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MTR-3 

 

 

 

 

 

Installation Instructions

 

 

 

DEIF A/S

  

Page 2 of 51 

Table of contents 
 

1.

 

ABOUT THIS DOCUMENT ................................................................................................... 3

 

G

ENERAL PURPOSE

 ...................................................................................................................... 3

 

C

ONTENTS

/

OVERALL STRUCTURE

 .................................................................................................. 3

 

2.

 

WARNINGS AND LEGAL INFORMATION ........................................................................... 4

 

L

EGAL INFORMATION AND RESPONSIBILITY

 ..................................................................................... 4

 

E

LECTROSTATIC DISCHARGE AWARENESS

 ..................................................................................... 4

 

S

AFETY ISSUES

 ............................................................................................................................ 4

 

D

EFINITIONS

 ................................................................................................................................ 4

 

S

AFETY WARNINGS AND INSTRUCTIONS FOR USE

 ........................................................................... 5

 

W

ASTE

 ........................................................................................................................................ 5

 

3.

 

BASIC DESCRIPTION AND OPERATION OF THE MTR-3 ................................................. 6

 

I

NTRODUCTION

 ............................................................................................................................. 6

 

U

SER INFORMATION

 ..................................................................................................................... 7

 

D

ESCRIPTION OF THE PRODUCT

 .................................................................................................... 7

 

P

URPOSE AND USE OF MEASURING TRANSDUCER

 ........................................................................... 8

 

4.

 

CONNECTION ..................................................................................................................... 10

 

I

NTRODUCTION

 ........................................................................................................................... 10

 

M

OUNTING

 ................................................................................................................................. 10

 

C

ONNECTION OF INPUT

/

OUTPUT MODULES

 ................................................................................... 12

 

C

OMMUNICATION CONNECTION

 ................................................................................................... 12

 

C

ONNECTION OF AUXILIARY POWER SUPPLY

 ................................................................................ 14

 

5.

 

SETTINGS ........................................................................................................................... 15

 

I

NTRODUCTION

 ........................................................................................................................... 15

 

M-S

ET SOFTWARE

...................................................................................................................... 15

 

S

ETTING PROCEDURE

 ................................................................................................................. 16

 

G

ENERAL SETTINGS

 ................................................................................................................... 16

 

C

ONNECTION

 ............................................................................................................................. 18

 

C

OMMUNICATION

 ....................................................................................................................... 18

 

S

ECURITY

 .................................................................................................................................. 19

 

E

NERGY

 .................................................................................................................................... 19

 

A

NALOGUE OUTPUTS

 .................................................................................................................. 20

 

A

LARMS

 ..................................................................................................................................... 23

 

R

ESET OPERATIONS

 ................................................................................................................... 23

 

6.

 

MEASUREMENTS ............................................................................................................... 24

 

I

NTRODUCTION

 ........................................................................................................................... 24

 

S

UPPORTED MEASUREMENTS

 ..................................................................................................... 24

 

A

VAILABLE CONNECTIONS

 ........................................................................................................... 24

 

E

XPLANATION OF BASIC CONCEPTS

 ............................................................................................. 26

 

C

ALCULATION AND DISPLAY OF MEASUREMENTS

 .......................................................................... 26

 

P

RESENT VALUES

 ....................................................................................................................... 27

 

7.

 

APPENDIX A: MODBUS PROTOCOL ............................................................................... 29

 

M

ODBUS COMMUNICATION PROTOCOL

 ......................................................................................... 29

 

8.

 

APPENDIX B: CALCULATIONS AND EQUATIONS ......................................................... 49

 

C

ALCULATIONS

 .......................................................................................................................... 49

 

 

 

Содержание MTR-3

Страница 1: ...QUICK START GUIDE INSTALLATION INSTRUCTIONS Document no 4189300022C SW version 3 0X X or later Multi transducer MTR 3 ...

Страница 2: ...MEASURING TRANSDUCER 8 4 CONNECTION 10 INTRODUCTION 10 MOUNTING 10 CONNECTION OF INPUT OUTPUT MODULES 12 COMMUNICATION CONNECTION 12 CONNECTION OF AUXILIARY POWER SUPPLY 14 5 SETTINGS 15 INTRODUCTION 15 M SET SOFTWARE 15 SETTING PROCEDURE 16 GENERAL SETTINGS 16 CONNECTION 18 COMMUNICATION 18 SECURITY 19 ENERGY 19 ANALOGUE OUTPUTS 20 ALARMS 23 RESET OPERATIONS 23 6 MEASUREMENTS 24 INTRODUCTION 24 S...

Страница 3: ...th the first steps of installing and using the unit It contains instructions for installations and use of the MTR 3 Contents overall structure This document is divided into chapters and in order to make the structure simple and easy to use each chapter will begin from the top of a new page Please make sure that you read this document before starting to work with the MTR 3 Failure to do this could ...

Страница 4: ...ce the unit is installed and connected these precautions are no longer necessary Safety issues Installing the unit implies work with dangerous currents and voltages Therefore the installation of the unit should only be carried out by authorised personnel who understand the risks involved in the working with live electrical equipment Definitions Throughout this document a number of notes with helpf...

Страница 5: ... size is 6 A Proper connection of I O modules Waste It is forbidden to deposit electrical and electronic equipment as municipal waste The manufacturer or provider shall take waste electrical and electronic equipment free of charge The complete procedure after lifetime should comply with the Directive EZ 2002 96 EG about restriction on the use of certain hazardous substances in electrical and elect...

Страница 6: ... EC as first priority the prevention of waste electrical and electronic equipment WEEE and in addition the reuse recycling and other forms of recovery of such wastes so as to reduce the disposal of waste It also seeks to improve the environmental performance of all operators involved in the life cycle of electrical and electronic equipment Compliance of the product with European CE directives Subc...

Страница 7: ...of a measurement from a certain limit after exceeding it Description of the product The measuring transducer is intended for measuring analysing and monitoring single phase or three phase electrical power network It measures RMS value by means of fast sampling of voltage and current signals which makes the instrument suitable for acquisition of transient events A built in micro controller calculat...

Страница 8: ...00 VL N 1000 VL L Current inputs Each current input is connected to a measuring circuit through a current transformer 0 01 Ω per phase Maximum allowed thermal value of input current is 15 A cont Purpose and use of measuring transducer The instrument is used for monitoring and measuring electric quantities of three phase electrical power distribution system The meter is provided with 32 programme a...

Страница 9: ...and φ THD of phase voltage Uf1 Uf2 and Uf3 THD of power angle I1 I2 and I3 Phase to phase Phase to phase voltage U12 U23 U31 Average phase to phase voltage Uff Phase to phase angle φ12 φ23 φ31 THD of phase to phase voltage Energy Counter 1 Counter 2 Counter 3 Counter 4 Active tariff Other measurements MD values Phase current I1 I2 I3 Active power P Positive Active power P Negative Reactive power Q...

Страница 10: ...d for DIN rail mounting It should be mounted on a 35 mm DIN rail by means of three plastic fasteners Before installation fasteners should be in open position pulled When the device is in place lock push the fasteners to closed position Electric connection Voltage inputs of the measuring transducer can be connected directly to a low voltage network or via an appropriate voltage measuring transforme...

Страница 11: ...1W Single phase connection Connection 3b 1W3 Three phase three wire connection with balanced load Connection 3u 2W3u Three phase three wire connection with unbalanced load Direct connection 3u 2W3u Three phase three wire direct connection Connection 4b 1W4 Three phase four wire connection with balanced load ...

Страница 12: ...munication connection The MTR 3 is equipped with one standard serial RS485 communication port and one service communication port USB Connect the communication line by means of the corresponding terminals Connection information is stated on the instrument label Connector terminals are marked on the label on the upper side of the instrument The USB connector is positioned on the bottom side of the i...

Страница 13: ...w terminal connector see the table below USB USB communication serves as a fast peer to terminal data link The instrument is detected by host as a USB 2 0 compatible device The USB connection is provided through a USB standard type mini B connector When the MTR 3 is connected to a PC through USB communication for the first time a user is prompted to install a driver The driver is provided when dow...

Страница 14: ...ble recommended type mini B plug Connection of auxiliary power supply The MTR 3 multi transducer has universal AC DC auxiliary power supply Information on electric consumption is given in the data sheet Auxiliary supply is connected through a screw terminal connector Connection of universal power supply to terminals 1 and 2 For safety purposes it is important that both wires Line and Neutral are f...

Страница 15: ...l devices and their addresses in the network can be easily set Instrument settings Multi register edit technology assures a simple modification of settings that are organised in a tree structure Besides transferring settings into the instrument storing and reading from the setting files are also available Real time measurements All supported measurements can be captured in real time in a table for...

Страница 16: ...Display and Security Description and location Two parameters that are intended for easier recognition of a certain unit They are especially used for identification of the device or location on which measurements are performed Average interval The averaging interval defines the refresh rate of measurements on communication and remote display Temperature unit Choose a unit for temperature display Ma...

Страница 17: ... setting the instrument uses current inputs for synchronisation If also all phase currents are smaller than Starting current for PF and PA setting synchronisation is not possible and frequency displayed is 0 Reactive power and energy calculation Two different principles of reactive power and energy calculation are used Standard method With this method a reactive power and energy is calculated base...

Страница 18: ...Hz This setting is used for alarms Energy flow direction This setting allows manual change of energy flow direction IMPORT to EXPORT or vice versa in the readings tab It has no influence on readings sent by communication CT connection If this setting is set to REVERSED it has the same influence as if CTs would be reversely connected All power readings will also change their sign Communication Seri...

Страница 19: ...c activation could be set Password modification A password can be modified however only that password can be modified to which the access is unlocked at the moment Password disabling A password is disabled by setting the AAAA password Energy Active tariff When active tariff is set one of the tariffs up to four is defined as active Common energy exponent Common energy exponent defines minimal energ...

Страница 20: ...layed 1 0 1 x 10 0 1 W 23 331 kW 10 0 10 x 10 0 10 W 23 33 kW 100 0 100 x 10 0 100 W 0 0233 MW 1000 0 1000 x 10 0 1 kW 0 023 MW 1 1 1 x 10 1 10 W 23 33 kW 1 2 1 x 10 2 100 W 0 0233 MW 1 3 1 x 10 3 1 kW 0 023 MW 1 4 1 x 10 4 10 kW 0 02 MW 10 2 10 x 10 2 1 kW 0 023 MW Analogue outputs Number of analogue outputs depends on the version of MTR 3 Analogue outputs Each of up to four analogue outputs is f...

Страница 21: ...b b b b Example of settings with linear and bent characteristic Average interval for analogue output Defines the average interval for measurements on the analogue output Available settings are from 1 period 0 02 sec by 50 Hz up to 128 periods 2 56 sec by 50 Hz Fast analogue output Functionality of the fast analogue output module is the same as with the standard analogue output module The only diff...

Страница 22: ...0 MW 10 p 1MWh 150 1500 MW 1 p 1MWh Alarm notification functionality An alarm notification function can also be assigned to output In case of any alarm occurrence alarm output will trigger passive electromechanical relay or passive solid state relay Two parameters should be defined for each alarm output The source for assigned alarm alarm group 1 2 or both Type of output signal when alarm is detec...

Страница 23: ...is can be defined Quantity value a current value or a MD thermal function are defined for every individual alarm Reset operations Reset energy counters E1 E2 E3 E4 All or individual energy meters are reset Reset MD values Current and stored MDs are reset Reset the last MD period Current MD value is reset Reset alarm output All alarms are reset New values of alarms are calculated in percentage at t...

Страница 24: ...phase four wire connection with balanced load Connection 3u 2W3 three phase three wire connection with unbalanced load Connection 4u 3W4 three phase four wire connection with unbalanced load Survey of supported measurements regarding connection mode Basic measurements Designat Unit 1b 3b 3u 4b 4u Phase Voltage U1 U1 V Voltage U2 U2 V Voltage U3 U3 V Average voltage U U V Current I1 I1 A Current I2...

Страница 25: ...oltage U23 U23 V Phase to phase voltage U31 U31 V Average phase to phase voltage Uff U V Phase to phase angle φ12 φ12 Phase to phase angle φ23 φ23 Phase to phase angle φ31 φ31 THD of phase to phase voltage U12 U12 THD THD of phase to phase voltage U23 U23 THD THD of phase to phase voltage U31 U31 THD Energy Counters 1 4 E1 E2 E3 E4 Wh VAh VArh Active tariff Atar Max values MD MD current I1 I1 A MD...

Страница 26: ... rate of displayed measurements based on a sampling factor Power and energy flow The figure below shows a flow of active power reactive power and energy for 4u connection Calculation and display of measurements This chapter deals with capture calculation and display of all supported quantities of measurement Only the most important equations are described however all of them are shown in chapter 8...

Страница 27: ...I N 1 n RMS All current measurements are available via communication Active reactive and apparent power Active power is calculated from instantaneous phase voltages and currents Two different principles of reactive power calculation are used Standard method With this method a reactive power is calculated based on the assumption that all power which is not active is reactive Q2 S2 P2 This also mean...

Страница 28: ...c and the first current harmonic for each individual phase The total power angle is calculated from the total active and reactive power see equations for total power angle in chapter 8 Appendix B Calculations and equations on page 36 A positive sign shows inductive load and a negative sign shows capacitive load Frequency Network frequency is calculated from time periods of measured voltage Frequen...

Страница 29: ...the Modbus protocol enables point to point for example device to PC multi drop communication via RS485 communication Modbus protocol is a widely supported open interconnect originally designed by Modicon The memory reference for input and holding registers is 300001 and 400001 respectively The register tables no the next pages shows both the PLC address and Modbus address to read from the desired ...

Страница 30: ...Power Total Pt 300141 300142 140 141 04 T6 Active Power Phase L1 P1 300143 300144 142 143 04 T6 Active Power Phase L2 P2 300145 300146 144 145 04 T6 Active Power Phase L3 P3 300147 300148 146 147 04 T6 Reactive Power Total Qt 300149 300150 148 149 04 T6 Reactive Power Phase L1 Q1 300151 300152 150 151 04 T6 Reactive Power Phase L2 Q2 300153 300154 152 153 04 T6 Reactive Power Phase L3 Q3 300155 30...

Страница 31: ...angle between U3 and I3 300176 300176 175 175 04 T17 Internal Temperature 300182 300182 181 181 04 T17 THD HARMONIC DATA U1 THD 300183 300183 182 182 04 T16 U2 THD 300184 300184 183 183 04 T16 U3 THD 300185 300185 184 184 04 T16 U12 THD 300186 300186 185 185 04 T16 U23 THD 300187 300187 186 186 04 T16 U31 THD 300188 300188 187 187 04 T16 I1 THD 300189 300189 188 188 04 T16 I2 THD 300190 300190 189...

Страница 32: ...ower Total Pt positive 300511 300512 510 511 04 T6 Active Power Total Pt negative 300513 300514 512 513 04 T6 Reactive Power Total Qt L 300515 300516 514 515 04 T6 Reactive Power Total Qt C 300517 300518 516 517 04 T6 MAX DEMAND SINCE LAST RESET I1 300519 300520 518 519 04 T5 I2 300525 300526 524 525 04 T5 I3 300531 300532 530 531 04 T5 Apparent Power Total St 300537 300538 536 537 04 T5 Active Po...

Страница 33: ...500 2501 04 T_float U2 30250 3 302504 2502 2503 04 T_float U3 30250 5 302506 2504 2505 04 T_float Uavg phase to neutral 30250 7 302508 2506 2507 04 T_float U12 30250 9 302510 2508 2509 04 T_float U23 30251 1 302512 2510 2511 04 T_float U31 30251 3 302514 2512 2513 04 T_float Uavg phase to phase 30251 5 302516 2514 2515 04 T_float I1 30251 7 302518 2516 2517 04 T_float I2 30251 9 302520 2518 2519 0...

Страница 34: ...Phase 3 PF3 30255 9 302560 2558 2559 04 T_float Power Factor Total PFt 30256 1 302562 2560 2561 04 T_float CAP IND P F Phase 1 PF1 30256 3 302564 2562 2563 04 T_float CAP IND P F Phase 2 PF2 30256 5 302566 2564 2565 04 T_float CAP IND P F Phase 3 PF3 30256 7 302568 2566 2567 04 T_float CAP IND P F Total PFt 30256 9 302570 2568 2569 04 T_float φ1 angle between U1 and I1 30257 1 302572 2570 2571 04 ...

Страница 35: ...gative 30260 9 302610 2608 2609 04 T_float Reactive Power Total Qt L 30261 1 302612 2610 2611 04 T_float Reactive Power Total Qt C 30261 3 302614 2612 2613 04 T_float Apparent Power Total St 30261 5 302616 2614 2615 04 T_float I1 30261 7 302618 2616 2617 04 T_float I2 30261 9 302620 2618 2619 04 T_float I3 30262 1 302622 2620 2621 04 T_float DYNAMIC DEMAND VALUES Active Power Total Pt positive 302...

Страница 36: ...In I neutral measured 300815 300815 814 814 04 T16 In Iavg 300816 300816 815 815 04 T16 In Active Power Phase L1 P1 300817 300817 816 816 04 T17 Pn Active Power Phase L2 P2 300818 300818 817 817 04 T17 Pn Active Power Phase L3 P3 300819 300819 818 818 04 T17 Pn Active Power Total Pt 300820 300820 819 819 04 T17 Pt Reactive Power Phase L1 Q1 300821 300821 820 820 04 T17 Pn Reactive Power Phase L2 Q...

Страница 37: ...en U1 and U2 300841 300841 840 840 04 T17 100 ϕ23 angle between U2 and U3 300842 300842 841 841 04 T17 100 ϕ31 angle between U3 and U1 300843 300843 842 842 04 T17 100 Frequency 300844 300843 843 843 04 T17 Fn 10 Hz I1 THD 300845 300845 844 844 04 T16 100 I2 THD 300846 300846 845 845 04 T16 100 I3 THD 300847 300847 846 846 04 T16 100 U1 THD 300848 300848 847 847 04 T16 100 U2 THD 300849 300849 848...

Страница 38: ...t I1 300859 300859 858 858 04 T16 In I2 300860 300860 859 859 04 T16 In I3 300861 300861 860 860 04 T16 In DYNAMIC DEMAND VALUES Active Power Total Pt positive 300862 300862 861 861 04 T16 Pt Active Power Total Pt negative 300863 300863 862 862 04 T16 Pt Reactive Power Total Qt L 300864 300864 863 863 04 T16 Pt Reactive Power Total Qt C 300865 300865 864 864 04 T16 Pt Apparent Power Total St 30086...

Страница 39: ...4 300924 923 923 04 T17 Pt Apparent Power Phase L1 S1 300925 300925 924 924 04 T16 Pn Apparent Power Phase L2 S2 300926 300926 925 925 04 T16 Pn Apparent Power Phase L3 S3 300927 300927 926 926 04 T16 Pn Apparent Power Total St 300928 300928 927 927 04 T16 Pt Power Factor Phase 1 PF1 300929 300929 928 928 04 T17 1 Power Factor Phase 2 PF2 300930 300930 929 929 04 T17 1 Power Factor Phase 3 PF3 300...

Страница 40: ...Total Pt 300091 300092 90 91 04 T6 Active Power Phase L1 P1 300093 300094 92 93 04 T6 Active Power Phase L2 P2 300095 300096 94 95 04 T6 Active Power Phase L3 P3 300097 300098 96 97 04 T6 Reactive Power Total Qt 300099 300100 98 99 04 T6 Reactive Power Phase L1 Q1 300101 300102 100 101 04 T6 Reactive Power Phase L2 Q2 300103 300104 102 103 04 T6 Reactive Power Phase L3 Q3 300105 300106 104 105 04 ...

Страница 41: ...ALUES Time Into Period minutes 300175 300175 174 174 04 T1 I1 300176 300177 175 176 04 T5 I2 300178 300179 177 178 04 T5 I3 300180 300181 179 180 04 T5 Apparent Power Total St 300182 300183 181 182 04 T5 Active Power Total Pt positive 300184 300185 183 184 04 T6 Active Power Total Pt negative 300186 300187 185 186 04 T6 Reactive Power Total Qt L 300188 300189 187 188 04 T6 Reactive Power Total Qt ...

Страница 42: ...P2 300818 300818 817 817 04 T17 Pn Active Power Phase L3 P3 300819 300819 818 818 04 T17 Pn Active Power Total Pt 300820 300820 819 819 04 T17 Pt Reactive Power Phase L1 Q1 300821 300821 820 820 04 T17 Pn Reactive Power Phase L2 Q2 300822 300822 821 821 04 T17 Pn Reactive Power Phase L3 Q3 300823 300823 822 822 04 T17 Pn Reactive Power Total Qt 300824 300824 823 823 04 T17 Pt Apparent Power Phase ...

Страница 43: ...it 11 Reset MD values Reset command register 2 400014 13 T1 Bit 0 Reset alarm output relay 1 Bit 1 Reset alarm output relay 2 Bit 2 Reset alarm output relay 3 Bit 3 Reset alarm output relay 4 Reserved 400015 400099 14 98 GENERAL SETTINGS Modbus register tables for measurements 400101 100 T1 0 Version 1 MTR 3 1 Version 2 compatible with MTR 2 Description 400102 400120 101 119 T Str40 Location 40012...

Страница 44: ... 4 periods 0 08 s 50 Hz 3 8 periods 0 16 s 50 Hz 4 16 periods 0 32 s 50 Hz 5 32 periods 0 64 s 50 Hz 6 64 periods 1 28 s 50 Hz default 7 128 periods 2 56 s 50 Hz 8 256 periods 5 12 s 50 Hz Reserved 400172 400201 171 200 COMMUNICATION Res for Port 1 Device Address DNP3 400201 200 Port 1 Device Address Modbus 400203 202 T1 Port 1 Baud Rate 400204 203 T1 0 Baud rate 1200 1 Baud rate 2400 2 Baud rate ...

Страница 45: ...2 not used 19 Pulse input 4 reg 40402 not used Energy Counter 1 Configuration 400422 421 T1 Bit 0 Quadrant I Enabled Bit 1 Quadrant II Enabled Bit 2 Quadrant III Enabled Bit 3 Quadrant IIII Enabled Bit 4 Absolute Value Bit 5 Invert Value Energy Counter 1 Divider 400423 422 T1 0 1 1 10 2 100 3 1000 4 10000 Energy Counter 1 Tarif Selector 400424 423 T1 Bit 0 Tarif 1 Enabled Bit 1 Tarif 2 Enabled Bit...

Страница 46: ...400812 811 T17 of output type Output 1 X Breakpoint 3 X3 400813 812 T17 of parameter value Output 1 Y Breakpoint 3 Y3 400814 813 T17 of output type Output 1 X Breakpoint 4 X4 400815 814 T17 of parameter value Output 1 Y Breakpoint 4 Y4 400816 815 T17 of output type Output 1 X Breakpoint 5 X5 400817 816 T17 of parameter value Output 1 Y Breakpoint 5 Y5 400818 817 T17 of output type Output 1 X Break...

Страница 47: ... Output Bit 6 Alarm Condition if 0 Bit 7 Use Thermal function Alarm 1 compare value 401010 1009 T17 of parameter value ALARM 2 401011 401013 1010 1012 See ALARM 1 ALARM 3 401014 401016 1013 1015 See ALARM 1 ALARM 4 401017 401019 1016 1018 See ALARM 1 ALARM 5 401020 401022 1019 1021 See ALARM 1 ALARM 6 401023 401025 1022 1024 See ALARM 1 ALARM 7 401026 401028 1025 1027 See ALARM 1 ALARM 8 401029 40...

Страница 48: ...alue 16 bit 4 decimal places Example 0 9876 CAP 00FF 2694 16 T9 bits 31 24 bits 23 16 bits 15 08 bits 07 00 Time 32 bit 1 100s 00 99 BCD Seconds 00 59 BCD Minutes 00 59 BCD Hours 00 24 BCD Example 15 42 03 75 7503 4215 16 T10 bits 31 24 bits 23 16 bits 15 00 Date 32 bit Day of month 01 31 BCD Month of year 01 12 BCD Year unsigned integer 1998 4095 Example 10 SEP 2000 1009 07D0 16 T16 Unsigned Valu...

Страница 49: ...ase to phase voltage sample n 11 φf Power angle between current and phase voltage f φ1 φ2 or φ3 12 Uc Agreed supply voltage Equations Voltage N u U 2 n N 1 n f Phase voltage N 128 samples in one period up to 65 Hz N 128 samples in Mv periods above 65 Hz Example 400 Hz N 7 N 2 yn xn N 1 n xy u u U Phase to phase voltage ux uy phase voltages Uf N a number of samples in a period Current N i I 2 n N 1...

Страница 50: ...t 3 2 1 t S S S S Total apparent power Sf apparent power by phases 2 f 2 f f f P S SignQ Q ϕ Reactive power by phases standard Sf apparent power by phases Pf active power by phases N n N n f n f f i u N Q 1 4 1 Reactive power by phases delayed current method N a number of samples in a period n sample number 0 n N f phase designation 3 2 1 t Q Q Q Q Total reactive power Qf reactive power by phases ...

Страница 51: ...HD U 1 63 2 n 2 f Phase voltage THD U1 value of first harmonic n number of harmonic 100 U Un THD U 1 63 2 n 2 ff Phase to phase voltage THD U1 value of first harmonic n number of harmonic Energy exponent price Tarif 10 Price in tariff Price Total exponent of tariff price and energy price in all tariffs DEIF A S reserves the right to change any of the above ...

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