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2/24/2010 | 71-018 V11 EN  
D12R, D6R, D3R Users Manual 

 

Users Manual 

Digital Winding Tester 

D12R, D6R, 3R 

 

Baker Instrument Company, an SKF Group Company, 

4812 McMurry Ave. Suite 100 
Fort Collins, CO 80525 
(970) 282-1200 
(970) 282-1010 (FAX) 
800-752-8272 (USA Only) 
 
Note: 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 with the equipment is operated 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 does cause harmful interference, the user will be required to correct the 
interference. 
 
Due to the phenomena being observed and the material properties being measured, this 
equipment does radiate radio frequency energy while in the active test mode. Care should be taken 
to insure this radio frequency energy causes no harm to individuals or other nearby equipment. 

 

 
Information furnished in this manual by Baker Instrument Company, an SKF Group Company,, is 
believed to be accurate and reliable. However, Baker Instrument Company, an SKF Group 
Company, assumes no responsibility for the use of such information or for any infringements of 
patents or other rights of third parties that may result from its use.  No license is granted by 
implication or otherwise under any patent rights of Baker Instrument Company, an SKF Group 
Company. 

 
Warning:

  

Baker Instrument Company, an SKF Group Company, assumes no liability for damages consequent 
to the use of this product. No part of this document may be reproduced in part or in full by any 
means such as photocopying, photographs, electronic recording, videotaping, facsimile, etc., 
without written permission from Baker Instrument Company, an SKF Group Company, Fort Collins, 
Colorado. 

 

Intended use of instrument 

The D12R, D6R and D3R, is offered by Baker Instrument Company, an SKF Group Company’s 
standard products division.  This machine is intended to be used for the detection of weak 
insulation within electric motors by trained professionals. It is intended to perform only the 
specified tests that this manual explains in detail. Please refer to chapters in this manual 
concerning specific operation of instrument. 
 

Summary of Contents for 3R

Page 1: ...arby equipment Information furnished in this manual by Baker Instrument Company an SKF Group Company is believed to be accurate and reliable However Baker Instrument Company an SKF Group Company assumes no responsibility for the use of such information or for any infringements of patents or other rights of third parties that may result from its use No license is granted by implication or otherwise...

Page 2: ... Buyer returns Products accessories or options to the Baker SKF factory for warranty service Baker SKF will bear the cost of return packaging and shipping and insurance on the return shipment For Products accessories or options that Baker SKF designates as on site service only due to their size the permanence of their installation pr otherwise travel expenses including labor costs for time spent t...

Page 3: ...ections 13 On line labels 14 Safety precautions for setup 14 Initial tester power up and checkout 15 Using the footswitch 15 2 17 Test sequence voltages applicable standards 17 Recommended testing sequence 17 1 Coil Resistance test 17 2 Megohm test 17 3 Principles of the Dielectric Absorption DA test 17 4 Principles of the Polarization Index PI test 17 5 DC HiPot test 18 6 Surge test 18 Recommende...

Page 4: ...ation Notes 44 Single phase motors and two terminal devices 44 Determination of a fault 44 Form coils 45 Determination of a fault 45 Notes and tips for form coils 45 Three phase motors 46 Determination of a fault 46 Two or more single coils 46 Determination of a fault 47 Notes and precautions for two single coils 47 Wound rotor motors 47 Determination of a fault 48 Synchronous motor generator 48 D...

Page 5: ...onnection 69 Single phase lead connections 69 Note regarding 220 240 VAC units 69 Lifting the instrument 70 Supplement 2 71 PP185 power pack 71 Important safety information 71 Other Important Safety warnings 72 Instrument notices 72 Emergency Shut Off Button 73 Initial set up 73 Power pack resistance testing 74 Three phase test lead 74 Output configuration 74 Operating and shipping position 74 Sur...

Page 6: ...D Bar to bar armataure testing accessory 95 Appendix A Winding Faults 97 Appendix B Troubleshooting 99 Self help and diagnostics 99 Step 1 Basic information 99 Step 2 Applications or service problem 99 Applications What to do first 99 Other Important Safety warnings 100 Common application problems 101 Service What to do first 102 Open condition display 102 HiPot display checks 103 HiPot over curre...

Page 7: ...jury NOTICE NOTICE is the preferred signal word to address practices not related to personal injury Other Important Safety warnings Failure to follow these precautions could result in severe electrical shock or death 1 Never attempt a two party operation Always know what test is being performed and when FOR EXAMPLE DO NOT adjust test leads when footswitch is being operated Leads will have live vol...

Page 8: ...specifications 8 Ground the product This product is grounded through the grounding conductor of the power cord To avoid electrical shock plug the power cord into a properly wired grounded receptacle before connecting the product test leads Danger from loss of ground Upon loss of the protective ground connection all accessible conductive parts including knobs and controls that may appear to be insu...

Page 9: ...ation requirements The unit is intended for use in Installation Category II Portable Equipment areas and pollution Degree II Environments where occasional non conducting condensing pollution can be encountered Unpacking the unit Carefully remove the following items from the shipping boxes D3R D6R or D12R Power cord Operation manual Pollution Degree II From IEC 61010 1 3 6 6 2 Only non conductive p...

Page 10: ...as amended by Council Directive 93 68 EC and Council Directive 2004 108 EC on the approximation of the laws related to Member States relating to the electromagnetic compatibility as amended by Council Directive 93 68 EC Note due to the phenomena being observed and the material properties being measured this equipment does radiate radio frequency energy while in the active test mode Referenced Safe...

Page 11: ...e Ray Tube CRT is the location where the tester displays test information At the Top menus corresponding to the four function keys above the CRT are shown The main portion of the screen displays the waveforms being measured and or recalled with corresponding graticules for reference The bottom portion shows the volts division for the waveform the name of the test on display and the micro seconds d...

Page 12: ...Interlock is disabled when this function is selected and the Footswitch is depressed AUX The auxiliary position is for use with a 30kV Power Pack The display will also show wave patterns from accessory units in this position Surge This position selects the Surge Test The name of the test and the microseconds per division measured is displayed on the lower portion of the CRT for reference A digital...

Page 13: ...ern 15 Leads energized indicator light This indicator light will illuminate when voltage is applied during a test V fast up When pressed this control will increase the applied voltage to a motor at an increasing rate of approximately 1000V second V slow up When pressed this control will increase the applied voltage to a motor at a slower but still increasing rate of 33 3V second V slow down When p...

Page 14: ... 4 Seconds Div or micro Amps Div Setting Seconds division is displayed here during Surge Testing The micro amps division setting is displayed here during HiPot Testing Safety precautions for setup There are no ventilation requirements The unit is intended for use in Installation Category II Portable Equipment areas and pollution Degree II Environments where occasional non conducting condensing pol...

Page 15: ...ly upon power up on and assures a positive ground is available to the tester If the instrument is not properly grounded the Open ground indicator will light and testing cannot proceed Check the supply to the tester broken ground bad extension cord excessive ground to neutral voltage and assure that a low impedance ground is provided to the unit If the instrument does not appear to be working prope...

Page 16: ...Instrument Overview 2 24 2010 71 018 V11 EN D12R D6R D3R Users Manual 16 ...

Page 17: ...sually low megohm value when compared to previous measurements or industry accepted limits for the type of insulation in the motor If a low megohm value is measured the motor should be inspected for ground wall insulation damage Some part of the ground wall insulation has failed Possible problems include 1 slot liner insulation or enamel wire insulation may be burned or damaged 2 the motor might b...

Page 18: ...ivation for even doing the DA test is to reduce the test time to 3 minutes instead of 10 minutes for the PI test when the PI test may not be worthwhile To date there are no accepted values for the DA However some usefulness can be obtained by trending the DA value over time 5 DC HiPot test A DC HiPot test is performed using a test voltage that is substantially higher than the Megohm Test but once ...

Page 19: ...2 1372 1029 575 469 1643 1232 600 490 1715 1286 2300 1878 6573 4930 4160 3397 11888 8916 6900 5634 19718 14789 13800 11268 39437 29578 IEC 34 15 V Line Per Unit 1 2 x 50 4E 5000 0 2us 65 480 392 6920 4498 575 469 7300 4745 600 490 7400 4810 2300 1878 14200 9230 4160 3397 21640 14066 6900 5634 32600 21190 13800 11268 60200 39130 Baker Instrument Company an SKF Group Company V Line Per Unit In Servi...

Page 20: ...achines IEEE 429 1972 Evaluation of Sealed Insulation Systems for AC Electric Machinery Employing Form Wound Stator Coils IEEE 432 1992 Guide for Insulation Maintenance for Rotating Electrical Machinery 5hp to less than 10 000hp IEEE 434 1973 Guide for Functional Evaluation of Insulation Systems for Large High Voltage Machines IEEE 522 1992 Guide for Testing Turn To Turn Insulation on Form Wound S...

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