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Haruto Tanaka
Haruto Tanaka
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Haruto TanakaMember
Field replacement of small pole units may take hours; substation power transformers may require days to months if spare units and logistics are involved.
January 26, 2026 at 9:24 pm in reply to: what is the function of buchholz relay in power transformer? #332121Haruto TanakaMemberA Buchholz relay is a gas and oil operated protection device installed in the pipe between main tank and conservator of oil filled transformers. It detects internal faults such as winding short circuits, core faults or severe oil discharges. Slow gas accumulation from minor faults triggers an alarm, while a sudden oil surge caused by a major fault operates a trip contact. The relay provides early warning of developing problems and fast tripping for serious internal failures, thus limiting damage to the transformer and enhancing overall system safety.
January 26, 2026 at 3:45 pm in reply to: Why is periodic oil testing essential for transformers power line units during maintenance? #332077Haruto TanakaMemberOil testing verifies dielectric strength, moisture, acidity, inhibitor content, and gas formation. Prevents failure and extends operational life.
January 25, 2026 at 1:01 pm in reply to: How do power transformers convert electrical energy between voltage levels? #331857Haruto TanakaMemberThrough electromagnetic induction. Turns ratio defines voltage conversion; current adjusts inversely to conserve apparent power minus losses.
January 24, 2026 at 2:18 am in reply to: Why do solar power plants require step-up transformers? #331575Haruto TanakaMemberPV inverters output medium voltages unsuitable for long-distance transfer. Step-up transformers raise voltage to transmission or sub-transmission levels, enabling grid integration and reducing I²R losses.
January 23, 2026 at 11:28 pm in reply to: How do transformers transform power between voltage levels? #331553Haruto TanakaMemberPower transformers shift voltage up or down while conserving kVA, enabling long distance transmission and local consumption.
January 23, 2026 at 3:30 pm in reply to: How is power transformer sizing calculation performed for grid loads? #331494Haruto TanakaMemberPlanners model load growth, redundancy (N-1), fault levels, and voltage regulation to select kVA and impedance.
January 23, 2026 at 2:29 pm in reply to: How is transformer power factor calculation performed? #331484Haruto TanakaMemberPF is measured from real vs apparent power; at light load magnetizing current reduces PF, improving as load increases.
January 23, 2026 at 6:58 am in reply to: What applications use medium voltage power transformers? #331409Haruto TanakaMemberMV transformers connect distribution feeders to commercial buildings, industrial complexes, and microgrids requiring 3.3-35 kV service levels.
January 23, 2026 at 6:42 am in reply to: Where is a medium voltage control power transformer used? #331407Haruto TanakaMemberMV control transformers supply low-voltage control circuits for switchgear, protection relays, contactors, and SCADA systems within substations and industrial plants.
January 23, 2026 at 1:56 am in reply to: How does a manufacturer of power transformer evaluate performance before shipment? #331371Haruto TanakaMemberManufacturers conduct routine and type tests per IEC/IEEE: ratio, polarity, impedance, no-load and load losses, temperature rise, lightning and switching impulse, partial discharge, and applied/induced voltage tests. Successful results validate insulation, thermal, and electrical performance.
January 22, 2026 at 9:43 pm in reply to: Which industries require a large power transformer manufacturer? #331339Haruto TanakaMemberLarge manufacturers are essential for sectors that need high-MVA, high-voltage transformers: national and regional utilities, interconnectors, HVDC projects, big generation plants (thermal, nuclear, hydro), large mining operations, steel mills, mega-refineries, and large data center campuses. These clients require engineered-to-order units, complex testing, long-term support, and fleet-level condition monitoring, which only major OEMs or specialized heavy-industry manufacturers can provide at scale.
Haruto TanakaMemberkVA ratings depend on permissible current, voltage, temperature rise, cooling class, and insulation capability. Ratings must support continuous loading without exceeding thermal limits.
January 22, 2026 at 4:23 am in reply to: Can the TSS be used with equipment from manufacturers other than GlobeCore? #331149Haruto TanakaMemberYes. One of the core advantages of the TSS is its independence – it is designed to integrate with oil processing units made by other manufacturers as well as GlobeCore equipment. This interoperability makes it suitable for a broad range of transformer service environments where diverse equipment may be deployed.
January 22, 2026 at 1:23 am in reply to: What does a power transformer testing PDF typically cover? #331105Haruto TanakaMemberIt covers detailed commissioning workflows, test parameters, IEC/IEEE tolerances, and maintenance recommendations for field personnel during energization and early operation.
January 21, 2026 at 8:02 pm in reply to: What are the typical industries or applications that benefit from US-6S drying? #331028Haruto TanakaMemberIndustries that rely on robust power supply and long equipment life-such as power utilities, oil & gas, telecommunication networks, transportation (traction systems), and heavy industry-benefit from US-6S drying. It ensures transformers are moisture-free before installation or after repair, improving reliability in demanding operational environments.
January 21, 2026 at 3:51 pm in reply to: Is training or certification ????????????? for operators who will work with LFD? #330962Haruto TanakaMemberYes, training is strongly recommended and often mandatory for operators working with LFD systems. Although there is usually no formal international “certification” for LFD, manufacturers typically provide specialized training covering electrical safety, current control, temperature monitoring, and vacuum operation. This is important because LFD involves high currents and high temperatures, and incorrect setup can damage insulation. In practice, only trained personnel should run the process to ensure safety and repeatability.
January 21, 2026 at 2:02 pm in reply to: What defines a power transformer in electrical engineering? #330935Haruto TanakaMemberIn electrical engineering, a power transformer is a static device that transfers AC electrical power between circuits at different voltage levels through electromagnetic induction, without changing frequency. It is characterized by its kVA/MVA rating, voltage class, insulation system, impedance, and cooling method. Power transformers are primarily used in transmission and distribution systems, industrial plants, and large-scale power conversion, as opposed to small signal or instrumentation transformers used for measurement and control.
Haruto TanakaMemberIn typical TOR-5 implementations, the system continues to operate autonomously even if the connection to the server is temporarily lost. The local controller keeps measuring and storing all parameters in its internal memory, so no diagnostic information is lost during communication outages. Once the connection is restored, the buffered data are transmitted to the server and added to the historical trends. The display on the server side may pause or freeze, but the measurement process itself is continuous and independent of on-demand data requests.
January 20, 2026 at 5:01 am in reply to: What steps are involved in the construction of a power transformer? #330466Haruto TanakaMemberCore fabrication, coil winding, insulation assembly, tank fabrication, auxiliary systems (radiators, pumps, fans), OLTC integration, oil filling, testing, and finishing.
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