DC resistance testerIt is a specialized instrument used to measure the DC resistance value of electrical equipment. Its core function is to detect the conductivity of windings, cables, switches and other equipment, and to determine whether there are faults such as poor contact and inter turn short circuits. It is widely used in the fields of power and electrical manufacturing.
DC resistance testerThe resolution can usually reach 0.1 micro ohms or less, which is suitable for situations that require high-precision resistance values. Has good stability and can provide reliable test results. It can complete a measurement in a few seconds, improving work efficiency.
Selection Guide:
Current matching degree: Select the appropriate test current gear based on the characteristics of the tested object (such as rated current, reactance size) or testing standard requirements. The larger the capacity of the transformer, the larger the output current needs to be selected, usually taking 10% of the rated current as appropriate. Insufficient current can affect measurement accuracy, while excessive current can easily lead to equipment temperature rise errors.
Measurement accuracy and range: The resistance of power equipment is mostly between 100 micro ohms and 2000 ohms, and equipment with a resolution of 0.1 micro ohms should be selected. At the same time, it is necessary to ensure that the measuring range of the tester covers the resistance value of the tested object.
Anti interference capability: In strong electromagnetic field environments such as substations, the anti-interference capability of the tester is crucial. Choose equipment with a dynamic noise suppression system that can maintain stability under 50kV/m interference, with a repeatability error of less than 0.2%.
Scenario adaptation: Portable intelligent devices are preferred for on-site operations, with a compact and easy to carry design and a large control screen that allows beginners to quickly get started.
Security protection: Built in overcurrent and overvoltage automatic power-off mechanism, ensuring the safety of operators even in high voltage environments.