Motor Testing MCA & ESA
The health analysis techniques for your electrical machines: Motors, Generators, Transformers, Drives, Inverters.
Motors and drives do not unexpectedly fail. A fault begins to form, grows, evolves and at a certain point “explodes”.
That’s when the technician intervenes to just say: “The motor has burnt out”.
In reality, the fault did not happen a few moments before. Usually, like almost every breakdown, it started quietly and then progressed.
However, the progression can be detected: production stops and unexpected costs can be avoided.
The diagnosis of electric motors, inverters and others requires specific tools, capable of identifying even the smallest anomalies of the components analysed: these are the MCA & ESA Motor Testing techniques.
An efficient Motor Testing program enables us to:
“Offline” analysis (MCA)
The Offline type of analysis, i.e. MCA Motor Testing is carried out on a de-energised motor, first from the main switchboard and then, if we have any doubts, from the terminal board.
For an even more accurate result, in case of suspected anomaly, we can redo the test by moving the rotor slightly by hand.
MCA Offline Motor Testing Chart showing damage on a stator winding in a “squirrel cage” AC motor.
AT5 PRO All-Test Tool AT5 PRO for MCA “Offline” Test
With the Motor Testing MCA we can check these electric machines in de-energized conditions:
- AC / DC electric motors;
- Generators / Alternators;
- Machine tools;
- Servo motors;
- AC / DC traction motors;
- Measurement transformers;
- Power transformers.
The system allows to analyze a whole series of possible problems in a simpler and deeper way than using a Megger or a Volt/Ohmmeter:
- Ground Faults;
- Short circuits inside the coils;
- Open or defective connections;
- Rotor faults;
- Winding contamination.
A plant cannot “run” if the engine
does not work or works badly.
Motor Testing is the guarantee
for its good functioning.
“Online” analysis (ESA)
The type of analysis Online, i.e. ESA Motor Testing is carried out on an energised motor, from the electrical panel. This allows us to detect other types of defects in motors and electronic components.
The advantage of this method: you do not have to stop the motor and so we can also check the inverter and the most important mechanical components.
ESA Online Motor Testing Graph to check the condition of an inverter’s diodes. In this case everything is fine.
FFT spectrum analysis of the current wave spectrum on the DC motor of a reel winder
All-Test PRO ATPOL II Tool for “Online” ESA Tests
With the Online Motor Testing ESA We analyse and evaluate the entire electronic control and command system during normal operation. In particular:
- AC / DC electric motors;
- Inverters (VFD);
- Generators / Alternators;
- Traction motors;
- Machine tool motors;
- Reduction Gearboxes;
- Pumps and fans;
- Verification of the commissioning condition;
- Failure diagnosis.
We can also perform:
With ESA Online Motor Testing we can aldo identify and trace several potential anomalies, such as:
- Damage to windings;
- Imbalance in phases;
- Broken windings and faulty connections (in conjunction with offline analysis);
- Rotor defects;
- Energy efficiency measurement;
- “Power quality”;
- Control of harmonics presence;
- Inverter verification (diodes, capacitors, IGBT);
- Verification of bearing condition and rotor dynamics (dynamic unbalance or misalignment).
Un impianto non può “girare” se il motore
non funziona o funziona male.
Il Motor Testing è la sua reale garanzia
di funzionamento.