Electric Motor Testing & Vibration Analysis in Pakistan.
TransfoLine delivers certified Electric Motor Testing, Dynamic Load Analysis, and Vibration Spectrum Diagnostics across Pakistan for Low-Voltage (415V) and High-Tension (3.3kV, 6.6kV, 11kV) industrial induction motors. Using high-frequency surge testers, MCSA analyzers, and multi-channel FFT vibration meters, we prevent unexpected production downtime and verify motor rewinding quality.
What is Electric Motor Testing & Vibration Diagnostics?
Electric motor testing encompasses static electrical diagnostics (surge testing, winding resistance, polarization index) and dynamic online evaluations (vibration FFT spectrum, MCSA current signature, full-load thermal rise) to detect turn-to-turn insulation degradation, broken rotor bars, mechanical unbalance, and bearing faults before catastrophic motor burnout.
Turn-to-Turn Surge Comparison
Standard Megger tests only find direct ground faults. Our IEEE 522 surge test injects steep wavefront pulses to expose turn-to-turn and phase-to-phase micro-defects within stator coils before winding failure occurs.
Dynamic FFT Vibration & Bearing Analysis
Accelerometers measure velocity (mm/s RMS) and high-frequency acceleration across bearing housings to pinpoint misalignment, unbalance, looseness, and inner/outer race bearing fatigue.
Electric Motor Diagnostic Tests We Perform
ISO 10816-3 Motor Vibration Severity Classification
| Condition Zone | Medium Motors (15kW – 300kW) | Large HT Motors (> 300kW) | Machine Operational Status |
|---|---|---|---|
| Zone A (Good) | ≤ 1.4 mm/s RMS | ≤ 2.3 mm/s RMS | Newly commissioned or completely refurbished motor |
| Zone B (Acceptable) | 1.5 – 2.8 mm/s RMS | 2.4 – 4.5 mm/s RMS | Continuous unrestricted long-term industrial operation |
| Zone C (Restricted) | 2.9 – 4.5 mm/s RMS | 4.6 – 7.1 mm/s RMS | Schedule maintenance overhaul and bearing replacement |
| Zone D (Unacceptable) | > 4.5 mm/s RMS | > 7.1 mm/s RMS | Immediate shutdown to prevent shaft or winding destruction |
Frequently Asked Questions.
Technical advice on electric motor predictive maintenance.
ON-SITE Can motors be tested on-site without decoupling from the load?
Yes. Vibration analysis, online MCSA, and thermal imaging are performed directly under normal operating load without decoupling. Static surge and winding tests are performed during scheduled plant downtime directly from the MCC panel terminals.
REWINDING QC Do you perform quality control testing on newly rewound motors?
Yes. We perform rigorous post-rewinding acceptance testing including surge comparison (IEEE 522), no-load current balance, high-potential withstand, and full vibration spectrum validation.
Book Electric Motor Testing.
Our motor diagnostic engineers deploy nationwide across Pakistan.
Need on-site motor vibration analysis, HT motor surge testing, or post-rewind acceptance testing? Contact us directly.