Insulation resistance measurements, obtained using a megohmmeter (commonly known as a “Megger”), assess the effectiveness of electrical insulation in preventing current leakage. Readings indicating high resistance signify effective insulation, preventing stray currents and ensuring safe operation of electrical equipment. For instance, a motor winding exhibiting a resistance reading in the megaohm range is typically considered properly insulated. Conversely, low readings suggest compromised insulation, posing potential safety hazards and performance issues.
Validating insulation integrity through these tests is critical for electrical safety and equipment longevity. Preventing insulation failure minimizes risks such as electric shock, equipment damage, and fires. Historically, these tests have played a crucial role in enhancing electrical system reliability, evolving alongside advancements in insulation materials and testing technologies. Their use remains a cornerstone of predictive maintenance programs, enabling proactive identification and rectification of potential insulation weaknesses before they escalate into costly failures.
