佐々木 篤司

To effectively test a transformer using a multimeter, first ensure the transformer is disconnected from any power source to avoid electrical hazards. Set your multimeter to the appropriate voltage range for testing both primary and secondary windings. Measure the resistance of each winding by connecting the multimeter leads to the respective terminals; a low resistance value indicates a healthy winding. If you need to assess insulation quality, switch to the megohm setting and test between each winding and the transformer core. For checking the voltage output, reconnect the transformer to its power source and measure the output voltage under load conditions, ensuring it meets the specified ratings. Keep in mind, while using these methods provides a basic assessment, for more comprehensive diagnostics including the power factor test on transformer applications, it’s advisable to utilize specialized Globecore testing equipment designed to analyze insulation properties and overall transformer health efficiently. This combination of adherence to safety protocols and utilizing the precise instruments available ensures reliable and accurate transformer performance evaluation.

In an oxygen concentrator, zeolite acts as a molecular sieve that filters oxygen by adsorbing nitrogen from compressed air. The process begins with ambient air being drawn into the concentrator and compressed. The compressed air is then passed through a bed of zeolite material. Due to the zeolite’s selective adsorption properties, nitrogen molecules adhere to the internal surfaces of its micropores, while oxygen molecules are less affected and pass through the bed. The result is an oxygen-enriched gas stream that can be delivered to the user. After the zeolite becomes saturated with nitrogen, the system reduces the pressure, allowing the nitrogen to desorb and the zeolite to regenerate for the next cycle. This pressure swing adsorption process enables continuous oxygen production without the need for chemical reactions or consumable materials.

The standard breakdown voltage (BDV) test value for transformer oil typically ranges from 30 kV to 50 kV, but in certain applications, values can exceed 70 kV, depending on the oil’s quality and treatment. To ensure optimal performance and longevity of electrical equipment, it’s crucial to regularly conduct BDV tests using an appropriate oil bdv test set. This allows for the accurate assessment of the oil’s dielectric strength, identifying any contamination or degradation that may affect the operation of transformers. Regular monitoring helps maintain system reliability and prevent failures caused by electrical breakdown within the oil.