Baker D30R User Manual - page 4
Table of Contents
12/3/2009 | 71-022 V6
D30R
4
Full DC testing of a motor....................................................................................................................31
Performing only a Megohm test.....................................................................................................34
Performing only DC over voltage test (DC HiPot test) ....................................................................34
Sample data showing good & poor insulation ..................................................................................35
Storing the test results in memory ....................................................................................................35
Using the footswitch..............................................................................................................................35
The HiPot over current trip indicator.................................................................................................35
Effects of temperature .........................................................................................................................36
Step Voltage test ...................................................................................................................................36
Step Voltage test procedure ................................................................................................................36
6........................................................................................................................................................................39
Principles and theory of Surge testing .......................................................................................................39
Principles of Surge testing...................................................................................................................39
Surge testing theory .............................................................................................................................39
Determination of a fault .......................................................................................................................40
Motivation for Surge testing................................................................................................................41
Contact bounce ......................................................................................................................................41
Lightening strikes ..................................................................................................................................41
Inverter transients.................................................................................................................................41
Line surges .............................................................................................................................................41
IGBT switching technology...................................................................................................................42
7........................................................................................................................................................................43
Performing Surge tests.................................................................................................................................43
Surge test display..................................................................................................................................43
Other Important Safety warnings .......................................................................................................44
General notices ......................................................................................................................................45
Surge test setup ....................................................................................................................................45
Three phase motor check list ..............................................................................................................46
Single coil surge test and set-up ........................................................................................................47
Example: Comparison to a master coil ..........................................................................................49
8........................................................................................................................................................................51
Surge test applications..................................................................................................................................51
Other Important Safety warnings .......................................................................................................51
Maintenance testing..............................................................................................................................52
Determination of a fault .......................................................................................................................53
Open Circuits ..........................................................................................................................................53
Form coils ...............................................................................................................................................54
Notes and tips for form coils...........................................................................................................54
Three phase motors..............................................................................................................................54
Two or more single coils ......................................................................................................................55
Notices for two single coils ..............................................................................................................55
Wound rotor motors.............................................................................................................................55
Synchronous motor/generator............................................................................................................56
Faults in synchronous motor/generators ..........................................................................................56
Pole piece fault ..................................................................................................................................56
Stator winding fault ..........................................................................................................................56
Chiller motor testing .............................................................................................................................56
Field coils ................................................................................................................................................56
Armatures...............................................................................................................................................56
Bar-to-bar surge test ......................................................................................................................57
Span testing .......................................................................................................................................57
Determination of a fault...................................................................................................................58
Notes and tips for span testing armatures ...................................................................................58
Testing large AC stators/motors .........................................................................................................59
Notes and tips for large AC stator/motors....................................................................................59
Rotor loading (coupling) when testing assembled motors..............................................................60
Testing assembled motors from the switchgear ..............................................................................60