HT VEGA78 User Manual
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HT VEGA78 User Manual

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 Copyright HT ITALIA 2017
Release EN 1.06 - 02/05/2017

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Summary of Contents for HT VEGA78

  • Page 1 PowerMeterStore 1.888.610.7664 www. .com Shop for Power Metering products online at:  Copyright HT ITALIA 2017 Release EN 1.06 - 02/05/2017...

  • Page 2: Table Of Contents

    VEGA78 Table of contents: PRECAUTIONS AND SAFETY MEASURES ............. 4     1.1.  General ..........................4  1.2.  Preliminary instructions ......................4  1.3.  During use ..........................5  1.4.  After use ..........................5  GENERAL DESCRIPTION ..................6     2.1.  Introduction ........................... 6 ...
  • Page 3 VEGA78     5.4.11. During a recording ........................55 5.5.  Saved data management section ..................56      5.5.1. Recording analysis (Reg type) ....................57     5.5.1.1. Recording information ........................57     5.5.1.2. Recording graph ..........................58  ...
  • Page 4 VEGA78 10.5.  Measuring method: outlines ..................101      10.5.1. Integration period ........................101     10.5.2. Power factor calculations ......................101 AFTER-SALE SERVICE ..................102     11.1.  Warranty ........................102  11.2.  Service .......................... 102  PowerMeterStore 1.888.610.7664 www. .com...

  • Page 5: Precautions And Safety Measures

    VEGA78 1. PRECAUTIONS AND SAFETY MEASURES 1.1. GENERAL This meter has been designed in compliance to IEC/EN61010-1 directive. For your own safety and to avoid damaging the instrument we suggest you follow the procedures hereby prescribed and to read carefully all the notes preceded by the symbol Before and during measurements please take care of below points: ...

  • Page 6: During Use

    VEGA78 1.3. DURING USE Please read carefully the below points: CAUTION Should you fail to keep to the prescribed instructions you could damage the instrument and/or its components or endanger your safety.  Do not touch any unused terminal when the meter is connected to the circuit on test.

  • Page 7: General Description

    2.1. INTRODUCTION The VEGA78 meter permits a completely new approach to the world of electrical measures on network quality. In fact the computer assisted instruments along with Windows CE technology permit an easy and widely fast analysis of a huge quantity of data, which would be impossible with any other system.

  • Page 8: Prepare To Use

    VEGA78 3. PREPARE TO USE 3.1. INITIAL CHECK This meter has been checked before shipment from an electrical and mechanical point of view. All possible precautions have been taken in order to deliver it in perfect condition. Notwithstanding, on receipt of the instrument we suggest that you check it summarily to make sure that no damage has occurred in transit.

  • Page 9: How To Operate

    VEGA78 4. HOW TO OPERATE 4.1. INSTRUMENT DESCRIPTION CAPTION: 1. Voltage and Current inputs 2. TFT display with “touchscreen” 3. F1 – F4 keys 4. Arrows keys and ENTER key 5. GO/STOP key 6. SAVE key 7. ON/OFF key 8. Input for external adapter 9.

  • Page 10: Keyboard Description

    VEGA78 4.2. KEYBOARD DESCRIPTION The below keys are available:  Key ON/OFF: Press this key to turn on the meter. Press and hold the key for few seconds to turn off the meter.  Keys F1, F2, F3, F4: Multifunction keys. The various functions are intended from the s shown on the bottom of display.

  • Page 11: Display Description

    VEGA78 4.3. DISPLAY DESCRIPTION The display is a graphic TFT colour type, 73x57mm sizes (VGA 320x240 pxls) with “touch- screen” which permits a really easy operations using standard PT400 pointer pen fitted in lateral side of meter. On first display’s row the system date/hour is shown by meter (see § 5.1.2 for settings). There are also some icons relative to battery level indication or external adapter fitted and for waiting and start of a recording.

  • Page 12: General Menu

    VEGA78 5. GENERAL MENU Whenever you turn on the meter, the below “Analyzer Configuration” screen is shown, relative to the last configuration used (see Fig. 6): Fig. 6: Example of analyzer configuration In this situation the user can decide whether modify the actual configuration by pressing F1 key (or “CHANGE”...

  • Page 13: General Settings

    VEGA78 5.1. GENERAL SETTINGS Fig. 8: MENU GENERAL screen - General settings section This section permits to set the below control parameters:  System language.  System Date/Hour.  Display brightness.  Protection password during recordings.  Key sound on pressure.

  • Page 14: Date/Time Settings

    VEGA78 5.1.2. Date/Time settings 1. Press the F1 key (or touch DATE at display) on screen of Fig. 9. The below screen is shown by meter: Fig. 10: Date/Time settings screen 2. Move the cursor using arrows keys on field relative to “Date format” and “Time format”, marked with blue background.

  • Page 15: Display Brightness Adjust

    VEGA78 5.1.3. Display brightness adjust 1. Move the cursor using arrows keys on the field relative to “Brightness”, marked with blue background Fig. 11: Adjust brightness screen 2. Using F3 or F4 keys (alternatively touch MOD(+) o MOD(-)) for adjustment of display brightness percentage.

  • Page 16: Sound Keys Setting

    VEGA78 3. With Password enabled, should GO/STOP key be pressed during a recording, the meter will not stop the operation but will require the user to insert password as shown in the below screen: Fig. 13: Insert Password screen 4. The fixed password (not changeable by user) to insert on meter within 10s from...

  • Page 17: Auto Power Off Setting

    VEGA78 5.1.6. Auto power off setting The meter permits to enable or disable the auto power off option in order to prevent a quick discharge of internal battery. This feature, if selected, is active under each of the following conditions: ...

  • Page 18: Memory Type Setting

    VEGA78 5.1.7. Memory type setting The meter permits saving of recordings both in its internal memory (about 15Mbytes) and by using an external compact flash (see § 5.5.4 for details) fitted (see Fig. 3). For the selection of memory type follow the below steps: 1.

  • Page 19: Real Time Values

    VEGA78 5.2. REAL TIME VALUES Fig. 18: MENU GENERAL screen - Real time values section In this section the real time measured values of parameters both on input channels and internally calculated are shown by meter. In particular are shown the AC TRMS voltages,...
  • Page 20 VEGA78 PARAMETERS CAPTION:  Total Active Power Pact  Total Reactive Power Preact  Total Apparent Power Papp  Total Power Factor  Total Power factor considering fundamental CosPhi  of voltage and current signals Fig. 20: Page of total power values PARAMETERS CAPTION: ...
  • Page 21 VEGA78 PARAMETERS CAPTION: Eact Total active energy consumed when starting recording. Ppeak  Maximum peak of consumed active power. Date Ppeak  Date and time in which the peak occurred. Start rec.  Date when recording was started. Stop rec.  Date when recording was stopped.

  • Page 22: Scope Waveforms Screens

    VEGA78 5.2.2. SCOPE waveforms screens Starting from a any page of numerical values it’s possible to select waveforms screens of the input signals by pressing F2 key (or touch SCOPE at display). By pressing cyclically F1 key the below screens are shown by meter.
  • Page 23 VEGA78 Fig. 30: Voltage/Current waveforms screen L2 phase for 4-wire systems  Waveforms of signals on L3 phase, with their TRMS values, as below shown: Fig. 31: Voltage/Current waveforms screen L3 phase for 4-wire systems In Manual mode inside Advanced Settings (see § 5.3.2.1) a customisation of full scale of voltage and current graphic is possible in order to improve the resolution on readings.

  • Page 24: Harm Analysis Screens

    VEGA78 5.2.3. HARM analysis screens Starting from any page of numerical values it’s possible to enter harmonics numerical values and histogram graphics screens section for voltage and current input signals by pressing F2 key (or touch HARM at display). By pressing cyclically F1 key the below screens are shown by meter.
  • Page 25 VEGA78 Fig. 34: Harmonic analysis voltages in percentage value for 4-wire systems Fig. 35: Harmonic analysis currents in percentage value for 4-wire systems Press F3 key to back to graphical screens and F2 key to change voltages’ or currents’ screens. Press F4 key or the up and down arrows (or touch the “HARM PAG” at display) to show the screens relative to other harmonics orders up to 64 ...

  • Page 26: Vectorial Diagrams Screens

    VEGA78 Fig. 37: Harmonic analysis of current I1 in percentage/absolute values for 4-wire system 5.2.4. Vectorial diagrams screens Starting from a any page of numerical values it’s possible to select the vectorial diagrams screens of voltage and currents by pressing F4 key (or touch “VECTORS” at display). The aim of this feature is to show, with numerical and graphical indications, the phase angles, expressed in degree [°] between the three voltages V1, V2 and V3 and the currents I1, I2...
  • Page 27 VEGA78  The vectorial diagram of voltage and current for each phase depending on the type of system as shown in below screens: Fig. 40: Vectorial current diagram for 4-wire system Fig. 41: Vectorial voltage/current diagram L1 phase for 4-wire system...

  • Page 28: Analyzer Settings

    VEGA78 5.3. ANALYZER SETTINGS Fig. 42: Analyzer settings screen Inside this section the meter permits to perform basic and advanced selections relative to the type of electrical installation under test. In particular it is possible to  Select the type of system, the frequency, the kind of current clamp, the full scale of...
  • Page 29 VEGA78 Fig. 43: Analyzer configuration screen for 4-wire system – ENG type Fig. 44: Analyzer configuration screen for 4-wire system – ENG_UK type Fig. 45: Analyzer Configuration screen for 3-wire system – ENG type Fig. 46: Analyzer Configuration screen for 3-wire system – ENG_UK type PowerMeterStore 1.888.610.7664...
  • Page 30 VEGA78 Fig. 47: Analyzer Configuration screen for ARON system – ENG type Fig. 48: Analyzer Configuration screen for ARON system – ENG_UK type Fig. 49: Analyzer Configuration screen for Single phase system – ENG type Fig. 50: Analyzer Configuration screen for Single phase system – ENG_UK type PowerMeterStore 1.888.610.7664...
  • Page 31 VEGA78 Fig. 51: Analyzer Configuration screen for Two phase system 3-wire 1Ph3W – ENG type Fig. 52: Analyzer Configuration screen for 2-phase system 3-wire 1Ph3W – ENG_UK type Fig. 53: Analyzer Configuration screen for Two phase system 3-wire 3P 2E – ENG type Fig.
  • Page 32 VEGA78 Fig. 55: Analyzer Configuration screen for Three phase system 3-wire 3P OD – ENG type Fig. 56: Analyzer Configuration screen for 3-phase system 3-wire 3P OD – ENG_UK type Fig. 57: Analyzer Configuration screen for Three phase system 4-wire 3P HL – ENG type Fig.

  • Page 33: Setting System Frequency

    VEGA78 Fig. 59: Analyzer Configuration screen for Two phase system 3-wire 3P OY – ENG type Fig. 60: Analyzer Configuration screen for 2-phase system 3-wire 3P OY – ENG_UK type 1. Move the cursor using arrows keys on field relative to “System”, marked with blue background.

  • Page 34: Setting Clamp Type

    VEGA78 5.3.1.2. Setting clamp type This parameter must be always set equal to the clamp type used. Two types of clamps are available:  STD: For Standard clamps or Current Transformer.  FLEX: For Flexible clamps 1. Move the cursor using arrows keys on field relative to “Clamp Type”, marked with blue background.

  • Page 35: Zoom Graphics Option

    VEGA78 Fig. 61: Advanced Settings screen In the above screen is possible to select advanced options which have effect in Real Time values screens of meter. 5.3.2.1. Zoom graphics option This option permits to select a customized full scale on each phase of voltage and current waveforms (see Fig.

  • Page 36: Harmonics Values Option

    VEGA78 5.3.2.3. Harmonics values option This option permits to select the value of harmonics which can be shown inside Real Time values’ section. 1. Move the cursor using arrows keys on field relative to “Harm. values” , marked it with blue background.

  • Page 37: Average Value Option

    VEGA78 5.3.2.5. Average value option This option, available for 4-wire systems only, permits to display the arithmetic average of TRMS values of:  Phase voltages V1, V2, V3.  Phase currents I1, I2, I3.  Active power on each phase P1, P2, P3.

  • Page 38: Recording Settings

    VEGA78 5.4. RECORDING SETTINGS Fig. 62: Recording Settings screen selection In this section the meter permits to define any detail relative to start and stop of recordings, perform parameters selection for recording, the type of analysis to be carried out very easily thanks to “touch screen”...

  • Page 39: Comments

    VEGA78 The bottom bar of display included the below functions, relative to F1, F2, F3, F4 keys:  CLP/EXP: Used to collapse or expand the sub-levels.  PREDEF.: Used to open the typical configuration section (see § 5.4.9).  SEL: Used to select or disable parameters inside various levels.

  • Page 40: Start And Stop

    VEGA78 5.4.3. Start and Stop These items permits to define the method to enable and disable the recordings with meter (see § 5.4.10). The possible options are:  Manu: Each recording is enabled/disabled in MANUAL mode by pressing GO/STOP key.

  • Page 41: General Parameters

    VEGA78 5.4.6. General Parameters This option permits the selection of network parameters for recording operation. This level included several sub-level for a detailed selection depending on the type of system on test (see § 5.3.1). Depending on the selection performed, different error screen can be shown by meter.
  • Page 42 VEGA78 Fig. 67: General Parameters section: too many selected parameters In the above screen (see Fig. 67) the harmonics' selection brought about too many selected parameters (more than 251). Not select some parameters to quit this situation. CAUTION The choose of a electrical for recording often increase the number of selected parameters more than one unit only.

  • Page 43: General Parameters: Sub-Levels Description

    VEGA78 5.4.6.1. General Parameters: sub-levels description Press F1 key (or touch CLP/EXP at display) to expand or compress the sub-levels. The parameters inside sub-levels are strictly depending on type of selected system (see § 5.3.1). As an example, below are shown the screens relative to a three phase 4-wire system.

  • Page 44: Harmonics: Sub-Levels Description

    VEGA78 5.4.6.2. Harmonics: sub-levels description Press F1 key (alternatively touch CLP/EXP at display) to expand or compress the harmonics sub-levels. The parameters inside sub-levels are strictly depending on type of selected system (see § 5.3.1). Below there are some pictures of different possible situations: Fig.

  • Page 45: Voltage Anomalies

    VEGA78 The selection parameters of harmonic analysis require the preliminary selection of voltages or currents inside General Parameter sub-level. The below error screen are shown in these cases: Fig. 71: No selected currents error screen To solve the error (see Fig. 71) situation of above screen select the “Current” inside “General Parameter”...

  • Page 46: Unbalance

    VEGA78 Press F4 key (alternatively touch MODIFYat display) for setting the below voltage anomalies parameters:  Reference nominal voltage Vref depending on the type of considered system. In particular Vref = VP-N (Single phase and three phase 4-wire systems), Vref = VP-P (three phase 3-wire and ARON systems) ...

  • Page 47: Predefined Configurations

    VEGA78 5.4.9. Predefined configurations In order to make the recording start easier the meter includes 5 selectable predefined configurations which describe typical situation in electrical installations, besides a “Default” configuration which defines the initial settings from the factory. The meter also permits to define up to 14 free configuration which can be customized, saved and recalled by user at any time.
  • Page 48 VEGA78 To add a predefined customized configuration press the F1 key (or the ADD at display). The warning message “Add actual configuration” is shown by meter. Press “Ok” to confirm and activate automatically the virtual keyboard (see § 5.4.2.1) where it’s possible to define and save the configuration name by user.
  • Page 49 VEGA78 VOLTAGE ANOMALIES GENERAL MENU PARAMETER SETTINGS SYSTEM System Freq[Hz] Analyzer Settings Clamp Type FS Clamp[A] VT Ratio Not modified Each system Zoom Graphics Harm. Type Analyzer Settings - Advanced Harm. Values Zoom 1st Harm. Average Values Comments VOLTAGE ANOMALIES...
  • Page 50 VEGA78 HARMONICS GENERAL MENU PARAMETER SETTINGS SYSTEM System Freq[Hz] Analyzer Settings Clamp Type FS Clamp[A] VT Ratio Not modified Each system Zoom Graphics Harm. Type Analyzer Settings - Advanced Harm. Values Zoom 1st Harm. Average Values Comments HARMONICS Start Not modified...
  • Page 51 VEGA78 POWER & ENERGY GENERAL MENU PARAMETER SETTINGS SYSTEM System Freq[Hz] Analyzer Settings Clamp Type FS Clamp[A] VT Ratio Not modified Each system Zoom Graphics Harm. Type Analyzer Settings Harm. Values Advanced Zoom 1st Harm. Average Values Comments POWER & ENERGY...
  • Page 52 VEGA78 DEFAULT CONFIGURATION GENERAL MENU PARAMETER SETTINGS System 4-wire Freq[Hz] Analyzer Settings Clamp Type FLEX FS Clamp[A] 3000 VT Ratio Zoom Graphics AUTO Harm. Type Analyzer Settings Harm. Values ABSOLUTES Advanced Zoom 1st Harm. Average Values Comments DEFAULT Start Manu...

  • Page 53: Start A Recording

    VEGA78 5.4.10. Start a recording The meter is designed to start a recording in MANUAL or AUTOMATIC mode (see § 5.4.3) by pressing of GO/STOP key. A recording operation can be started exclusively under the following screens:  MENU GENERAL (with any selected icon).
  • Page 54 VEGA78 CAUTION For recordings ALWAYS use the external power supply even though the instrument allows the operator to perform a recording using internal batteries. After starting a recording a preliminary real time evaluation about the situation on electrical installation it’s important in order to perform a correct settings, using the predefined configurations (see §...

  • Page 55: Automatic Start Of Recording

    VEGA78 Depending on the type and number of errors, the necessary modifications of setting parameters should be performed. Press GO/STOP key again to start recording and verify the possible residual error on window message. Confirm with ENTER or press “Ok” or “Cancel” keys to close the warning window message and start the recording by pressing GO/STOP key anyway.

  • Page 56: During A Recording

    VEGA78 5.4.11. During a recording After a recording is running, a real time check of parameters’s values and internal status is shown by meter. Fig. 84: Recording Results screen - Recording running 1. Select “Recording Results” in GENERAL MENU. 2. Pressing ENTER or touch the correspondent icon at display. The screen is shown: Fig.

  • Page 57: Saved Data Management Section

    VEGA78 5.5. SAVED DATA MANAGEMENT SECTION Fig. 86: GENERAL MENU - Saved Data Management The “Saved Data Management” section allows the user to check the content of the internal memory after recording, to delete previous recordings and possibly to copy a recording (one at a time) on an external USB Pen Driver connected to the instrument.

  • Page 58: Recording Analysis (Reg Type)

    VEGA78 5.5.1. Recording analysis (Reg type) This page shows the analyses which can be performed on the saved data (Reg type). Fig. 88: Recording analysis (Reg-type data) 1. Use the up and down arrow keys to highlight on blue background one of the analyses on the screen.

  • Page 59: Recording Graph

    VEGA78 5.5.1.2. Recording graph By selecting the recording graph option, the following page is accessed, which enables the user to display the recording trend (ONLY ONE parameter at a time). Fig. 90: Selecting a parameter 1. Press the F1 key (or the PARAM item on the display) to access the page containing the recorded quantities available for the analysis (Fig.
  • Page 60 VEGA78 This page shows the graph, the cursor position (cursor T) and the maximum, minimum and average RMS values of the parameter selected by the cursor. Fig. 92: Recording graph The following keys are active on this page:  F1 key (or PARAM item on the display) to access the page of the selectable parameters (Fig.

  • Page 61: Dips Ans Swells

    VEGA78 Example of advanced graph. Let us take a recording of 2000 pixels into consideration. The PQA has a display with a useful resolution of about 200 pixels; therefore, it is not able to distinctly display all the pixels in our recording. How does it operate then? The first pixel in the graphs of the curves “Max value”, “Average value”...
  • Page 62 VEGA78 This page shows the parameters set before recording voltage anomalies: Fig. 95: Voltage Anomalies The following non-modifiable parameters are indicated (as they have been set upon starting the recording). Nominal Voltage: Nominal voltage. High Voltage: Limit high voltage. Low Voltage: Limit low voltage.

  • Page 63: Analysis Of Consumed Energy

    VEGA78 5.5.1.4. Analysis of consumed energy This page shows the Energy and Peak power values consumed while recording Fig. 96: Screen of total consumed energy Description of the displayed values: Eact: Total active power consumed while Recording. Ppeak: Max. active power peak (measured on 16 periods of mains frequency)

  • Page 64: Analysis Of Producted Energy

    VEGA78 5.5.1.5. Analysis of producted energy This page shows the Energy and Peak power values producted while recording Fig. 97: Screen of total producted energy Description of the displayed values: Eact: Total active power produced while Recording. Ppeak: Max. active power peak (measured on 16 periods of mains frequency)

  • Page 65: Recording Analysis (Istant Type)

    VEGA78 5.5.2. Recording analysis (Istant type) This page shows the analyses which can be performed on the saved data (Istant type). Fig. 98: Recording analysis (Istant-type data) 1. Use the up and down arrow keys to highlight on blue background one of the analyses on the screen.

  • Page 66: Graph

    VEGA78 5.5.2.2. Graph This screen (Fig. 100) contemporarily shows the saved instant values of the waveforms of voltages V1, V2, V3, Vn scaled according to the Full scale (Fs) and the relevant RMS values; these values have been saved by the instrument upon pressing the SAVE key.

  • Page 67: Vectors

    VEGA78  In the upper half plane of the graph if the harmonics are introduced into the relevant electrical system from the mains.  In the lower half plane of the graph if the harmonics are injected into the relevant electrical system from the mains.

  • Page 68: Measures

    VEGA78 5.5.2.5. Measures As an example, below are shown the screens relative to a three phase 4-wire system. Similar consideration can be applied to any other selected system. In measure mode, the instrument displays the saved values in TRMS as shown in the following figures: In this page, the following symbols are used: V1N ...

  • Page 69: Transfer Recordings To A External Pen Driver Usb

    VEGA78 5.5.3. Transfer recordings to a external Pen Driver USB The meter permits to transfer of one or more saved recordings which are shown in Fig. 87 to a external Pen Driver USB directly connected to it (see Fig. 3). The below picture is shown by meter: Fig.

  • Page 70: Saving Recordings To External Compact Flash

    VEGA78 5.5.4. Saving recordings to external Compact Flash The instrument permits to save the recordings also on external standard compact flash which are fitted on suitable input (see Fig. 3) after activating “EXTERNAL” option on Memory type (see § 5.1.7). The following is shown by meter: Fig.

  • Page 71: Meter Information

    METER INFORMATION Inside this section the general internal parameters of meter are available as information from the user for example during any contact with Service people of HT ITALIA. Fig. 109: Menu General screen – Meter information section Press ENTER key or touch the correspondent icon at display. The below screen is shown by meter: Fig.

  • Page 72: Connection Of Meter To Pc (With Win Xp)

    5. Run TopView software and click on “Instrument <-> PC connection” key. Press the “Select new instrument” key in software screen in order to acknowledge the name of connected meter, which is shown in the bottom status bar. Select “VEGA78” model from the available list of meters only for the first connection.

  • Page 73: Measuring Procedures

    VEGA78 7. MEASURING PROCEDURES 7.1. USING OF METER IN A SINGLE PHASE SYSTEM – ENG TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 74: Using Of Meter In A Single Phase System - Eng_Uk Type

    VEGA78 7.2. USING OF METER IN A SINGLE PHASE SYSTEM – ENG_UK TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 75: Using Of Meter In A 3-Phase 4 Wire System - Eng Type

    VEGA78 7.3. USING OF METER IN A 3-PHASE 4 WIRE SYSTEM – ENG TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 76: Using Of Meter In A 3-Phase 4 Wire System - Eng_Uk Type

    VEGA78 7.4. USING OF METER IN A 3-PHASE 4 WIRE SYSTEM – ENG_UK TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 77: Using Of Meter In A Three Phase 3 Wire System - Eng Type

    VEGA78 7.5. USING OF METER IN A THREE PHASE 3 WIRE SYSTEM – ENG TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 78: Using Of Meter In A Three Phase 3 Wire System - Eng_Uk Type

    VEGA78 7.6. USING OF METER IN A THREE PHASE 3 WIRE SYSTEM – ENG_UK TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 79: Using Of Meter In A Three Phase 3 Wire Aron System - Eng Type

    VEGA78 7.7. USING OF METER IN A THREE PHASE 3 WIRE ARON SYSTEM – ENG TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 80: Using Of Meter In A 3-Phase 3 Wire Aron System - Eng_Uk Type

    VEGA78 7.8. USING OF METER IN A 3-PHASE 3 WIRE ARON SYSTEM – ENG_UK TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 81: Using Of Meter In A 3-Phase 4-Wire 3P Hl (Usa System) - Eng Type

    VEGA78 7.9. USING OF METER IN A 3-PHASE 4-WIRE 3P HL (USA SYSTEM) – ENG TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 82: Using In A 3-Phase 4-Wire 3Phl (Usa System) - Eng_Uk Type

    VEGA78 7.10. USING IN A 3-PHASE 4-WIRE 3PHL (USA SYSTEM) – ENG_UK TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 83: Using Of Meter In A 3-Phase 3-Wire 3Pod (Usa System) - Eng Type

    VEGA78 7.11. USING OF METER IN A 3-PHASE 3-WIRE 3POD (USA SYSTEM) – ENG TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 84: Using Of Meter In 3-Phase 3-Wire 3Pod (Usa System) - Eng_Uk Type

    VEGA78 7.12. USING OF METER IN 3-PHASE 3-WIRE 3POD (USA SYSTEM) – ENG_UK TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 85: Using Of Meter In A 3 Wire 3P 2E (Usa System) - Eng Type

    VEGA78 7.13. USING OF METER IN A 3 WIRE 3P 2E (USA SYSTEM) – ENG TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 86: Using Of Meter In A 3 Wire 3P 2E (Usa System) - Eng_Uk Type

    VEGA78 7.14. USING OF METER IN A 3 WIRE 3P 2E (USA SYSTEM) – ENG_UK TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 87: Using Of Meter In A 3 Wire 3P Oy (Usa System) - Eng Type

    VEGA78 7.15. USING OF METER IN A 3 WIRE 3P OY (USA SYSTEM) – ENG TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 88: Using Of Meter In A 3 Wire 3P Oy (Usa System) - Eng_Uk Type

    VEGA78 7.16. USING OF METER IN A 3 WIRE 3P OY (USA SYSTEM) – ENG_UK TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 89: Using Of Meter In A 3 Wire 1Ph3W (Usa System) - Eng Type

    VEGA78 7.17. USING OF METER IN A 3 WIRE 1PH3W (USA SYSTEM) – ENG TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 90: Using Of Meter In A 3 Wire 1Ph3W (Usa System) - Eng_Uk Type

    VEGA78 7.18. USING OF METER IN A 3 WIRE 1PH3W (USA SYSTEM) – ENG_UK TYPE CAUTION The maximum voltage among B1, B2, B3, B4 and BE inputs is 1000V / CAT IV 600V to ground. Do not measure voltages exceeding the limits prescribed by this manual.

  • Page 91: Maintenance

    8.1. GENERAL The VEGA78 is a precision meter. For their use and storage, follow the recommendations and instructions of this manual in order to avoid possible damages or dangers. Never use the instrument in environments with a high humidity or temperature. Do not expose the meter to direct sunlight.

  • Page 92: Technical Specifications

    VEGA78 9. TECHNICAL SPECIFICATIONS 9.1. TECHNICAL FEATURES TRMS AC/DC Voltage Phase-Neutral / Phase-Ground – Single phase / Three phase systems Range Accuracy Resolution Input impedance 0.0  600.0V (0.5%rdg+2dgt) 0.1V 10M Max crest factor = 2 Voltage values < 2.0V are considered zero by meter Meter is connectable with external VT with ratio selectable from 1 ...
  • Page 93 VEGA78 Power – Single phase / Three phase systems (@ Cos>0.5 and Vmis>60V, clamp type STD) Parameter Full Scale Range Resolution Accuracy [W, VAr, VA] Clamp (FS) [W, VAr, VA] [W, VAr, VA] 0.0  999.9 FS  1A 0.001k 1.000 ...

  • Page 94: General Features

    VEGA78 9.2. GENERAL FEATURES Real time values General network parameters: Voltages, Currents, Powers, Cos Unbalance, THD%, Harmonics Signals waveforms: Voltages, Currents, harmonics histograms Vectorial diagrams: Voltages, Currents Recordings Parameters: Each general parameters + energies Number of selectable parameter: Max 251...

  • Page 95: Appendix - Theoretical Outlines

    VEGA78 APPENDIX – THEORETICAL OUTLINES 10.1. VOLTAGE ANOMALIES The meter is capable of recording all those TRMS values as voltage anomalies, calculated every 10ms, beyond the percentage thresholds of Voltage Reference (Vref) set during the programming from ±1% to ±30% with steps of 1%. These limits remain unchanged throughout the recording period.

  • Page 96: Limit Values For Harmonic Voltage

    VEGA78 LEGEND: 1. Fundamental 2. Third Harmonic 3. Distorted Waveform Effect of the sum of 2 multiple frequencies The EN50160 standard recommends to stop the index in the expression (1) corresponding to the 40 harmonic. A fundamental element to detect the presence of harmonics is THD defined as: ...

  • Page 97: Presence Of Harmonics: Causes

    VEGA78 10.2.3. Presence of harmonics: causes Any apparatus that alters the sine wave or uses only a part of such a wave causes distortions to the sine wave and therefore harmonics. All current signals result in some way virtually distorted. The most common situation is the harmonic distortion caused by no-linear loads such as electric household appliances, personal computers or speed control units for motors.

  • Page 98: Supply Voltage Unbalance

    VEGA78 10.3. SUPPLY VOLTAGE UNBALANCE In normal conditions the supply voltage and the final loads are perfectly balanced. Unbalances are possible in trouble situations (low insulation) and/or phase circuits interruptions. Moreover, in single phase systems, the balance can be only statistic.

  • Page 99: Power And Power Factor: Definitions

    VEGA78 10.4. POWER AND POWER FACTOR: DEFINITIONS In a standard electrical installation powered by three sine voltages the following are to be defined:     cos( Phase Active Power: (n=1,2,3) actn   Phase Apparent Power: (n=1,2,3) appn ...

  • Page 100: Conventions On Powers And Power Factors

    VEGA78 Note: It shall be noted that the expression of the phase Reactive Power with no sine waveforms, would be wrong. To understand this, it may be useful to consider that both the presence of harmonics and the presence of reactive power produce, among other effects, an increase of line power losses due to the increased current RMS value.

  • Page 101: Three Phase 3 Wire Aron System

    VEGA78 Value Description The active power (positive or negative) is defined in the panel and therefore acquires the value Pact of the active power in that moment. The reactive power (inductive or capacitive, positive or negative) is defined in the panel and Preact therefore acquires the value of the reactive power in that moment.
  • Page 102 VEGA78 10.5. MEASURING METHOD: OUTLINES The meter is capable of measuring: voltages, currents, active powers, inductive and capacitive reactive powers, apparent powers, inductive and capacitive power factors, energies, analogical or pulse parameters. All these parameters are analysed in a digital way for each phase (voltage and current) and calculated based on formulas of the previous sections.
  • Page 103 VEGA78 AFTER-SALE SERVICE 11.1. WARRANTY This instrument is guaranteed against any defects in material and manufacturing, in compliance with the general sale terms and conditions. During the warranty period all defective parts may be replaced, but the manufacturer reserves the right to repair or replace the product.

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