For decades, pulp and paper plant personnel have performed insulation resistance tests with handheld megohmmeters to prevent motor failures that can lead to unplanned shutdowns and re-winding repairs.

In a perfect world, electrical insulation would allow no current to flow through it. Unfortunately, several factors can — and will — result in the deterioration and ultimate failure of electrical ...

Abstract: This paper presents a comprehensive study on the electrical testing of a turbine generator. The aim is to assess the condition of the generator's insulation system and overall electrical ...

Historically, generator inspections require rotor removal (Figure 1). There’s a significant level of risk during this process due to possible generator damage during the disassembly, and it also ...

Abstract: This paper proposes a method of condition assessment of generator stator winding insulation by simultaneously fitting time variation of Insulation Resistance (IR) and DC Ramped voltage plots ...

Insulation Resistance (IR) test, often called Megger test, is more than 100 years old and assumed to be a very straight forward test. During my inspection and testing work in the past 15 years in ...

Insulation resistance testing is one of the most useful predictive maintenance tests available. This test gives insight into the integrity of insulation. The higher the resistance across the ...

Learn how to test a transformer: insulation resistance, TTR, winding resistance, polarity, continuity, and dielectric checks.