SKF AWAIV-12, User Manual

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Coil resistances
As discussed above, the resistance measurements made by the Baker AWA-IV are a user-
configured series or a parallel combination of coils. At the end of a resistance test, the Baker
AWAIV will calculate and display the coil resistances; if a temperature has been entered, it will
also report those values. These values are found in the right-hand column of numbers in the
Resistance window. The calculation involves numerically solving for the coil resistances given
the type of winding (Wye or Delta) and the measured balance values.
Under some circumstances, the algorithm fails. In such cases, the Baker AWA-IV will indicate
that it cannot find a solution given the balance resistance values.
DC Tests: Meg-Ohm/PI/DA/ HiPot/Step or Ramp Voltage test window
The DC Tests window is displayed when the Meg-Ohm, PI, DA, or HiPot voltage buttons are
clicked on in the Tests view.
Figure 44. DC tests.
Think of all these tests as a single type of test. The Meg-Ohm test is the first test to be run,
followed immediately by a PI test, and then a HiPot test. There are two dropdown lists for PI
and HiPot. This is where the DA only, Revert DA, Ramp-Voltage and Step-Voltage tests are
located. Therefore, a single setup window for these three tests is used to configure each test.
The left half of the window is where test voltages, minimum Meg-Ohm readings, voltage
ramp rate, test times, current trip settings, discharge times, and minimum PI values are all
entered. The PI has two extra options: 1) default to the Dielectric Absorption if the
IR=5000MΩ at 1 minute and 2) the Dielectric Absorption test only. The PI test has many
subtleties; these two options let you set up the tests so that no unnecessary time is spent on
the PI test.
46 SKF Static Motor Analyzer—Baker AWA-IV User Manual
Baker AWA-IV software overview