Insulation resistance testing system

resistanceground bondHipot

Complete testing of electric motors at the end of line. A safety and function test is necessary at the end of line for the 3-phase motors following production. The requirement was a turnkey solution including workplace design and programmable power source. For the stalling test, the DUT must be mechanically held in place by applying large forces on the shaft. Moreover, high power must be supplied to the DUT, which should be programmable over the entire range from the PC. In addition, the system should easily be integrated into the existing production lines worldwide. Solution The high power required by the DUT required appropriate structures for the mechanical set-up. Therefore, a workplace design with 3 automatic doors, which moved upwards was chosen. This allowed saving of a lot of space, which was of great importance for integration into existing production lines. The test equipment was set up, separated from the workplace. Due to the high performance the power supplies were big and heavy. The heavy DUT come with workpiece carriers in the testing area and are then electrically connected by hand. For stalling measurement, the motor shaft is automatically fixed. The PC controls the freely programmable test processes with the standard software DAT. The following tests are available: • Ground bond test • Hipot (phase, body, sensors etc.) • Insulation resistance • Winding resistance • Withstanding voltage test • 1/3 phase no-load test • Stall current test with mechanical stalling of the shaft • Brake test The "OK" result is put out together with the motor data to a label printer. This label is also the seal of quality.