Electrical signals analysis

Measuring electrical signals is designed to detect the advent of various faults, for the purposes of condition-based maintenance:

  • faults linked to the network : imbalance, cos Ø, harmonic distortion
  • faults linked to regulation or control : transient, pumping, thyristors
  • stator or rotor electromagnetic faults: short circuit, cracked bar
  • some mechanical faults on the shaft line: coupling clearance, key clearance, cardan fault, exentricity, etc…
  • some faults linked to the process

Various techniques are used depending on the type of measurement performed: network analysers, oscillogrammes of the electrical signals or DynAlim® system which we have developed to deploy the current analyses on motors.

The measuring is carried out using current measuring pliers connected to the CTMO® Elec and the time signals recorded are then automatically demodulated to extract the monitoring indicators.

When an indicator is in alarm mode, analysing the current’s modulation functions makes it possible to specify the nature of the fault as well as how serious it is. Maintenance action can then be proposed in order to solve fault diagnosed.

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