Elektriksel İzolasyon Testi Çözümleri

Insulation resistance testing checks the condition of electrical insulation within assets such as transformers, motors, cables, switchgear, and generators. By applying a controlled DC voltage, the test identifies deterioration caused by moisture, contamination, thermal aging, or mechanical damage. This helps maintenance teams detect early signs of degradation and prevent unexpected failures or costly downtime.

The right insulation tester depends on the voltage level you need to apply and whether you require diagnostic data for trending. If your work involves large, high-value assets or tests performed in EHV yards, the S1 series is typically the most suitable choice.

Insulation is affected by its environment and operating conditions. Temperature, moisture, contamination, vibration, and general aging all contribute to changes in insulation resistance. Over time, these factors can reduce resistance and indicate weakening insulation. Conducting insulation tests regularly and comparing results over time allows maintenance teams to identify developing issues early and plan corrective action before failures occur.

The Polarisation Index (PI) compares insulation resistance measured at 1 minute and 10 minutes of test duration. A rising resistance value over time indicates healthy insulation, while a low or unstable PI can indicate moisture, contamination, or insulation breakdown. Megger’s PI Predictor™ feature helps technicians estimate the final PI value early in the test, saving time during routine or outage-critical testing.