Stator cores are made of thin laminations of magnetic steel separated by insulation to prevent axial currents. If lamination shorts occur, the high temperatures that result can burn stator coil insulation and even lead to melting of stator cores.
Electromagnetic Core Imperfection Detection (EL CID) testing is accepted world-wide for reliable and safe detection of stator core inter-laminar insulation faults.
The only alternative to the Iris Power EL CID Evolution test is the Ring Flux (full flux) test which requires large power supplies, considerable manpower, and expensive infrared viewing cameras.