METREL MI 2891 Instruction Manual
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METREL MI 2891 Instruction Manual

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Power Simulator
MI 2891
Instruction manual
Version 1.1.2, Code No. 20 752 463

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Summary of Contents for METREL MI 2891

  • Page 1 Power Simulator MI 2891 Instruction manual Version 1.1.2, Code No. 20 752 463...
  • Page 2 Mark on your equipment certifies that it meets European Union requirements for EMC, LVD, ROHS regulations. © 2016 METREL No part of this publication may be reproduced or utilized in any form or by any means without permission in writing from METREL.

  • Page 3: Table Of Contents

    MI 2891 Power Simulator Table of contents Introduction ......................5 Main Features ....................5 Safety considerations ..................6 Applicable standards ..................6 Abbreviations ....................7 Description ......................8 Front panel ....................... 8 Connector panel ....................9 Bottom view ....................10 Accessories ....................
  • Page 4 MI 2891 Power Simulator Table of contents 4.1.2 Colour model ................... 39 Instrument Connection ..................41 Wiring Power Simulator MI2981 to Power Master 2982........41 Simulation campaign ..................41 Technical specifications ..................44 General specifications ..................44 Signal generator ..................... 44 6.2.1...

  • Page 5: Introduction

    MI 2891 Power Simulator Introduction 1 Introduction Power Simulator is handheld multifunction four-phase instrument for simulation of typical voltages and current shapes and situations on electrical network. Figure 1.1: Power Simulator instrument 1.1 Main Features  Simple and powerful waveform generator with various settings.

  • Page 6: Safety Considerations

    MI 2891 Power Simulator Introduction  Simultaneous voltage and current generation with eight 16-bit DA converters for accurate signal generation.  Various event simulation: dip, swell, interrupt, inrush, transient and signalling.  Voltage and current harmonics waveform simulation.  Unbalanced voltage and current waveform simulation.

  • Page 7: Abbreviations

    MI 2891 Power Simulator Introduction EN 61326-2-2: 2013 Electrical equipment for measurement, control – – and laboratory use EMC requirements Part 2-2: Particular requirements Test configurations, operational conditions performance criteria for portable test, measuring and monitoring equipment used in low-voltage distribution systems ...

  • Page 8: Description

    MI 2891 Power Simulator Description 2 Description 2.1 Front panel Figure 2.1: Front panel Front panel layout: 1. LCD Colour TFT display, 4.3 inch (10.9 cm), 480 x 272 pixels. 2. F1 – F4 Function keys. 3. ARROW keys Moves cursor and selects parameters.

  • Page 9: Connector Panel

    MI 2891 Power Simulator Description 2.2 Connector panel Warnings! Use safety test leads only! Max. short-term voltage of external power supply adapter is 14 V! Always turn off Power Simulator before plugging in or plugging out test leads. Always connect leads on Power Simulator first to avoid electric shock hazard.

  • Page 10: Bottom View

    MI 2891 Power Simulator Description 2.3 Bottom view Figure 2.4: Bottom view Bottom view layout: 1. Battery compartment cover. 2. Battery compartment screw (unscrew to replace the batteries). 3. Serial number label. 2.4 Accessories 2.4.1 Standard accessories Table 2.1: Power Master standard accessories...

  • Page 11: Operating The Instrument

    MI 2891 Power Simulator Operating the instrument 3 Operating the instrument This section describes how to operate the instrument. The instrument front panel consists of a colour LCD display and keypad. Generated waveforms and instrument status are shown on the display. Basic display symbols and keys description are shown on figure below.

  • Page 12: Instrument Status Bar

    MI 2891 Power Simulator Operating the instrument Screen Name Status Bar Y-axsis scale X-axsis scale (time) Options function keys (F1 – F4) Figure 3.2: Common display symbols and labels on SCOPE screen 3.1 Instrument status bar Instruments status bar is placed on the top of the screen. It indicates different instrument states.

  • Page 13: Instrument Keys

    MI 2891 Power Simulator Operating the instrument Harmonics on current outputs are generated. Harmonics on voltage outputs are generated. Harmonics on both current and voltage outputs are generated. ≠ I ≠ I Unbalance is presented on current outputs (I ≠ U ≠...

  • Page 14: Instrument Main Menu

    MI 2891 Power Simulator Operating the instrument Cursor, Enter and Escape keys are used for moving through instrument menu structure, entering various parameters. Additionally, cursor keys are used for zooming graphs and moving graph cursors. 3.3 Instrument Main Menu After powering on the instrument the “MAIN MENU” screen is displayed. From this menu all instrument options are manipulated.

  • Page 15: Fundamental Voltage

    MI 2891 Power Simulator Operating the instrument 3.3.1 Fundamental voltage By using left right cursor keys user can select system fundamental ENTER (nominal) voltage in 10 V steps within 50 V to 300 V range. Enter key allows user to enter desired nominal voltage directly. Selected voltage is immediately applied on all phases.

  • Page 16: Network Type

    MI 2891 Power Simulator Operating the instrument ENTER Phase shift can be adjusted, by entering the submenu and setting the phase angle, by which the current lead the voltage. Current lead can be set in 1° resolution within 0° to 180° range. These settings will affect phases L1, L2 and Figure 3.6: Current leads voltage by 5°...

  • Page 17: Flicker

    MI 2891 Power Simulator Operating the instrument  Manual – user defined harmonic set is generated on current output. See section 3.7 Harmonics for details how to define harmonic set. 3.3.7 Flicker By using left right cursor, user can enable or disable flicker generator. If...

  • Page 18: Event Occurrence

    MI 2891 Power Simulator Operating the instrument  Dip – voltage dip  Swell – voltage swell  Interrupt – voltage interrupt  Inrush – inrush current  Signalling – signalling voltage event for remote control of network equipment  Transient – voltage transient See section 3.10 Events for event setup and configuration.

  • Page 19: Factory Reset

    MI 2891 Power Simulator Operating the instrument Swapping channels emulate faulty wiring between simulator and analyser (in this example wire L1 and L3). Power Meter Power Simulator MI2892 MI2891 Figure 3.8: Swapping instrument channels 3.3.14 Factory reset Factory reset set instrument settings to factory default settings. Note, that this will reset all user defined parameters.

  • Page 20: Scope Screen

    MI 2891 Power Simulator Operating the instrument Long press (2 s) Changes between load/generator network type. 3.5 Scope screen Voltage and current parameters can be observed in the scope screen. Currently generating waveform can be viewed in graphical form (SCOPE). User can enter the screens by pressing key from Main menu.

  • Page 21: Phase Diagram

    MI 2891 Power Simulator Operating the instrument Shows voltage and current waveform (dual graph). U I U,I Selects between phase, neutral, all-phases and line view: Shows waveforms for phase L1. 2 3 N  Δ Shows waveforms for phase L2.

  • Page 22: Unbalance Diagram

    MI 2891 Power Simulator Operating the instrument Table 3.8: Instrument screen symbols and abbreviations Frequency. Fundamental voltages Ufund , Ufund , Ufund with relative phase U1, U2, U3 angle to Ufund Fundamental currents Ifund , Ifund , Ifund with relative phase angle...

  • Page 23: Harmonics

    MI 2891 Power Simulator Operating the instrument Table 3.10: Instrument screen symbols and abbreviations Zero sequence voltage component U Zero sequence current component I Positive sequence voltage component U Positive sequence current component I Negative sequence voltage component U Negative sequence current component I...

  • Page 24: Harmonics Settings Screen

    MI 2891 Power Simulator Operating the instrument 3.7.1 Harmonics settings screen By entering either Voltage or Current harmonics option from MAIN MENU, harmonics screen is shown (see figures below). In these screens, voltage or current harmonics are shown. All values presented are in % of phase fundamental voltage / current).

  • Page 25: Histogram (Bar)

    MI 2891 Power Simulator Operating the instrument Table 3.12: Instrument screen symbols and abbreviations Total voltage / current harmonic distortion THD and THD in absolute values (V or A) or in % of fundamental voltage / current harmonic. h1 … h50...

  • Page 26: Flickers

    MI 2891 Power Simulator Operating the instrument Description of symbols and abbreviations used in BAR screens are shown in table below. Table 3.14: Instrument screen symbols and abbreviations Ux h01 … h50 Voltage harmonic component in V and in % of fundamental voltage;...

  • Page 27: Edit Menu

    MI 2891 Power Simulator Operating the instrument Figure 3.20: Flicker settings menu Description of symbols and abbreviations used in FLICKERS screen is shown in table below. Table 3.16: Instrument screen symbols and abbreviations Short term flicker perceptibility. Voltage changes per minute.
  • Page 28 MI 2891 Power Simulator Operating the instrument Figure 3.21: U,I: Parameters screen User can move between parameters using cursor keys. By pressing ENTER key, parameter value selection window is displayed. By pressing cursor keys, parameter value is changed. Selection window can be closed by using either ESC or ENTER key.

  • Page 29: Events

    MI 2891 Power Simulator Operating the instrument System frequency can be set:  when chosen, user can set frequency in 1 Hz step by using left/right arrow keys,  when chosen, user can enter selection menu by pressing ENTER key, then set desired frequency in 0.01 Hz step within frequency range 45.00 Hz to 70.00 Hz...

  • Page 30: Dip

    MI 2891 Power Simulator Operating the instrument 3.10.1 Voltage Dip is sudden voltage reduction, followed by voltage recovery after a short time interval, from a few periods of the sinusoidal wave of the voltage to a few seconds. 0.02 0.04 0.06...

  • Page 31: Swell

    MI 2891 Power Simulator Operating the instrument Modifies parameter. Enters parameter value selection window. ENTER Returns to the Main menu. Exits from parameter value selection window. 3.10.2 Swell Swell is sudden voltage increase, followed by voltage recovery after a short time interval, from a few periods to a few seconds.

  • Page 32: Interrupt

    MI 2891 Power Simulator Operating the instrument Table 3.21: Keys in swell settings submenu Refresh (activate) currently set swell. Scrolls cursor between options. Modifies parameter. Enters parameter value selection window. ENTER Returns to the Main menu. Exits from parameter value selection window.

  • Page 33: Inrush

    MI 2891 Power Simulator Operating the instrument Figure 3.31: Interrupt settings submenu Table 3.22: Keys in interrupt settings submenu Refresh (activate) currently set interrupt. Scrolls cursor between options Modifies parameter. Enters parameter value selection window. ENTER Returns to the Main menu.
  • Page 34 MI 2891 Power Simulator Operating the instrument    log( to particular part of the voltage waveform, inrush 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 -100 -200 -300 -400 T [s] Figure 3.33: Inrush on current In practice, inrush current event will generate approximately 50% overshoot of Fundamental current and it will last about 10 seconds.

  • Page 35: Signalling

    MI 2891 Power Simulator Operating the instrument 3.10.5 Signalling Signalling voltage is voltage superimposed to the output voltage for the purpose of transmission of information in the public supply network and to network users' premises. Power simulator provides “ripple control signal”: superimposed sinusoidal voltage signals in the frequency range 70 Hz to 3 000 Hz.

  • Page 36: Transient

    MI 2891 Power Simulator Operating the instrument Table 3.24: Keys in signalling settings submenu Refresh (activate) currently set signalling. Scrolls cursor between options Modifies parameter. Enters parameter value selection window. ENTER Returns to the Main menu. Exits from parameter value selection window.

  • Page 37: Swap Connection Terminals

    MI 2891 Power Simulator Operating the instrument New settings will apply when SET is pressed or when Transient settings submenu is closed. Figure 3.38: Transient settings submenu Table 3.25: Keys in transient settings submenu Refresh (activate) currently set transient. Modifies parameter.

  • Page 38: General Setup

    MI 2891 Power Simulator General Setup Table 3.26: Keys in Swap connections screen Activates swap of Voltage / Current channels. RESET Set Voltage / Current channels to normal connection. Enters parameter value selection window. ENTER Modifies parameter (in selection window).

  • Page 39: Instrument Info

    MI 2891 Power Simulator General Setup 4.1.1 Instrument info Basic information concerning the instrument (company, serial number, firmware and hardware version) can be viewed in this menu. Figure 4.2: Instrument info screen Table 4.3: Keys in Instrument info screen Returns to the General setup menu.
  • Page 40 MI 2891 Power Simulator General Setup Keys in Edit colour screen: Shows selected colour for phase L1. L2 L3 N Shows selected colour for phase L2. L3 N Shows selected colour for phase L3. L1 L2 Shows selected colour for neutral L1 L2 L3 channel N.

  • Page 41: Instrument Connection

    5 Instrument Connection 5.1 Wiring Power Simulator MI2981 to Power Master 2982 This section describes how to connect Power Simulator MI 2891 to Power Master MI 2892 using enclosed test leads. All outputs from Power Simulator MI 2891 should be connected to adequate inputs of Power Master MI 2892.
  • Page 42 Disconnect test leads Figure 5.2: Recommended simulation practice Step 1: Instrument setup Preparation of Power Simulator MI 2891 and Power Master MI 2892 includes the following steps:  Visually check both instruments and accessories.  Make sure, that Power Simulator MI 2891 is turned off.
  • Page 43 MI 2891 Power Simulator Instrument Connection Step 2: Set connection properties Simulator setup adjustment is performed after we find out details regarding wanted simulated waveform:  set desired fundamental voltage level,  set clamps current,  set system frequency,  set harmonics/events/flickers/unbalances… as desired.

  • Page 44: Technical Specifications

    MI 2891 Power Simulator Technical specifications 6 Technical specifications 6.1 General specifications -20 C … 40 C Working temperature range: -40 C … 70 C Storage temperature range: 95 % RH (0 C … 40 C), non-condensing Max. humidity: Pollution degree:...

  • Page 45: Current

    MI 2891 Power Simulator Technical specifications , AC+DC Event RMS voltage output: U 1Rms 2Rms 3Rms NRms Event voltage Resolution Accuracy 0 … 350 V ± 2 % 1 % of fundamental output voltage 6.2.3 Current , AC+DC. Fundamental RMS current I...
  • Page 46 MI 2891 Power Simulator Technical specifications -20 C … 70 C ± 3.5 ppm 0.3 s/day 0 C … 40 C ± 2.0 ppm 0.17 s/day Event duration uncertainty Measuring Range Resolution Error Event  1 cycle 1 s … 60 s...

  • Page 47: Maintenance

    MI 2891 Power Simulator Maintenance 7 Maintenance 7.1 Inserting batteries into the instrument Make sure that the power supply adapter/charger and measurement leads are disconnected and the instrument is switched off before opening battery compartment cover (see Figure 2.4). Insert batteries as shown in figure below (insert batteries correctly, otherwise the instrument will not operate and the batteries could be discharged or damaged).

  • Page 48: Batteries

    MI 2891 Power Simulator Maintenance Figure 7.2: Closing the battery compartment cover Screw the cover on the instrument. Warnings!  Hazardous voltages exist inside the instrument. Disconnect all test leads, remove the power supply cable and turn off the instrument before removing battery compartment cover.

  • Page 49: Firmware Upgrade

    7.3 Firmware upgrade Metrel as manufacturer is constantly adding new features and enhance existing. In order to get most of your instrument, we recommend periodic check for software and firmware updates. In this section firmware upgrade process is described.

  • Page 50: Upgrade Procedure

    MI 2891 Power Simulator Maintenance Figure 7.3: PowerView update function 7.3.2 Upgrade procedure 1. Connect PC and instrument with USB cable 2. Establish communication between them. PowerView, ToolsOptions menu and set USB connection as shown on figure below. Figure 7.4: Selecting USB communication 3.
  • Page 51 MI 2891 Power Simulator Maintenance Figure 7.6: Version checker window 5. If your instrument have older FW, PowerView will notify you that new version of FW is available. Click on Yes to proceed. Figure 7.7: New firmware is available for download 6.
  • Page 52 8. Instrument upgrade process should begin. Please wait until all steps are finished. Note that this step should not be interrupted; as instrument will not work properly. If upgrade process goes wrong, please contact your distributor or Metrel directly. We will help you to resolve issue and recover instrument.

  • Page 53: Power Supply Considerations

    MI 2891 Power Simulator Maintenance Figure 7.10: FlashMe programming screen 7.4 Power supply considerations When using the original power supply adapter/charger the instrument is fully operational immediately after switching it on. The batteries are charged at the same time, nominal charging time is 3.5 hours.

  • Page 54: Periodic Calibration

    MI 2891 Power Simulator Maintenance  Do not use liquids based on petrol or hydrocarbons!  Do not spill cleaning liquid over the instrument! 7.6 Periodic calibration To ensure correct measurement, it is essential that the instrument is regularly calibrated. If used continuously on a daily basis, a six-month calibration period is recommended, otherwise annual calibration is sufficient.

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