Baker AWA IV Field Testing
Baker AWA IV Field Testing
The SKF Static Motor Analyzer – Baker AWA-IV series of electric motor analyzers are fully-automated, user-programmable instruments that deliver reliable testing of motors with repeatable results, regardless of user. These easy-to-use instruments perform a wide range of electrical tests, including surge, DC Hipot, step voltage, continuous ramp, meg-Ohm and winding resistance tests. The newest version of the AWA features continuous ramped step-voltage, enhanced reference surge waveform, improved PI/DA test, improved DC hipot, improved resistance test, more sensitive surge test.
Computer control and waveform monitoring are enhancements above manually controlled instruments. As with the DC HiPot test, the Baker AWA-IV begins surge generation at low voltage. Each pulse applied to the winding is digitized and the resultant waveform is compared to previous waveforms to detect any signs of turn-to-turn weaknesses.
Comparison is done by the patented Pulse to Pulse Error Area Ratio (PP-EAR) technique. This method is sensitive to less than a one percent variance between coils. In addition, shorts among windings in parallel can be located, something that was never possible before by visually comparing waveforms.
With the Baker AWA-IV, fewer pulses are applied to the winding, reducing the power required to perform the surge test. Since each and every pulse is analyzed, it becomes the new reference waveform as test voltage is increased up to the specific withstand level. If no turn-to-turn weakness is detected, the final pulse waveform is stored as the reference waveform for all subsequent tests. (skf.com)