Mikro DPM680 Instruction Manual
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Mikro DPM680 Instruction Manual

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  • Page 2 Mikro shall not be liable for errors contained herein including any incidental and/or consequential damages arising from the use of this material. Mikro also reserves the right to vary the product from that described in this material without prior notice.

  • Page 3: Table Of Contents

    TaBlE of ConTEnT 3.3.9 Voltage Harmonics Table 1. IntroDuction 3.3.10 Voltage Waveform 1.1 How to Use This Manual 3.4 CURRENT sub-menu 1.2 Content of Box 3.4.1 Phase Current 1.3 Parts of the Power Meter 3.4.2 Maximum Current 3.4.3 Minimum Current 2.
  • Page 4 3.8.4 For Factory Use Only 3.6.10 Minimum Reactive Power 3.6.11 Maximum Apparent Power 4. WebPage oPerations 3.6.12 Minimum Apparent Power (only for DPM680) 3.7 ENERGY sub-menu 4.1 Voltage and Current page 3.7.1 Active Energy 4.2 Energy and Power page 3.7.2 Reactive Energy 4.3 Parameter Setting page...

  • Page 5: Introduction

    4 deals with the Webpage Operations. Finally, chapter 5 on the Modbus Operations It’s large colour graphics LCD also displays: should be used in conjunction with the DPM680 • Scalable voltage and current waveforms Modbus communication Manual that can be •...
  • Page 6 Detailed technical specifications and parametric limits are listed in Appendix A. Fig 1 : Operation tree diagram Phase Voltage Line Voltage Maximum Phase Voltage Minimum Phase Voltage Maximum Line Voltage Voltage Minimum Line Voltage Sequence Voltages Voltage Harmonics Voltage THD Voltage Harmonics Table Voltage Waveform Phase Current...
  • Page 7 Displacement PF (DPF) Max/Min Inductive PF PF / Freq Max/Min Capacitive PF Max/Min Frequency Active Power Reactive Power Apparent Power Power Total Power Power Demand Maximum Power Demand Maximum Active Power Minimum Active Power Maximum Reactive Power Minimum Reactive Power Maximum Apparent Power Minimum Apparent Power Active Energy...

  • Page 8: Content Of Box

    ConTEnT of Box Upon opening this box, you should find the following items shown in Table 1: Table 1 : Parts list Description Quantity DPM680/B power meter Retainer clip Control power plug RS-485 plug Voltage input plug This instruction manual parTs of THE powEr METEr Fig 2 shows the outline dimension of the power meter.
  • Page 9 Metering current connection RS-485 port RS-485 connection for Modbus RTU RJ45 port LAN connection for Modbus TCP/IP & webserver (only for DPM680) Retainer clip Clip to hold meter in cut out hole Retainer clip slot Location to slide the retainer clips...

  • Page 10: Installation

    Please note that incorrect installation may impair the operation or even damage the meter. insTallaTion There is no user servicable part in the meter. Tampering with the meter may damage the meter, resulting in injury or even death and also voiding any warranty.
  • Page 11 a) provide a cut out hole on the switchgear and Please make sure the power to control panel according to DIN43700/ANSI the voltage metering input is totally C39.1 as shown in Fig 4. removed. b) insert the meter through the hole and slide in the Upon completing this step, please insert the retainer clip along the slots on both sides of the detachable terminal block securely into the...
  • Page 12 Fig 6 : Fig 7 : 3-phase star plus neutral, 3-phase star plus neutral, 4CTs with direct voltage input connection 3CTs with direct voltage input connection 90~415 V AC / 90~415 V AC / 100~300 V DC 100~300 V DC Ethernet Ethernet (Only for DPM 680)
  • Page 13 Please make sure the power to the Fig 10 : 3-phase and neutral CT connections meter control is totally removed. The meter control power supply MUST be connected via an external circuit breaker and be protected by a CAT IV fuse. The recommended fuse part no is LVSP5 from Littelfuse.

  • Page 14: Meter Setup

    Modbus RTU is used, remove the g) for DPM680, if Modbus TCP/IP or the web- detachable terminal block from the RS-485 server is used, simply connect the LAN cable’s port and connect the Modbus communication RJ45 connector to the RJ45 port shown in Fig 3.

  • Page 15: Tcp/Ip Connection Setup

    To reset the energy register values, please see • maximum power demand, see section 3.6.6 section 3.7.5 • maximum and minimum active power, see sections 3.6.7 & 3.6.8 The following parameters should also be • maximum and minimum reactive power, see reviewed against the default value and modified sections 3.6.9 &...
  • Page 16 Only devices within the sub-network as defined by the subnet mask can communicate with the meter. In the instance of the above default subnet mask, only devices (e.g. PC or router, etc.) with IP addresses that begin with 192.168.28 can communicate with the meter.

  • Page 17: Meter Operations

    METEr opEraTions The power meter front panel user interface comes with a large colour LCD display and 4 touch buttons, labelled F1, F2, F3 and F4 as shown in Fig 15. To touch the button, simply place a finger on the square below the labels corresponding to the menu item at the bottom of the display.

  • Page 18: Password Authentication

    TouCH BuTTon funCTions: • when any button is touched, the Main passworD Menu will be displayed as shown in Fig 16 below. auTHEnTiCaTion For authentication in the parameter setting • to go to the sub-menu of interest, touch the operations, the user may be prompted for a valid select (f2) button in multiple times until password.
  • Page 19 noTE: TouCH BuTTon funCTions: The device password will be used for all • to increase the number, touch the uP (f2) authentication purposes except in the button. factory settings sub page. • to decrease the number, touch the DoWn (f3) button. The default device password is 9999.

  • Page 20: Voltage Sub-Menu

    noTE: VolTaGE suB-MEnu In a delta system without any neutral as shown The Voltage sub-menu allows the selection of in Figs 8 and 9, the phase quantities are voltage parameter pages as shown in Fig 18 and measured with respect to a virtual neutral point. its continuation in Fig 19: Fig 18 : VOLTAGE sub-menu TouCH BuTTon funCTions:...

  • Page 21: Phase Voltage

    3.3.1 3.3.2 pHasE VolTaGE linE VolTaGE The Phase Voltage page shows the true RMS The line Voltage page shows the true RMS voltage of each phase as shown in Fig 20 below: voltage between any 2 phases as shown in Fig 21: Fig 21 : Line Voltage page Fig 20 : Phase Voltage page TouCH BuTTon funCTions:...

  • Page 22: Maximum Phase Voltage

    3.3.3 TouCH BuTTon funCTions: MaxiMuM pHasE VolTaGE • to confirm clearing the recorded values, touch The Maximum Phase Voltage page shows the the yes (f4) button. recorded maximum true RMS phase voltage with the corresponding time and date since the last •...

  • Page 23: Maximum Line Voltage

    Fig 24 : Maximum Line Voltage page The time and date records are displayed in the hour:minute:second day-month-year format. TouCH BuTTon funCTions: • to reset the recorded minimum voltage values to zero, touch the reset (f3) button. • otherwise, touch the bacK (f1) button to return to the Voltage sub-menu.

  • Page 24: Minimum Line Voltage

    When these recorded values are cleared, the TouCH BuTTon funCTions: corresponding time and date records are also • to reset the recorded minimum voltage values cleared to the default 00:00:00 00-00-2000. to zero, touch the reset (f3) button. • otherwise, touch the bacK (f1) button to 3.3.6 return to the Voltage sub-menu.

  • Page 25: Voltage Harmonics

    Fig 26 : Sequence Voltages page 3.3.8 VolTaGE HarMoniCs The Voltage harmonics page shows the voltage harmonics spectrum and the voltage Total Harmonics Distortion (THD) of each phase. Upon entering this parameter page, the voltage harmonics spectrum will be displayed as shown in Fig 27: Fig 27 : Voltage Harmonics page TouCH BuTTon funCTions:...

  • Page 26: Voltage Harmonics Table

    TouCH BuTTon funCTions: TouCH BuTTon funCTions: • to alternate between the odd and even • to return to the Voltage harmonics page, harmonics spectrum display, touch the eVen touch the bacK (f4) button (f2) or oDD (f2) button. • to display the spectrum of the next phase, touch the neXt (f3) button.

  • Page 27: Voltage Waveform

    3.3.10 TouCH BuTTon funCTions: VolTaGE waVEforM • touch any one button (f1, f2, f3 or f4) once The Voltage Waveform page shows the phase to view the voltage harmonics content of voltage waveform of all phases as shown in phase L2. Fig 30: •...

  • Page 28: Current Sub-Menu

    noTE: CurrEnT suB-MEnu The displayed waveform is solely for visual The current sub-menu allows the selection of inspection and not for measurement purposes. current parameter pages as shown in Fig 31 and The waveform is the captured voltage at its continuation in Fig 32: the metering voltage input, not necessarily Fig 31 : CURRENT sub-menu the actual phase voltage, especially when...

  • Page 29: Phase Current

    3.4.1 TouCH BuTTon funCTions: pHasE CurrEnT • to select the parameter page of interest, The Phase current page shows the true RMS touch either the uP (f2) or DoWn (f3) current of each phase and where applicable, button until the parameter item is highlighted neutral as shown in Fig 33: (within a dashed rectangular box and a RED dot to its left).

  • Page 30: Maximum Current

    3.4.2 In clearing the recorded values, the user will be prompted with a clear logged Data? MaxiMuM CurrEnT confirmation. The Maximum current page shows the recorded maximum true RMS current of each TouCH BuTTon funCTions: phase and where applicable, neutral with the •...

  • Page 31: Minimum Current

    3.4.3 MiniMuM CurrEnT TouCH BuTTon funCTions: The Minimum current page shows the recorded • to reset the recorded minimum current values minimum true RMS current of each phase and to zero, touch the reset (f3) button. where applicable, neutral with the corresponding time and date since the last reset as shown in •...

  • Page 32: Current Demand

    3.4.4 TouCH BuTTon funCTions: CurrEnT DEManD • to jump to the current Demand setup page The current Demand page shows the current as shown in Fig 37, touch the set (f2) averaged over a demand interval for each phase button. as shown in Fig 36.
  • Page 33 • to select the next field to change, touch the • otherwise, touch the bacK (f1) button to neXt (f4) button and repeat the above 2 return to the current sub-menu. steps. • to save the settings and/or return to the In the input mode, the uP (f2) and DoWn (f3) current Demand page, touch the bacK buttons will become active and the background...

  • Page 34: Maximum Current Demand

    3.4.5 • otherwise, touch the bacK (f1) button to MaxiMuM CurrEnT return to the current sub-menu. DEManD The Maximum current Demand page shows In clearing the recorded values, the user the recorded maximum current demand for each will be prompted with a clear logged Data? phase with the corresponding time and date since confirmation.

  • Page 35: Current Harmonics

    3.4.7 Fig 39 : Sequence Current page CurrEnT HarMoniCs The current harmonics page shows the current harmonics spectrum and the current Total Hormonic Distortion (THD) of each phase. Upon entering this parameter page, the current harmonics spectrum will be displayed as shown in Fig 40.

  • Page 36: Current Harmonics Table

    TouCH BuTTon funCTions: TouCH BuTTon funCTions: • to alternate between the odd and even • to return to the current harmonics page, harmonics spectrum display, touch the eVen touch the bacK (f4) button. (f2) or oDD (f2) button. • to display the spectrum of the next phase, touch the neXt (f3) button.

  • Page 37: Current Waveform

    3.4.9 TouCH BuTTon funCTions: CurrEnT waVEforM • touch any one button (f1, f2, f3 or f4) once The current Waveform page shows the current to view the current harmonics content of waveform of all phases as shown in Fig 43: phase L2.

  • Page 38: Pf & Frequency Sub-Menu

    shown in Fig 44: noTE: The displayed waveform is solely for visual Fig 44 : PF & FREQUENCY sub-menu inspection and not for measurement purposes. The waveform is the captured current at the metering current input, not necessarily the actual phase current. TouCH BuTTon funCTions: •...

  • Page 39: Power Factor (Pf)

    3.5.1 3.5.2 powEr faCTor (pf) pf & frEquEnCY The Pf & frequency page shows the summary The Power factor page shows the total power of the overall total power factor as well as the factor for each phase as well as the overall total power frequency as shown in Fig 45: power factor as shown in Fig 46.

  • Page 40: Displacement Pf (Dpf)

    • otherwise, touch the bacK (f1) button to TouCH BuTTon funCTions: return to the Pf & freQuency sub-menu. • to jump to the Power factor page, touch the Pf (f3) button. • to jump to the Pf & freQuency page, touch the all (f4) button.

  • Page 41: Max/Min Capacitive Pf

    3.5.5 The time and date records are displayed in the hour:minute:second day-month-year format. Max/Min CapaCiTiVE pf The Max/Min capacitive Pf page shows the TouCH BuTTon funCTions: recorded maximum and minimum capacitive • to reset the recorded maximum and minimum power factor with the corresponding time and date PF values to zero, touch the reset (f3) since the last reset as shown in Fig 49: button.

  • Page 42: Max/Min Frequency

    In clearing the recorded values, the user The time and date records are displayed in the will be prompted with a clear logged Data? hour:minute:second day-month-year format. confirmation. TouCH BuTTon funCTions: TouCH BuTTon funCTions: • to reset the recorded maximum and minimum •...

  • Page 43: Power Sub-Menu

    TouCH BuTTon funCTions: powEr suB-MEnu • to select the parameter page of interest, The PoWer sub-menu allows the selection of touch either the uP (f2) or DoWn (f3) power parameter pages as shown in Fig 51 and button until the parameter item is highlighted its continuation in Fig 52: (within a dashed rectangular box and a RED dot to its left).

  • Page 44: Reactive Power

    TouCH BuTTon funCTions: • to jump to the total Power page, touch the all (f2) button. Fig 54 : Reactive Power page • to jump to the reactive Power page, touch the Q (f3) button. • to jump to the apparent Power page, touch the s (f4) button.

  • Page 45: Apparent Power

    3.6.3 3.6.4 apparEnT powEr ToTal powEr The apparent Power page shows the nett apparent The total Power page shows the total nett power power for each phase as well as the total nett flow for active, reactive and apparent power as apparent power as shown in Fig 55: shown in Fig 56: Fig 55 : Apparent Power page...

  • Page 46: Power Demand

    3.6.5 powEr DEManD Fig 58 : Power Demand Setup page The Power Demand page shows the power averaged over a demand interval for active, reactive and apparent power as shown in Fig 57. Please see section B.1 in Appendix B for details. Fig 57 : Power Demand page TouCH BuTTon funCTions: •...

  • Page 47: Maximum Power Demand

    TouCH BuTTon funCTions: noTE: • to abort saving the settings and return to the The demand interval in secs must be whole Power Demand page, touch the no (f3) number multiples of the number of sub button. intervals and the sub interval period must be longer than 15 sec.

  • Page 48: Maximum Active Power

    3.6.7 The time and date records are displayed in the hour:minute:second day-month-year format. MaxiMuM aCTiVE powEr The Maximum active Power page shows the TouCH BuTTon funCTions: recorded maximum active power for each phase • to reset the recorded maximum power as well as the maximum total active power with demand values to zero, touch the reset the corresponding time and date since the last...

  • Page 49: Minimum Active Power

    In clearing the recorded values, the user will be prompted with a clear logged Data? confirmation. TouCH BuTTon funCTions: Fig 61 : Minimum Active Power page • to confirm clearing the recorded values, touch the yes (f4) button. • otherwise, touch the no (f2) button. When these recorded values are cleared, the corresponding time and date records are also cleared to the default 00:00:00 00-00-2000.

  • Page 50: Maximum Reactive Power

    The time and date records are displayed in the TouCH BuTTon funCTions: hour:minute:second day-month-year format. • to confirm clearing the recorded values, touch the yes (f4) button. TouCH BuTTon funCTions: • to reset the recorded maximum reactive • otherwise, touch the no (f2) button. power values to zero, touch the reset (f3) button.

  • Page 51: Minimum Reactive Power

    3.6.10 MiniMuM rEaCTiVE powEr TouCH BuTTon funCTions: The Minimum reactive Power page shows the • to reset the recorded minimum reactive recorded minimum reactive power for each phase power values to zero, touch the reset as well as the minimum total reactive power with (f3) button.

  • Page 52: Maximum Apparent Power

    3.6.11 MaxiMuM apparEnT powEr The Maximum apparent Power page shows the recorded maximum apparent power for each phase as well as the maximum total apparent TouCH BuTTon funCTions: power with the corresponding time and date • to reset the recorded maximum apparent since the last reset as shown in Fig 64: power values to zero, touch the reset Fig 64 : Maximum Apparent Power page...

  • Page 53: Minimum Apparent Power

    3.6.12 MiniMuM apparEnT powEr The Minimum apparent Power page shows the recorded minimum apparent power for each phase as well as the minimum total apparent power with the corresponding time and date TouCH BuTTon funCTions: since the last reset as shown in Fig 65: •...

  • Page 54: Energy Sub-Menu

    3.7.1 EnErGY suB-MEnu aCTiVE EnErGY The energy sub-menu allows the selection of The active energy page shows the nett active energy parameter pages as shown in Fig 66: energy for each phase as well as the total nett active energy as shown in Fig 67: Fig 66 : ENERGY sub-menu Fig 67 : Active Energy page The displayed values may be incomplete due to...

  • Page 55: Reactive Energy

    • to jump to the reactive energy page, touch TouCH BuTTon funCTions: the Q (f4) button. • to view the digits on the right of the displayed numbers, touch the < (f2) button. • otherwise, touch the bacK (f1) button to •...

  • Page 56: Total Energy

    The displayed values may be incomplete due to Fig 70 : Total Energy page the limited display width. Use the < and > buttons to view the complete values. TouCH BuTTon funCTions: • to view the digits on the right of the displayed numbers, touch the <...

  • Page 57: Reset Energy Counters

    3.7.5 Fig 71 : SETTING sub-menu rEsET EnErGY CounTErs When the reset energy counter page is selected, the user will be prompted with a clear all registers? confirmation. TouCH BuTTon funCTions: • to abort clearing the energy register values, touch the no (f2) button. •...

  • Page 58: Ct & Vt Ratios

    3.8.1 CT & VT raTios The ct & Vt ratios page as shown in Fig 72 TouCH BuTTon funCTions: displays and allows the setting of the current • to input new settings, touch the set (f4) transformer (CT) and voltage transformer (VT) button.

  • Page 59: Communication Settings

    3.8.2 The user will be prompted to confirm the saving of settings. CoMMuniCaTion sETTinGs (onlY for DpM680) TouCH BuTTon funCTions: The communication settings page displays • to abort saving the settings, touch the no and allows the setting of the communication (f3) button to return to the setting sub- parameters as shown in Fig 73.

  • Page 60: Ethernet (Tcp/Ip)

    3.8.2.1 noTE: ETHErnET (TCp/ip) The DHCP Enable field must be toggled to (onlY for DpM680) NO in order to use the alternate fixed TCP/ IP settings. The ethernet (tcP/iP) sub-page as shown in Fig 74 displays and allows the setting of DHCP and...

  • Page 61: Modbus

    3.2. return to the communication settings page (only for DPM680) or the setting sub-menu. The meter MUST be powered off and on for the new IP settings to take effect.

  • Page 62: View Network Details

    Enabling the remote set allows the remote terminal to read and write the meter settings via Modbus RTU or Modbus TCP/IP (only for DPM680), otherwise the setting data can only be read. Before the saving of settings, the user will be...

  • Page 63: System Settings

    If the network connection is inactive, zeros would TouCH BuTTon funCTions: displayed in every field. If the network connection • to select the parameter sub-page of interest, is active and DHCP is enabled, the TCP/IP touch either the uP (f2) or DoWn (f3) settings dynamically assigned by the DHCP button until the parameter item is highlighted server would be displayed.

  • Page 64: Date & Time

    In the input mode, the uP (f2) and DoWn (f3) TouCH BuTTon funCTions: buttons will become active and the background • to return to the system settings page, colour of the active field will be changed to white. touch the bacK (f2) button. TouCH BuTTon funCTions: 3.8.3.2 •...

  • Page 65: Change Device Password

    3.8.3.3 The UTC Time is the zone time difference between the local time and the Coordinated CHanGE DEViCE Universal Time. Its valid range is from -13 to +12. passworD If the meter is connected to the Internet, the UTC value from the Internet time server duly adjusted To enter the change Device Password sub- for the zone time difference will automatically page, the user will be prompted for password...

  • Page 66: Factory Settings

    3.8.3.4 In the input mode, the uP (f2) and DoWn (f3) faCTorY sETTinGs buttons will become active and the background The factory settings sub-page displays a colour of the active field will be changed to white. warning message that all settings (and device password) will be reset to the factory default TouCH BuTTon funCTions: values except the energy register values.

  • Page 67: Display Settings

    3.8.3.5 In the input mode, the uP (f2) and DoWn (f3) buttons will become active and the background DisplaY sETTinGs colour of the active field will be changed to white. The Display settings sub-page as shown in Fig 81 displays and allows the setting of touch button inactivity time duration before the LCD display TouCH BuTTon funCTions: is turned off.

  • Page 68: For Factory Use Only

    This main webpage displays the following parameters: wEBpaGE opEraTions • line voltage: between any 2 phases. (onlY for DpM680) • phase voltage: all phases. The webpages stored in the meter’s built-in server can be accessed by a browser. However, • maximum/peak phase voltage: all phases.
  • Page 69 By clicking on the links at the bottom of the webpage, the browser will download the corresponding webpage. Clicking on the Voltage and current link will reload this webpage. Fig 82 : Voltage and Current webpage display...

  • Page 70: Energy And Power Page

    EnErGY anD powEr • maximum/peak active, reactive and paGE apparent power demand. The energy and Power webpage can be downloaded by clicking on the energy and • nominal thermal current demand: all Power link in other webpages of the meter. The phases.
  • Page 71 Fig 83 : Energy and Power webpage display...

  • Page 72: Parameter Setting Page

    paraMETEr sETTinG paGE The Parameter setting webpage can be noTE: downloaded by clicking on the Parameter The CT secondary current is fixed at 5A. setting link in other webpages of the meter. The webpage as shown in Fig 84 should By clicking on the links at the bottom, the brower appear.
  • Page 73 Fig 84 : Energy and Power webpage display...

  • Page 74: Webpage Password

    50,000V. The factory default webpage password is dpm680. • the VT secondary voltage is between 60V and 300V AND it is lower than the VT primary The user is advised to set his own webpage voltage.

  • Page 75: Modbus Operations

    10M/100M addresses are similar for both protocols Base T Ethernet, based on IPv4. The meter and they are listed in the DPM680 Modbus may auto-negotiate with the PC or router communication Manual which can be whenever possible to run at 100M Base T speed downloaded from the www.itmikro.com website.

  • Page 76: Troubleshooting Guide

    TrouBlEsHooTinG GuiDE The meter contains no user serviceable parts. Please contact your dealer or local sales representative should the meter require maintenance service. Table 4 shows some basic checking that can be Please do NOT open the meter. done at the user level to identify some possible Doing so will void the warranty and causes of problems and possible solutions.

  • Page 77: Appendix A Specifications

    appEnDix a spECifiCaTions Table A.1 below shows the list of measurement parameters and their associated limits and resolution. It also shows the display, communication, environmental and mechanical attributes of the meter, including standards compliance. Table A.1 Specification list...
  • Page 78 Table A.1 Specification list...
  • Page 79 Table A.1 Specification list...
  • Page 80 Table A.1 Specification list...

  • Page 81: Appendix B Numerical Methods

    appEnDix B nuMEriCal METHoDs b.1 DeManD calculation Demand parameters are used to show average values over a demand interval. This power meter calculates the demand quantity by using the sliding block method. In this method, the demand interval is divided into n sub intervals. For each sub interval s, the quantity average, qs is taken.

  • Page 82: B.2 Total Harmonic Distortion Calculation

    b.2 total harMonic Distortion calculation Total Harmonic Distortion (THD) is a power quality indicator used to show the extent of voltage and current waveform distortion by the load. The THD is calculated by the following equation: THD={h +..+h }/ h x100% where h represents the n...

  • Page 83: B.4 Power Factor Calculation

    b.4 PoWer factor calculation The total power factor is a measure of effectiveness of actual power transfer and it is calculated by the following equation: Total power factor = Active power / {RMS voltage x RMS current} = Active power / Apparent power The overall total power factor is calculated based on arithmetic apparent power and total active power.

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