Single-Coil Testing Using A Test Reference - Megger Baker AWA-IV User Manual

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Single-coil Testing Using a Test Reference

This application involves setting up a new Test ID that will include a test reference waveform for comparison. The test
reference is used during the immediate testing process and will be saved to re-use when testing other devices of this
type in the future. Using a test reference ensures that all devices of the same type are measured against a known-
good coil, establishing a consistent baseline for comparison.
1. Connect the high-voltage test leads to a known-good coil as described in the table below.
Table 4: AWA-IV high-voltage test lead connections to device under test for single-coil Surge testing;
reference coil.
Test Lead 1
Coil lead 1
Setting up the Test ID
1. Create a separate Test ID and a Motor ID to use during the testing process. The Motor ID and Test ID can then
be re-used when testing other devices of this type. Refer to "Creating a Test ID" on page 84 and "Creating a
Motor ID" on page 88 for details on these processes.
2. For this example, the initial Test ID setup includes parameter settings as shown in the figure below.
3. Ensure that your test parameters are properly set up for the coil type you are testing.
4. Check L-L EAR box and set your tolerance as needed. We use 3% in this example, which is a commonly used
tolerance for coil comparison testing.
5. Check the P-P EAR box and set a tolerance that will allow for a slow, but practical ramping speed.
6. For this example, because we are testing 460-volt coils, we set a Surge Value of 2000 volts.
7. Notice that the
Test-REF
8. When the settings have been defined, click on Close.
9. In the Tests tab, click on Save then uncheck the Edit Test ID box to complete the initial Test ID setup.
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Test Lead 2
Coil lead 2
Fig 116: Creating Test ID; setting initial Surge Test parameters.
and
EAR(%)
elements are grayed out (inactive at this time).
Test Lead 3
Not Connected
Test Procedures
Ground Lead
Not Connected
107

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