DCresistansmätningar

DCresistansmätningar, also known as DC resistance measurements, are a fundamental electrical testing procedure. These measurements determine the direct current resistance of a component or circuit. The primary goal is to assess the integrity of conductive paths, identify potential faults, and verify material properties. For example, in electrical equipment like transformers, motors, and switchgear, DC resistance measurements are crucial for ensuring proper winding continuity and detecting issues such as loose connections, damaged insulation, or short circuits. The measurement is typically performed using a low-voltage DC current source and a sensitive voltmeter or a dedicated ohmmeter. The resistance is calculated using Ohm's Law, where Resistance (R) equals Voltage (V) divided by Current (I). Accurate DC resistance measurements can provide valuable insights into the condition of electrical assets, aiding in predictive maintenance and preventing failures. Temperature is a significant factor influencing resistance values, so measurements are often corrected to a standard temperature for comparison over time or between different units. These tests are a simple yet effective diagnostic tool in electrical engineering and maintenance.