Insulation Resistance Testing

Tests the resistance of insulation materials to ensure electrical safety and prevent leakage currents. Insulation resistance testing measures how effectively electrical insulation resists current flow. The test applies a high DC voltage (typically 250V to 1000V or more) across the insulation and measures leakage current. The resulting resistance value, in megaohms (MΩ), reflects the insulation’s ability to isolate electrical components.

This test is commonly used in commissioning, routine maintenance, and troubleshooting to prevent arc faults, shorts, and equipment failures.