SV500 monitors three-phase induction motors. Failure impacts and diagnostic indicators are listed below.
Input voltage
- Failure impact
- Equipment malfunction, accelerated motor degradation
- Diagnostic indicators
- Voltage RMS, crest factor, voltage imbalance, THD
Rotor
- Failure impact
- Higher vibration and noise, accelerated bearing wear
- Diagnostic indicators
- Current spectrum frequencies, static and dynamic eccentricity frequencies
Stator
- Failure impact
- Lower efficiency, phase imbalance, heat, vibration and noise
- Diagnostic indicators
- Park vector analysis, current spectrum, current imbalance
Noise and vibration
- Failure impact
- Electrical and mechanical stress, reduced insulation and structural integrity
- Diagnostic indicators
- Noise bands in voltage and current spectra, spectral instability
Overheating
- Failure impact
- Motor degradation, shorter life, lower efficiency
- Diagnostic indicators
- RMS current, harmonic and distortion indices, DC components
Cable connections
- Failure impact
- Higher resistance, voltage drop, overheating, arcing
- Diagnostic indicators
- Phase current imbalance, resistance imbalance
Bearings
- Failure impact
- Higher vibration and noise, stator-rotor contact damage
- Diagnostic indicators
- Rolling and journal bearing defect frequencies
Torque ripple
- Failure impact
- Higher vibration and noise, accelerated bearing wear
- Diagnostic indicators
- Positive and negative sequence components, torque stability