Insulation resistance measurement

Insulation resistance measurement is a test of the insulation condition of cables, wires, and electrical equipment using a megohmmeter. These tests determine whether the insulation meets safety requirements and whether the electrical installation is suitable for further operation.

Measurements are taken during commissioning of electrical installations, after installation or repair, and during periodic testing. Before commencing work, the electrical installation is disconnected from power, after which specialists perform measurements with a megohmmeter at a test voltage appropriate for the type of equipment.

During the test, specialists:

✔ disconnect and prepare the electrical installation for testing;
✔ measure the insulation resistance between the required circuits;
✔ analyze the obtained readings;
✔ if necessary, identify areas with damaged or deteriorated insulation;
✔ prepare a test report with the measurement results and a conclusion on the electrical installation’s compliance with established requirements.

Based on the test results, the actual insulation resistance is determined and its compliance with regulatory requirements is assessed. If deviations are detected, areas requiring repair or replacement are identified.

After completion of the work, an insulation resistance measurement report is prepared, which specifies the test object, the measured values, the instrument used, and a conclusion on the electrical installation’s compliance with regulatory requirements.