Why Should You Use Insulation Testers for Electrical Equipment Maintenance?

What Is an Insulation Tester? An insulation tester is a specialised electrical instrument used to measure the insulation resistance of electrical circuits, components, and systems. It plays a crucial role in ensuring the safety and performance of electrical installations by identifying any insulation breakdowns or potential leakages. Insulation resistance is typically measured in megohms (MΩ), and a higher value signifies better insulation quality. Unlike a traditional multimeter, an insulation tester applies a high-voltage DC signal—usually between 250V and 5kV—to determine the amount of leakage current flowing through the insulation. This makes it an ideal tool for detecting flaws that could lead to equipment failure or safety hazards. What Makes Insulation Testing Important? Electrical systems operate under various environmental conditions, including heat, humidity, and mechanical stress. These factors gradually degrade insulation materials, increasing the risk of e...