Data tab—Surge view. 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 software overview

Data tab—Surge view

The Surge view shows a thumbnail view of the surge waveforms for a particular test along with basic test results and controls for viewing graphs in more details.

Figure 49. Data tab— Surge view showing test results.

Click on the Enlarge button to view the surge waveforms more closely. The waveforms can be viewed in two ways as the next examples illustrate.

In a comparison view, all waveforms for all leads can be superimposed on each other. You can select each lead for display if needed.

Figure 50. Enlarged Surge view—all waveforms in comparison.

In enlarged view, you can hold down the left mouse button and drag a box around an area of the screen to zoom in on the area. You can also use your finger to draw the box around the area you want to zoom in on.

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

Baker AWA-IV software overview

In a nested view, waveforms for a single selected lead at the 1/3, 2/3, and full voltage are superimposed.

Additionally, if the test failed, the previous to fail and the failed waveform will be displayed with the failed waveform being drawn in white.

Figure 51. Enlarged Surge view—waveforms nested.

The Surge view not only displays the surge waveforms for all leads, it also renders a view of the pulse-to-pulse (P-P) Error Area Ratio (EAR).

Click on the EAR Graph button to view the pulse-to-pulse EAR graph. The graph displays the

EAR percentage between successive pulses per test lead and the tolerance used during the test.

The P-P EAR evaluates each pulse of the Surge test to identify weakness in turn insulation.

This test should be used whether the rotor is installed or not; threshold is typically set to 10%.

As the voltage is increased, each surge pulse is digitized and compared to the previous pulse.

If the motor under test has weak insulation, the waveform frequency increases and the software will calculate the difference between the previous to failed waveform and the failed waveform. If it calculates a difference greater than the tolerance set, the test will stop and capture the waveform for analysis and reporting.

Figure 52. Pulse-to-pulse EAR example.

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