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1. 83 2 Output value 2 unit depends system configuration 85 Output value 3 unit depends system configuration 87 04 NA Output value 4 unit V or A depends on system configuration 89 PA System Phase angle between voltage and current System means atan Q P 91 PAI 11 Phase angle between voltage and current Rad 93 PA2 L2 Phase angle between voltage and current Rad 95 PA3 L3 Phase angle between voltage and current Rad 97 PAU1 Ll Phase angle voltage Rad 99 PAU2 L2 Phase angle voltage Rad 101 PAU3 L3 Phase angle voltage Rad 103 PATI LI Phase angle current Rad 105 PAI2 L2 Phase angle current Rad 107 PAI3 L3 Phase angle current Rad 109 12 11 12 Phase angle voltage Rad 111 PAU23 12 13 Phase angle voltage Rad 113 PAU31 13 11 Phase angle voltage Rad 115 THDUI L1 THD of U1 117 THDU2 L2 THD of U2 119 THDU3 L3 THD of U3 121 THDII L1 THD of I1 123 THDI2 L2 THD of I2 125 THDI3 L3 THD of I3 127 THDUI2 11142 THD of U12 129 THDU23 L2 L3 THD of U23 131 THDU3I L3 L1 THD of U31 133 DI System Demand of current DI DII DI2 DI3 135 DII LI Demand of current on L1 137 DI2 1 2 Demand of current 12 139 DI3 L3 Demand of current on 13 141 MDI System Maximum demand of current MDI MD1 MD2 MD3 143 MDII L1 Maximum demand of current on L1 145 MDI2 12 Maximum demand of current on 12 147 MDI3 L3 Maximum demand of current
2. 45 Appendix B Network System Connection Diagrams Appendix C Measured Quantity Definitions Appendix D Material Declaration 59 Appendix E Applicable standards and regulations 60 Appendix Approvals and certificates 61 Appendix G Technical specification 62 Introduction Introduction Thank you for choosing the Cewe digital programmable transducer from here on described as Cewe DPT The Cewe DPT is a complete 3 phase programmable multifunction transducer in a 104 mm DIN rail mounting case It provides very high accuracy in all measured quantities and can also provide measured instantaneous quantities on a bus system for instance voltage power frequency The Cewe DPT extensive configurable functional features together with the high accuracy enable application areas more numerous than for traditional transducers Besides having well designed traditional features such as current and voltage outputs it also communicates via two communication ports and can measure power quality quantities About this user manual This user manual describes the Cewe DPT s functions and provides the information needed
3. Input configuration Analogue outputs Digital outputs Communication and security General A Reading 7 Remote control Transformer ratios For the transducer to measure accurately the ratios for current and voltage transformers must be correct To configure the transformer ratio in ConfigView choose the node Transducer Configuration Input configuration in the structure tree Fill in the primary and secondary values for current and voltage Lowest possible voltage and current is respective 0 01A The ratio between primary and secondary can lowest be 0 1 Ratios Primary Secondary Voltage Line to Line 11 kV 100 0 Current 800 A h 000 Measurement method Wiring 4 wire system 3 element x Asymmetric Y x A1 A2 7 4 01 02 RS485 202 052405 spade 4 36016162 DPT 21518111111314 we L B0988 Maximum demand MD Integration time 60 minute s Note The values you choose as primary and secondary values will be considered as the nominal values e Measurement method It is possible to set the correct measurement method with two drop down toolbars A picture will also display the proper way to install the transducer All possible measurement variants are shown in Measuring principles pg 8 e Analogue output curves To configure the analogue output curves in ConfigView choose the node Transducer Con
4. ea Li em lt a 2 Active Power P x x x x x x x P1 x x x P2 x y P3 x y Reactive Power Q x x x x x x x Ql x x x Q2 x y Q3 x y Apparent Power S x x x x 51 x x S2 x y S3 x y Power Factor PF x x x x x x x PF1 x x x PF2 x y PF3 x y Reactive Power Factor QF x x x x x x x QF x x x QF2 x y QF3 x 32 Functions oseug 8uts x gt lt gt lt gt lt gt lt x x x x x LI T 0 x x x x gt gt x x x x x x pue uiojs g pooue eg GEZA lt x x x gt gt gt x gt x x x x x peo 1 pue WajsAS pooue eg c GEZIN gt x x x gt gt x gt gt x x x x peo pue uiojs g pooue eg c 11 gt lt x x x gt gt x x x x x x x x peo poouepeg onm c OLoulAssy 5 x x x gt x x x x x x x x gt ITIN poouryeq p y x gt gt x x x gt gt x x gt gt x x gt gt x x x x x x x x x gt 559 IIM x x x x x x x x x x x x x x x x x x x x x x x x x fen a x lo Ir lt H 2 Jo Jo JO JO m 8 gt amp kami a 5b
5. 5 rn 2 3 2 d Pi gt o en o 9 S a pan 50 lt o a bn a x 3 10 o gt ES ES So S 8 50 o 5 50 8 a gt gt lt 20 O O lt gt lt 33 Functions 21801 x x x x x 2 2 LI 1 0 x gt gt gt gt x gt gt gt x x x gt gt x x gt gt x pue WajsAS pooue eg c GEZA x gt gt gt x gt x gt gt gt x gt x x gt gt x gt gt pue WajsAS pooue eg c GEZIN x gt gt x gt gt x gt gt x gt gt x x gt x x gt gt x p o T pue WajsAS pooue eg c a x gt gt x gt x x gt gt x x x x x gt x x gt gt ZN ZIN peog poouryeg c ILNIW SSY MIM x gt x x x x gt x x x x x x gt x x gt x x 11 10 peouepeq om gt gt x gt gt x gt gt x gt gt x x gt gt x x gt gt x x OH oUl SSE OMM lt x x x x x x x x gt x x x x x x x x x x a fen 2 6 m N D p 5 4 S D 23 lm e
6. pue uiojs amp g pooue eg II cQ pue uiojs amp g pooue eg c GEZIN pue 5 pooue eg 1 peouepeg OLIOUIASSY AIM 1I 1N poouereq SIM OLIJOUTASSE X X X MDS1 MDS2 MDS3 Measured Quantity 36 Functions Modbus Map Introduction Background and Scope The Cewe DPT uses the Modbus protocol for configuration and data communication The Modbus protocol supports reading and writing of a number of registers The meaning of the registers is application dependent This section specifies the meaning of the Modbus registers the Modbus mapping for the Cewe DPT as far as reading is concerned If the writing registers also are interesting please contact Cewe Instrument The document also defines general requirements and limitations on the communication properties of the transducer The transducer Modbus Map specified in this document is version 1 References 1 Modbus Application Protocol Specification V1 1b 2 Modbus over serial line specification and implementation guide V1 02 General concepts Modbus over serial line The Cewe DPT implements Modbus over serial line using the RTU transport protocol according to 1 and 2 Slave addressing The Cewe DPT has Modbus slave address 1 as default Register Addressing The transducer uses two of the possible f
7. EE IE IB a 5 5 gt 5 b 5 2 5 amp 8 o S S 3 lt E S z k D 3 el 2 el 77 o s e E S gt Es gt 34 Functions Measured Quantity 3 a en s s s N 5 4 d g E S S S 2 g 5 2 2 2 S Dn 2 23 sS a Tlel 5 S e5 g 2 2 9 2 5 A 4 5 S 8 4 2 IFIS 2 8 8 2 di D e SE E sti st alla Demand of Active Power DP2 X y cont d DP3 x Max Demand of Active MDPImp x x x x x x Power Import MDPlImp x x x MDP2Imp x y MDP3Imp X y Max Demand of Active MDPExp x x x x x x x Power Export MDPIExp x x x MDP2Exp x y MDP3Exp x y Demand of Reactive Power DQ x x x x x x x x x DQ2 x y DQ3 x y Max Demand of Reactive MDQImp x x x x x x x Power Import MDQIImp x x x MDQ2Imp x y MDQ3Imp x y Max Demand of Reactive MDQExp x x x x x x Power Export MDQIExp x x x MDQ2Exp x y MDQ3Exp x y Demand of Apparent DS x X x x x x x Power 051 x x x DS2 x y DS3 x y Max Demand of Apparent MDS x X x x x x x Power 35 Functions 25844 IBUS GEIEN
8. Configuration summary to create a summary of the configuration that is in the file Together with a Print option there is also options for export to either Excel or pdf file Note Choosing Open configuration when Config View is connected to a transducer opens a warning dialog box with the message that the configuration in the transducer will be written over if you continue Note A configuration that is done offline must be saved before connecting to the transducer Otherwise it will be overwritten by the configuration in the transducer 16 Configuration reading and maintenance Reading Transducer 5 Transducer COM8 csn 21 Q Reading GJ Instant values O Output values CJ Remote control If you are connected to a Cewe DPT two alternatives will be available in the structure tree under the node Reading The displayed values are constantly updated Read values can be printed out as a snapshot of the time when the print command was issued It is also possible to save as a snapshot or do a continuously saving of data every second A pop up dialog will ask where the data should be saved in the system Information about the transducer kS CeweMC CeweConfigPT 0 0 1 3 Disconnect transducer 275 Ed Tronsducer Transducer 8 csn 21 Configuration General GERE Remote control Serial number Application Firmware branch OTP version Port Modbus version Output confi
9. Straight serial cable RS485 converter Daisy chained transducers Note Auxiliary supply needs to be connected to the Cewe DPT to be able to communicate with the transducer A first ever computer USB connect to the transducer This chapter is only necessary to do once for every computer regardless of how many transducers are connected to the same computer To be able to communicate via the USB port it is necessary to install the drivers for the USB port as a virtual COM port 1 Ensure that the transducer has auxiliary power 2 Connect the USB mini B type cable between the transducer and the computer 3 An installation shall start automatically and show a similar window as below Found New Hardware Wizard Welcome to the Found New Hardware Wizard Windows wil search for current and updated software by looking on your computer on the hardware installation CD or on the Windows Update Web site with your permission Read privacy pobor Can Windows connect to Windows Update to search for software O Yes this time only Yes now and every time I connect a device O No net this time Click Next to continue 4 Select the automatic choice and the driver will be downloaded from the transducer If not the software driver can be found on the installation media together with the installation package for Config View When everything is ready click OK to finish the installation 6 The virtual COM port that i
10. ew 20 Functions Quantity By phase Total Unit Active power Yes Yes W Reactive power Yes Yes var Apparent power Yes Yes VA Active power factor P S Yes Yes Reactive power factor Q S Yes Yes LF factor SgnQ 1 PF Yes Yes Frequency Not applicable Yes Hz Current Yes Yes A Phase voltage Yes Yes V Phase to phase voltage Yes Yes V Current with sign Yes Yes A Phase angle Yes Yes rad Phase angle voltage phase to Yes Not applicable rad neutral Phase angle voltage ph ph Yes Not applicable rad Phase angle current Yes Not applicable rad THD current Yes Not applicable 90 THD voltage Yes Not applicable 90 Average current Yes Yes MD current Yes Yes Average active power Yes Yes w MD active power import Yes Yes w MD active power export Yes Yes w Average reactive power Yes Yes var MD reactive power import Yes Yes var MD reactive power export Yes Yes Var Average apparent power Yes Yes VA MD apparent power Yes Yes VA Breakpoints There must always be two end points to define the max and min values of the output Up to seven additional breakpoints can be defined between the end points Each end point and breakpoint is a pair of numbers mapping the measured unit for Instance Watt for active power to the output unit for Instance A for a current output Note that the hardware configuration of the output is shown in brackets in t
11. 13 25 PF System Average power factor on all hases 11 12 13 P S 27 PF1 L1 Power factor on phase L1 cos on phase 1 1 1 51 29 PF2 L2 Power factor on phase L2 cos on phase L2 P2 S2 31 PF3 L3 Power factor on phase L3 cos on phase 1 3 P3 S3 33 QF System Average power factor on all hases L1 L3 sing Q S 35 QFI L1 Power factor on phase 1 1 sing on phase L1 QI SI 37 QF2 12 Power factor on phase L2 sing on phase L2 Q2 S2 39 QF3 L3 Power factor on phase L3 sing on phase 13 Q3 S3 41 LF System LF sgnQ 1 PF 43 LF1 L1 LF1 sgnQl 1 JPF1 45 LF2 L2 LF2 sgnQ2 1 2 47 LF3 L3 sgnQ3 1 PF3 49 System Frequency 51 I System Average System current I 1 12 13 3 53 Il L1 Il current 55 D L2 I2 current 57 I3 L3 I3 current 59 IS I with sign of active power IS ISI 152 IS3 3 signP 61 IS1 L1 151 sgnP1 H 63 IS2 L2 152 sgnP2 D 65 IS3 L3 153 sgnP3 I3 67 U System Average System Voltage Phase IN U Ul U2 U3 3 69 Ul LI U1 voltage Phase N 71 2 L2 U2 voltage Phase N 73 U3 L3 U3 voltage Phase N 75 U12 11 12 012 voltage Phase Phase 77 U23 12 13 023 voltage Phase Phase 79 U31 L3 L1 1 voltage Phase Phase 81 Ol NA Output value 1 unit V or A depends on system configuration 41 Functions 42
12. and communication ports are isolated from each other and to any other internal or external potential WARNING Live parts inside transducer cover Always disconnect all wires carrying dangerous voltages if opening the transducer Note that all warranties will be obsolete if the transducer has been opened WARNING This is a class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures Measurement generally Accuracy Class 0 2 Class 0 5 Frequency 50 60 Hz 45 65 Hz Measurment True RMS Up to 31 harmonic Measurement category CATIII lt 300VAC versus earth lt 600VAC versus earth Voltage circuit Nominal measuring voltage Uy 3 wire system 3x100 693 V 4 wire system 3x57 7 100 3x400 693 V Range 0 Un 12090 Input impedance 400kQ per phase Consumption lt U7 400kQ 3 per ph W Max overload voltage 1 2 x UN continuously 1 5 x Uy during 10 s with max 10 attempts with 10 5 between 2xU during 1 s with max 10 attempts with 10 5 between 0 25 V screw terminals for lt 6 mm Starting voltage Connector Current circuit Nom measuring current In 1 5 Measuring range 0 200 of I lt P x0 01Q per phase 2xl continuously 20x I during 1 s with max 10 attempts with 100 s between 40 x I during 1 s with max 5 attempts with 300 s between Consumption Max overload curr
13. by a DSP Using voltage transformers makes the electronics in the meter galvanically isolated from the measurement voltage which provides good personal safety and protection for connected equipment such as analogue outputs and communication equipment Calculation flow All values are calculated in the Cewe DPT based on calibrated current and voltage values Current and voltage amplitudes and phase angles are fully compensated in regards to accuracy harmonics frequency and temperature at all times Based on these individually compensated current and voltage signals all quantities that the Cewe DPT can present are subsequently calculated This means that accuracy for instant values is excellent and that active and reactive power are correctly calculated including harmonic power 3 element transducer On the 3 element Cewe DPT the phase voltages and neutral wires are connected to the transducer The voltages measured are phase voltages Power is calculated from three phase voltages and three currents Harmonic measurement is made on phase voltages The phase to phase voltage is calculated from the phase voltages The different possible connection ways No 1 and 2 can be seen in Appendix B Network System Connection Diagrams pg 47 2 element transducer On the 2 element Cewe DPT the neutral conductor is not connected to the transducer The voltages measured are subsequently phase to phase voltages Power is calculated based on two pha
14. control of analogue outputs and Remote control of digital outputs Remote control pg 25 Password A correct password will allow changing of configuration in a password protected transducer Transducer Tools Change Password Communications and security pg 26 Communication speed Set the baud rate for the transducer s serial ports Transducer Configuration Communication and security Communications and security pg 26 Maximum demand Determine values that are to be stored as maximum average values Transducer Configuration Input configuration Average and Maximum Demand pg 27 Information texts Enter information text that can be implemented in configuration summary Transducer Configuration General Miscellaneous pg 28 Customer serial number A possibility to add a customer unique serial number Transducer Configuration General Miscellaneous pg 28 15 Configuration reading and maintenance Changing configuration Apply 2 open a configuration form click the folder Configuration in the structure tree and then click one of the nodes Input configuration Analogue outputs etc Configuration changes can be made in all configuration forms In the lower right corner there is an Apply button If a transducer is connected and you click Apply changes to the configuration will be immediately transf
15. during the same period Apparent energy import quadrant I and IV Apparent energy export quadrant II and III Power factor Active power factor PF P S With negative active power the active power factor is negative Reactive power factor QF Q S With negative reactive power the reactive power factor is negative 57 Active power factor alternative definition LF sgnQ 1 PF S PF QF LF Phase angle Phase angle values are between 180 and 180 rad and z rad Power phase angle Phase angle power phase angle for element 15 calculated from the fundamental phase angles arctan P Q jna Total phase angle is calculated from fundamental power Phase angle voltage and current The phase angles on voltages and currents use PAU1 phase angle for voltage 1 1 as reference 0 For unity power factor the angles for 1 PAU2 PAU3 and PAI2 are 0 120 and 120 An inductive load does not affect voltage phase angles but PAI2 PAI3 could be 20 140 100 With this example the power phase angle would be 0 20 20 THD Total harmonic distortion THD is a measure of the harmonic content in a signal JI 1 S THD 100 12 Where 1 are the current s harmonic components The ca
16. measurands Average current Average active power Average reactive power Average apparent power Maximum Demand MD Other name Slave pointer This function averages the measurand over the time interval When the interval is finished the analogue output will change to the new value if it is higher than the previous stored value This value always measures the import value for the measurands and can therefore never be a negative value Note that for active and reactive power export corresponds to the largest negative value while import corresponds to the largest positive value of the average Possible measurands MD current MD active power import MD active power export MD reactive power import MD reactive power export MD apparent power Resetting MD The values in the Cewe DPT can be set to zero with Zero MD values on the Tools menu Note Average values will be reset if the transducer is disconnected from the auxiliary power while the maximums will be retained 27 Functions Miscellaneous Description It is possible to type an own description with a maximum of 32 characters that will be seen in the configuration summary Customer serial number There are two serial numbers in the transducer that can be used The default serial number is set from factory and can not be changed It is possible to set an own serial number to recognise the transducer This s
17. on L3 Functions 149 DP System Demand of active power DP DP1 DP2 DP3 151 DPI LI Demand of active power L1 153 DP2 12 Demand of active power on L2 155 DP3 L3 Demand of active power on L3 157 MDPImp System Maximum demand of active ower 159 MDPIImp L1 Maximum demand of active ower on 1 1 161 MDP2Imp L2 Maximum demand of active ower on L2 163 MDP3Imp 13 Maximum demand of active ower L3 165 DQ System of reactive power DQ DQI DQ2 DQ3 167 LI Demand of reactive power on L1 169 DQ2 L2 Demand of reactive power on L2 171 DQ3 L3 Demand of reactive power on L3 173 MDQImp System Maximum demand of reactive ower import 175 MDQIImp L1 Maximum demand of reactive ower import on L1 177 MDQ 2Imp L2 Maximum demand of reactive ower import on L2 179 MDQ3Imp 13 Maximum demand of reactive ower import on L3 181 DS System Demand of apparent power DS DS1 DS2 DS3 183 051 L1 Demand of apparent power on L1 185 DS2 L2 Demand of apparent power on L2 187 DS3 L3 Demand of apparent power on L3 189 MDS System Maximum demand of apparent power MDS MDSI MDS2 MDS3 191 MDSI L1 Maximum demand of apparent ower on 1 1 193 MDS2 L2 Maximum demand of apparent ower on L2 195 MDS3 L3 Maximum demand of apparent ower L3 197 MDPExp System Maximum demand of active ower export 199 MDPIExp 11 Maxim
18. version conflicts scc oes ete ro rote eta Pec v tust ein rr rs Mean 18 Upload nesctirmwates ione D ote to dena ede die 18 sah 19 R setting MD se tene E E Ou qeu ees 19 F NCUIONS ode SS tu Ord nda AD MO ADIER oU meters tendi etate vete peat es os ttti A 20 Digital d pa acea 23 Instant Values ie pieta ip ovd s co br secco Eu u ua aa SK RA EK 24 LC OTE OE te us saya Cis rase iu 25 Communications and security seus ceo icto ec eti bete ane e ucc ote 26 Average and Maximum Demand eere iate ei paris edere nee eda BR 27 Miscellaneous Lao e v do A EE aa AREE A E A RARE ASA 28 Measured Quantities s gt s ssdssossssovss vasssssssonnssvdesss0sssss00ss ssssss 00nss desesidssssessss ssrsss sessiseresiss Modbus S 7 Introduction al ED DN um D RU PD NONIS 37 General Concepts isse ts aire ee mlt eure vip de do Ee aeg amuyu de 37 MOMMIES UE ALONSO 1S FSIS ad esa tese cane sese 39 D ta t gisters eade at Udo e 40 Appendix A Declaration of Conformity
19. Cewe Digital Programmable Transducer User Manual Ver 1 2 CEWE INSTRUMENT Contents IntroductiOn erae So eco nn TOGS ep e GRS na pae Eae SORG ep opa sa About thiscuser manual eco tease oo e 4 CONTACT ve pene tios dbvee ep ute ec cavea ade pecie oves bed uu 4 Product mere ORME CONS acta vass ein Uk roa aea ae 5 ME CHiN Cath aqu A eet t 7 Meas ring principles amp Block aa an 9 Configuration reading and maintenance LO Connecting to th transducer e endet asua 11 Basiceconfiguraftiglhu vs a ep Sa ustna NT E od GO SUA D esti va E XT 13 OVERVIEW OF TUBCUOTSU urus eade ptos beo tex due pd Dei mud co ba De ea be dea 15 Changinp confieurattOtic ue b ee otav e DOR VO De ai SANS dieere b ti Ou ub eee 16 Working with configurations l n 16 R ading maqa OE 17 Information about the transducer n sr eR 17 Versions and
20. DP1 Max value of DP1 since reset power on The other phases and system is defined identically This applies to reactive and apparent power as well A simplified variant of demand is to measure the current only To satisfy these needs there is a demand of current DII Demand of Il DI Demand of I system 56 Energy Energy is calculated by integrating power P Q and S over time Definition of quadrants The term phase angle is described under its own heading below Quadrant I phase angle 0 90 Quadrant II phase angle 90 180 Quadrant III phase angle 180 90 Quadrant IV phase angle 90 0 Active energy Active energy is calculated for import and export The direction is controlled by the sign for active power import export Active energy import quadrant I and IV Active energy export quadrant II and III Reactive energy Reactive energy is calculated for four quadrants The quadrant is controlled by the sign for active and reactive power e g active power gt 0 and reactive power gt 0 corresponding to quadrant I Reactive energy import quadrant I and II Reactive energy export quadrant III and IV Reactive energy inductive quadrant I and III Reactive energy capacitive quadrant II and IV Apparent energy Apparent energy is calculated for import and export The direction is controlled by the sign for active power apparent energy is registered for the direction that the active energy has
21. Not supported except MEI type 14 as Transport described above Configuration registers This section defines registers used to configure the transducer Configuration registers are implemented as Holding Registers Data types All holding registers are unsigned 16 bit big endian integers according to the Modbus specification Signed 16 bit integers are represented as big endian 2 complement Q values are represented as signed 16 bit integers ASCII fields are packed two characters per register 32 bit integers are stored as two registers most significant first Floats are stored in two registers as single precision according to IEEE 754 Registers When reading or writing multiple holding registers in one operation it never allowed to span an address that is undefined Trying to read an undefined address will cause an Illegal Data Address 02 exception response 39 Functions Holding registers The below registers are the one that can be used for remote communication with the Cewe DPT Note if any holding registers shall be used with a Cewe DPT that uses password please contact Cewe Instrument for more information Decimal Property Datatype and values 548 Customer serial number 10 addresses for customer serial number typically interpreted as null terminated string 2 characters per address Must be read and written completely and alone in a single Modbus message 771 Serial num
22. Phase N voltage L3 N U3N L1 L2 Phase phase voltage L1 L2 U12 L2 L3 Phase phase voltage L2 L3 U23 L3 L1 Phase phase voltage L3 L1 U31 THD L1 N voltage L1 N ITHDU1 THD L2 N voltage L2 N THDU2 THD L3 N voltage L3 N1 THDU3 THD 11 12 voltage 11 12 ITHDU12 THD 12 13 voltage L2 L3 THDU23 THD 13 11 voltage L3 L1 THDU31 THD L1 Current L1 THDI1 THD L2 Current L2 THDI2 THD L3 Current L3 THDIS3 Demand of system current DI1 DI2 DI3 System DI Demand of L1 current L1 DI1 Demand of L2 current L2 DI2 Demand of L3 current L3 DI3 Maximum demand of system current System MDI Maximum demand of L1 current L1 MDI1 Maximum demand of L2 current L2 MDI2 Maximum demand of L3 current L3 MDI3 Demand of system active power DP1 DP2 DP3 System DP Demand of L1 active power L1 DP1 Demand of L2 active power L2 DP2 Demand of L3 active power L3 DP3 Maximum demand of system active power import System MDPImp Maximum demand of L1 active power import L1 MDP1Imp Maximum demand of L2 active power import L2 MDP2Imp Maximum demand of L3 active power import L3 MDP3Imp Maximum demand of system active power export System MDPExp Maximum demand of L1 active power export L1 MDP1Exp Maximum demand of L2 active power export L2 MDP2Exp Maximum demand of L3 active power export L3 Demand of system reactive power DQ1 DQ2 DQ3 System DQ Demand of L1 reactive power L1 DQ1 Demand of L2 reactive power L2 DQ2 Demand of L3 reactive power L3 DQ3 Maximum demand of system reactive power
23. aintenance Configuration reading and maintenance ConfigView is a PC program that makes all Cewe DPT functions available With Config View you can do e Configuration Configuring means that parameters affecting transducer function can be set Examples of parameters that can be configured are transformer ratios curves for analogue outputs and baudrates e Reading The information that can be read is instant and output values e Remote control The Cewe DPT can be used to set both the analogue and digital outputs to a certain value without having any input signals e Maintenance Examples of maintenance tasks are resetting the Maximum Demand MD values and updating the firmware in the meter Menu Toolbar Structure tree Configuration form 10 Configuration reading and maintenance Connecting to the transducer To be able to configure or read values in the Cewe DPT ConfigView must be connected and have authorisation to access the transducer The transducer has a password that can be set See the section Communications and security pg 26 With the transducer s usual factory settings no password is configured and subsequently no password is necessary when connecting If the transducer has a password it is still possible to read the settings in the transducer To communicate with the transducer the PC must be physically connected to the Cewe DPT in one of the following ways e PC USB cable Transducer e PC
24. ber 2 words can be interpreted as 32 bit unsigned integer Read only 1297 Remote control O1 32 bit float in V or A dep on hardware 1299 Remote control O2 32 bit float in V or A dep on hardware 1301 Remote control O3 32 bit float in V or A dep on hardware 1303 Remote control O4 32 bit float in V or dep on hardware 1312 Remote control D1 Read 0 or I D1 1313 Remote control D2 Read 0 or I D2 Data registers The following data values are read only and implemented as Input Registers in the transducer Modbus map Calculated Values All calculated values are represented as two consecutive Modbus registers The value of a quantity is represented as a single precision floating point number according to IEEE 754 in SI unit Address dec Quantity Phase Explanation 1 P System Active power of the system P P1 P2 3 P1 11 Active power on phase 1 1 5 P2 12 Active power phase 12 7 P3 L3 Active power on phase L3 9 Q System RReactive power of the system Q Q1 02 Q3 11 Ql L1 Reactive power on phase L1 13 Q2 E2 Reactive power on phase L2 15 Q3 L3 Reactive power on phase L3 17 S System Apparent power of the system 40 Functions S S1 S2 S3 19 Sl Ll Apparent power on phase 1 1 21 52 L2 Apparent power on phase L2 23 53 13 Apparent power on phase
25. ctor on phase L3 sing on phase 13 Q3 S3 L3 QF3 LF sgnQ x 1 System LF LF sgnQ1 x 1 1 L1 LF1 LF sgnQ2 x 1 PF2 L2 LF2 LF sgnQ3 x 1 PF3 L3 Frequency System F Phase angle mean arctan Q P System PA 1 1 Phase angle between voltage and current Rad L1 PA1 L2 Phase angle between voltage and current Rad L2 PA2 L3 Phase angle between voltage and current Rad L3 Phase angle phase N voltage Rad Reference usually 0 L1 PAU1 Phase angle phase N voltage Rad L2 PAU2 Phase angle phase N voltage Rad L3 PAU3 Phase angle current Rad L1 PAI1 Phase angle current Rad L2 PAI2 Phase angle current Rad L3 PAI3 Phase angle phase phase voltage Rad L1 PAU12 Phase angle phase phase voltage Rad L2 PAU23 Phase angle phase phase voltage Rad L3 PAU31 Average system current Instantaneous System current 11 12 13 3 System L1 current 11 I1 L2 current L2 I2 L3 current L3 I3 and sign of active power output magnitude and polartity Active currents average line currents 15 151 152 153 3 System IS Active currents L1 151 Active currents L2 152 29 Functions Active currents L3 IS3 System voltage average L1 L3 Phase N Average System Voltage U U1 U2 U3 3 System U L1 Phase N voltage L1 N U1N L2 Phase N voltage L2 N U2N L3
26. e bus address as soon as there is more than one transducer on the RS485 bus Any number between 1 and 247 is accepted Password and security The transducer has a password that will limit the access to show everything but not allowing configuration or remote control The password can consist of up to 40 case insensitive alpha numerical characters To change the password first enter the old and then the new password twice The new password will be activated after a reconnect of the transducer The default for the transducer is to have no password 26 Functions Average and Maximum Demand These two functions are used to output a static average value on one or more analogue outputs during the time interval set as the integration time under Configuration Input Both functions are calculated and presented every minute regardless of the time interval set The average value is always presented on the analogue output If the new average value exceeds the previously stored value for maximum demand it becomes the new value for maximum demand The calculation interval can be chosen between 1 and 60 minutes in whole minutes Before the first interval has been finished the output will be set to 0 mA or 0 V Average Other name Bimetal This function averages the measurand over the time interval When the interval is finished the analogue output will change to the new value regardless if it is higher or lower than the previous Possible
27. e transducer s factory settings no password is configured and subsequently no password is necessary when you connect 6 MODBUS Id MODBUS Id is the identification of a transducer on a multi drop RS485 line This number is only required if a special transducer is to be addressed when several meters are connected together with RS485 7 Click the Connect button Problems with connecting If the meter cannot be connected an error message is displayed Depending on the reason the message can suggest corrective actions such as changing the port or port baud rate Basic configuration Some basic settings may be required before the Cewe DPT will be able to measure and operate correctly in a system Note Settings are only necessary if they have not been made at the factory prior to delivery To change the configuration for a transducer you must be connected to it Click the Configuration folder in the structure tree to the left in ConfigView to display the various functions that can be configured For more information see the section Changing configuration pg 16 Tip You can save a configuration from a transducer to a file A summary of the configuration can also be printed out You can also create a configuration without being connected to a transducer For more information see Working with configurations pg 16 13 Configuration reading and maintenance Transducer Transducer 8 csn 21 m Configuration
28. ength The shortest possible pulse length is 10 ms Pulses are not allowed to come too often and because of this there is a relationship between the pulse length and the specified pulse constant that maximises the pulse frequency to 1000 pulse length ms 2 lt gt lt gt Pulse Gap Maximum pulse frequency at outputs is limited so that the gap is at least as long as the pulse length The pulse outputs can be inverted Note that outputs are inverted via firmware If the meter loses its auxiliary power the relay will open regardless if it is inverted or not e Remote control With this function the output can be made to switch between open and closed without having any input signals to the transducer For more information see Remote control pg 25 Accuracy of the pulse output The accuracy of each of the digital outputs is 0 30 of full scale value for all connections except when the neutral N is not connected see system No 3 in Appendix B Network System Connection Diagrams pg 47 To achieve this accuracy the minimum measured period is 30 seconds The outputs comply with 0 5s accuracy 23 Functions Instant values Besides being a transducer the Cewe DPT can also measure and present instant values Instant values are constantly changing values such as current voltage power and harmonics Overview The table in Measured Quantities pg 29 provides an overview of the instant values that can be read wi
29. ent 4 mA 2 screw terminals for lt 6 mm Starting current Connector 62 Auxiliary supply Voltage range 40 276 VAC VDC AC frequency 45 65 Hz Max burden lt 12VA 7W Inrush current lt 35 0 3 ms Analogue outputs Number of outputs Type Max voltage at open output Max over driven output Load influence Range Load current outp Range Load voltage outp Residual ripple Auxiliary voltage influence Temperature coefficient Programmable response time too Digital outputs Number of outputs Accuracy Type Pulse length Ron 4 current voltage bi polar lt 20V lt 125 hardware limiter lt 0 1 20mA lt 7500 5 lt 2mA 7 5 10V 2kO 2 gt 400Q lt 0 4 peak to peak at full load 0 196 lt 0 01 extra per deg C 200 ms 300 ms 600 ms 900 ms 1 2s 1 5s 2s 5s 10s 30s 2 0 5s Solid state MosFET relay bi directional rating 0 2 A 110 VAC DC Varistor protected 10 ms 1s 8Q max Communication ports Serial RS485 port Connector Com protocol Baud rate Serial USB port Connector Com protocol Hand shaking Baud rate Three screw terminals for lt 6 mm Modbus RTU 1200 38400 baud USB Mini B connector Modbus RTU Not supported 38400 baud automatic Temperature range Normal temperature Operating temperature Storage temperature Temperature coefficient Relative humidity Altitude Envi
30. ent f rs krar undertecknad s som tillverkare eller tillverkarens representant inom EU att angiven materiel verensst mmer med s kerhetskraven angivna ovan On behalf of F r Cewe Instrument AB a 2010 02 16 Tech manager Teknisk chef E eS Date Position ignature Datum Befattning Underskrift Cewe Instrument AB 20 0045r3 46 Appendix B Network System Connection Diagrams 4 wire system 3 element asymmetric load Y direct connected direct connected voltages and external current transformers external voltage and current transformers 47 4 wire system 3 element balanced load 01 11 LL direct connected direct connected voltage and external current transformer pp external voltage and current transformers 48 3 wire system 2 element asymmetric load D a direct connected direct connected voltages and external current transformers EO sl IUE Two external voltage and current Three external voltage transformers and two transformers current transformers 49 3 wire system 2 element balanced load 12 23 1 direct connected direct connected voltages and external current transformer external voltages and current transformers 50 3 wire system 2 element balanced system and load 12 direct connected direct connected voltage and externa
31. erial number can be of maximum 20 characters If such a serial number is added that is what will be shown in the tree structure in Config View and in configuration summary It is possible to step back to the factory serial number by removing the customer serial number It is always the factory serial number that is presented in the Information about the transducer menu 28 Measured Quantities Functions Instant value Phase Quantity Active power of the system P P1 P2 P3 System P Active power on phase L1 L1 P1 Active power on phase L2 L2 P2 Active power on phase L3 L3 P3 Reactive power of the system Q Q1 Q2 Q3 System Q Reactive power on phase L1 LI Q1 Reactive power on phase L2 L2 Q2 Reactive power on phase L3 L3 Q3 Apparent power of the system S S1 S2 S3 System S Apparent power on phase L1 L1 S1 Apparent power on phase L2 L2 52 Apparent power on phase 13 L3 53 Average power factor on all phases L1 12 13 P S System PF Power factor on phase L1 on phase 1 1 P1 SI LI 1 Power factor on phase L2 cos on phase 12 2 52 L2 PF2 Power factor on phase L3 cos on phase L3 P3 S3 L3 PF3 Average power factor all phases L1 L2 L3 sing Q S System QF Power factor on phase L1 sing on phase 11 Q1 S1 L1 QF 1 Power factor on phase L2 sing on phase L2 02 52 L2 QF2 Power fa
32. erred to the transducer Working with configurations In Config View you can work with configurations as a collection of the Cewe DPT s settings and save them in a file On Config View 5 File menu the commands Save configuration and Open configuration On the View menu there is a command for creating a configuration summary Below is a list of how you can use Config View 5 functions to work with configurations e Creating a configuration file without being connected to a transducer Any changes to the configuration can be applied and then saved as a configuration Make all settings that are to be included in the configuration file and save the file The file s configuration can later be transferred to a transducer e Saving a transducer s configuration to a file Choose Save configuration when ConfigView is connected to a transducer to save the transducer s configuration to a file The configuration file can later be used as a backup or be transferred to another transducer e Transferring a configuration file to a meter Choose Open configuration when ConfigView is connected to a transducer to transfer a configuration file e Printing out a summary of a transducer s configuration Choose View Configuration summary when Config View is connected to a transducer to create a summary of the transducer s entire configuration Now choose Print e Printing out a summary of a configuration file Open a configuration file and choose View
33. figuration Analogue outputs in the structure tree Find out how Analogue outputs works and how it can be configured in the section Analogue outputs pg 20 14 Configuration reading and maintenance e Pulse constants for pulse outputs To configure pulse constants for digital pulse outputs in ConfigView choose the node Transducer Configuration Digital outputs in the structure tree Find out how Digital outputs works and how it can be configured in the section Digital outputs pg 23 Overview of functions The following is a brief overview of the functions available in Cewe DPT All functions in the transducer can be both configured and read in Config View In many cases Config View can also export data to a file or print out data Function Configuration location in ConfigView Section in handbook describing the function Analogue outputs Set the functions for the up to four analogue outputs Transducer Configuration Analogue outputs Analogue outputs pg 20 Digital outputs Set the functions for the up to two digital outputs Transducer Configuration Digital outputs Digital outputs pg 23 Instant values Presentation of instant values like voltage and current Transducer Reading Instant values Instant values pg 24 Remote control Control the analogue and digital outputs regardless of the input Transducer Remote control Remote
34. firmware Language ConfigView can be set to different languages The available languages can be seen under Language on the View menu Resetting MD values The Maximum Demand values in the Cewe DPT can be set to zero with Zero MD values on the Tools menu Both average demand and MD values will be set to zero when the auxiliary is lost 19 Functions Functions Analogue outputs The Cewe DPT has up to four analogue outputs that can be configured to either remote control or to output a current or voltage signal that reflects to any of the measured quantities They have an isolated interface between the electronics and the surroundings to ensure personal safety For electrical data on the transducer s outputs see Appendix G Technical specification pg 62 Outputs The outputs can be configured as follows e Inactive The output is not used The output will be set to 0 mA or OV depending on the configuration e Remote control With this function the output can be made active without having any input signals to the transducer For more information see Remote control pg 25 e Measurand quantity This defines which of the quantities measured by the transducer will be reflected on the output Most of the quantities also need to be selected for a phase or the complete system The unit for the selected measurand is shown to the right of the two drop down lists Analogue outputs Output Measurand Active power gt
35. fon telefax CEWE INSTRUMENT AB BOX 1006 SE 611 29 NYKOPING SWEDEN TELEPHONE 46 155 775 00 FAX 46 155 77597 Cewe Instrument AB 20 0045r3 45 __ 29 LVD Reference to harmonized standard s or other specification to which conformity is declared LVD H nvisning till harmoniserad e standard er eller annan norm med vilken verens st mmelse deklareras EN 61010 1 2001 EMC Reference to harmonized standard s to which conformity is declared or if harmonized standard has not been fully applied reference to report from competent body EMC H nvisning till harmoniserad e standard er med vilken verensst mmelse deklareras eller om harmoniserad e standard er inte helt till mpats h nvisning till intyg fr n beh rigt organ EN 61000 6 2 2005 EN 61000 6 4 2007 Additional information vriga uppgifter The equipment conforms with the harmonised standards or technical specifications described above and comply with good engineering practice in safety matters in force within the EU Materielen verensst mmer med de harmoniserade standarder eller tekniska specifikationer som anges ovan och uppfyller god s kerhetsteknisk praxis inom EU By signing this document the undersigned declares as manufacturer or the manufacturer s authorized representative established within the EU that the equipment in question complies with the safety requirements stated above Genom att underteckna detta dokum
36. guration hardware Output Al Output A2 Output A3 Output A4 CEWE Information about the connected transducer can be obtained by choosing View Information about the transducer This information is vital when contacting support if you encounter problems with the transducer 17 Configuration reading and maintenance Versions and version conflicts The latest version of Config View can be used with all firmware application versions of Cewe DPT The version number for Config View is displayed on the application s title bar or under About ConfigViewPT on the Help menu The version number for the transducer s firmware can be viewed under Information about the transducer on the View menu Cewe DPT and ConfigView have three digit version numbers according to the format main version sub version build number As long as the main version and sub version are the same Config View and the transducer are compatible If the transducer firmware is of a newer version than Config View and the main version and or sub version are different Config View will display a message that connection is not possible ConfigView must be updated Upload new firmware Cewe DPT is designed to be able to receive updated firmware via the serial ports Newly developed and improved functions can thus be added in a transducer that lacked these functions when delivered Note 1 Be sure to upgrade Config View to the latest version before upgrading the transd
37. his area for example 20mA 20mA There is a 10 over range on the defined hardware configuration It is always possible to change or delete all added breakpoints Accuracy The accuracy of each of the analogue outputs at full value is in worst case an additional 0 05 over the bus value see Bus accuracy pg 24 At lower values the error will increase It is recommended not to use an analogue output in a low range that is covered by another hardware variant of the Cewe DPT For instance a 20mA 20mA hardware should not be used as a 5mA 5mA output as there is a separate hardware for this range 21 Functions Response time Response time can be used to filter the changes in output It defaults to 300ms and is programmable between 200 ms to 60 seconds 22 Functions Digital outputs The Cewe DPT has two digital outputs that can be configured to perform various tasks They are protected against overvoltages by varistors They also have an isolated interface between the electronics and the surroundings to ensure personal safety For electrical data on the transducer s outputs see Appendix G Technical specification pg 62 Outputs The outputs can be configured as follows e Not used The output is not used It is set to open condition e Pulse output The output is used to pulse a energy type that the transducer is measuring A pulse constant is specified for the output as primary pulses unit as well as the pulse l
38. import System MDQImp Maximum demand of L1 reactive power import L1 MDQ1Imp Maximum demand of L2 reactive power import L2 MDQ2Imp Maximum demand of L3 reactive power import L3 MDQ3Imp Maximum demand of system reactive power export System MDQExp Maximum demand of L1 reactive power export L1 MDQ1Exp 30 Functions Maximum demand of L2 reactive power export L2 MDQ2Exp Maximum demand of L3 reactive power export L3 MDQSExp Demand of system apparent power DS1 DS2 DS3 System DS Demand of L1 apparent power L1 DS1 Demand of L2 apparent power L2 DS2 Demand of L3 apparent power L3 DS3 Maximum demand of system apparent power System MDS Maximum demand of L1 apparent power L1 MDS1 Maximum demand of L2 apparent power L2 MDS2 Maximum demand of L3 apparent power L3 MDS3 31 Functions Quantities measured for each system x the quantity can be sent all communication channels and be presented on analogue output y the quantity can only be presented via MODBUS and USB Measured Quantity 1 s s s N 5 3 4 3 cl S S S 5 m S 2 2 2 5 8 2 13 2 2 n o 92 Slo 292 83 13 13 3 E 2 amp es gt amp S 3 S 8 m 22 G S a SAN s 8 lt a ol o I I 8 51 5 oo Ho B 2 3 a 55
39. l Design Number IN OU ation T Ch 1 Al 21 Ul 2 H 1 3 22 U2 5 12 4 6 Ch2 A2 23 _ U3 8 I3 7 9 24 N 11 Ch 3 A3 25 _ 26 U auxl 13 Ch4 4 27 28 Current voltage and auxiliary power connections for Cewe DPT Digital outputs RS 485 communication Ch I D1 4041 60 Ch2 D2 42 43 GND 61 62 Product Description Connector for Cewe DPT The screw terminals in the Cewe DPT are equipped with wire guards and can be used with cables up to 6 mm Auxiliary power The Cewe DPT is supplied with separate auxiliary power input Auxiliary power can be supplied both with alternating current AC and polarity independent direct current DC within a specified range and frequency The power supply covers the whole range in the same variant Digital outputs The Cewe DPT digital outputs are solid state MOS FET bipolar semiconductor relays with normally open contact function Internal current limit protects the relay from being damaged by excessively high current They are galvanically isolated from all other terminals Analogue outputs The Cewe DPT analogue outputs can either be hardware configured as bi polar directional current or voltage outputs They are open or short circuit protected and galvanic isolated from all other terminals Communication ports RS485 and USB The Cewe DPT is equipped with two serial communication ports USB and RS485 It is possible to use both
40. l current transformer external voltage and current transformers 51 3 wire system 2 element balanced system and load 23 direct connected direct connected voltage and external current transformer external voltage and current transformers 52 3 wire system 2 element balanced system and load U31 I1 direct connected direct connected voltage and external current transformer external voltage and current transformers 53 Single phase system r direct connected direct connected voltage and external current transformer external voltage and current transformers 54 Appendix C Measured Quantity Definitions Current and voltage RMS values for current and voltage are calculated as the root of the sum of squares for the harmonic components up to the 31th harmonic L The current s first harmonic component fundamental specified as peak value 1 The current s second harmonic component specified as peak value has doubled frequency compared to the first harmonic Irus Ja H RMS Current in L1 always positive IS1 RMS Current in L1 with sign of power P1 I System Current always positive IS System Current with sign of power ps H 12 13 23 For voltage all definitions and formulas above are used Power Harmonic component power The calculati
41. lculation is made in the same ways for current and voltage THD values are 0 100 58 Appendix D Material Declaration Enclosure Polycarbonate Macrolon Flammability class V 0 to UL94 self extinguishing non dripping free of halogen Connection terminals Terminals Steel Cage clamps Brass Screws Brass 59 Appendix E Applicable standards and regulations industrial environments IEC EN 60688 IEC EN 61010 1 IEC EN 60529 IEC EN 60068 1 IEC EN 60068 2 1 IEC EN 60068 2 2 IEC EN 60068 2 3 IEC EN 60068 2 6 IEC EN 60068 2 27 IEC EN 62053 31 IEC EN 61326 1 IEC EN 61000 6 2 6 4 a a a a a a a b b c IEC EN 61000 4 2 IEC EN 61000 4 3 IEC EN 61000 4 4 IEC EN 61000 4 5 IEC EN 61000 4 6 IEC EN 61000 4 8 IEC EN 61000 4 11 CISPR 16 CISPR 22 CISPR 11 50160 DIN 40 110 DIN 43 807 UL 94 60 Electrical measuring transducers for converting AC electrical quantities to analogue or digital signals Safety requirements for electrical equipment for measurement control and laboratory use Part1 General requirements Degrees of protection provided by enclosures IP code Basic environmental testing procedures for electronic Test A Cold Test B Dry heat Test Ca Damp heat steady state Test Fe Vibration sinusoidales Test Ea Shock Pulse output devices for electromech electronic meters 2 wire 9 Electrical equipment for measurement contr
42. m of the input configuration Full Scale Up to 50 of 3 and 10 of 5 harmonics 2 FS FSVoltage x FSCurrent Up to 50 of 3 and 10 of 5 harmonics 24 Functions Remote control Remote control of analogue outputs If one or more analogue output s has been configured as remote control the output can be set to any value within the range of the output For example a 20 mA to 20 mA output can be set to any value with four decimals within that range Remote control of digital outputs If one or more digital output s has been configured as remote control the output can be set to be open or closed 25 Functions Communications and security All Cewe DPT are equipped with an USB and RS485 port for communication It supports USB 2 0 and MODBUS protocol For more information on protocol support see Modbus Map pg 37 Communication speed The transducer s USB port always runs at 38400 baud and is fully auto configured from the system The RS485 needs to be set to the correct baudrate to have a successful connection The baudrate can be set between 1200 bps and 38400 bps The factory settings for the RS485 channel are 9600 bps even parity and one stop bit It is possible to set the transducers response delay in ms When connecting to the transducer it is also possible to set the RTS request to send delay in ms MODBUS address A bus address can be defined for the RS485 port and it is necessary to use a uniqu
43. ol and laboratory use EMC requirements Electromagnetic compatibility EMC Generic standards for industrial environments a Part 6 2 Immunity Table 1 4 P Part 6 4 Emission Table 1 Electrostatic discharge immunity test Radiated RF electromagnetic field immunity test Electrical fast transient burst immunity test Surge immunity test Immunity to conducted disturbances induced by RF fields Power frequency magnetic field immunity test Voltage dips interruptions variations immunity tests Spec for radio disturbance immunity limit methods apparatus Spec for radio disturbance immunity limit methods info technology Spec for radio disturbance immunity limit methods industrial scientific and medical equipment Power quality standard Quantities used in alternating current theory two line circuit Markings for switchboard meters measuring transducers Plastic flammability standard for parts in transducer devices Appendix Approvals and certificates YADAV MEASUREMENTS PVT LTD YMPL 147495 26987A YMPL 147496 26988A YMPL 159049 27420 YMPL 159049 27421 YMPL 159049 27422 YMPL 159049 27423 YMPL 162259 27457 YMPL 173109 27783 61 Appendix G Technical specification Safety The current inputs are galvanically isolated from each other and to any other internal or external potential The voltage input group is galvanically isolated to any other internal or external potential The analog and digital outputs
44. ons below are for active power the calculations for reactive are identical except for that cos functions are replaced with sin functions Pl Active power in L1 Pl Active power in L1 is calculated for harmonic component n PAl Power phase angle between harmonic component U1 and 3 element method Pl U1 cos PAI 31 Fie gt Pi n l 2 element method For 2 element method only the total power is calculated in each harmonic component T Total active power is calculated for harmonic component n ql Phase angle between harmonic component U12 and 71 92 Phase angle between harmonic component U32 and 13 P U12 I1 1 032 13 cos 92 3l Pc n l 55 Active and reactive power Active and reactive power is calculated as the sum of harmonic component power up to 31st harmonic The calculation is made with plus and minus signs where negative power represents export direction and positive represents import direction P Total active power P1 Active power in L1 Q Total reactive power 1 Reactive power in L1 1 2 P3 01 02 Q3 For 2 element meters two elements added instead of three Apparent power 5 Total apparent power S1 Apparent power in L1 5 51 52 53 SISUl I Demand of power T Integration period in hours P1 Active power in L1 DP1 Demand of P1 MDP1 Maximum demand of P1 T DP1 f P t dt Average of P1 with sign 0 MDP1 DP1 M
45. our Modbus data blocks Input Registers and Holding Registers The data blocks have separate address spaces For instance address 0003 means output type for output line 1 in the Holding Register block but active power 1 1 in the Input Register block Addresses in this document are given as data element address which is Modbus PDU address 1 To get Modbus PDU address subtract I from addresses given in this document Serial port configuration For the RS485 port the following attributes can be configured Parity none even or odd default even Stop bits 1 or 2 1 is default Baud rate 1200 2400 4800 9600 19200 9600 is default Databits is always 8 37 Functions According to 2 total number of bits must always be 11 including the start bit The transducer does however also support no parity and only one stopbit giving a total of 10 bits since this is common among Modbus equipment The USB port does not need any port specific configuration Security The default configuration of the transducer allows configuration on the RS485 port To block configuration changes on that port set the configuration property Allow configuration on the RS485 port 0x0213 to 0x0000 This can also be done in ConfigView software Down time during configuration While the configuration settings are changing after a commit the transducer may leave its ordinary mode of operation for up to two seconds During this period outputs
46. ports simultaneously e The USB point to point connection is used for both configuration and reading of the Cewe DPT through a standard USB Mini B connector Modbus RTU is used as protocol e The RS485 multi drop connection is used for both configuration and reading of the Cewe DPT through three screw terminals used for shielded twisted pair wires Modbus RTU is used as protocol It is possible to block the configuration option over RS485 and only allow reading Product Description Mechanical design The Cewe DPT can be mounted on any DIN rail top hat rail system in any direction according to DIN EN 50022 Dimensions WxHxD 104 x 71 x 114 mm Enclosure and protective earth The enclosure consists of a transducer base and a cover The transducer is not connected to protective earth Isolation and personal safety The current inputs are galvanically isolated from each other and to any other internal or external potential The voltage input group is galvanically isolated to any other internal or external potential The analogue and digital outputs and COM ports are isolated from each other and to any other internal or external potential Product Description Measuring principles The measuring circuit in Cewe DPT consists of current and voltage transformers that provide signals to six parallel AD converters analogue to digital converters that are synchronised by a common clock signal The digital signals are thereafter processed
47. ronment 0 15 30 45 10 55 40 85 0 5 basic 10 lt 80 2000 Indoor only Reference conditions Usage group according to IEC EN60688 Reference temperature range Pre conditioning Input variable For further information refer to EN60688 table 3 and 4 Safety Protection class Pollution degree Installation category Protection housing terminals Common mode voltage group II 15 C 30 C 30 min Rated useful range II Double insulation EN 61010 1 Table D 12 2 refer to measuring and auxiliary inputs lt 300VAC versus earth CATII refer to measuring inputs lt 600VAC versus earth IP40 test wire IEC EN 60529 IP20 test finger IEC EN 60529 600VRMS 300VRMS Insulation surge test Insulation AC voltage test 3 7kKVAC 50Hz 1min 2 2kVAC 50Hz 1min 0 5kVAC 50Hz 1min 5 1 2 50us 0 5Ws valid for circuits with reference voltage 240V e Outer surface versus earth All voltage input versus earth All current input versus earth Auxiliary input versus earth acc to EN61010 1 Outer surface versus earth All voltage and current inputs connected together versus earth Auxiliary input versus earth All voltage inputs versus earth All current inputs versus earth All digital outputs versus earth All analog outpu
48. s assigned will be auto detected by ConfigView To identify the virtual COM port manually it can be found by opening the Control Panel System Hardware Device Manager and expand the Com port node 11 Configuration reading and maintenance z C Device Manager De Action teo fm I Bl ewes M Batteries M Computer lt Disk drives Mj Display adapters d DVDJCD ROM drives amp Floppy dsk controllers I Floppy disk drives Human Interface Devices IDE ATAJATAPI controllers t Keyboards E T Mee and other pointing devices Network adapters J Ports COM amp LPT Communications Port COMI Communications Port COM 21 USB to UART Bridge Controller COM3 Printer Port LPT1 Processors amp scst and RAID controllers SCSI Controller 7 Continue to Usual connection to the transducer Usual connection to the transducer To prepare Config View for configuration of a transducer a connection must be established between Config View and the transducer To open a connection execute the following steps CeweMC CeweConfiePT 0 0 0 11 Connect to transducer L Connect to transducer File Tools Zli Connect tran i General Settings Communication channel Configuration pA d USB Virtual RS232 Port i COM8 Reading C Serial port 85485 Remote control Set
49. se to phase voltages U12 and U31 and two currents 11 and I3 according to the 2 watt meter method The 2 element meter is primarily used for D connected systems 3 wire Harmonic measurement is made on phase to phase voltages The different possible connection ways No 3 to 7 can be seen in Appendix B Network System Connection Diagrams pg 47 1 element transducer On the 1 element Cewe DPT the single phase voltage and neutral wires are connected to the transducer The voltage measured is phase voltages Power is calculated from the single phase voltage and current Harmonic measurement is made on phase voltage The phase to phase voltage is calculated from the phase voltage The different possible connection ways No 8 can be seen in Appendix B Network System Connection Diagrams pg 47 A transducer that is bought with a certain element configuration can be changed to any other element configuration by the user Block diagram ULU2U3 ILD D Voltage Current transformer transformer 6 Analog digital converters Digital signal processor Measuring module Module interconnection UAUX SMPS 30 276 V AC DC Primary Power Module Product Description Analogue USB port SSR Outputs outputs Solid State Analouge voltage Relay outputs and current outputs USB Output Communica module tion module 46 x isolated voltage SecondaryPower Module RS485 serial port RS485 port Configuration reading and m
50. th the transducer Readings can be viewed with Config View or with other software that has implemented Cewe DPT s communication protocol Update frequency The update frequency for instant values is proportional to the frequency of the measured quantity At 50 Hz updating occurs 12 5 times per second and at 60 Hz 15 times per second Response time for instant values on the bus For the two serial ports it is possible to get a response time of 200 ms for all instant values as long as the communication is set to 9600 baud or higher Bus accuracy The table shows the accuracy for a Cewe DPT with accuracy class 0 2 for a selection of instant values The basic accuracy is valid under reference conditions acc to IEC EN 60688 Instant value Accuracy Instant value Accuracy Voltage 0 2 FS Frequency 0 01 Hz Current 0 2 FS Voltage unbalance 0 2 Power 0 2 FS THD Voltage and 0 5 current Power factor 0 1 Additional error due to system application configuration Neutral N not connected see system No 3 in Appendix Network System Connection Diagrams pg 47 Instant value Additional error Voltage 0 1 Power 0 1 Power factor 0 1 Phase angle 0 1 THD THD stands for Total Harmonics Distortion and is a measurement of the amount of harmonics present in a signal Voltage and current THD can be read via ConfigView up to the 31 harmonic FS Maximu
51. tings Transducer Transducer COM3 m Configuration Reading 2 Remote control rouge USB RS232 Baudrate Parity Stop bits onnect through irtual zu Port COMS Baudrate 38400 RTS off delay ms Response delay ms How to connect to the transducer 1 Select the transducer to connect Select a transducer connection by clicking in the left hand tree panel If there is no transducer added start by right click on the top level and add a transducer 2 Connect to the transducer Choose Connect transducer from the File menu or by clicking the toolbar button 12 Configuration reading and maintenance 3 Communication channel Click the Settings tab and choose either USB Virtual RS232 or Serial Port RS485 If the serial port is used the baud rate and parity must be selected For transducer s with factory settings the baud rate is 9600 Note The selectable communication ports are taken from Windows and show every port that is assigned to this type of transducer 4 Response delay It is possible to set the response delay of ConfigView This can be changed if there is a problem with the connection and it is suspected that the PC system isn t fast enough It is also possible to set the RTS delay from the PC so that the last bit s of the message isn t cut 5 Password Click the Common tab If required a password is entered if one is configured in the transducer With th
52. to configure and use the transducer The manual covers all versions of the dCewe DPT Some of the described functional properties can be missing in certain transducer versions The Cewe DPT is complemented with ConfigView a PC program for configuring manual reading and maintenance The ConfigView 15 a part of the Instrument Management Console program Contacting us For more information and technical support please contact Cewe Instrument Internet www ceweinstrument se E mail technical support support ceweinstrument se E mail order and product information marknad ceweinstrument se Telephone 46 0 155 77500 Address Cewe Instrument AB Box 1006 SE 611 29 Nyk ping Product Description Connections Product Description Connections to the Cewe DPT are made on the meter terminal on the front of the transducer The connections are measuring voltages measuring currents analogue outputs relay outputs separate auxiliary power and connections to communication modules Connections for Cewe DPT 14 2 25 26 1 U1 0 10kV 0 20mA 5 7500 20 20mA 5 7500 i 11 3 P 40 100 100MVar DPT221 401 Q 27 28140 41 ik 60 61 62 ns or 2 nses Adr 1 _ 61 GND Usage Group II 10kV 400V Type Snr 1 1000A 1A 50 60Hz Mnr M Analogue outputs Connections Channe
53. ts versus earth e RS 485 COM port versus earth USB COM port versus earth All circuits terminals not under test are connected to earth Ambient tests IEC EN60068 2 1 2 3 Temp Humidty Cold dry IEC EN60068 2 6 IEC EN60068 2 27 IEC EN61000 6 2 6 4 Weight Weight heat damp Vibration Acceleration 2 g Frqv range 10 150 10Hz rate of frequency sweep 1 octave minute Number of cycles 10 in each of the three axes Shock Acceleration 3 x 50 g 3 shocks each in 6 directions Electromagnetic compability EMC Generic standards for industrial environments immunity and emission 500 g 63 Cewe Instrument AB Box 1006 SE 611 29 Nyk ping SWEDEN W E Tel 46 155 775 00 Fax 46 155 775 97 e mail info ceweinstrument se www ceweinstrument com INSTRUMENT 0226 3
54. ucer There is otherwise the risk that Config View will no longer be version compliant after firmware upload Note 2 The USB serial port shall be used when uploading new firmware unless it is absolutely necessary to use RS485 If RS485 is used when uploading Modbus is not used t CeweMC CeweConfigPT 0 0 1 3 Disconnect transducer Upload firmware Update firmware Change password Syro MD vals Fie T Projekt Transducer Programmable Releases Fimmare Appiication version 0 2 7 svn Settings CeweMC 8824 ProgrammableT ransducer mh Settings in CeweConfigPT enera control Show details about the upload C E W E 18 Configuration reading and maintenance On the Tools menu there is an Upload firmware command when the transducer is connected with the correct password or when no password is set Begin by choosing the file that contains the update The file name and version number will then be displayed and sometimes a message Check the box Show details about the upload to view more information about the upload Click Update to begin updating During the time the update is being installed the transducer stops measuring Depending on the size of the file to be transferred and the baud rate the time for updating will vary If possible connect at the highest baud rate 38400 bps to speed updating After updating the transducer is restarted automatically to complete installation of the transducer s new
55. um demand of active ower export on 1 1 43 Functions 44 201 MDP2Exp L2 Maximum demand of active ower export on L2 203 MDP3Exp L3 Maximum demand of active ower export on L3 205 MDQExp System Maximum demand of reactive ower export 207 MDQIExp Ll Maximum demand of reactive ower export on L1 209 MDQ2Exp L2 Maximum demand of reactive ower export on L2 211 MDQ3Exp L3 Maximum demand of reactive ower export on L3 Appendix A Declaration of Conformity Ramee eines 10 Handl ggare Issued by Datum Date Dokument ID Utgava Revision LN 2010 02 16 20 0045 Manufacturers Declaration of Conformity TILLVERKARDEKLARATION tillverkarens f rs kran om verensst mmelse according to the EU EMC directive 2004 108 EC and the EU Low Voltage Directive LVD 2006 95 EC enligt EUs EMC direktiv 2004 108 EG samt EUs l gsp nningsdirektiv LVD 2006 95 EG Brand name or trade mark Fabrikatnamn eller varum rke CEWE INSTRUMENT AB Type of equipment Typ av apparat utrustning DIGITAL PROGRAMMABLE TRANSDUCER DIGITAL PROGRAMMERBAR M TV RDESOMVANDLARE Type designation etc Typbeteckning DPT all versions Manufacturer or Manufacturer s authorized representative established within the EU Tillverkare eller Tillverkarens representant inom EU CEWE INSTRUMENT AB Name address telephone no telefax no Namn adress tele
56. will remain as they were prior to the configuration change Modbus function codes Supported function codes The transducer supports the following Modbus function codes Function Description Comment code 3 Read Holding Registers 4 Read Input Registers 6 Write Single Register 8 Diagnostics Only allowed on RS485 if configured so 11 Get Comm Event Counter 12 Get Comm Event Log 16 Write Multiple Registers 23 Read Write Multiple Registers 43 Encapsulated Interface Only supports MEI type 14 conformity 01 Transport device Will return 16 bytes with vendor name 16 Identification bytes product code and 8 bytes firmware version These will be strings padded with spaces as follows Vendor Cewe Instrument Product Code DPT Version X y Z 38 Functions Unsupported function codes The codes listed below are defined in 1 but not supported by the transducer and will result in ILLEGAL FUNCTION 0x01 exception code The same is true for any function code not explicitly listed in the supported function codes above Function Description Comment code 1 Read Coils 2 Read Discrete Inputs 5 Write Single Coil 7 Read Exception Status 15 Write Multiple Coils 17 Report Slave ID Read appropriate holding registers instead 20 Read File Record 21 Write File Record 22 Mask Write Register 24 Read FIFO Queue 43 Encapsulated Interface

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