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8 —

Procedures for Testing with the DX Host

NOTICE: Review all safety information provided with the equipment and presented in chapter 1 —“General
Operating Information” before setting up or operating.

Confirm that the Baker DX setup procedure has been followed. Refer to chapter 5 —“Setting up the Baker
DX Tester” as needed.

Refer to chapter 7 —“Setting up Fixtures, Test Accessories, and lead connections” for information needed on
this topic.

Recommended Testing Sequence

To test three-phase AC induction motors adequately, and to have effective and predictive
maintenance programs, Megger recommends the following test sequence to achieve the best
results. The general idea is to perform a sequence of progressively more rigorous tests, adopting
the practice that if a test fails, troubleshooting and repair should begin at that time. More
rigorous testing should only commence after satisfactory diagnosis and/or repair

.

The recommended testing sequence is:

1.

Resistance, inductance, capacitance/impedance tests

2.

DC MegOhm, DA/PI, and Step Voltage or HiPot tests (insulation resistance, insulation
parameters)

3.

Surge tests (option to include Partial Discharge (PD) data collection)

Surge testing procedures are divided into two categories: three-phase coil testing and single-coil
testing. Be sure to follow the procedures that apply to your task at hand.

In addition to the primary test processes noted above, the Baker DX can conduct low-voltage
armature and rotor influence check (RIC) tests, which are special procedures that collect
resistance, inductance, and impedance measurements.

Coil Resistance, Inductance, and Capacitance Tests Using the DX Host

Coil resistance tests look for resistance imbalance between phases. You can use this information
with the Surveyor DX software to look for discrepancies between measured resistance values,
previous measurements, and nameplate values. 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 acceptable.

Coil induction 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
measurements or values specified by the original equipment manufacturers.

In addition, the DX capacitance tests only measure capacitance and D/Q. No impedance values
or phase angle values are induced.

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Содержание Baker DX

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Страница 3: ...s document may be reproduced in part or in full by any means such as photocopying photographs electronic recording videotaping facsimile and so on without written permission from Megger Limited CAUTIO...

Страница 4: ...ent and measuring instruments for power applications acquired the Baker Instruments business from SKF Group in August of 2018 For over 50 years the Baker Instruments business has led the electrical mo...

Страница 5: ...on the approximation of the laws related to Member States relating to the electromagnetic compatibility as amended by Council Directive 93 68 EEC NOTE due to the phenomena being observed and the mate...

Страница 6: ...es or by other misuse is excluded from the warranty The instrument calibration is warranted for one year This Warranty does not affect your statutory rights under any applicable law in force or your c...

Страница 7: ...ew 19 Main Elements 19 Test and Function Modes 20 Mode Submenus 20 Popup Menus 23 Other Interface Display Features 24 4 Using Baker DX Non Test Functions 29 Data Management Operations 29 Managing Repo...

Страница 8: ...Discharge Testing Overview and Preparation 81 Partial Discharge Testing Three phase Coil Mode 85 Determining a Known good Coil to Use as a Reference 93 Surge Testing Procedure for Single Coil Mode 98...

Страница 9: ...Table of Contents megger com vii DC and Surge Tests Voltages 137 Recommended Test Voltages 137 RIC Templates 139 Index 141...

Страница 10: ...Table of Contents viii Baker DX 71 030 User Guide EN V10 www megger com...

Страница 11: ...strument by ground terminal Connects to PPX power pack ground terminal when used with PPX Also used to connect to known good ground source when Open Ground Detect feature is disabled Warning about haz...

Страница 12: ...know what test is being performed and when For example do not adjust test leads when operating a footswitch Leads will have live voltage and severe electrical shock may result For capacitor started m...

Страница 13: ...arts warning You must replace defective damaged or broken test leads with factory authorized parts to ensure safe operation and maintain performance specifications Ground the product The devices cover...

Страница 14: ...with a red Equipment Stop E Stop button on the front panel of the unit Use it to quickly discontinue a test and to shut off power to the power pack s high voltage circuitry The button will remain lock...

Страница 15: ...Equipment Stop button is on top of the Baker ZTX unit and it is in the line with the status lights on the remote E Stop accessory Figure 3 Baker ZTX unit and Remote E Stop Equipment Stop buttons Afte...

Страница 16: ...ollution Degree II From IEC 61010 1 3 6 6 2 Only non conductive pollution occurs However temporary conductivity caused by condensation is expected Power Requirements Using the provided AC power cord c...

Страница 17: ...o perform coil and DC motor tests and have low voltage circuit resistance impedance capacitance phase angle and dissipation factor quality factor testing capabilities Baker DX testers are compatible w...

Страница 18: ...evices 2 Start or Push to Test PTT button The start or Push to Test PTT button works whether the unit is in standalone mode attached to a power pack or operated with an auxiliary Baker ZTX unit The PT...

Страница 19: ...ty 7 Resistance inductance capacitance lead port Full Kelvin connection leads are used for resistance inductance and capacitance testing Both sides of the connection clips must be in contact with the...

Страница 20: ...es includes seven models DX4 4 kV DX6 6 kV DX6HO 6 kV DX12 12 kV DX12HO 12 kV the DX15 15 kV and the DX15A 15 kV with built in ZTX They have common base functions but vary by capacity The capacity and...

Страница 21: ...e option of built in armature test capability with convenient front panel connections for the ATF 5000 armature test fixture The maximum armature test voltage is 1500V The Baker DX 15A model has all t...

Страница 22: ...ay They incorporate a supply monitor for safe operation from a well grounded supply In addition 60kV rated test lead cables are provided Voltage rise time is 100 200 nanoseconds so the power packs com...

Страница 23: ...high current Surge test adaptor for DC motors form coils and other low impedance windings The following graphics show the Baker DX with the Baker ZTX unit along with several other options that can be...

Страница 24: ...s the Start PTT button The footswitch enables hands free use of the unit and gives you additional operating position options Figure 10 Footswitch accessory Remote E Stop and Lights Accessory The remot...

Страница 25: ...foam lined hard shell This case has an extendable handle and wheels for easy transport Figure 12 Hard side Pelican carrying case The soft side case shown below has a convenient storage pocket for sto...

Страница 26: ...le the probes are used during armature bar to bar and span testing Figure 14 Clip and probe testing accessories Armature Test Fixture The ATF 5000 armature test fixture is used to conveniently perform...

Страница 27: ...veyor DX Reports The Surveyor DX application generates the following types of reports depending on the source data collected from the tester RLC Resistance inductance capacitance D Q impedance DC Test...

Страница 28: ...Baker DX Instrument Overview 18 Baker DX 71 030 User Guide EN V10 www megger com...

Страница 29: ...s The Main Display Area displays all measurements test results and more as you execute your tests The Status Bar displays information about the Active Folder and Active Record The elements show you wh...

Страница 30: ...he 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 19 Mode...

Страница 31: ...enu example In this example the Surge test three phase coil mode submenu is shown Figure 21 Surge test mode submenu example When you touch the Reports icon then the Display icon in the Mode Menu the m...

Страница 32: ...eference Waveform Selection icon used to select optional coil test displays PD touching this icon enables PD testing Icon turns green and PD data fields appear in the display Once the reference is set...

Страница 33: ...the Display Area when the RLC test selection icon first icon from the left in the Mode Submenu is touched Figure 24 Popup menu appearing when the mode icon is touched The details of this popup menu a...

Страница 34: ...lements on the X and Y axes change according to the mode the unit is in and the test type being conducted Figure 26 Axis elements change and connection graphic In some screens you will see a graphic t...

Страница 35: ...e currently viewing The far left and far right buttons move you directly to the first and last measurements respectively while the inner buttons move you to previous and next results The center button...

Страница 36: ...ct 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 Disp...

Страница 37: ...tage changes such as during ramp up the counter starts over The pulse count also appears in the test report The following graphic shows the pulse counter and other display elements when used in three...

Страница 38: ...Baker DX User Interface Overview 28 Baker DX 71 030 User Guide EN V10 www megger com...

Страница 39: ...a Folders icon Touching this icon brings the Folder and Record lists into the Display Area as shown below Figure 31 Data folder mode Managing Test Data The submode icons for Data Folders mode are self...

Страница 40: ...ve them in You must create a new folder or have an existing folder highlighted to create and store a new record 3 Select whether you want to create a new folder Folder or a new record Record You can o...

Страница 41: ...shown in the example below Figure 33 Active Folder and Active Record display example NOTE Ensure that you have a clear plan or policy in place before naming folders and records for test activities A...

Страница 42: ...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 t...

Страница 43: ...nd Next arrows allow you to go through the results that are available for the selected test type NOTE The test type selection icons are located just above their corresponding icons in the Mode Menu 6...

Страница 44: ...k to make sure you really want to delete all data within a given record Deleting a Folder Deleting a folder follows a similar procedure 1 Touch the Data Folder icon in the mode menu 2 Select the folde...

Страница 45: ...ng the header information you will want to use When these preparations have been completed all reports you generate will include these elements Inserting a Logo in Reports The Baker DX can store a log...

Страница 46: ...B drive then remove the drive and insert it into the USB port on the front panel of the Baker DX Go to the Reports screen and wait for the transfer to complete NOTE Depending on how security is set up...

Страница 47: ...rt Header icon when the Reports submenu changes as shown below Figure 39 Starting reports mode 2 This opens a form like the one shown below which you will use to define the information you want to inc...

Страница 48: ...report header form and the information will be loaded into the field you selected Figure 41 Touch screen keyboard NOTE The report header information remains unchanged and will be used for all reports...

Страница 49: ...fter the data is loaded touch the Report icon then the Display icon 3 Connect a USB printer to the USB port installation of a printer driver is not necessary When the printer is powered on and ready t...

Страница 50: ...computer 4 Acquire the DX Viewer utility software from the Baker DX product documentation CD or the Megger website https us megger com static electric motor analyzer baker dx 1 software and install it...

Страница 51: ...would use to enable or disable open ground detect This is typically used in situations such as testing on a ship where there is no earth ground Generally this should be enabled When enabled and an op...

Страница 52: ...ettings in admin mode but that mode is reserved for Megger personnel The admin password is based on hardware specific to the machine and cannot be changed Touch the Install Upgrades icon to open an En...

Страница 53: ...to get a good representation of the waveform The Compensation Temperatures in Celsius set here are the compensate to temperatures standards used in testing The compensate from temperatures are current...

Страница 54: ...function selected In this example when the Times Limits then DC Test Times icon is touched the popup menu changes to display the options for DC test times Figure 47 Multi level Popup Menu example Par...

Страница 55: ...two metrics determines what level of partial discharge is considered significant for the unit being tested These levels are set in the User Settings screen under the PD settings heading on the lower l...

Страница 56: ...us surge pulses and comparing them to the current pulse If the voltage step is too high you might step over the point where PD events first occur so it is important that voltage ramping occur in contr...

Страница 57: ...here occasional non conducting condensing pollution can be encountered Avoid stacking objects of any kind on or near the Baker DX Avoid placing the unit on other items other than power packs or flat s...

Страница 58: ...Setting up the Baker DX Tester 48 Baker DX 71 030 User Guide EN V10 www megger com...

Страница 59: ...ould not hinder operation of GFI protected AC power circuits Instrument Notices Before use Use the footswitch to facilitate armature bar to bar or span testing Make sure no printers are connected to t...

Страница 60: ...d lead to the bar labeled GND L2 L3 Leads Figure 51 DX leads and fixture connections to Baker ZTX rear panel 5 Connect the bar to bar test fixture to the black braided test head cable There are two co...

Страница 61: ...l mode High voltage tester leads leads 1 and 2 only DX Host Low voltage armature or coil tests Low voltage test probes 83004 connected to RLC connector or low voltage RLC tester leads DX Host Rotor in...

Страница 62: ...rence of the commutator are tested For example bars 1 and 2 are tested then bars 2 and 3 are tested then bars 3 and 4 are tested The pattern continues until all commutator bars are tested Figure 53 AT...

Страница 63: ...e armature face as shown to help identify current testing location 2 Position the armature fixture on the armature at a selected starting point Use the Hot brush adjustment knobs to adjust contact for...

Страница 64: ...ries and Lead Connections 54 Baker DX 71 030 User Guide EN V10 www megger com 4 Ensure the test lead cable is properly connected to the armature test fixture Figure 56 Baker ZTX connected to bar to ba...

Страница 65: ...oles of a DC motor is done with a set of special test leads called ATP02 C test clips The clips connectors attach to source and sense connectors of the Baker ZTX Baker PP85 or Baker DX15A The test cli...

Страница 66: ...megger com ATP02 P Test Probes The armature test low impedance test probes can be used for bar to bar testing though they are more commonly used in span testing Figure 59 ATP 02 P test probes Figure 6...

Страница 67: ...nce tests can be conducted using these low voltage Kelvin probes Figure 61 83004 low voltage test probes Low voltage Coil Connection For low voltage single coil testing the tester s low voltage RLC te...

Страница 68: ...also need part of the information to determine test voltages needed High voltage leads are used during DC and Surge testing The connections described here are for three phase testing mode 1 Ensure mo...

Страница 69: ...t of the information to determine test voltages needed Low voltage leads are used during RLC testing 1 Ensure motor leads are properly labeled to provide accurate test data 2 Connect the tester s RLC...

Страница 70: ...a copy of this template and print or paste it on heavier stock then cut it out and place the template over the motor to indicate angle changes during testing 2 Larger versions of the template are ava...

Страница 71: ...ries three phase coil testing and single coil testing Be sure to follow the procedures that apply to your task at hand In addition to the primary test processes noted above the Baker DX can conduct lo...

Страница 72: ...ion or remove the rotor to eliminate the effect RLC Test Procedure Overview The general test procedure for RLC testing includes the following steps 1 Connect low voltage RLC test leads 2 Select RLC mo...

Страница 73: ...e Folder and Active Record display the desired folder and record to be used for the subsequent RLC tests Figure 66 Resistance test start screen 3 Touch the RLC Test Mode icon 4 Ensure that the Resista...

Страница 74: ...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 unbal...

Страница 75: ...il phases The DX performs these tests at a single specified frequency Figure 69 Inductance test start screen 1 Touch the RLC Test Selection icon to change it to show the Inductance Test icon 2 The sub...

Страница 76: ...tomatically be made for all three phases The Leads Energized message will appear at the top of the display When the test finishes the results and unbalance will display on the screen Figure 70 Inducta...

Страница 77: ...end of the resistance test as well The DX measures the capacitance of the core across the ground wall insulation Modify connections of the RLC test leads to a capacitor test configuration 1 Connect RL...

Страница 78: ...he Active Folder and Active Record Figure 72 Capacitance test start screen 5 Touch the RLC Test Selection icon to change it to show the Capacitance Test icon 6 The submenu changes as shown in the exam...

Страница 79: ...ata will include in the capacitance results Figure 73 Capacitance test results screen 8 Touch the Save icon to save your data unless you plan to conduct more capacitance tests data will save to the se...

Страница 80: ...s Lead 3 is not connected but is still hot Ensure that the unused lead is safely set aside to prevent accidental contact with equipment unit under test or the operator to avoid injury or damage NOTE D...

Страница 81: ...or Testing Theory Reference Manual which has supporting information and details about DC testing capabilities and methods DC Test Procedure Overview The general test procedure for DC testing with the...

Страница 82: ...ting up Fixtures Test Accessories and lead connection 2 Ensure that the Active Folder and Active Record show the locations where you want to save the DC tests data Figure 74 DC Tests start screen 3 To...

Страница 83: ...ulation used in your motor by touching the Thermo Plastic button in the start screen The buttons toggles between two options Thermo Plastic and Thermo Setting The software uses different temperature c...

Страница 84: ...mple below release the Start PTT button b Yellow highlights identify the test mode selected and locked controls The submenu will look like the following while the tests are running Figure 78 Test subm...

Страница 85: ...will begin the count down Repeat the process for each step until you complete the second to the last step 1500 volts is the third step for this example 4 For the last step after raising the voltage l...

Страница 86: ...to evaluate the linearity of the charging current Otherwise the process is the same as conducting a conventional DC HiPot test When ramping the test voltage be sure to increase the voltage slowly and...

Страница 87: ...gh enough there will be an arc between the wires The Baker DX detects arcs by observing a shift in the surge waveform produced by the test On the Baker DX the Surge test is performed with an impulse g...

Страница 88: ...t high voltage leads are connected to the motor under test 2 Ensure that the Active Folder and Active Record indicate the location of where you want to save Surge test data 3 Touch the Surge icon to b...

Страница 89: ...art the test 9 You must predetermine the input values for the test before starting the test Refer to the Recommended Test Voltages section in 9 Appendix C DC and Surge Tests Voltages for recommended t...

Страница 90: ...and repeat the process from step 10 then repeat again for coil 3 15 The results of the winding tests of a wye or delta configuration will appear as shown below 16 Touch the Save icon to save your res...

Страница 91: ...ltage PDIV repetitive partial discharge inception voltage RPDIV repetitive partial discharge extinction voltage RPDEV and partial discharge extinction voltage PDEV The RPDIV and RPDEV voltages are det...

Страница 92: ...tions for reliable and comparable results Ideally the testing environment should be controlled to provide consistent temperature and humidity In any case you should record the ambient temperature and...

Страница 93: ...d for the most accurate PD records 1 Connect the test leads to the device under test as normal for a Surge test in three phase coil mode or single coil mode as needed 2 Apply just the initial surge vo...

Страница 94: ...se You will likely notice this noise as small points registering just under the waveform within the threshold bars as shown in the example excerpt below Figure 92 Example of system level noise 9 This...

Страница 95: ...shows the voltage level of the PD signal detected value displayed in millivolts The PD events detected PD number of events field shows the number of PD events that exceeded the PD number of events val...

Страница 96: ...threshold and PD events values in the User Settings screen to appropriately indicate PD When PD activity exceeds the threshold value a PD pulse occurs the PDIV level is reached and the surge voltage v...

Страница 97: ...ction thresholds for the first phase discontinue the test and save the results 10 Touch the Lead 2 icon and repeat the process for the second phase then Lead 3 in turn Testing the second and third pha...

Страница 98: ...harge activity is occurring and what it looks like usually requires viewing the PD data in an expanded view Essentially the viewing options include Waveforms locked With the Locked Unlocked icon in th...

Страница 99: ...lly zoomed out Figure 97 PDIV and RPDIV displayed in locked view In the following example the waveforms are locked and the PD waveform signal expands with the surge waveform down to 2 s per division t...

Страница 100: ...lay scale can be adjusted without affecting the surge waveform display scale When the two waveforms are not synchronized the activity areas on the PD waveform will not correspond with their overlaid l...

Страница 101: ...two ways The first report is the normal surge report with the PD data included The waveform displayed is the last waveform captured during the testing process The partial discharge signal is overlaid...

Страница 102: ...st phase with the most pulses If the duration of tests for each phase is uneven the shorter phases will not extend across the entire graph For this reason you should attempt to keep the duration of ea...

Страница 103: ...ars 1 and 2 are commonly used as a starting point for armature span testing bars 1 and 5 are common 2 Press the Surge test icon 3 Push and hold the Start PTT button The Ramp Rate and Waveform Zoom pop...

Страница 104: ...g the Start PTT button and holding it for approximately 10 pulses When armature testing retest the first bar pair or span to obtain information for those windings then move on to the next pair or span...

Страница 105: ...can locate and select a previously saved reference 1 Select folder record then reference You will see a dialog confirming that the new reference was set Figure 105 Using the recall reference feature...

Страница 106: ...USB Drive 1 Touch the Surge test icon then select single coil test mode 2 Touch the Waveform Selection icon to the left of the PD icon or right of the Reference Waveform icon 3 Two buttons appear on...

Страница 107: ...he left of the PD button or right of the Reference Waveform button 3 Two buttons appear on the submenu Ref Wave Export and Ref Wave Import 4 Touch the Ref Wave Export button 5 A dialog box appears in...

Страница 108: ...H VOLTAGE TEST LEADS EXERCISE CAUTION TO AVOID INJURY 1 Connect red tester lead 1 to coil lead 1 and red tester lead 2 to coil lead 2 2 When the select active lead icon on the Baker DX is 1 2 red test...

Страница 109: ...xample and for armature span testing ensure that the Configuration options icon shows the standalone unit selected Other uses of this process would select the Power Pack ZTX or Armature DX 15A icons 3...

Страница 110: ...e first pair bar to bar or span to collect data for those windings First test was used to obtain reference only 7 On the DX host press and hold the Start PTT button or footswitch Use the pulse counter...

Страница 111: ...ference waveform will be needed for each direction If test lead reversal is required or desired you should test all coils with lead 1 active and using an appropriate reference waveform first After pre...

Страница 112: ...coil tested The reference plot is shown in red the coil measurement plot is in black The Pulse Counter displays the number of pulses applied at a specific voltage The Active EAR Bar Graph shows you a...

Страница 113: ...e the data Deleting Data When you delete data you have a couple of options You can delete individual coil data during testing by touching the Backspace icon then retesting the coil as needed You can d...

Страница 114: ...ng single coil mode 2 For this example touch the Standalone Unit icon then the Coil Mode Selection icon in the Mode Submenu 3 From the popup menu select the Single coil mode icon 4 Touch on the Enable...

Страница 115: ...PD events values in the User Settings screen to appropriately indicate PD When PD activity exceeds the threshold value a PD pulse occurs the PDIV level is reached and the surge voltage value is recor...

Страница 116: ...anded view 10 When you acquire the extinction thresholds discontinue the test and save the results 11 Repeat the process for additional coils as needed Alternatively you can use the single coil testin...

Страница 117: ...will appear in a dialog box like the one shown below Figure 119 Override zero start message dialog 3 Test each subsequent coil by connecting the clips to each coil and pressing and holding the Start b...

Страница 118: ...cted in single coil or three phase coil mode In single coil mode the available reports include three elements First we have the EAR report for each coil with respect to the reference waveform as shown...

Страница 119: ...determine go no go status for each coil based on its PD results or it can be used to help determine coil placement if being placed into a stator Coils with more PD should be located further away from...

Страница 120: ...nformation can be used to rate coils Essentially you can rate coils from 0 100 percent with the lower percentage indicating better coils less PD activity The ratings can help determine coil placement...

Страница 121: ...suggest that at least 325 volts per turn of the coil being tested If for example three bars are spanned with three turns per coil then the test voltage would be 3 x 3 x 325V 2925V Unfortunately such...

Страница 122: ...the probes are placed on the commutator the test button or foot switch on the Surge tester is pressed and a Surge test voltage is applied between the probes NOTE A second operator should be available...

Страница 123: ...a reference For example bar 1 and bar 5 and place the probes on these bars to start the process 9 From this point the process is the same as testing single coils Refer to the Surge testing procedure...

Страница 124: ...the armature winding is indicated Figure 126 Good armature span waveform Figure 127 Bad armature span waveform 12 Touch the Save icon to store the test results in the Active Folder Active Record It wi...

Страница 125: ...t you want to see The buttons along the right edge are used to select the type of test measurement you want to plot Figure 128 Low voltage armature or coil mode screen elements In the submenu the firs...

Страница 126: ...e used to test single coils 3 Check the Status Bar to ensure that the Active Folder and Active Record fields display the intended target destinations for your test data Figure 129 Low voltage armature...

Страница 127: ...easurement for the current coil or winding will be added to the results as shown in the following example Figure 131 Low voltage armature or coil test results screen 7 Move the probes or leads 1 and 2...

Страница 128: ...tons along the right edge are used to select the type of test measurement you want to plot Figure 132 RIC test screen elements In the submenu the first icon from the left the RIC Mode icon shows you t...

Страница 129: ...estinations for your test data Figure 133 RIC test start screen 4 Select the RLC mode icon in the Mode Menu then the RIC Mode icon in the Mode Submenu The starting screen should then look like the one...

Страница 130: ...s the current test position viewed which is indicated in the plot by the red cursor line The cursor line indicates the position being updated during test so normally it would be ahead of the recorded...

Страница 131: ...st screen with Touchpad to select target test You can simply view the results if you like or you can retest at that point by pushing the Start PTT button The rotor will have to be repositioned to be a...

Страница 132: ...on every rotor position the test results will be plotted in the Display Area In the following example the test is still in progress but the results are representative of what you will see during test...

Страница 133: ...nse ports on the front panel of the tester The following procedure focuses on testing low impedance armature windings with references to coil testing where needed WARNING High voltage testing Make sur...

Страница 134: ...ars 1 and 2 NOTE When testing coils a reference will be needed Refer to the Determining a Known good Coil to Use as a Reference section found earlier in this chapter for details on this process For ar...

Страница 135: ...e armature or all coils return the Voltage Output Control knob to Min full counterclockwise rotation Figure 139 Example waveforms collected DX 15A with built in ZTX 10 Touch the Save icon to store the...

Страница 136: ...esting with the Baker ZTX 126 Baker DX 71 030 User Guide EN V10 www megger com In the simple example below you can see the test results for interpole coil 4 Figure 140 Low impedance coil test results...

Страница 137: ...Step 1 Basic information Write down all basic instrument information including the following Product Model number Serial number NOTE This information is located on the rear panel label If the tester h...

Страница 138: ...ng are the common application related problems Please review the following cases The Surge tester will not give the desired output test voltage for the apparatus under test The test motor may be too l...

Страница 139: ...ng all accepted electrical and safety practices when working with a generator s output The output is often floating that is no ground is made at the generator An appropriate ground such as a service e...

Страница 140: ...ondition Disconnect the test leads from the motor and isolate the tester from any grounded surface Reduce the output to minimum and run a DC test with an open lead condition The display should indicat...

Страница 141: ...form The display shows a limited output amplitude surge waveform The display rises normally but stops at some point Alternatively continually increase the output control for successive tests to achiev...

Страница 142: ...when sending the tester to Megger Baker Instruments Company Name Your Name Mailing Address Shipping Address Phone Number Fax Number From the nameplate on the back of the instrument Megger Product Num...

Страница 143: ...0 Surge energy 0 32 J 0 72 J 1 8 J 2 88 J 7 2 J 11 J Short circuit current 280 A 340 A 450 A 600 A 800 A 700 A 65 H load voltage 4 kV 6 kV 6 kV 12 kV 12 kV 15 kV Surge voltage accuracy 2 12 12 12 12 1...

Страница 144: ...100 to 10 000 3 accuracy Source frequency 50 to 4000 Hz 0 2 to 100 2 accuracy 1 000 to 5 000 mH at 120 Hz 15 accuracy 0 002 to 0 2 4 1 m 100 to 1 000 mH at 120 Hz 8 accuracy 0 05 to 100 mH at 1 kHz 5...

Страница 145: ...Rotating Machinery IEEE 112 1991 Test Procedures for Polyphase Induction Motors and Generators IEEE 113 1985 Guide on Test Procedures for DC Machines IEEE 115 1983 Test Procedures for Synchronous Mac...

Страница 146: ...sa com Reprints of IEC standards are available from International Electrotechnical Commission IEC www IEC ch Reprints of IEEE standards are available from IEEE Customer Service 445 Hoes Lane Piscatawa...

Страница 147: ...34 15 and Megger recommended testing voltages NOTE The tables list representations of motors as well as the formulas to calculate voltages so that you can calculate test voltage of any size motor Tabl...

Страница 148: ...0 16 354 13 800 11 268 48 620 31 603 Table 9 IEEE 522 Surge testing V Line Per Unit New 3 5 Per Unit In Service 75 of New 480 392 1 372 1 029 575 469 1 642 1 232 600 490 1 715 1 286 2 300 1 878 6 573...

Страница 149: ...megger com 139 RIC Templates Figure 141 RIC template 1...

Страница 150: ...RIC templates 140 Baker DX 71 030 User Guide EN V10 www megger com Figure 142 RIC template 2...

Страница 151: ...test using DX host 61 compensating temperature and recording humidity 73 conducting step voltage or DC HiPot test 75 configuration options 10 connecting high voltage leads to a motor 58 connecting low...

Страница 152: ...xternal USB drive 97 inductance test 65 inductance test using DX host 61 inserting logos in reports 35 instrument overview 7 insulation resistance test 70 interface display features 24 K known good co...

Страница 153: ...equirements 6 preparing for tests PD testing three phase coil mode 81 printing reports 35 39 Procedures for testing with the Baker ZTX 123 procedures for testing with the DX host 61 pulse counter 27 R...

Страница 154: ...tings 41 70 78 102 T technical specifications calibration and applicable standards 133 temperature and humidity PD testing three phase mode 82 temperature scale setting 43 test accessories 16 test and...

Страница 155: ...Index megger com 145...

Страница 156: ...megger com 146...

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