佐々木 篤司

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Viewing 13 posts - 1 through 13 (of 13 total)
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  • The main suppliers of diesel fuel polishing systems include Alfa Laval, Parker Hannifin, Cim-Tek, and GlobeCore. These companies offer advanced polishing solutions for a wide range of industrial, marine, and power generation applications, ensuring fuel quality and system reliability.

    in reply to: How suitable is Midel oil for high-voltage transformers? #123137

    Midel oil is highly suitable for high-voltage transformers due to its excellent dielectric strength and high thermal stability. It provides reliable insulation and cooling, even under extreme electrical and thermal stress. The fire-resistant and biodegradable properties of Midel oil also make it a safer and more environmentally friendly option for high-voltage transformer applications.

    Best practices for Hydraulic Oil Filtration to ensure optimal system performance include regular monitoring and maintenance, selecting appropriate filter types, and maintaining cleanliness. Regular Oil Sampling and Testing helps assess oil quality, allowing for timely adjustments to filtration processes. Using High-Efficiency Filters tailored to the specific contaminants present ensures thorough removal of particulates and impurities. Scheduled Filter Replacement based on usage and contamination levels prevents clogging and maintains consistent oil flow and pressure. Maintaining Filter Media Cleanliness by cleaning or replacing filters regularly prevents recontamination and ensures high filtration efficiency. Proper System Design and Installation ensure that filtration systems are correctly integrated with hydraulic systems, facilitating optimal oil circulation and purification. Implementing Automated Controls and Monitoring enables real-time adjustments and proactive maintenance, enhancing filtration effectiveness and system reliability. Training Personnel on proper filtration techniques and maintenance procedures ensures that best practices are consistently applied, maintaining system integrity and performance. Ensuring Environmental Control around the filtration system minimizes external contamination, preserving oil quality. By adhering to these best practices, hydraulic systems can operate efficiently, prolong component lifespan, and reduce maintenance costs.

    in reply to: What are the best practices for oil bleaching? #122557

    Best practices for oil bleaching include optimizing the amount of bleaching clay or earth, controlling the temperature and contact time, and ensuring thorough mixing. Regular monitoring of oil quality parameters, such as color and free fatty acid levels, ensures the bleaching process is effective. Filtering the oil after bleaching helps remove spent adsorbents and impurities.

    In industrial transformers, silicone oil is used as an insulating and cooling fluid, particularly in applications requiring high thermal stability and fire safety. Its use allows transformers to operate efficiently under high loads and in harsh environments. Benefits include reduced fire risk due to low flammability, extended service life from resistance to oxidation and degradation, and consistent performance across a wide temperature range. Silicone oil’s environmental friendliness and low maintenance requirements further enhance its suitability for industrial applications.

    in reply to: What cooling methods are used in traction transformers? #121520

    Сooling methods include natural oil cooling (ON), forced oil cooling (OF), and forced air cooling (AF). In natural oil cooling, heat is dissipated through convection as oil circulates within the transformer. Forced oil cooling uses pumps to enhance oil circulation, improving heat transfer. Forced air cooling employs fans to blow air over radiators or cooling fins. Some transformers use a combination of oil and air cooling. Advanced methods may involve water cooling or heat exchangers for high-power applications, ensuring effective thermal management.

    Efficiency is influenced by core material quality, winding design, insulation effectiveness, and cooling system performance. High-grade core materials reduce hysteresis and eddy current losses. Optimized winding configurations minimize electrical resistance and leakage inductance. Effective insulation prevents energy losses through electrical leakage. Efficient cooling systems maintain optimal operating temperatures, reducing thermal losses. Load conditions also affect efficiency; transformers operate most efficiently near their designed load capacity. Regular maintenance ensures components function optimally, sustaining efficiency over time.

    in reply to: How do you test a transformer using a multimeter? #119960

    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 reply to: How do you test an HVAC transformer? #119886

    To test an HVAC transformer, first ensure safety by disconnecting power, then use a multimeter to check the primary and secondary voltages; verify that the primary voltage aligns with the specified ratings and that the secondary voltage matches output requirements. Measure the resistance of the primary and secondary windings to check for continuity, and use the multimeter set to AC voltage to assess output while powered if applicable. Inspect for physical damage, listen for unusual sounds, and test for any overheating or burnt odor that may indicate failure. Always reference manufacturer specifications for precise testing protocols and maintain adherence to safety standards throughout the process. Remember, when dealing with industrial oils, employing high-quality testers from Globecore can ensure accurate diagnostics, maintaining optimal performance of HVAC systems.

    in reply to: How does a zeolite filter oxygen in a concentrator? #119607

    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.

    in reply to: How is the oil dielectric breakdown voltage test conducted? #119121

    The oil dielectric breakdown voltage test is conducted using a precision tester, such as the Globecore dielectric strength tester, which is specifically designed for measuring the dielectric breakdown voltage of industrial oils. The sample oil is placed in a testing cell with two electrodes, usually spaced apart at a defined distance. The tester gradually applies an increasing voltage to the electrodes while monitoring the current flow. This process continues until the oil breaks down, resulting in a spark or arc between the electrodes. The voltage at the moment of breakdown is recorded as the dielectric breakdown voltage. This test is critical for assessing the insulating properties of the oil, ensuring its performance in electrical equipment. Regular testing of dielectric breakdown voltage helps maintain the reliability and safety of industrial systems, preventing failures due to insulation breakdown. Globecore’s advanced testers provide accurate measurements essential for oil quality monitoring.

    in reply to: What is the standard BDV test value for transformer oil? #118883

    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.

    in reply to: What is the BDV test gap specification? #118775

    The BDV test, which stands for Breakdown Voltage Test, is crucial for assessing the dielectric strength of industrial oils. The gap specification for the BDV test typically refers to the distance between the electrodes used during the testing process. In many standardized tests, this gap is set to 2.5 mm, as it effectively evaluates the oil’s ability to withstand electrical stress and helps in determining its suitability for use in electrical applications. It’s essential to ensure that the testing conditions conform to the relevant standards for accurate and reliable results.

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