SKF Baker AWA-IV 12 HO, User Manual

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Step #2: Applications or service problem?
Generally, if a problem is noted only when testing a specific motor/generator or other coil
type, then applications would be involved. See “Applications: What to do first” Please call the
sales department for applications assistance.
If the problem is not associated with any one type of motor/generator, or other coil type, then
service would be involved. See “Service: What to do first”
Applications: What to do first
Review the section on common application problems. Please have basic information about
the analyzer and specific information about the motor being tested available when calling or
faxing to assist sales/support personnel in determining a solution to the problem.
Examples:
• Hp rating
• kW rating
• RPM rating
• Operating voltage and current
• How the item being tested is wound and/or number and type of coils
• Application of motor/generator
In short, all information from the motor nameplate would be helpful. A great tool is a
printout or sketch of the waveforms displayed on the analyzer.
If a FAX is available, send a draft to 970-282-1010, attention: Applications.
Common application problems
There are a few common application-related problems. Please review the following cases.
1) The Baker AWA-IV will not give the desired output test voltage for the apparatus
under test.
1.1 The test motor may be too large for the analyzer being used. The impedance of
the windings may be too low.
1.2 The Baker AWA-IV may be at fault in this case. Do not continue testing until you
contact the SKF product service department.
2) Separation of compared surge wave patterns is seen when surge testing known-
good coils, or brand new motors or windings. Often, separation is seen in all three
comparisons for three phase motors, but to varying degrees.
2.1 Generally, this is caused by unbalanced impedance in windings, which is inherent to
the design. It most commonly occurs in basket or concentric wound motors. The
phases are not magnetically balanced due to different coil lengths.
2.2 When acceptance testing, waveforms that are separated because of improper turn
counts, misconnections, or reversed winding groups may be seen.
2.3 This condition may also be seen in DC fields or rotating poles. Coils being
compared must be tested in identical configurations.
148 PUB CM/I4 71-015 EN V13.2 Static Motor Analyzer—Baker AWA-IV User Manual
Baker AWA-IV troubleshooting