Service: What to do first. SKF Baker AWA-IV 4 kV, Baker AWA-IV 12 kV, Baker AWA-IV 12 HO, Baker AWA-IV Series, Baker AWA-IV 2 kV

Baker AWA-IV troubleshooting

Service: What to do first

Because history has shown that several simple solutions that do not require return of a unit may arise, please perform the following checks.

Open condition display

Note the figure below. Is the surge waveform like this?

Figure 145. Open condition.

If yes, the unit may have at least one broken test lead causing an open condition. In most cases, the test lead that is under test and gives this pattern is the broken lead.

Verify this by pulling on the book/clip assembly of the lead. A broken test lead will stretch. If it does not, repeat this procedure at one foot intervals for the length of the lead. If the leads of the analyzer are good, check the connections and continuity of the test winding.

HiPot display checks

1) The HiPot display shows only the voltage or current bar. One of three problems might exist.

1.1 The item being tested is in fact faulty and has either low insulation resistance or open connections.

1.2 The Baker AWA-IV has an internal problem.

1.3 The analyzer has a test lead problem as shown above for an open condition.

Disconnect the test leads from the motor and isolate the analyzer from any grounded surface.

Reduce the output to minimum and attempt a HiPot test with an open lead condition. Your display should indicate a rising voltage bar. The current bar may rise slightly, but fall back to zero when the output increase is stopped.

150 PUB CM/I4 71-015 EN V13.2 Static Motor Analyzer—Baker AWA-IV User Manual