field effect counter Magn ct 96 70 6 Unfavourable temperature effect counter Temp ct 96 70 7 Billing period counter Account 96 70 8 Cover opening event counter Cover o 96 70 9 Wrong password counter Passw e 96 70 10 Clock adjustment counter Clock s 96 70 11 Counter of cumulative power demand data reset Cum res 96 70 12 Remote parameterisation session counter Conf re 96 70 13 Local parameterisation session counter Conf lo 96 70 14 Watchdog reset counter WDg res 96 70 15 Illegal operation counter Ill ops 96 70 16 Meter reset counter Err res 96 70 17 Meter error counter Err cnt 96 70 18 APPENDIX A DATA AVAILABLE TO DISPLAY ON LCD Table A 6 Energy Quality Monitoring
25. etween phases of voltage and current Reactive Picture 3 1 The Way of Determining of Energy Quadrant On the meter LCD the load quadrant is indicated by different signs and letters CHAPTER 3 DATA REGISTRATION The following electrical energy values are accumulated and stored in the meter memory e Integration period energy Daily energy by all tariffs and total e Monthly energy by all tariffs and total e Total energy of each tariff and sum of all tariffs 3 2 Demand registration The meter calculates average power over integration period and based on the calculated data determines and registers maximum demands with their respective timestamps The EPQS meter registers values of maximum demand of active P P reactive Q1 Q2 Q3 Q4 and apparent 5 S power of each demand on daily and monthly basis Monthly maximum demand values are stored in monthly profiles and daily maximum demand in daily profiles see above The meter collects load profiles of active A and A reactive R1 R2 R3 R4 apparent W W energy The values of average power of integration period are stored into appropriate load profile registers of FLASH memory after the end of an integration period The meter memory can hold at least 8190 of values of average power of integration period for each kind of energy The duration of load profile data storage in the meter memory depends on the duration of integration period The duration of inte
26. f the meter is provided in its registration certificate CHAPTER 2 METER DESIGN o Table of Contents oP JR POSE AND FEATURES Uc conc spec aha 7 1 1 MARKING OF METER MODIFICATIONS ennt nennen ndn teni intenti sene nne 8 1 2 TECHNICAL SPECIFICATIONS 5 1 3 C22 En en en Mil dares Else nn eee ee cited 9 Mec an 10 UNI I EEIEULEA 10 2 2 GENERAL REQUIREMENTS AND INSTALLATION PROCEDURE 1 6 11 2 3 ELECTRONIC CIRCUITRY AND PRINCIPLES OF OPERATION 13 2 3 1 Measurement module 9699 13 2 3 2 Analog to Digital Signal 13 23 9 Central Processor UNN ERR ERE 13 2 3 4 Non volatile RAM nnne 14 2 3 5 14 2 3 6 Liquid Crystal Display 2 2 2 2200000000000 80 einsehen tnnt a aaia P FAAEA nnne rnt nnn nnn 14 2 4 COMMUNICATION 2 0 enne nn 15 2 4 1 Optical Interface D0 1 3 541 22 Te Ee Ba un 15 2 4 2 Electrical communication In
27. gration period can be set from 30 s to 3600 s at 1 s step The integration period is set upon the condition that the time interval of 1 hour can be divided into a whole number of integration periods Days Integration period min Picture 3 2 Load profile length dependency on integration period 3 3 Registration of Instantaneous Values For registration of instantaneous values the EPQS meter provides 16 freely programmed channels Table 3 5 lists values that can be registered by those freely programmed channels A freely programmed channel is an area in the meter FLASH memory A time interval between the two successive moments of registration of chosen value is called query period In the case of EPQS meter all freely programmed channels have a common query period that can be set from 30 s to 3600 s during parameterisation The query period must be set so that the time interval of 1 hour can be divided into a whole number of query periods The values are registered in freely programmed channels by one of the following algorithms At the time intervals of query period an instantaneous value of chosen parameter is registered e The minimum value over the query period is registered e The average value over the query period is registered e The maximum value over the query period is registered Algorithm is set independently for each channel Table 3 3 List of data available to log into programmable channels
28. h describing up to 16 seasons The active season profile is a season profile used at the present moment The passive season profile is a season profile currently inactive but becoming active at the specified year month day and hour The passive schedule lets to enter a new tariff schedule beforehand keeping the active schedule and switch to it at some moment in the future Table 4 3 shows an example of active season profile Table 4 3 An example of tariff seasons Date time Week program 04 01 00 00 2 05 01 00 00 3 09 01 00 00 2 10 01 00 00 1 4 4 Special days The meter has a special day register When a new special day is entered into the register the date and day profile applicable on that day is specified Each special day can be allocated a different day program or several special days can share the same day program The special day register holds up to 256 days If a year is specified besides a month and a day during the creation of a new special day entry this day shall be treated as a special day only in the specified year Table 4 4 shows an example of special day list Day Day program 2004 03 31 2004 04 01 01 01 02 16 03 11 12 25 12 26 4 5 Tariff Module Operation in Case of Clock Failure The tariff module manages tariff schedule on the basis of data received from a real time clock In the case of clock failure i e
29. indication sequence The diagram also shows algorithms for data review in static indication mode After the meter switches to cyclic indication mode it activates a cyclic indication sequence with the same number as the sequence of static indication mode that was active before the switchover If no cyclic indication sequence bears that number the first sequence is activated If the first static indication sequence has been activated the cyclic indication mode does not activate automatically Sequence switchover algorythm in cyclic indication mode Data review algorithms L static indication mode ee 9 O Cyclic indication sequence C Header of static indication sequence Readout of static indication sequence Q Readout in Extended review gt Short light signal Long light signal Picture 5 1 Data scrolling diagram When the meter operates in cyclic indication mode the sequences can be switched by means of short light signals When the meter operates in cyclic indication mode static indication mode is activated by means of long light signal CHAPTER 5 DATA DISPLAY MODES 6 Parameterisation The EPQS meter is parameterised through the optical or first electrical interface For parameterisation QuadrCom software developed by ELGAMA ELEKTRONIKA Ltd is used Each parameterisation session is recorded in the event logbook together with timestamp Before
30. ive demand P P Q1 Q2 Q4 5 5 by all tariffs M1 M8 Date time stamp of the end of billing period RAIN The number of monthly profiles stored in the meter memory depends on the number of demand and energy tariffs Table 3 2 lists the maximum number of monthly profiles that can be stored at given number of energy and demand tariffs Table 3 2 Number of Monthly Profile Records Stored in the Memory Number of demand tariffs gt o po a E 2 J 8 107 94 84 76 69 64 58 54 3 1 Energy Registration The EPQS meter measures active electrical energy in both directions and A reactive electrical energy in each quadrant R1 R2 R3 and R4 apparent electrical energy in both directions W and W All measured values of those parameters are stored in RAM memory unit At the end of integration period or in case of power failure those values are written into appropriate FLASH memory registers During the registration the appropriate quadrant into whose register data must be written is determined by the direction of active electrical energy and the sign of reactive electrical energy Diagram 3 1 shows the way of determining of the energy and power quadrant by the signs of active and reactive electrical energy Reactive Active Active I Il Il IV quadrants S apparent power Q reactive power P active power q angle b
31. l dimensions and distances between the mounting holes are shown in picture 2 2 The meters are connected according to the scheme shown on the cover of the meter terminal box diagrams Picture 2 4 shows the general connection of EPQS meters through current and voltage transformers Regular verification of the meter shall be carried once in eight years Only natural or legal persons authorised by the manufacturer can repair the meter Picture 2 2 The Overall Dimensions and Mounting Holes of EPQS Meter CHAPTER 2 METER DESIGN Ko 0 12V S0 outputs Test Relay outputs Picture 2 4 Wiring diagram 2 3 Electronic circuitry and principles of operation Control photosensor 189 INTERFACE d Electrical Interface me Protection Power Reference circuits L voltage supply To suplied circuits Picture 2 5 Block diagram of the meter 2 3 1 Measurement module The measurement module converts the electricity network voltage and current values to corresponding analog signals The voltage value is converted by a resistive voltage divider and the current value is converted by a precise current transformer Firmware of the central processor unit compensates a phase shift in the current measurement circuit The voltage and current of each phase is measured by a separate respective measurement module further referred to as measurement element 2 3 2 Analog to Digital Sign
32. ltage power supply It ensures smooth operation within the permissible voltage range from 50 V to 260 V of network voltage The power supply protects the meter from brief lightning type voltage surges and is not associated with any single phase so the meter is operating as long as there is voltage at least in one phase If the ground terminal is disconnected the meter is operating as long as there is voltage at least in two phases The power circuit incorporates a high capacity capacitor A special circuit checks its voltage and if it drops below a certain critical value the CPU writes vital data on the meter state and measured values to FLASH memory After the voltage is on again the meter restores its state variables from the stored data switches tariffs if necessary and resumes measurements In that way the meter data are reliably protected from unexpected consequences of power failure 2 7 Push Button Meter has bifunctional push button see picture 2 1 There is possibility to seal button in position A see fig 2 1 so that switching to position B without damage of seal is impossible In position A push button is used to display specific information on LCD Button provides following commands e short signal push and hold button for 0 5s e long signal push and hold button for 2s Signals user provides by push button are identical to signals user provides to photosensor For detailed information about data display on LCD and readou
33. n the power supply voltage drops below a critical level At the end of each demand interval energies of this period A A R1 R2 R3 R4 W W are written into the FLASH memory From that data a profile of average power demand of integration period i e load profile is formed At the end of each day a daily profile is written into appropriate FLASH memory registers This profile consists of the following data 1 Daily energy consumption A A R1 R2 R3 R4 W W by all tariffs T1 T8 2 Daily maximum demand P P Q1 Q2 Q4 S S by all tariffs M1 M8 3 Timestamps of daily maximum demands The number of daily profiles stored in the meter memory depends on the number of activated demand and energy tariffs Table 3 1 lists the maximum number of daily profiles that can be stored in the memory when a certain number of energy and power tariffs are activated Table 3 1 Number of Daily Profile Records Stored in the Memor Number of demand tariffs gt o po a E At the end of each month a monthly profile is written into the non volatile memory This profile consists of the following data 1 Total energy A A R1 R2 R3 R4 W W by all tariffs T1 T8 Monthly energy A A R1 R2 R3 R4 W W by all tariffs T1 T8 Monthly maximum demand P P Q1 Q2 Q3 Q4 S S by all tariffs M1 M8 Timestamps of monthly maximum demands Cumulat
34. nels In order to calculate how many days a record will be held in a freely programmed channel formula 1 is used E max int 1440 T Duration of record storage in days N rax Channel capacity see chart 3 3 tn Measuring interval duration in minutes 3 4 Power Quality Registration The EPQS meter can register several parameters of power quality During the parameterisation the permissible range of electrical network voltage and frequency fluctuations is set together with power quality monitoring start date At the date and time specified the meter starts calculating the average frequency value each 10 seconds and the average voltage value each 10 minutes The meter registers periods when the average frequency or voltage value does not comply with requirements set during parameterisation and calculates voltage failures on each phase According to the calculated data the following quality parameters are established e Time percentage when the network voltage and or frequency did not meet the requirements at least in one phase e Number of power outages in each phase Power quality parameters are recorded in weekly reports The meter memory can hold up to 256 weekly reports of power quality Power quality measurement methods described in this document comply with the requirements of EN 50160 European Standard 3 5 End of billing period Meter automatically ends billing period at the end of calendar month
35. nstalled the meter 7 2 Software Protection The meter has software measures of data protection and the event logbook for recording parameter changes and attempts to affect the accuracy of calculations 7 2 1 Password All data stored in the meter are password protected and have various access levels There are two levels of access to the meter data and parameters user level allows data review and changing of some parameters and operator level allows review of all data and changing of almost all meter parameters The user password grants rights to change only some of the parameters Table 7 1 lists parameter access levels Each time the connection is established through the communication interfaces the meter asks the password The password consists of any 8 symbols No parameters can be changed until the correct password has been provided If incorrect password is entered four times in a day the communication interfaces will be locked for 24 hours During that period communication is impossible 7 2 2 Lock of optical interface optional On the user request meter can be equipped with function lock of optical interface There are following types of lock e Full lock User is not allowed to communicate with meter until interface is unlocked e Lock of parameters User is not allowed to change meter parameters but permitted to read all the meter data To unlock optical interface user needs to push and hold button in position B fo
36. ntrol photo sensor is located In order to display specific information on the display a corresponding light signal must be transmitted to the photo sensor The DO optical interface is located on the right side of the frontal part The purpose of this interface is data transfer between the meter and a portable computer or terminal and the meter parameterisation The meter has its own backup power supply that provides power to the internal clock should the main electrical network fail The backup supply consists of a standard 3 6 V Li Ion battery If a Battery low message appears on the display the battery must be replaced Only the manufacturer or its authorised representative may replace the battery The power and auxiliary terminal block is located on the bottom of the meter All connections having been completed and checked the terminal block shall be covered with sealed cover 2 2 General Requirements and Installation Procedure 1 230 Only personnel authorised by the Electric Utility can carry out the meter installation disconnection repair any subsequent parameterisation and sealing the rules of installation of electrical devises must be observed The manufacturer shall not be held liable for the meter malfunction should the user fail to adhere to the relevant requirements The meter is installed in dry premises containing no chemically aggressive gases or vapour The meter is fixed with three screws The meter overal
37. o independent electrical communication interfaces For local data readout optical interface DO is provided Several modifications of EPQS meter are manufactured They may differ in nominal current voltage connection type and the meter hardware or software The designation of different modifications of EPQS meter is explained in Table 1 1 CHAPTER 2 METER DESIGN 1 1 Marking of meter modifications Table 1 1 Explanation of meter modification code EPQS ii X XX XX Measuring elements 3 elements 4 wire connection Rated voltage V 3x57 7 100 3x63 5 110 3x69 2 120 3x100 3x110 3x120 3 220 380 3x230 400 3x380 3x400 3 120 208 3x127 220 3x220 3x230 sd Rated maximal current A CT connection 1 2 1 1 25 Software code Hardware code Hardware of class 0 2s 2X 1 2 Technical Specifications Accuracy class CT operated 0 25 or 0 5s IEC 62053 22 Rated voltage V see table 1 1 Rated maximum current A see table 1 1 Rated frequency Hz 50 or 60 Sensitivity threshold lnom CT operated 0 1 Power consumption VA in voltage circuits 2 0 76W in current circuits 0 4 CT operated Meter constant imp kWh 130000 Communication interfaces optical interface DO IEC 62056 21 electrical interface IEC 62056 31 electrical interface IEC 62056 31 pulse outputs number 6 independent output constant imp kWh imp kVArh 130000 pulse duration
38. r a second 7 2 3 Event logbook The event logbook is a meter memory area that stores the data on the last 8190 events or states Table A 5 of Annex A lists events and states that are recorded in the event logbook Each event is recorded together with its date and time stamp if a state is recorded its beginning and end date and time stamps are recorded as well This information can be displayed on the screen or transmitted through the communication interfaces CHAPTER 7 METER DATA PROTECTION 7 2 4 Counters and Timers The EPQS meter has a set of counters and timers for counting of events and registering of state durations After a certain event takes place the value of respective counter increases by one and after a state has been registered a respective timer starts counting its duration 7 2 5 Protection of Factory Constants During factory parameterisation various factory constants are entered in the meter memory Changes of those constants may affect measurement accuracy therefore software and mechanical measures for protection of factory constants are installed Factory constants may be changed only with the meter cover taken off and with special software Table 7 1 Access levels Parameter Access level Telemetry output constant Operator Customer name 15 symbols Operator Location 15 symbols Operator Configuration bits Operator
39. s Acertain energy 1 T8 or power M1 M8 tariff comes into force e Daily at certain time intervals up to 4 intervals daily Resolution is 1 minute e Average power of current integration period exceeds a set value after n seconds from the beginning of integration period In that case the relay may operate until o The end of integration period o The end of the next integration period e New event or state has been registered such as o Power failure at any phase o Phase sequence change o Meter damage or malfunction Table 2 5 Relay output parameters Maximum switching voltage V 350 Maximum switching current mA 50 U U max 2 5 4 External Backup Power Supply optional An external backup power supply allows reading meter data while there is no power in the network meter is connected to Main parameters of the backup power supply is presented in table 2 6 Table 2 6 External backup power supply parameters Voltage V 12 5 0 6 Power consumption mA lt 200 If all phases are disconnected and the backup power supply is used L sign is displayed on the phase sequence indicator Notes e Itis not mandatory to disconnect the backup power supply after the meter has been connected to the electrical network e The meter is supplied with backup power terminals upon a separate request only 2 6 Power Supply The components of the meter electronic circuitry are powered by a multi vo
40. t sequences see chapter 5 The position B of the push button is used for cumulation reset end of the billing period For detailed information see chapter 3 5 Function of position B depends on user request and can be one of the following e Cumulation Reset Pushing button in this position provides End of billing period For more information see chapter 3 5 e Lock of optical interface For more information see chapter 7 2 2 Implemented function of position B can be recognized by picture near to button Position B is used for interface lock Position is used for Cumulation Reset CHAPTER 3 DATA REGISTRATION 3 Data Registration This chapter describes the way measured and calculated data are stored in the meter memory The data and parameter structure of the EPQS meter fully complies with international DLMS standard COSEM Identification System and Interface Objects DLMS UA 100 1 2000 As provided by the Standard each value and parameter has its own OBIS OBject Identification System code that is displayed on the indicator and stored in the meter memory The meter has two memory units RAM memory and energetically independent FLASH memory for data storage In the case of power outage the data stored in RAM are lost while the data stored in FLASH remain The most of measured values are stored in RAM and are written in FLASH unit only after the end of integration period day or month or whe
41. terface 15 2 4 3 Auxiliary Communication Interface optional esses siesta 15 2 4 4 Interface FPriorilles dera en de eun oda ee de nene 15 2 5 THE METER INPUTS AND OUTPUTS 2 52 35 anaa e UE EXE 15 2 5 1 Optical LED Output Red Light Emission Diodes sse enne 15 2 5 2 Pulse Output contacts lid riire re ER be nah bb 16 2 5 3 Relay Outputs Optional idee ee ln eines 16 2 5 4 External Backup Power Supply optional 2222 00000000000000000000 16 2 0 POWER SUPPLY EE 17 2 7 PUSH BUTTON RM 17 VBATA REGISTEATIGOBN a Ne 17 OST ENERGY REGISTRATION rut no ics esL 19 2 2 DEMAND REGISTRATION 3 2 5555 CLAU EE eT reet 20 3 3 REGISTRATION OF INSTANTANEOUS VALUES 214 4 440 20 3 4 POWER QUALITY 8 2 4 44 44 en nennen 22 3 5 END OE BIDEINGIPERIOD Arte ee nee DIE ies c mU Sete E Salut tested taal Das 23 TARIFF MODULE wy c nk 24 DAY PROGRAM ERES 24 4 2 WEEK PROGRAM
42. urrently Q4_cumM1 M8 8 12 M displayed 0 current S_cumM1 M8 9 12 M month 1 last month S_cumM1 M8 10 12M etc Table A 3 Instantaneous Data Name OBIS code Comments Full Abbreviated Current in phase L1 Irms_L1 31 7 0 Current in phase L2 Irms L2 51 7 0 Current in phase L3 Irms L3 71 7 0 Voltage in phase L1 Urms L1 32 7 0 Voltage in phase L2 Urms L2 52 7 0 Voltage in phase L3 Urms L3 72 7 0 Line voltage of phases L1 L2 Urms_L12 12 7 1 Line voltage of phases L1 L3 Urms_L13 12 7 2 Line voltage of phases L2 L3 Urms_L23 12 7 3 Total active power in all phases Pins_LS 1 7 0 Active power in phase L1 Pins L1 21 7 0 Active power in phase L2 Pins L2 41 7 0 Active power in phase L3 Pins L3 61 7 0 Total apparent power in all phases Sins LS 9 7 0 Apparent power in phase L1 Sins L1 29 7 0 Apparent power in phase L2 Sins L2 49 7 0 Apparent power in phase L3 Sins L3 69 7 0 Total reactive power in all phases Qins LS 3 7 0 Reactive power in phase L1 Qins L1 23 7 0 Reactive power in phase L2 Qins L2 43 7 0 Reactive power in phase L3 Qins L3 63 7 0 Frequency Freq 14 7 0 Resultant cos p in all phases PFins LS 13 7 0 cos p power in phase L1 PFins L1 33 7 0 cos p power in phase L2 PFins L2 53 7 0 cos p power in phase L3 PFins L3 73 7 0 APPENDIX DATA AVAILABLE TO DISPLAY ON LCD Table A 4 Parameters Name
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