METREL MI 2792 PowerQ4 Plus Instruction Manual Download Page 89

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MI 2792 PowerQ4 Plus

Recording Practice and Instrument Connection

Figure 4.5: Choosing 3-phase 3-wire system on instrument

Instrument should be connected to the network according to figure bellow.

LN L3 C

L3C

Figure 4.6: 3-phase 3-wire system

1-phase 3-wire system

In order to select this connection scheme, choose following connection on the
instrument:

Figure 4.7: Choosing 1-phase 3-wire system on instrument

Summary of Contents for MI 2792 PowerQ4 Plus

Page 1: ...PowerQ4 Plus MI 2792 Instruction manual Version 1 0 Code No 20 751 782 ...

Page 2: ...rel metrel si Mark on your equipment certifies that this equipment meets the requirements of the EU European Union concerning safety and interference causing equipment regulations 2010 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: ... 22 3 3 Power menu 25 3 3 1 Meter 25 3 3 2 Trend 26 3 4 Energy menu 28 3 5 Harmonics menu 29 3 5 1 Meter 29 3 5 2 Histogram Bar 31 3 5 3 Trend 32 3 6 Flickermeter 35 3 6 1 Meter 35 3 6 2 Trend 36 3 7 Phase Diagram 37 3 7 1 Phase diagram 37 3 7 2 Symmetry diagram 38 3 7 3 Symmetry trend 39 3 8 Temperature 41 3 8 1 Meter 41 3 8 2 Trend 41 3 9 General Recorder 42 3 10 Waveform recorder 45 3 10 1 Setu...

Page 4: ...t clamp selection and transformation ratio setting 91 4 2 4 Temperature probe connection 95 4 2 5 GPS time synchronization device connection 96 4 2 6 GPRS modem connection 97 4 3 Number of measured parameters and connection type relationship 98 5 Theory and internal operation 101 5 1 Measurement methods 101 5 1 1 Measurement aggregation over time intervals 101 5 1 2 Voltage measurement magnitude o...

Page 5: ...4 Current 125 6 2 5 Frequency 126 6 2 6 Flickermeter 126 6 2 7 Power 126 6 2 8 Power factor Pf 127 6 2 9 Displacement factor Cos φ 127 6 2 10 Energy 127 6 2 11 Voltage harmonics and THD 128 6 2 12 Current harmonics and THD 128 6 2 13 Voltage interharmonics 128 6 2 14 Current interharmonics 128 6 2 15 Signalling 129 6 2 16 Unbalance 129 6 2 17 Time and duration uncertainty 129 6 2 18 Temperature 12...

Page 6: ...amp recognition and on instrument range selection1 Compliance with power quality standard IEC 61000 4 30 Class S A Predefined recorder profile for EN 50160 survey Power measurements compliance with IEC 61557 12 and IEEE 1448 Simultaneous 8 channels 16bit AD conversion for accurate power measurements minimal phase shift error Simple to use and powerful recorder with 8 MB of memory and possibility t...

Page 7: ...logging data into multiple measurements or extract data of interest 1 2 Safety considerations To ensure operator safety while using the PowerQ4 Plus instrument and to minimize the risk of damage to the instrument please note the following general warnings The instrument has been designed to ensure maximum operator safety Usage in a way other than specified in this manual may increase the risk of h...

Page 8: ...s S Testing and measurement techniques Power quality measurement methods IEC 61557 12 2007 Equipment for testing measuring or monitoring of protective measures Part 12 Performance measuring and monitoring devices PMD IEC 61000 4 7 2002 A1 2008 Class II General guide on harmonics and interharmonics measurements and instrumentation IEC 61000 4 15 2010 Flickermeter Functional and design specification...

Page 9: ...1 for definition I Negative sequence current component on three phase systems See 5 1 11 for definition I0 Zero sequence current components on three phase systems See 5 1 11 for definition I Rms RMS current measured over each half period including Ip Rms phase p current IN Rms neutral RMS current IFnd Fundamental RMS current Ih1 on 1st harmonics including IpFnd phase p fundamental RMS current and ...

Page 10: ...ed power and plus sign indicate consumed power Inductive reactive character is marked with i and capacitive reactive character is marked with c See 5 1 5 and 5 1 6 for definition S S S Apparent power including Sp phase p apparent power and Stot total apparent power See 5 1 5 and 5 1 6 for definition Minus sign indicates apparent power during generation and plus sign indicate apparent power during ...

Page 11: ...UpihN phase p to neutral voltage nth RMS interharmonic component See 5 1 8 for definition UInt Minimal URms 1 2 voltage measured during interrupt occurrence UNom Nominal voltage normally a voltage by which network is designated or identified UPk Peak voltage including UpgPk phase p to phase g voltage and UpPk phase p to neutral voltage URms 1 2 RMS voltage refreshed each half cycle including UpgRm...

Page 12: ...Move cursor and select parameters 4 ENTER key Confirms new settings step into submenu 5 ESC key Exits any procedure exit from submenu 6 LIGHT key LCD backlight on off backlight automatically turns off after 15 minutes if no key action occurs If the LIGHT key is pressed for more then 1 5 seconds CONTRAST menu is displayed Contrast can be adjusted with the LEFT and RIGHT keys 7 ON OFF key Turns on o...

Page 13: ...ween voltage input terminals and ground is 1000 VRMS Figure 2 2 Top connector panel Top connector panel layout 1 Clamp on current transformers I1 I2 I3 IN input terminals 2 Voltage L1 L2 L3 N GND input terminals Figure 2 3 Side connector panel Side connector panel layout 1 External power socket 2 PS 2 RS 232 GPS serial connector 3 USB GPRS Connector 3 2 1 ...

Page 14: ...3 Serial number label 2 4 Accessories 2 4 1 Standard accessories Table 2 1 PowerQ4 Plus standard accessories Description Peaces Flexible current clamp 3000 A 300 A 30 A A 1227 4 Temperature probe A 1354 1 Test probe red 2 Test probe CAT II red 3 Test probe CAT II black 1 Crocodile clip red 3 Crocodile clip black 1 Crocodile clip green 1 Voltage measurement cable red 3 1 2 1 3 ...

Page 15: ...ion manual for PowerQ4 Plus Handbook Modern Power Quality Measurement Techniques 2 4 2 Optional accessories Table 2 2 PowerQ4 Plus optional accessories Ord code Description A 1020 Small soft carrying bag A 1033 Current clamp 1000 A 1 V A 1037 Current transformer 5 A 1 V A 1039 Connection cable for current clamp A 1069 Mini current clamp 100 A 1 V A 1122 Mini current clamp 5 A 1 V A 1179 3 phase fl...

Page 16: ...any procedure Function keys It s functions depends on active screen Cursor keys Move Zoom Scroll Enter Select procedure Press Hold for contrast adjustment Backlight On Off Indicate that supply adapter is connected to the instrument Battery status Animated icon indicate battery charging Static icon Indicate charge level GPS status Optional Current time and date GPRS status Optional Figure 3 1 Displ...

Page 17: ... this menu all instrument functions can be selected Figure 3 3 MAIN MENU Table 3 1 Instrument screen symbols and abbreviations Battery status Animated icon indicate battery charging Static icon Indicate charge level Indicate that charger is connected to the instrument GPS module status Optional accessory A 1355 GPS module detected but reporting invalid time and position data searching for satellit...

Page 18: ...ent main functions By pressing ENTER function user can select one of four menu subgroup of function Measurements set of basic measurement screens Recorder setup and view of various recording Measurement Setup parameterization of measurement parameters procedures General Setup configuring or checking of other instrument parameters List of all submenu are presented on following figure Figure 3 4 Mea...

Page 19: ...d current measurements are shown Descriptions of symbol and abbreviations used in this menu are shown in table bellow Table 3 3 Instrument screen symbols and abbreviations Show currently displayed channel Current recorder status RECORDER is active RECORDER is busy retrieving data from memory RECORDER is not active Current instrument time RMS True effective value URms and IRms THD Total harmonic di...

Page 20: ...t into memory Reset MAX and MIN values URms 1 2 and I Rms Show frequency trend available only during recording Show measurements for phase L1 Show measurements for phase L2 Show measurements for phase L3 Show measurements for neutral channel Summary of all phases measurements Show phase to phase voltages measurements Switch to METER view Switch to SCOPE view Switch to TREND view available only dur...

Page 21: ...NRms Upg p g 1 2 3 True effective value of phase to phase line voltage U12Rms U23Rms U31Rms Ip p 1 3 N True effective value of current I1Rms I2Rms I3Rms INRms Thd Total harmonic distortion for displayed quantity THDU or THDI f Frequency on reference channel Table 3 6 Keys functions Waveform snapshoot Hold measurement on display Save held measurement into memory Select which waveforms to show Show ...

Page 22: ...Select which waveform to zoom only in U I or U I Set vertical zoom Set horizontal zoom Exit from HOLD screen without saving Return to the MEASUREMENTS menu screen 3 2 3 Trend While RECORDER is active TREND view is available see section 3 9 for instructions how to start recorder Voltage and current trends Current and voltage trends can be observed by cycling function key F4 METER SCOPE TREND Figure...

Page 23: ...r last recorded time interval IP Ip p 1 3 N Maximal average and minimal value of current IpRms for last recorded time interval IP Current RECORDER time Days hours min sec Maximal and minimal recorded voltage Maximal and minimal recorded current Table 3 8 Keys functions Zoom in Zoom out Select between the following options Show voltage trend Show current trend Show voltage and current trend single ...

Page 24: ...requency trend screen Table 3 9 Instrument screen symbols and abbreviations Current recorder status RECORDER is active RECORDER is busy retrieving data from memory Current instrument time f Maximal average and minimal value of frequency at synchronization channel for last recorded time interval IP Current RECORDER time Days hours min sec Maximal and minimal frequency on displayed graph Table 3 10 ...

Page 25: ...tage and current signatures Figure 3 18 Power measurements summary Figure 3 19 Detailed Power measurements at phase L1 Description of symbols and abbreviations used in METER screens are shown in table bellow Table 3 11 Instrument screen symbols and abbreviations Show currently displayed channel Current recorder status RECORDER is active RECORDER is busy retrieving data from memory RECORDER is not ...

Page 26: ...ilable only during recording Exit from HOLD screen without saving Return to the MEASUREMENTS menu screen 3 3 2 Trend During active recording TREND view is available see section 3 9 for instructions how to start RECORDER Figure 3 20 Power trend screen Table 3 13 Instrument screen symbols and abbreviations Current recorder status RECORDER is active RECORDER is busy retrieving data from memory Show s...

Page 27: ... inductive power factor 1st quadrant PFi1 PFi2 PFi3 PFitot and 3rd quadrant PFi1 PFi2 PFi3 PFitot for last recorded time interval IP PFcp PFt p 1 3 Maximal average and minimal value of capacitive power factor 4th quadrant PFc1 PFc2 PFc3 PFctot and 2nd quadrant PFc1 PFc2 PFc3 PFctot for last recorded time interval IP Current RECORDER time Days hours min sec Maximal and minimal recorded quantity Tab...

Page 28: ...o start RECORDER In order to fully understand meanings of particular energy parameter see section 5 1 7 The meter screens are shown on figures bellow Figure 3 21 Energy counters screen Table 3 15 Instrument screen symbols and abbreviations Current recorder status RECORDER is active RECORDER is busy retrieving data from memory RECORDER is not active Current instrument time eP Consumed phase eP1 eP2...

Page 29: ...ergy registers for whole record Return to the MEASUREMENTS menu screen 3 5 Harmonics menu Harmonics presents voltage and current signals as a sum of sinusoids of power frequency and its integer multiples Power frequency is called fundamental frequency Sinusoidal wave with frequency k times higher than fundamental k is an integer is called harmonic wave and is denoted with amplitude and a phase shi...

Page 30: ... is not active Current instrument time RMS True effective value URms and IRms THD Total harmonic interharmonic distortion THDU and THDI hn n 0 50 n th harmonic interharmonic voltage Uhn or current Ihn component Table 3 18 Keys functions Waveform snapshoot Hold measurement on display Save held measurement into memory Press Hold Toggle harmonics interharmonics measurement view Represent harmonics in...

Page 31: ...nic interharmonic components Exit from HOLD screen without saving Return to the MEASUREMENTS menu screen 3 5 2 Histogram Bar Bar screen displays dual bar graphs The upper bar graph shows voltage harmonics and the lower bar graph shows current harmonics Figure 3 23 Harmonics histogram screens Description of symbols and abbreviations used in BAR screens are shown in table bellow Table 3 19 Instrumen...

Page 32: ...s interharmonics components for phase L2 Harmonics interharmonics components for phase L3 Harmonics interharmonics components for neutral channel Switch to METER view Switch to BAR view Switch to TREND view available only during recording Toggle cursor between voltage and current histogram Scale displayed histogram by amplitude Scroll cursor to select single harmonic interharmonic bar Exit from HO...

Page 33: ...average value of total current harmonic distortion THDI for selected phase Uh Uih Maximal and average value for selected n th voltage harmonic interharmonic component for selected phase Ih Iih Maximal and average value of selected n th current harmonic interharmonic component for selected phase Current RECORDER time Days hours min sec Maximal and minimal recorded quantity Table 3 22 Keys functions...

Page 34: ...cs interharmonics components for neutral channel UNhn Switch to METER view Switch to BAR view Switch to TREND view available only during recording Return to the MEASUREMENTS menu screen Selection of harmonics interharmonics for observing trend Max 3 harmonics interharmonics can be selected Press and hold F2 key in TREND screen and a spreadsheet for selection will open Note that only recorded harmo...

Page 35: ...EASUREMENTS menu the FLICKERMETER tabular screen is shown see figure below Figure 3 25 Flickermeter table screen Description of symbols and abbreviations used in METER screen is shown in table bellow Table 3 24 Instrument screen symbols and abbreviations Current recorder status RECORDER is active RECORDER is busy retrieving data from memory RECORDER is not active Current instrument time Urms True ...

Page 36: ...urrent recorder status RECORDER is active RECORDER is busy retrieving data from memory Current instrument time pstmp p 1 3 Maximal average and minimal value of 1 minute short term flicker Pst1min for phase voltages U1 U2 U3 or line voltages U12 U23 U31 pstp p 1 3 Maximal average and minimal value of 10 minutes short term flicker Pst for phase voltages U1 U2 U3 or line voltages U12 U23 U31 pltp p 1...

Page 37: ...and phase angles of the network This view is strongly recommended for checking instrument connection before measurement Note that most measurement issues arise from wrongly connected instrument see 4 1 for recommended measuring practice On phase diagram instrument shows Graphical presentation of voltage and current phase vectors of the measured system Unbalance of the measured system 3 7 1 Phase d...

Page 38: ...e held measurement into memory Selects voltage for scaling with cursors Selects current for scaling with cursors Switch to phase diagram Switch to symmetry diagram Switch to TREND view available only during recording Show details about the selected event Scale displayed diagram by amplitude Exit from HOLD screen without saving Back to the MEASUREMENTS menu 3 7 2 Symmetry diagram Symmetry diagram r...

Page 39: ...t ratio i symU symI Zero sequence voltage ratio u0 Zero sequence current ratio i0 Indicate current and voltage scaling Value represents current or voltage value at the top of the graph top horizontal line Table 3 31 Keys function Waveform snapshoot Hold measurement on display Save held measurement into memory Toggle u u0 voltages and select voltage for scaling with cursors Toggle i i0 currents and...

Page 40: ...ecorded time interval IP Isym Maximal average and minimal value of negative sequence current ratio i for last recorded time interval IP Isym0 Maximal average and minimal value of zero sequence current ratio i0 for last recorded time interval IP Current RECORDER time Days hours min sec Maximal and minimal recorded quantity Table 3 33 Keys functions Zoom in Zoom out Negative sequence voltage ratio v...

Page 41: ...n 4 2 4 3 8 1 Meter Figure 3 30 Temperature meter screen Table 3 34 Instrument screen symbols and abbreviations Current recorder status Instrument is recording Instrument is busy saving data to memory Instrument is not in recording mode Current instrument time Table 3 35 Keys function Switch to TREND view available only during recording Return to the MEASUREMENTS menu screen 3 8 2 Trend Temperatur...

Page 42: ...nt RECORDER time Days hours min sec Maximal and minimal temperature value on displayed graph Table 3 37 Keys functions Zoom in Zoom out Toggle temperature scale Celsius Fahrenheit degrees Switch to METER view Return to the MEASUREMENTS menu screen 3 9 General Recorder PowerQ4 Plus has ability to record measured data in the background In RECORDER menu user can customize recorder parameters in order...

Page 43: ...nimal average and maximal value will be recorded for each signal The smaller the interval is more measurements will be used for the same record duration Note The instrument automatically changes the duration in case there is not enough memory for the desired interval and duration Note EN 50160 record type stores only average values per interval Signals Select signals to record See 4 2 5 for detail...

Page 44: ...harmonic component for recording Memory type Select recorder memory type Linear normal recorder which start and stop in accordance to user settings Circular when recorded data exceeds free memory oldest data in the current recording will be overwritten with the newest Amount of recorded aggregation intervals is limited by free flash memory before recording start Duration Select the duration of the...

Page 45: ...d power or currents channels and perform EN 50160 and power measurement simultaneously Load the selected configuration active in configuration sub menu Save the changes to the selected configuration active in configuration sub menu Enter the selected submenu Select parameter change value Select parameter change value Back to the previous menu 3 10 Waveform recorder Waveform recording is a powerful...

Page 46: ... number of periods Store mode Store mode setup Single waveform recording ends after first trigger Continuous consecutive waveform recording until user stop the measurement or instrument runs out of storage memory Every consecutive waveform recording will be treated as a separate record Table 3 41 Keys functions Start waveform recorder Stop waveform recording Note If user forces waveform recorder t...

Page 47: ...apture screen Table 3 42 Instrument screen symbols and abbreviations Current instrument status Instrument is waiting for trigger to happen Instrument is recording beep indicates that trigger limit has been reached Instrument is busy saving data to memory Current instrument time Up p 1 3 N True effective value of phase voltage U1Rms U2Rms U3Rms UNRms Upg p g 1 2 3 True effective value of phase to p...

Page 48: ...Switch to SCOPE view Select which waveform to zoom only in U I or U I Set vertical zoom Set horizontal zoom Return to the WAVEFORM RECORDER setup screen 3 10 3 Captured waveform Captured waveform can be viewed from the Memory list menu Following views are available for the waveform record U I f meter table screen U I f scope screen U I f RMS trend screen Figure 3 35 Captured waveform meter screen ...

Page 49: ... L2 Show measurements for phase L3 Show measurements for neutral channel Summary of all phases measurements Show phase to phase voltages measurements Switch to METER view Switch to SCOPE view Switch to TREND view available only during recording Return to the WAVEFORM RECORDER setup screen Figure 3 36 Captured waveform scope screen Table 3 46 Instrument screen symbols and abbreviations SCOPE Curren...

Page 50: ...n single graph Show voltage and current waveform in two separate graph Show measurement for phase L1 Show measurement for phase L2 Show measurement for phase L3 Show measurement for neutral channel Summary of all phases measurements Show phase to phase voltages measurements Switch to RMS TREND view Select which waveform to zoom vertically only in U I or U I graphs Set vertical zoom Move cursor pos...

Page 51: ... Zoom in Zoom out Select between the following signals Show voltage waveform Show current waveform Select between phase neutral all phases and view Show trend for phase L1 Show trend for phase L2 Show trend for phase L3 Show trend for neutral channel Summary of all phases trends Switch to tabular METER view Toggle cursor assignment between waveform scope and RMS trend Set vertical zoom Only if cur...

Page 52: ...reen is shown see figure below Figure 3 38 Inrush recorder setup screen Table 3 50 Instrument screen symbols and abbreviations Interval Logging interval setup from 10 ms to 200 ms Signals Select logging signals Trigger Trigger set up Current input for trigger source Trigger level at which inrush logging will start Trigger slope direction FALL RISE BOTH Duration Total logging time in seconds Pretri...

Page 53: ... Interval is selected change interval period If Signals dialog is open scroll through all channels If Trigger dialog is open scroll through trigger sources change trigger level change trigger slope Open SIGNALS dialog box if Signals is selected In this dialog box the individual signals can be selected for logging Open TRIGGER dialog box if Trigger is selected In this dialog box the trigger channel...

Page 54: ...etween phases Show graph and parameters for phase L1 Show graph and parameters for phase L2 Show graph and parameters for phase L3 Show graph and parameters for neutral channel Return to the RECORDERS menu screen 3 11 3 Captured inrush Captured inrush can be viewed from the Memory list menu The recorded signal trace can be scrolled through and reviewed with a cursor Data are displayed in graphical...

Page 55: ...voltage value on graph Date and time at the current cursor position Time relative to the trigger event occurrence Table 3 55 Keys function Zoom in Zoom out Toggle between voltage and current channel Show Urms 1 2 voltage trend graph Show I Rms current trend graph Show voltage Urms 1 2 and current I Rms trend in single graph Show voltage Urms 1 2 and current I Rms trend in two separate graphs Selec...

Page 56: ... in transient recorder is based on sample value 3 12 1 Setup Figure 3 41 Transients setup screen Table 3 56 Instrument screen symbols and abbreviations Trigger dV Trigger value Trigger type Trigger type set up Manual trigger user can manually generate a trigger event dV voltage rate of change that triggers transients recorder Store buffer Number of signal periods to be recorded Pretrigger buffer N...

Page 57: ...n or MEMORY LIST screen 3 12 2 Capturing transients Figure 3 42 Transients capture screen Table 3 58 Instrument screen symbols and abbreviations Current instrument status Instrument is waiting for trigger to happen Instrument is recording beep indicates that trigger limit has been reached Instrument is busy saving data to memory Current instrument time Up p 1 3 N True effective value of phase volt...

Page 58: ...ine view Show waveforms for phase L1 Show waveforms for phase L2 Show waveforms for phase L3 Show waveforms for neutral channel Summary of all phases waveforms Show phase to phase voltages Select which waveform to zoom only in U I or U I Set vertical zoom Set horizontal zoom Return to the TRANSIENTS SETUP screen 3 12 3 Captured transients Captured transients records can be viewed from the Memory l...

Page 59: ...pe screen Voltage scale and the top bottom of the scope screen Table 3 61 Keys function Zoom in Zoom out Select between the following signals Show voltage waveform Show current waveform Show voltage and current waveform in single graph Show voltage and current waveform in two separate graphs Select between single phase neutral and all phases waveform graphs Select between phase neutral all phases ...

Page 60: ...ion of phase to phase voltage THDU12 THDU23 THDU31 f Frequency on reference channel Time at cursor position Time scale at beginning and the end of the scope screen Voltage scale and the top bottom of the scope screen Table 3 63 Keys function Zoom in Zoom out Select between the following signals Show voltage waveform Show current waveform Select between phase neutral all phases and view Show transi...

Page 61: ...oup view In this view voltage event are grouped according to IEC 61000 4 30 see section 5 1 12 for details Table where events are summarized is shown bellow Each line in table represents one event described by event number event start time and duration and level Additionally in colon T event characteristics are shown see table bellow for details Figure 3 45 Voltage events in group view screen By p...

Page 62: ... on voltage U31 Note this indication is shown only in event details since one grouped event can have many phase events Start Event start time when first URms 1 2 value cross threshold T Indicates type of event or transition D Dip I Interrupt S Swell N D Transition from normal state to dip N S Transition from normal state to swell D I Transition from dip to interrupt Level Minimal or maximal value ...

Page 63: ...r event start time duration and level Additionally in colon T type of event is shown see table bellow for details Figure 3 47 Voltage events screens You can also see details of each individual voltage event and statistics of all events Statistics show count registers for each individual event type by phase Table 3 66 Instrument screen symbols and abbreviations Current recorder status RECORDER is a...

Page 64: ...mal value in event UDip UInt USwell Duration Event duration Table 3 67 Keys function Group view is shown Press to switch on PHASE view Phase view is shown Press to switch on GROUP view Filter events by type Show all events Show dips only Show interrupts only Show swells only Filter events by phase Show only events on phase 1 Show only events on phase 2 Show only events on phase 3 Show all events S...

Page 65: ...3 for alarm setup and 5 1 13 for alarm measurement details Figure 3 48 Alarms list screen Table 3 68 Instrument screen symbols and abbreviations Current recorder status RECORDER is active RECORDER is busy retrieving data from memory RECORDER is not active Date Date when selected alarm has occurred Start Selected alarm start time when first URms value cross threshold L Indicate phase or phase to ph...

Page 66: ...ignalling alarms Filter alarms according to phase on which they occurred Show only alarms on phase 1 Show only alarms on phase 2 Show only alarms on phase 3 Show only alarms on neutral channel Show only alarms on chanels which are not channel dependent Show all alarms Show active alarm list List includes alarms which has started but not finished yet Notation used in this table is same as described...

Page 67: ... which can be one of following inrush logging waveform snapshoot transient recording waveform recording general recording Signals Number of recorded signals Start Record start time End Record stop time Size kB Record size in kilobytes kB Saved records Total number of records in memory Table 3 71 Keys functions VIEW View details of currently selected record CLEAR Clear the last record In order to c...

Page 68: ...pe RECORD Indicator that record type is made by GENERAL RECORDER Interval 1s Show interval used for GENERAL RECORDER Signals 173 max min avg Show number of signals in record Memory type Linear Show how memory is organized Duration 00h 05m 12s Show duration of record Include active events 4 Show number of captured events Include active alarms 0 Show number of captured alarms Start time Show record ...

Page 69: ...n symbols and abbreviations Show record number in MEMORY LIST Current instrument time Indicate position of the cursor at the graph Up Upg Maximal average and minimal recorded value of phase voltage UpRms or line voltage UpgRms for time interval selected by cursor Ip Maximal average and minimal recorded value of current IpRms for time interval selected by cursor Time position of cursor regarding to...

Page 70: ...nds Show frequency trend Select which waveform to zoom only in U I or U I trends Scroll the cursor along logged data Return to the CHANNELS SETUP menu screen Note Other recorded data power harmonics etc has similar manipulation principle as described in table above 3 15 2 Waveform snapshoot This type of record can be made by using Hold Save procedure Its front page is similar to the screen where i...

Page 71: ...type of record is made by Transient recorder For details regarding manipulation and data observing see section 3 12 3 3 16 Measurement Setup menu From the MEASUREMENT SETUP menu measurement parameters can be reviewed configured and saved Figure 3 53 MEASUREMENT SETUP menu Table 3 76 Description of setup options Connection setup Setup measurement parameters Event setup Setup event parameters Alarm ...

Page 72: ...Use this factor if external voltage transformers or dividers should be taken into account All readings are then related to the primary voltage See 4 2 2 for connection details Note scale factor can be set only when the lowest Voltage range is selected Note Maximum value is limited to 4000 Ph Curr Clamps Select phase clamps for phase current measurements Note For Smart clamps A 1227 A 1281 always s...

Page 73: ...surement is performed on that channel Depending on Connection user can select 1W U1 or I1 3W U12 or I1 4W U1 I1 System frequency Select system frequency 50 Hz 60 Hz Default parameters Set factory default These are Nominal range 110 240V L N Voltage ratio 1 1 Phase current clamps Smart Clamps Neutral current clamps Smart Clamps Connection 4W Synchronization U1 System frequency 50 Hz Table 3 79 Keys...

Page 74: ...le event capturing Note Enable events only if you want to capture it without recording In case you want observe events only during recording use option Include active events On in GENERAL RECORDER menu Note In case of Connection type 1W it is recommended to connect unused voltage inputs to N voltage input in order to avoid false triggering Table 3 81 Keys function Change value Select Voltage event...

Page 75: ...r non phase measurements frequency unbalance 3rd column on figure above Select triggering method trigger when measured quantity is lower than threshold FALL trigger when measured quantity is higher than threshold RISE 4th column Threshold value 5th column Minimal alarm duration Trigger only if threshold is crossed for a defined period of time Note It is recommended that for flicker measurement rec...

Page 76: ... power line carrier systems 20kHz 148 5kHz mains mark system User can define two different signalling frequencies Signals can be used as a source for the user defined alarm and can also be included in recording See section 3 16 3 to learn how to set up alarms See section 3 7 3 for instructions how to start recording Figure 3 57 Signalling setup screen Table 3 84 Keys functions Change frequency val...

Page 77: ...ct language Clear Memory Clear instrument memories Instrument info Information about the instrument Lock Unlock Lock instrument to prevent unauthorized access Table 3 86 Keys functions Select function from the GENERAL SETUP menu Enter the selected item Back to the MAIN MENU screen 3 17 1 Communication Communication port RS232 USB or GPRS and communication speed can be set in this menu Figure 3 59 ...

Page 78: ...sername provided by mobile operator Password APN password provided by mobile operator APN Access point name Unique identifier that allows connection to the network provided by mobile operator Settings needed for GPRS communication are shown in section 4 2 6 optional accessory A 1356 For further information refer to A 1356 GPRS Modem User manual Table 3 88 Keys functions INIT Initialize GPRS modem ...

Page 79: ... or year Change value of the selected item Return to the GENERAL SETUP menu screen Note PowerQ4 Plus has the ability to synchronize its system time clock with Coordinated Universal Time UTC time provided by externally connected GPS module In that case only hours time zone can be adjusted In order to use this functionality see 4 2 5 3 17 3 Language Different languages can be selected in this menu F...

Page 80: ... Use this menu in order to clear different instrument memory User can select one of following items to clear Figure 3 62 Clear menu screen Table 3 91 Description of Clear menu options Events Clear Voltage EVENTS table Alarms Clear ALARMS table Records Clear all stored records Table 3 92 Keys functions Select option to clear Confirm to clear Back to the GENERAL SETUP menu screen ...

Page 81: ...rtant instrument functionality by simply locking the instrument There are several reasons for instrument locking especially if instrument is left for a longer period at an unsupervised measurement spot Some reasons are prevention of unintentional stopping of record changing of instrument or measurement setup etc Although instrument lock prevent unauthorized changing of instrument working mode it d...

Page 82: ...functionality blocked RECORDERS No access MEASUREMENT SETUP No access GENERAL SETUP No access except to Lock Unlock menu A warning message appears if user tries to enter restricted instrument functions By pressing ENTER during the warning message appearance the LOCK UNLOCK screen will be entered where the instrument can be unlocked by entering the previously entered lock code Figure 3 65 Locked in...

Page 83: ...ly once it is very important to properly set measuring equipment Measuring with wrong setting can lead to false or useless measurement results Therefore instrument and user should be fully prepared before measurement begins In this section recommended recorder procedure is shown We recommend to strictly follow guidelines in order to avoid common problems and measurement mistakes Figure bellow shor...

Page 84: ... voltage currents load type Optionally enable events or alarms and define parameter thresholds Double check Measurement setup using Phase diagram and various scope and metering screens Using power metering check if power is flowing in right direction power should be positive for load and negative for generator measurements Nominal voltage Thresholds Step 2 4 Optional Define alarm and its parameter...

Page 85: ...d voltage tips to the Device under measurement See section 4 2 for details Select proper type of connection in Connection setup menu See section 3 16 1 for details Select synchronization channel Synchronization to voltage is recommended unless measurement is performed on highly distorted loads such as PWM drives In that case current synchronization can be more appropriate See section 3 16 1 for de...

Page 86: ...ent has right direction Using U I f menu check if voltage and current value has proper value Additionally check voltage and current THD Note Excessive THD can indicate that too small range was chosen Note In case of AD converter overloading current and voltage value will be displayed with inverted color 250 4 V Note If phase current or voltage value are not within 10 150 of the range their values ...

Page 87: ...werView v2 0 manual for details 4 2 Connection setup 4 2 1 Connection to the LV Power Systems This instrument can be connected to the 3 phase and single phase network The actual connection scheme has to be defined in CONNECTION SETUP menu see Figure below Figure 4 2 Connection setup menu When connecting the instrument it is essential that both current and voltage connections are correct In particu...

Page 88: ...ollowing connection on the instrument Figure 4 3 Choosing 3 phase 4 wire system on instrument Instrument should be connected to the network according to figure bellow LN L3C B A L1 L1 L3C N A L2 L2 B Figure 4 4 3 phase 4 wire system 3 phase 3 wire system In order to select this connection scheme choose following connection on the instrument ...

Page 89: ...instrument Instrument should be connected to the network according to figure bellow LN L3C B A L1 L1 L3C N A L2 L2 B Figure 4 6 3 phase 3 wire system 1 phase 3 wire system In order to select this connection scheme choose following connection on the instrument Figure 4 7 Choosing 1 phase 3 wire system on instrument ...

Page 90: ...t 4 2 2 Connection to the MV or HV Power System In systems where voltage is measured at the secondary side of a voltage transformer say 11 kV 110 V the instrument voltage range should be set to 50 110 V and scaling factor of that voltage transformer ratio has to be entered in order to ensure correct measurement In the next figure settings for this particular example is shown Figure 4 9 Voltage rat...

Page 91: ... on current transformer In this type of measurement load generator current is measured directly with one of clap on current transformer Current to voltage conversion is performed directly by the clamps Direct current measurement can be performed by any clamp on current transformer We particularly recommend Smart clamps flex clamps A 1227 and iron clamps A 1281 Also older Metrel clamp models A 1033...

Page 92: ...ume that we measure only third part of current Note During setup current range can be observed by Current range 100 3000 A row Indirect current measurement Indirect current measurement with primary current transducer is assumed if user selects 5A current clamps A 1122 or A 1037 Load current is that case measured indirectly through additional primary current transformer In example if we have 100A o...

Page 93: ...d are usually over dimensioned for possibility to add new loads in future In that case current in primary transformer can be less than 10 of rated transformer current For such cases it is recommended to select 10 current range as shown on figure bellow Figure 4 13 Selecting 10 of current clamps range Note that if we want to perform direct current measure with 5 A clamps primary transformer ratio s...

Page 94: ...l be automatically recognized by the instrument 6 User should then select clamp range and confirm settings Figure 4 14 Automatically recognised clamps setup Instrument will remember clamps setting for the next time Therefore user only need to 1 Plug clamps into the instrument 2 Turn on the instrument Instrument will recognize clamps automatically and set up ranges as was settled on measurement bef...

Page 95: ...ged out of the instrument 4 2 4 Temperature probe connection Temperature measurement is performed using smart temperature probe connected to the neutral current input channel IN In order to activate smart clamp recognition following procedure should be followed for the first time 1 Turn on instrument 2 Connect temperature probe into PowerQ4 Plus neutral current input 3 Enter Measurement setup Conn...

Page 96: ...selected as the primary communication port Once this is done GPS module can be attached to the PS 2 communication port PowerQ4 Plus distinguishes two different states regarding GPS module functionality Table 4 2 GPS functionality GPS module detected position not valid or no satellite GPS signal reception GPS module detected satellite GPS signal reception date and time valid and synchronized synchr...

Page 97: ...ow show COMMUNICATION menu in GENERAL SETUP Figure 4 19 GPRS connection setup screen Following parameters should be entered in order to establish GPRS communication Table 4 4 GPRS setup parameters Number Required Enter phone number PIN Optional Enter this parameter if it if your SIM card request If you don t disable PIN code on your SIM card put SIM Card into you mobile phone and disable it Secret...

Page 98: ...Connection type Value 1W 3W 4W RMS U1rms UNrms U12rms U23rms U31rms U1rms U2rms U3rms UNrms U12rms U23rms U31rms THD THDU1 THDUN THDU12 THDU23 THDU31 THDU1 THDU2 THDU3 THDUN THDU12 THDU23 THDU31 Cf CfU1 CfUN CfU12 CfU23 CfU31 CfU1 CfU2 CfU3 CfUN CfU12 CfU23 CfU31 RMS I1rms INrms I1rms I2rms I3rms I1rms I2rms I3rms INrms THD THDI1 THDIN THDI1 THDI2 THDI3 THDI1 THDI2 THDI3 THDIN Cf CfI1 CfIN CfI1 Cf...

Page 99: ...ih1 50 U31ih1 50 U1ih1 50 U2ih1 50 U3ih1 50 UNih1 50 Harmonics and interharmonics Iih1 50 I1ih1 50 INih1 50 I1ih1 50 I2ih1 50 I3ih1 50 I1ih1 50 I2ih1 50 I3ih1 50 INih1 50 Note Frequency measurement depends on synchronization reference channel which can be voltage or current In the same manner recording quantities are related to connection type too When user selects Signals in RECORDER menu channel...

Page 100: ... eP tot eP tot eP eQ i eQ1 c eQ1 i eQ1 c eQ1 i tot eQ c tot eQ i tot eQ c tot eQ i eQ1 c eQ1 i eQ2 c eQ2 i eQ3 c eQ3 i tot eQ c tot eQ i eQ1 c eQ1 i eQ2 c eQ2 i eQ3 c eQ3 i tot eQ c tot eQ Energy eS 1 eS 1 eS tot eS tot eS 1 eS 1 eS 2 eS 2 eS 3 eS 3 eS tot eS tot eS Pf i PF1 c PF1 i PF1 c PF1 i tot PF c tot PF i tot PF c tot PF i PF1 c PF1 i PF2 c PF2 i PF3 c PF3 i tot PF c tot PF i PF1 c PF1 i PF...

Page 101: ...ent is resynchronized on each Interval tick according to the IEC 61000 4 30 Class S Measurement methods are based on the digital sampling of the input signals synchronised to the fundamental frequency Each input 4 voltages and 4 currents is simultaneously sampled 1024 times in 10 cycles 5 1 2 Voltage measurement magnitude of supply voltage Standard compliance IEC 61000 4 30 Class S Section 5 2 All...

Page 102: ...1 2 3 N 5 Phase current crest factor Ip Ip Ipcr max p 1 2 3 N 6 The instrument has internally two current ranges 10 and 100 range of nominal transducer current Additionally Smart current clamps models offer few measuring ranges and automatic detection 5 1 4 Frequency measurement Standard compliance IEC 61000 4 30 Class S Section 5 1 During RECORDING with aggregation time Interval 10 sec frequency ...

Page 103: ...iguous and non overlapping Phase active power 1024 1 1024 1 1024 1 1024 1 j j p j p j j p p I U p P W p 1 2 3 7 Apparent and reactive power power factor and displacement power factor Cos φ are calculated according to the following equations Phase apparent power p p p I U S VA p 1 2 3 8 Phase reactive power 2 2 p p p p P S Q Sign Q VAr p 1 2 3 9 Sign of reactive power 0 0 0 0 180 0 1 180 0 1 p p p ...

Page 104: ...ER is active After power off on procedure and before start of recording all counters are cleared Instrument use 4 quadrant measurement technique which use two active energy counters eP eP and two reactive eQ eQ as shown on bellow L e a d L a g L e a d L a g Figure 5 3 Energy counters and quadrant relationship Instrument has 3 different counters sets 1 Total counters TOT EN are intended for measuri...

Page 105: ...equation describes relation between input signal and its frequency presentation FFT Voltage harmonics and THD 10 periods t n 1 2 3 4 5 6 50 U FFT 10 periods t n 1 2 3 4 5 6 50 I Uhn Ihn Current harmonics and THD Figure 5 4 Current and voltage harmonics k k k t f k c c t u 1 512 1 0 2 10 sin 17 f1 frequency of signal fundamental in example 50 Hz c0 DC component k ordinal number order of the spectra...

Page 106: ...RMS value of the subgroup associated with the fundamental Total voltage harmonic distortion 2 40 2 1 n p n p p U h U h U THD p 1 2 3 20 Total current harmonic distortion 2 40 2 1 n p n p Ip h I h I THD p 1 2 3 21 Spectral component between two harmonic subgroups are used for interharmonics assessment Voltage and current interharmonic subgroup of n th order is calculated using RSS root sum square p...

Page 107: ...g results are aggregated additionally on a 3s intervals Those values are used for confronting with limits defined in standard 5 1 10 Flicker Standard compliance IEC 61000 4 30 Class S Section 5 3 IEC 61000 4 15 Flicker is a visual sensation caused by unsteadiness of a light The level of the sensation depends on the frequency and magnitude of the lighting change and on the observer Change of a ligh...

Page 108: ...long term flicker is calculated according to the following equation 3 1 3 N Pst P N i i ltp p 1 2 3 24 5 1 11 Voltage and current unbalance Standard compliance IEC 61000 4 30 Class A Section 5 7 1 The supply voltage unbalance is evaluated using the method of symmetrical components In addition to the positive sequence component U under unbalanced conditions there also exists negative sequence compo...

Page 109: ...00 4 30 Class S Section 5 4 2 The dip threshold is a percentage of Nominal voltage defined in EVENT SETUP menu The dip threshold can be set by the user according to the use Instrument event evaluation depends on Connection type On single phase systems a voltage dip begins when the URms 1 2 voltage falls below the dip threshold and ends when the URms 1 2 voltage is equal to or above the dip thresho...

Page 110: ...URms 1 2 voltage rises above the swell threshold and ends when the URms voltage is equal to or bellow the swell threshold plus the 2 of hysteresis voltage see Figure 5 8 on three phase systems two different evaluation techniques can be used for evaluation simultaneously o A swell begins when the URms 1 2 voltage of one or more channels is above the swell threshold and ends when the URms 1 2 voltag...

Page 111: ...a voltage interruption begins when the URms 1 2 voltages of all channels fall below the voltage interruption threshold and ends when the URms 1 2 voltage on any one channel is equal to or greater than the voltage interruption threshold plus the hysteresis o a voltage interrupt begins when the URms 1 2 voltage of one channel fall below the interrupt threshold and ends when the URms 1 2 voltage is e...

Page 112: ...gnatures Date Date when selected alarm has occurred Start Alarm start time when first value cross threshold Phase Phase on which alarm occurred Level Minimal or maximal value in alarm Duration Alarm duration 5 1 14 Data aggregation in GENERAL RECORDING Standard compliance IEC 61000 4 30 Class S Section 4 5 3 Time aggregation period IP during recording is defined with parameter Interval x min in RE...

Page 113: ... quantity average over given aggregation interval A 10 cycle quantity value N number of 10 cycles measurements per aggregation interval 28 Arithmetic average N j j avg A N A 1 1 Where Aavg quantity average over given aggregation interval A 10 cycle quantity value N number of 10 cycles measurements per aggregation interval 29 In the next table averaging method for each quantity is specified Table 5...

Page 114: ...160 recording with minimum and maximum values use general type of recording and later convert it into EN50160 type of record by using Powerview v2 0 software An active average value is calculated upon the same principle arithmetic or RMS as average value but taking in account just measurements with active attribute set RMS active average N M A M A M j j RMSact 1 1 2 30 Where ARMSact quantity avera...

Page 115: ... quantities 140 values per interval Power Energy 16 quantities 64 values per interval 12 quantities 48 values per interval 60 quantities 240 values per interval Flicker 3 quantities 12 values per interval 9 quantities 36 values per interval 9 quantities 36 values per interval Symmetry 2 quantities 8 values per interval 4 quantities 16 values per interva Harmonics 202 quantities 800 303 quantities ...

Page 116: ...asurement campaign PowerQ4 Plus has the ability to take waveform snapshot This is particularly useful for storing temporary characteristics or network behavior Snapshot stores all network signatures and samples of 10 cycles Using MEMORY LIST function see 3 10 or with PowerView v2 0 software user can observe stored data 5 1 16 Waveform record Waveform record is consisted of a configurable number of...

Page 117: ...d function is similar to waveform recorder it stores a selectable set of pre and post trigger samples on trigger activation with 10 times higher sampling rate Recorder use envelope triggering Trigger is activated if difference between two consecutive periods of input voltage signals is greater than given limit Transient recorder stores one cycle of mains signal Figure 5 11 Transients trigger detec...

Page 118: ... buffer measured values before trigger point and post buffer measured values after trigger point Triggering Input I1 I2 I3 IN U1 U2 U3 UN trigger channels Level predefined TRMS value Slope rise fall both Slope rise t t Slope fall Pre buffer 0 to Total buffer 1 Pre buffer is treated as negative time Total buffer Start logging Stop logging Trigger point pre buff post buff Pre buffer and post buffer ...

Page 119: ... average situation usually experienced by an individual network user An overview of EN 50160 limits are presented on table bellow Table 5 5 EN 50160 standard overview Supply voltage phenomenon Acceptable limits Meas Interval Monitoring Period Acceptance Percentage Power frequency 49 5 50 5 Hz 47 0 52 0 Hz 10 s 1 Week 99 5 100 230V 10 95 Supply voltage variations UNom 230V 10 15 10 min 1 Week 100 F...

Page 120: ... less than one second 5 2 5 Long interruptions of the supply voltage Under normal operating conditions the annual frequency of accidental voltage interruptions longer than three minutes may be less than 10 or up to 50 depending on the area 5 2 6 Supply voltage unbalance Under normal operating conditions during each period of one week 95 of the 10 min mean RMS values of the negative phase sequence ...

Page 121: ...Mains Signalling voltage level limits according to EN50160 5 2 10 Flicker severity Under normal operating conditions in any period of one week the long term flicker severity caused by voltage fluctuation should be Plt 1 for 95 of the time 5 2 11 PowerQ4 Plus recorder setting for EN 50160 survey PowerQ4 Plus is able to perform EN 50160 surveys on all values described in previous sections In order t...

Page 122: ...eration 122 Figure 5 15 Predefined EN50160 recorder configuration After recording is finished EN 50160 survey is performed on PowerView v2 0 software See PowerView v2 0 manual or details Note In EN 50160 recording only average values are stored ...

Page 123: ...g batteries Battery charging time 4 hours USB 1 0 Standard USB Type B 2400 baud 921600 baud Communication RS232 8 pin PS 2 type 2400 baud 115200 baud The charging time and the operating hours are given for batteries with a nominal capacity of 2500mAh 6 2 Measurements Note In order to get resolution and accuracy specified in this section measuring data should be observed by PowerView v2 0 Waveform ...

Page 124: ...rement and logging period Unconnected voltage clips are susceptible to EMI and can trigger false events It is advisable to short them with instrument neutral voltage input 6 2 2 Phase Voltages UpRms p 1 2 3 4 N Measuring range Resolution Accuracy Crest factor Range 1 20 00 VRMS 150 00 VRMS 10 mV Range 2 50 0 VRMS 360 0 VRMS Range 3 200 0 VRMS 1500 0 VRMS 100 mV 0 2 URMS min 1 5 UpRms 1 2 p 1 2 3 4...

Page 125: ... 20 0 V 442 0 Vpk Range 2 47 0 V 884 0 Vpk Range 3 346 0 V 3700 0 Vpk 100 mV 0 5 UPk 6 2 4 Current Input impedance 100 kΩ IpRms p 1 2 3 4 N AC DC Measuring range Resolution Accuracy Crest factor Range 1 50 0 mVRMS 200 0 mVRMS 0 25 URMS min 1 5 Range 2 50 0 mVRMS 2 0000 VRMS 100 V 0 25 URMS URMS RMS voltage measured on current input Peak value IpPk INPk p 1 2 3 4 N AC DC Measuring range Resolution ...

Page 126: ...t e m U n c e 6 2 5 Frequency Measuring range Resolution Accuracy 10 000 Hz 70 000 Hz 2 mHz 10 mHz 6 2 6 Flickermeter Fl Type Measuring range Resolution Accuracy Plt1min 0 400 4 000 5 Plt1min Pst 0 400 4 000 5 Pst Plt 0 400 4 000 0 001 5 Plt Guaranteed only in 49 Hz 51 Hz frequency range 6 2 7 Power Measuring range W VAr VA Resolution Accuracy Excluding clamps 0 000 k 999 9 M 0 5 P With A 1227 Fle...

Page 127: ...y Measuring range kWh kVArh kVAh Resolution Accuracy Excluding clamps 000 000 000 001 999 999 999 999 0 5 eP With A 1227 Flex clamps 000 000 000 001 999 999 999 999 1 8 eP With A 1281 Multirange clamps 100 000 000 000 001 999 999 999 999 0 8 eP Active energy eP With A 1033 1000 A 000 000 000 001 999 999 999 999 12 digits 1 6 eP Excluding clamps 000 000 000 001 999 999 999 999 0 5 eQ With A 1227 Fl...

Page 128: ...minal voltage RMS 6 2 12 Current harmonics and THD Measuring range Resolution Accuracy IhN 10 INom 10 mV 0 15 INom 10 INom IhN 100 10 mV 5 IhN INom Nominal current RMS IhN measured harmonic current N harmonic component 1st 50th Measuring range Resolution Accuracy 0 INom THDI 100 INom 0 1 0 6 100 INom THDI 200 INom 0 1 1 5 INom Nominal current RMS 6 2 13 Voltage interharmonics Measuring range Resol...

Page 129: ...esolution Accuracy u u0 0 5 5 0 0 1 0 15 u 0 i i0 0 0 17 0 1 1 i 0 6 2 17 Time and duration uncertainty Real time clock RTC uncertainty Operating range Accuracy 20 C 70 C 3 5 ppm 0 3 s day 0 C 40 C 2 0 ppm 0 17 s day Event duration and recorder time stamp and uncertainty Measuring Range Resolution Error Event Duration 30 ms 7 days 1 ms 1 cycle 6 2 18 Temperature Measuring range Resolution Accuracy...

Page 130: ...tored into record Trigger Start time or manual 6 3 2 Waveform recorder Sampling 102 4 samples per cycle period continuous sampling per channel All channels are sampled simultaneously Sampling frequency is continuously synchronized with mains frequency Recording time From 10 cycle period to 3770 cycle periods Recording type Single waveform recording ends after first trigger Continuous consecutive w...

Page 131: ...es per cycle All channels are sampled simultaneously Recording time From 1 47 cycle period Recording quantities Waveform samples of U1 U2 U3 UN U12 U23 U31 I1 I2 I3 IN Calculated for all channels URMS IRMS THDU THDI Trigger Manual dV for detail see section 5 1 17 6 4 Standards compliance 6 4 1 Compliance to the IEC 61557 12 General and essential characteristic Power quality assessment function S S...

Page 132: ... 0 2 20 V 1000 V S Pst Plt 5 0 4 4 S Udip Uswl 1 5 V 1500 V S Uint 0 5 0 V 100 V A u u0 0 2 0 5 17 A Uhn 1 0 20 UNom S THDu 1 0 20 UNom S Ihn 1 0 100 INom A THDi 2 0 100 INom A 1 Measurement range depends on current sensor However according to the IEC 61557 12 if current sensor has INom defined as INom k A V then measurement range is 2 INom 200 INom ...

Page 133: ...lass II 0 20 UNom 0 20 UNom RMS 5 9 Voltage Interharmonics UihN S 5 9 1 IEC 61000 4 7 Class II 0 20 UNom 0 20 UNom RMS 5 10 Mains signalling voltage USig S 5 10 2 5 USig 3 15 UNom 0 20 UNom RMS A 6 3 Magnitude of the current IRms S A 6 3 1 0 5 2 200 INom 2 200 INom RMS A 6 4 Inrush current I Rms S A 6 4 1 1 2 200 INom A 6 5 Harmonic currents Ihn A A 6 5 IEC 61000 4 7 Class II 0 200 INom 0 200 INom...

Page 134: ...could be discharged or damaged Figure 7 1 Battery placement 3 Turn the display side of the instrument lower than the battery holder see figure below and put the cover on the batteries Figure 7 2 Closing the battery holder 4 Screw the cover on the instrument If the instrument is not going to be used for a long period of time remove all batteries from the battery holder The enclosed batteries can su...

Page 135: ...r period Unpredictable chemical processes can occur during charging new batteries or batteries that were unused for a longer period of time more than 3 months NiMH and NiCd batteries are affected to a various degree sometimes called as memory effect As a result the instrument operation time can be significantly reduced at the initial charging discharging cycles Therefore it is recommended To compl...

Page 136: ...ever the power supply adapter charger is connected to the instrument Inbuilt protection circuit controls the charging procedure and assure maximal battery lifetime If the instrument is left without batteries and charger for more than 2 minutes time and date settings are reset 7 4 Cleaning To clean the surface of the instrument use a soft cloth slightly moistened with soapy water or alcohol Then le...

Page 137: ...MI 2792 PowerQ4 Plus Maintenance 137 Manufacturer address METREL d d Ljubljanska 77 SI 1354 Horjul Slovenia Tel 386 1 75 58 200 Fax 386 1 75 49 095 Email metrel metrel si http www metrel si ...

Page 138: ...MI 2792 PowerQ4 Plus Maintenance 138 ...

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METREL MI 2792 PowerQ4 Plus, Instruction Manual

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