Electrical equipment in service undergo different types of stress related to the operation in itself; insulation, humidity, contaminants, vibrations, electro dynamic stress, aging, close failures, differential dilatations, partial wearing out, discharge of grooves and surfaces on the coil heads, operations under excessive voltage and power demand, looseness of wedges, atmospheric impulsive over tensions.

Controls:
Current spectral analysis

Detection capacity:
Rotoric asymmetries (Bars breakage)
Detection of cracks and bars breakage in the rotoric circuit with a diagnostic accuracy over 90%:
Eccentricities : detection of non uniform gap
  - Oval shaped rotor
  - Oval shaped stator
  - Shaft displacement

Other controls:
Measurement of insulation resistance
Surge Test and Highpot test
Measurement of polarization index
Measurement of delta capacity and tangent
Wound measurement
Measurement of grounding
Measurement of partial discharges


Detection capacity:
Insulation Resistance
Detection of insulation failures through the application of a continuous tension and monitoring of circulating current.
Polarization Index and dialectric absorption
Detection of humidity, contaminants and windings insulation impairment.