isoleringsmotstånd

Isoleringsmotstånd is a Swedish term that translates to "insulation resistance" in English. It refers to the electrical resistance of an insulating material. This resistance is a measure of how well a material prevents the flow of electric current. High insulation resistance indicates that the material is a good insulator, meaning very little current will pass through it. Conversely, low insulation resistance suggests the material is not effectively preventing current flow, which can be a sign of degradation or contamination.

Measuring insulation resistance is a critical test in electrical engineering and maintenance. It is used to assess the condition of electrical insulation in equipment such as cables, motors, transformers, and generators. By periodically checking insulation resistance, potential problems like moisture ingress, contamination, or physical damage to the insulation can be detected before they lead to failures, short circuits, or safety hazards. The test is typically performed using a specialized instrument called a megohmmeter, which applies a high DC voltage to the insulation and measures the resulting leakage current. The result is usually expressed in megaohms (MΩ) or gigaohms (GΩ). Standards and guidelines often specify minimum acceptable insulation resistance values for different types of electrical equipment.