Practical Detection Method of Stator Core Interlaminar Short Circuit for Turbine Generators

Several methods for detecting stator core interlaminar short circuits in turbine generators including the electromagnetic core imperfection detection (EL CID™) and the core loop heating with entire core excitation have been available. They are practical and widely used methods for detecting interlaminar short circuits located on the inner periphery of a stator core including core teeth and slots, but they may be less sensitive to those distant from the inner periphery of the stator core.