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Topics of this presentation…. What is power quality? In what ways does power quality degrade and what are the consequences? How to setup and operate power quality analyzer to diagnose problems. How to setup software to perform analysis of data recorded by analyzer.

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Topics of this presentation

Topics of this presentation…

  • What is power quality?

  • In what ways does power quality degrade and what are the consequences?

  • How to setup and operate power quality analyzer to diagnose problems.

  • How to setup software to perform analysis of data recorded by analyzer.

  • What power quality devices does Amprobe offer?

PQ Training, page 1


What is power quality

What is Power Quality?

  • Deals with safe and efficient delivery of “good quality” electrical power to loads.

  • Good quality power can be described as:

    • Voltage waveform is undistorted and of specified amplitude and frequency.

    • Sufficient power to drive all of the connected loads.

    • Delivered without interruptions.

    • All carried power can be utilized to do work.

PQ Training, page 2


Good power turning bad

Good power turning bad…

PQ Training, page 3


A few words on safety

A few words on safety

  • To avoid electrical shock or fire, check safety instructions in the User’s Manual.

  • All measurements should be performed by a licensed electrician.

PQ Training, page 4


Safety standards iec 61010 low voltage overvoltage protection 1000v

Distribution level wiring and permanently installed loads.

Circuit level and plug-in loads.

Power lines at utility connection, outdoors wiring possibly affected by lightning.

Certifying agencies and standards.

Safety StandardsIEC 61010 – low-voltage overvoltage protection (<1000V)

CAT rating indicates the level of protection against voltage transients.

Protected electronic circuits.

Voltage rating refers to nominal voltage of an environment (1000V, 600V, 300V…).

PQ Training, page 5


Overview of steps in using amprobe analyzer to troubleshoot power quality problems

Overview of steps in using Amprobe analyzer to troubleshoot power quality problems

  • Setup of the analyzer.

  • Connect analyzer to electrical installation.

  • Use meter mode to diagnose the problem or, if problem is intermittent, continue on.

  • Record data.

  • Download data from recorder to computer.

  • Analyze data on computer.

Please note, the following instructions are specific to DM-III Multitest. For other devices, please refer to appropriate User’s Manual.

PQ Training, page 6


Analyzer setup 1 one time initial setup

MENU

MENU

ENTER

ENTER

F1/F2 to scroll down/up

F1/F2 to scroll left/right,

F3/F4 to change values

Analyzer setup, 1One-time initial setup.

  • Verify date and time are correct.

Labels corresponding to soft-buttons F1-F4.

(These will differ for other screens)

PQ Training, page 7


Analyzer setup 2 phase configuration and frequency

Analyzer setup, 2Phase configuration and frequency

  • Set parameters of diagnosed electrical system.

    SYSTEM: 3PH4W

    FREQUENCY: 60Hz

  • Set proper current clamp range and type (CT).

    CURR RANGE: 1000A

    CLAMP TYPE: STD

  • Set Transformer Voltage (TV Ratio).

    TV RATIO: 0001

MENU

MENU

ENTER

ENTER

F1/F2 to scroll down/up

F1/F2 to scroll down/up,

F3/F4 to change values

PQ Training, page 8


Analyzer setup 3 clamp types

AM-FLEX33

ACF-3000

DM-CT-HTA

DM-CT-100

ANALYZER CONFIG

ANALYZER CONFIG

ANALYZER CONFIG

ANALYZER CONFIG

CURR RANGE: 1000A

CURR RANGE: 100A

CURR RANGE: 3000A

CURR RANGE: 3000A

CLAMP TYPE: STD

CLAMP TYPE: STD

CLAMP TYPE: FlexEXT

CLAMP TYPE: FlexINT

Analyzer setup, 3Clamp types

  • In ‘Analyzer Config’ set up appropriate current range and clamp type.

PQ Training, page 9


Connecting analyzer to electrical installation

Connecting analyzer to electrical installation

  • Make sure:

    • Rotary switch is in “Power Quality” position.

    • Current transducers are properly aligned (otherwise, in a power-consuming system, working power (P) readings will be negative).

    • For recordings, device is plugged into external power supply and batteries are fully charged.

PQ Training, page 10


Connecting analyzer to electrical installation 1 phase 2 wire system

ANALYZER CONFIG

SYSTEM: SINGLE

Connecting analyzer to electrical installation1-phase, 2-wire system

PQ Training, page 11


Connecting analyzer to electrical installation 3 phase 3 wire delta system

ANALYZER CONFIG

SYSTEM: 3P3W

Connecting analyzer to electrical installation 3-phase, 3-wire (delta) system

PQ Training, page 12


Connecting analyzer to electrical installation 3 phase 4 wire wye system

ANALYZER CONFIG

SYSTEM: 3P4W

Connecting analyzer to electrical installation 3-phase, 4-wire (wye) system

PQ Training, page 13


Using meter mode to diagnose a problem

Using meter mode to diagnose a problem

  • Meter mode allows you to view a snapshot of the system.

  • Easily diagnose power factor, harmonics and other problems.

  • If problem is intermittent, verify that voltage and current probes are properly connected by looking at voltage and current screens.

F4

F4

F4

F4

F4

F4

F4

F4

F3

F3

F3

F3

F3

F3

F3

F3

F1

F1

F2

F2

ESC

ESC

ESC

ESC

PQ Training, page 14


Recording data setup 1

MENU

ENTER

ENTER

Recording data setup, 1

  • Start/Stop fields indicate whether manual or scheduled recording start/stop will occur.

    • You will still need to press START button to activate scheduled recording.

  • Integration period indicates how often the instrument will save acquired data. During each integration period instrument will continuously monitor input and at the end it will store:

    • Minimum, maximum and average values for RMS voltages, currents, powers and power factors.

    • Average value for voltage and current harmonics.

  • The options are 5s, 10s, 30s, 1min, 2min, 5min, 10min, 15min, 30min, 60min. The maximum recording time length depends on integration period and set of parameters chosen.

  • HARM REC indicates if harmonics will be recorded. Individual harmonics can be selected in later screens.

  • ANOM REC indicates if voltage anomalies will be recorded. The reference voltage and limits can be specified in the next screen.

  • PQ Training, page 15


    Recording data setup 2

    ENTER

    ENTER

    ENTER

    ENTER

    ENTER

    HARM: Pg

    HARM: Pg

    F3

    F3

    F3

    F3

    Recording data setup, 2

    • Choose voltages and currents to be recorded by positioning cursor over parameter and pressing +/- soft-key.

    • If voltage anomalies were enabled, select reference voltage and upper and lower limits for surges/sags.

    • Reference voltage is set phase-to-neutral for all systems with exception of 3-phase, 3-wire for which it is set phase-to-phase.

    • Note: the maximum number of parameters that can be recorded simultaneously is 63. You will receive an error message if you try to start recording with more parameters.

    PQ Training, page 16


    Recording data setup 3

    ENTER

    ENTER

    ENTER

    ENTER

    POWER:Pg

    ENERGY:Pg

    F3

    F3

    F3

    F3

    Recording data setup, 3

    • Enabling recording cogeneration will store power, power factor and energy values separately for consumption and generation.

    • Device allows to separately record inductive and capacitive reactive powers, power factors and energies.

    PQ Training, page 17


    Approximate maximum recording times

    Approximate maximum recording times

    • The four parameter configurations are examples; other maximum recording times will vary. For maximum length for a specific configuration, start a recording and press MENU button.

    • The recording durations are APPROXIMATIONS.

    • The times assume memory is empty.

    PQ Training, page 18


    Recording data step 2

    Recording data, step 2

    • If you chose manual start, press START/STOP button. The recording will start at the beginning of the next minute.

    • Patiently wait…

    PQ Training, page 19


    Downloading data from recorder to computer 1

    Downloading data from recorder to computer, 1

    • Connect analyzer to a PC using supplied RS-232 cable.

    • If your PC is not equipped with an RS-232 port but has a USB port, there is a USB to RS-232 converter available from Amprobe. (P/N RS-USB)

    PQ Training, page 20


    Downloading data from recorder to computer 2

    Downloading data from recorder to computer, 2

    • Start Download Suite.

    • The software needs to be installed prior to use. Windows will not recognize power quality analyzers.

    PQ Training, page 21


    Downloading data from recorder to computer 3

    Downloading data from recorder to computer, 3

    • Follow the on-screen instructions to start download.

    PQ Training, page 22


    Downloading data from recorder to computer 4

    Downloading data from recorder to computer, 4

    • Select sessions for downloading.

    • Wait for the downloads to complete.

    PQ Training, page 23


    Downloading data from recorder to computer 5

    Downloading data from recorder to computer, 5

    • This screen allows you to:

      • specify where all or some of the downloaded files will be saved

      • change the default filenames if you don’t like the defaults

    PQ Training, page 24


    Downloading data from recorder to computer 6

    Downloading data from recorder to computer, 6

    • Last, choose which of the downloaded files you would like to work with…

    PQ Training, page 25


    Analyzing data on the computer

    Analyzing data on the computer

    • Download Suite lets you view data in multiple ways:

      • historical (trend) tables and graphs

      • meters

      • bar graphs for harmonic contents information

      • and more…

    PQ Training, page 26


    What s in the window

    What’s in the window

    Menu and toolbar

    Session information

    Display and edit information about a session.

    Navigator

    List created visualizations. Right-click on visualization to see available actions.

    Assistant

    Easy access to frequently used actions.

    PQ Training, page 27


    Creating a visualization using wizards

    1. Click on “Create visualization”

    4. Enter title

    3. Choose parameters

    2. Choose visualization type

    Creating a visualization using wizards

    PQ Training, page 28


    Visualization context menu

    Visualization context menu

    • Right-clicking on a visualization will reveal a menu with actions that can be performed.

    • From here you can:

      • zoom and pan

      • rename

      • copy to clipboard

      • lock cursor

      • print

      • change properties

    • Some types of visualizations will have non-applicable actions grayed-out.

    PQ Training, page 29


    Chart properties

    Chart properties

    • Charts allow you to set parameter colors based on type or phase. Additionally, they can be set either individually or for all charts in a session.

    • There are quite a few attributes that can be controlled through visualization properties (value labels, scaling, displayed series, etc.).

    PQ Training, page 30


    Programming device by a pc

    Programming device by a PC

    • Available by clicking on File-> Program Device, or through Wizard interface.

    • Allows you to program device much more easily and is quicker than using device’s keypad.

    • Displays device’s status and information.

    • Not all devices support this feature.

    PQ Training, page 31


    Real time

    Real-time

    • Download Suite is capable of acquiring real-time data (with few seconds delay) from devices supporting this feature.

    • This data should only be used in order to verify connections to installation or to get a quick look at the system. The sample rate is too low for any kind of accurate analysis.

    • Most of the visualization features are supported in real-time mode.

    • In order to stop data acquisition, click on Ø button.

    PQ Training, page 32


    Power quality recorders

    Power Quality Recorders

    PQ Training, page 33


    Power quality clamps

    Power Quality Clamps

    PQ Training, page 34


    Topics of this presentation

    FAQ

    Q: Where can I find harmonic signatures for different loads?

    • A: Here are links to some articles on the subject:

      • http://ecmweb.com/mag/electric_hows_whys_harmonic/index.html - At the bottom of the page, there is a link to a table giving general information about harmonic contributions of different loads. For specifics, refer to equipment manufacturer’s literature.

      • http://ecmweb.com/mag/electric_effects_harmonics_power/ - The waveform distortion signatures paragraph lists some causes for distortion and their signatures.

      • http://ecmweb.com/mag/electric_learning_read_waveform/ - Another article with waveform signatures.

    • Q: How can I order Amprobe’s PQ tutorials?

    • A: The tutorials are available for order by phone 206-340-0773 or by fax 206-340-8005. The lit code order number is 2765615.

    PQ Training, page 35


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