Rotor Lab

Temperature indicating paints allow a technician to visually inspect a rotor for locally isolated temperature variation.

Test Procedure While the motor is in an assembled/disconnected state, apply low voltage single phase power to any two of the motor leads and slowly rotate the shaft. While rotating the shaft, observe an ammeter

Test Overview During a DLRO test, resistance measurements are taken across single rotor bars and then evaluated (relative to other bars from the same rotor) for values above an acceptable range.  Test Deficiencies Although DLRO

Test Overview A rotor rated flux test or high-current excitation test, often performed with a core tester acting as the power source, can be administered with some degree of success for detection of major rotor

Test Overview A growler test, utilizing magnetic viewing film, can help a technician visualize the bars of a rotor. This test utilizes a portable growler for exciting the rotor and magnetic field viewing film for