What is blocked rotor test?

A blocked rotor test is a diagnostic procedure used to assess the performance and condition of electric motors, particularly induction motors. During this test, the rotor is prevented from rotating while the motor is energized, allowing for the measurement of current and voltage under these conditions. The results help determine parameters such as the motor's starting torque, rotor resistance, and other electrical characteristics. This test is crucial for identifying potential issues related to motor efficiency and reliability.