isolatieweerstandsmeter

An isolatieweerstandsmeter, also known as an insulation tester or megohmmeter, is an electrical instrument used to measure the electrical resistance of an insulator. This resistance is a measure of how well the material prevents the flow of electric current. High insulation resistance indicates a good insulator, while low resistance suggests that the insulating material may be damaged, contaminated, or breaking down, potentially leading to electrical faults or safety hazards.

These meters typically operate by applying a high DC voltage to the insulation being tested and then measuring the resulting small current flow. According to Ohm's Law, resistance is voltage divided by current. The higher the applied voltage, the more sensitive the meter can be in detecting even small leakage currents, which translates to higher measured resistance values. Common test voltages range from 50 volts to 5000 volts or more, depending on the application and the expected insulation quality.

Isolatieweerstandsmeter are essential tools for electrical maintenance and safety checks. They are used to assess the integrity of insulation in electrical equipment such as motors, transformers, cables, and switchgear. Regular testing helps to identify potential problems before they lead to equipment failure, fires, or electric shock. They are also used in the commissioning of new electrical installations to ensure that the insulation meets required standards.