Megger PPX30, User Manual, Page: 29 / 84

4 — Using Power Packs with Baker AWA Testers
The Baker AWA-IV 6 kV and 12 kV analyzers can be used with the Baker PPX30 power packs to test high-voltage
motors that are beyond the capabilities of the testers alone. Generally speaking, the Baker AWA-IV 12 kV analyzer
can test motors up to 1000 HP, 4160 volts, 1800 RPM on its own. Power packs extend the tester’s capability.
Power packs cannot be used alone to test motors; the control functions of the Baker AWA-IV are required.
Review and clearly understand the instructions for stand-alone operation of the Baker AWA-IV before attempting to
operate the device with a power pack.
CAUTION: High voltage is activated when using this product. Ensure that all personnel are away from the device
under test and not in contact with the load or test leads.
For user safety, ensure that the analyzer is connected to a winding load before activating the tester.
WARNING: Some test leads will be open during the test and can be at the same voltage potential as the
winding! To avoid severe injury or death, all precautions should be taken to avoid touching these leads!
NOTE: The ground fault system on the Baker AWA-IV will render it inoperative without a proper ground. When the
host analyzer is connected to a power pack, an inoperable condition will also affect the power pack due to loss of
the surge enable signal.
Combining Baker AWA-IV Host and Power Pack Tests
To completely test a large motor, functions from both the Baker AWA-IV host and the power pack are used together.
The Baker AWA-IV host is used to perform the winding Resistance, Megohm, and PI tests. The power pack is used to
perform the HiPot and Surge tests. The test data collected by both instruments are then combined into a single test
record in the database.
For this example, a 6600-volt 1785-RPM motor will be tested at 6000 volts for the Megohm/PI test and 14200 volts
for the HiPot and surge tests. Both a new Motor ID and a new Test ID will be created.
Because this is a large slow motor, the Baker AWA-IV 12kV will not be able to reach the surge or HiPot test voltage
(14200 volts) by itself, so the power pack will have to be used.
Briefly, the procedure will be to:
„ Create a new Test ID (if one does not exist for the test voltages needed for the motor).
ƒ
Enable power pack functionality. When testing with a power pack and a Baker AWA in automatic mode, the
tester directs the use of appropriate leads and proper power pack operations.
„ Create a new Motor ID.
„
Perform the tests with the Baker AWA-IV doing the resistance, Megohm/PI tests, and the power pack doing the
HiPot and Surge tests.
Using Power Packs with Baker AWA Testers
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