Megger Baker DX Series User manual

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Baker DX Series
Static Motor Analyzer
Quick Reference Guide
Part number: 71-031 EN V1

Baker DX Series
Static Motor Analyzer
Quick Reference Guide
For use with 4 kV, 6 kV, 6 kV HO (high output), 12 kV, 12 kV HO, 15 kV and 15A models.
Reference number of the user manual: 71-031 EN
Revision: V1
Date of publication: December 2018
Copyright Megger.
All rights are reserved. No part of this manual may be copied by photographic or other means
unless Megger has previously consented in writing. The contents of this manual are subject to
change without notice.
Megger can not be held responsible for technical or printing errors or defects in this manual.
Megger also declines any liability for damages resulting directly or indirectly from the delivery,
supply or use of this case.
Baker DX Series Static Motor Analyzer www.megger.comi

This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the device is used in its
installation. This equipment generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the product manual, may cause harmful
interference to radio communications. If this equipment causes harmful interference, the
user is required to correct the interference.
Because of the phenomena being observed and the material properties being measured,
this equipment emits radioelectric energy when in active test mode. It must be ensured
that this radio energy does not cause any damage to people or equipment located
nearby.
Never exceed the maximum operational capabilities of the Baker DX tester, power
supplies, or Baker ZTX accessory. If the equipment is used in a manner not specified by
Megger, the protection provided by the equipment may be impaired.
Be sure to follow all safety procedures prescribed by your company, industry, and
applicable standards. Failure to observe these safety precautions may result in death or
serious electric shock.
Reference for additional information
The Baker DX quick reference guide is designed to provide users with an overview of the analyzer
and its basic testing and operating procedures. For complete safety information and detailed device
information, user license agreement, CE compliance, and more information on additional features,
refer to the Baker DX User Manual.
WARNING
CAUTION
Notices
www.megger.com ii

1. Baker DX instrument overview...........................................................................................
Front panel controls....................................................................................................................
Rear panel connections...............................................................................................................
User interface main elements.......................................................................................................
Test and function modes..............................................................................................................
Mode submenus..........................................................................................................................
Popup menus..............................................................................................................................
2. PREPARING FOR TESTING.....................................................................................................
Select the location for saving data...............................................................................................
Determining a known-good coil to use as a reference..................................................................
Rotor effect on testing.................................................................................................................
3. BASIC TESTING PROCEDURES..............................................................................................
Recommended testing sequence..................................................................................................
Conducting resistance, inductance, and capacitance tests............................................................
Conducting DC tests...................................................................................................................
Conducting Surge tests...............................................................................................................
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Table Of Contents
Baker DX Series Static Motor Analyzer www.megger.comiii

1. Baker DX instrument overview
Front panel controls
Figure 1. Front panel controls
Instrument Descriptions
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Rear panel controls
Figure 2. Rear panel controls

Instrument Descriptions
Baker DX Series Static Motor Analyzer www.megger.com2
User interface main elements
NOTE
This section provides an introduction to the Baker DX software user interface
elements. For further details about the various modes. Mode submenus,
popup menus and other elements that can appear during testing, refer to
the Baker DX User Manual.
Figure 3. User interface main elements.
Main Display Area—displays all measurements, test results, and more as you execute your tests.
Status Bar—displays information about the Active Folder and Active Record. The elements show
you where the information will be saved for the motor currently under test. The right third of the
Status Bar is dynamic, displaying additional information such as the date and time, a running clock,
notice of active ZS Override mode, PTT Locked indicator, or a test counter when needed.
Mode Submenu—items here change depending on the mode selected along with other items
selected via the Mode Submenu itself or popup menus that appear in the Display Area.
Mode Menu—used to select the main mode of operation. Test and function modes are described
below. The Mode Menu does not change, and is always available.

Instrument Descriptions
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Test and function modes
The large icons in the Mode Menu at the bottom of the touch screen represent the primary test
modes. When a Mode Menu icon is touched, the icon will be surrounded by a blue background
that indicates which mode the unit is in. The blue background also connects the selected mode
with its submenu above.
The graphic below identifies the test and function modes that become active when you touch the
corresponding icons.
Figure 4. Mode menu icon descriptions.
Mode submenus
The control icons for each mode appear in the submenu just above the Mode Menu. The Mode
Submenu icons correspond to the Mode Menu item selected. In the following example, we see
the descriptions of the Mode Submenu icons that appear when the RLC Tests icon is touched.
Figure 5. Mode submenu icons example.

Figure 6. Popup menu appearing when the RLC test selection icon is touched.
Preparing For Testing
Baker DX Series Static Motor Analyzer www.megger.com4
Popup menus
Popup menus appear when specific functions are selected during the testing process. In the ex-
ample below, a popup appears in the Main Display Area when the RLC test selection icon is
touched.
The details of this popup menu are provided in the example below.
Figure 7. Popup menu icon descriptions for test type selection.

Preparing For Testing
Figure 8. Top bar showing voltage and megohms active.
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During HiPot testing, the top bar is active and can display two of the three measurement types
shown—either voltage and current, or voltage and megohms as shown in this example. The
grayed-out type is inactive.
To select which measurement type to activate, simply touch either the megohms or current displays.
Depending on what is selected (megohms or current), the scale on the right side changes. The plot
line in the Main Display Area also changes (black for megohms and red for current).
NOTE
While touching the values for current or megohm will change the
measurements and scales presented, touching the screen in other parts
of the Main Display Area will cause the unit to stop testing, which will be
recorded as a user abort.
The voltage scale is always displayed and its plot color is blue.
In surge mode, the elements change based on the type of coil selected for testing. In each mode,
a pulse counter shows you the number of pulses applied at a specific voltage during the test. If the
voltage changes (such as during ramp up) the counter starts over.
The pulse count also appears in the test report.

Figure 9. Selecting the active folder and record for saving test data.
Preparing For Testing
Baker DX Series Static Motor Analyzer www.megger.com6
2. Preparing for testing
Select the location for saving data
1. Ensure that the proper active folder and record for saving data are selected. As you execute your
tests, you will be prompted to save the test data as each test mode completes.
2. In the Mode Menu, press the Data Folders icon. Touching this icon brings the Folder and
Record lists into the Display Area as shown below.
3. Touch the record and folder you want to use for your testing. The selected location will appear
in the Status Bar as Active Folder and Active Record.

Viewing test results
1. To view existing data, touch the Report icon in the mode menu.
2. When you touch a folder in the Folder list, such as the MEGGER folder in the following
example, the folder will be highlighted and all associated records that are in that folder will
appear in the Record list.
3. Touch/highlight an item in the Record list and the results associated with the highlighted record
will appear in the Results list.
Figure 10. Record results.
Preparing For Testing
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4. When you touch the Display icon (which functions like a print preview), submenu items appear
that allow results shown in the Main Display Area to be viewed according to test type, or to
be printed.

5. The Previous and Next arrows allow you to go through the results that are available for the
selected test type.
Preparing For Testing
Baker DX Series Static Motor Analyzer www.megger.com8
NOTE
The test type selection icons are located just above their corresponding icons
in the Mode Menu.
6. An entry on the right side of the Status Bar shows you which result is displayed out of the total
number of available results.
7. Touch the Print button to print your report to a printer attached to the USB port.
8. Touch the Done button to return the Display Area to the report panel.
Determining a known-good coil to use as a reference
Rotor effect on testing
Some types of testing require using a known good coil as a reference for comparing coil waveforms
collected. If you will be conducting such tests and have not already established a reference (and
known-good coil), this process shows you how to identify a known-good coil so that you can set
the reference test for comparisons to other coils to be tested.
For details on this process, refer to the Baker DX User Manual.
When possible, remove or secure the rotor before testing. Rotors can affect testing results, particu-
larly if they move (even slightly) during testing. Some issues can be erroneous high resistance imbal-
ance in coil testing due to increased inductance, inability to polarize for DA/PI testing, or frequency
shift in one or more waveform values during surge testing. An erratic PP EAR will often result and
the shift could even trip the EAR limits.
Figure 11. Display submenu icons.

Preparing For Testing
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3. Basic testing procedures
Recommended testing sequence
1. Resistance, inductance/impedance, capacitance tests
2. DC tests (insulation resistance, DA/PI, and HiPot/step voltage)
3. Surge tests
4. PD tests (requires optional PD module)
Perform a sequence of progressively more rigorous tests.
If a test fails, troubleshoot, diagnose, and repair the problem before continuing with the next test
in the sequence.
Test leads used during testing
1. Resistance, inductance, capacitance/impedance tests: low voltage test leads; connections
modified during capacitance testing
2. DC tests: high-voltage test leads
3. Surge tests: high-voltage test leads
4. PD tests: high-voltage test leads
Conducting resistance, inductance, and capacitance tests
This unit performs coil resistance tests using low voltages (with low-voltage leads). Further testing
(such as DC-HiPot or surge testing) is not necessary until the coil resistance measurement is accept-
able.
Coil inductance tests look for changes in a winding’s inductance brought about by shorted turns
in the coils. Inductance readings for three-phase motors can be compared to each other with the
knowledge that the inductance for the three phases should be very close to each other unless there
is a short in one of the coils. Inductance measurements can also be compared to previous measure-
ments or values specified by the original equipment manufacturers. Inductance testing also provides
impedance values and angles.
DX capacitance tests measure only capacitance and D/Q. No impedance values or phase angle val-
ues are included.

Figure 12. Resistance test start screen.
Preparing For Testing
Baker DX Series Static Motor Analyzer www.megger.com10
Resistance test procedures
1. Select the folder and record to use and check the Status Bar to ensure that the Active Folder
and Active Record display the desired folder and record to be used.
2. Touch the RLC Test Mode icon.
3. The Resistance Test icon appears as the default RLC test selection.
4. If performing temperature compensation, touch the icon for the proper type of conductor
metal: aluminum or copper (Copper icon shown above).
5. If you need to define temperature compensation, touch the Temperature icon, then use the
popup keypad to input actual winding (not ambient) temperatures. Otherwise, skip to step 7.
6. The default temperature is 25° C; key in the actual winding temperature to use for
compensation and touch Done.
NOTE
The default temperature to correct to is defined in the User Settings. Refer
to the Baker DX User Manual for more information.

7. Push and release the Start (PTT) button to run the resistance test. The resistance test will be
run for all three phases automatically. The “Leads Energized” message will appear at the top of
the display. When the test finishes, the unbalance will display along with the resistance results.
Preparing For Testing
Figure 13. Resistance test results screen.
8. If this resistance test was run as a standalone test, save the results. Saving resistance data at this
time is not necessary if you plan to collect inductance and/or capacitance tests data as well; it
can all be saved together when the tests complete. When you have completed your setup, close
the screen.
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Inductance testing is conducted in a similar manner.
1. Touch the RLC test selection icon then touch the Inductance test icon in the popup menu.
2. Touch the Frequency icon then touch the frequency value in the popup menu.
3. Push and release the Start (PTT) button to run the inductance test. The inductance test will be
run for all three phases automatically. The “Leads Energized” message will again appear at the
top of the display.

Capacitance testing is also conducted in a similar manner; though cable connections will need to
be adjusted during that process.
Lead cautions still apply, but you must modify connections of the RLC test leads to a
capacitor test configuration.
Preparing For Testing
Figure 14. Capacitance test lead connections.
4. Touch the RLC test selection icon then touch the Capacitance test icon in the popup menu.
5. Push and release the Start (PTT) button to run the capacitance test.
Baker DX Series Static Motor Analyzer www.megger.com12
1. Connect RLC test lead No. 1 to any motor lead.
2. Connect RLC test lead No. 2 to ground.
3. Disconnect RLC test lead No. 3 and leave disconnected.

Preparing For Testing
Conducting DC tests
Figure 15. DC Tests start screen.
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NOTE
Because the motor’s operating voltage is the basis for the test voltages used,
you must determine the input values before starting DC or Surge tests.
Using VLL = 480 volts as an example, the base value for the DC and Surge
tests would be:
(2 x VLL) + 1,000 = 1,960 volts (2000 volts)
Refer to the Baker DX User Manual, “Appendix C — DC and surge tests
voltages” for more in-formation.
1. Ensure that the Active Folder and Active Record are those that you want to use for the DC
tests.
2. Touch the DC Tests icon then the Configuration Options icon when it appears in the
submenu. Icons for installed options will appear in a popup menu, presenting a choice of
operation such as testing on a standalone unit or a power pack.
3. For this example, touch the Standalone Unit icon.
4. If you know the type of insulation used in your motor, you can specify that by touching the
Insulation Type selection icon. Choices include Thermo Plastic or Thermo Setting.

Preparing For Testing
Baker DX Series Static Motor Analyzer www.megger.com14
Compensating temperature and recording humidity
5. To compensate temperature and/or record humidity, touch the Temperature/humidity icon;
otherwise, skip to step 7.
6. The following popup menu is used to enable/disable temperature and humidity compensation
and to select the compensation needed for these test elements when compensation is enabled.
Figure 16. Temperature and humidity compensation popup menu.
a. Touch the Enable Compensation icon or the Temperature icon.
b. The default temperature is 40° C; use the keypad to enter the actual
motor temperature then touch Done.
c. For reference purposes, you can specify the humidity by touching the
Humidity icon then use the keypad to enter the percentage of relative
humidity.
d. Touch Done after making your entry.
7. Push and hold the Start (PTT) button; the following controls appear.
a. If hands-free testing is desired, touch the Lock PTT icon. When the icon
changes to a yellow highlight as shown in the example below, release
the Start (PTT) button. When the Lock PTT icon has yellow highlighting,
PTT functions are locked. The submenu will look like the following
example while the tests are running:
Figure 18. Test submenu items with Locked PTT and MOhm/PI test selected
(both identified by yellow highlights).
Figure 17. Test submenu items.

c. Use the Increase Current Display Scale (I+) or Decrease Current
Display Scale (I-) icons as needed to adjust the current’s scale.
d. After setting the target voltage, touch the MOhm/PI icon to start
the megohm insulation resistance (IR), dielectric analysis (DA), and
polarization index (PI) tests.
Preparing For Testing
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Never leave the unit unattended when using the Lock PTT feature. High voltage may be
present, which could result in injury or death from severe electrical shock.
WARNING
b. Rotate the Voltage Output Control knob on the front panel to raise the
target voltage level (for example, 500 volts for a 480- volt motor). Use
the Fast or Slow Ramp Rate controls as needed to fine tune the level.
Figure 19. Ramp Rate controls.
8. The Status Bar displays a countdown timer for each of the megohm, step voltage, and DC
HiPot tests as shown in the following example.
Figure 20. Status Bar with Countdown Timer.
e. As each test progresses, the software displays the test results in the fields
located just above the Status Bar. The IR results appear after 60 seconds,
the DA results after 180 seconds, and the PI test after 600 seconds.