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Surge Comparison Tests
What Is It Used For?
The surge comparison test is used to find shorts and insulation weaknesses in coils, windings, electric motors, generators, alternators and transformers. These faults are typically turn to turn, coil to coil, or phase to phase. Other problems found include wrong internal connections, wrong turn counts, and more for DC motors. Weak turn to turn insulation is the start of most winding failures. Because it is the only test that can find weak insulation at elevated voltages, the surge comparison test is important for motor reliability and maintenance programs, for diagnosing problems and for quality control. It is an especially powerful tool in combination with Partial Discharge measurements. Surge tests are done on individual coils, stators, wound rotors and fully assembled motors and generators without the need to turn the rotor. |
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