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David Lee
David Lee
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David LeeMember
In an ideal transformer, power remains constant because energy cannot be created or destroyed. When voltage steps up, current steps down proportionally, and vice versa. Real transformers introduce losses due to hysteresis, eddy currents, resistance, and cooling systems, so the primary power equals secondary power plus losses.
January 25, 2026 at 6:40 pm in reply to: What qualifications are required for Hyundai power transformers jobs in manufacturing or service? #331898David LeeMemberTypical roles require electrical engineering backgrounds, knowledge of IEC/IEEE standards, factory testing, DGA/PD diagnostics, and field commissioning competencies.
January 24, 2026 at 12:50 pm in reply to: How is power in transformers monitored to prevent overheating? #331669David LeeMemberSensors track oil and winding temperatures, while SCADA trends load, PF, and DGA data to detect stresses early.
January 22, 2026 at 12:28 pm in reply to: What does a power transformer icon represent in schematics or diagrams? #331255David LeeMemberIt represents a step-up or step-down transformer symbolically to indicate voltage transformation, isolation, or phase shift in circuit diagrams.
David LeeMemberHyundai power transformers serve utility transmission and distribution networks, industrial plants, petrochemical facilities, and data center substations.
January 21, 2026 at 4:01 am in reply to: What topics are covered in a power transformer handbook? #330776David LeeMemberHandbooks typically cover design theory, materials, electromagnetic modeling, thermal design, dielectric systems, OLTC mechanics, cooling classes (ONAN/ONAF/OFWF/GF), standards, factory testing, installation, protection schemes, diagnostics (DGA, PD, tan-delta, FRA), maintenance, failure modes, and asset management. Case studies and utility practices are often included.
January 21, 2026 at 12:02 am in reply to: In the mining industry, there is an urgent need to remove metals from wastewater – is the AVS vortex layer device technology capable of working with large volumes? #330718David LeeMemberYes – AVS (vortex layer) technology can be applied to large volumes, but it’s important to think of it as an intensification reactor, not a “single giant filter.” The working zone is very intense, so required residence times are usually short (seconds to tens of seconds), which supports high throughput. Scaling is typically done by larger-flow reactors and, more realistically, by running multiple units in parallel to keep the same hydrodynamics and treatment quality. For mining wastewater, the real volumetric capacity will depend on your chemistry (pH/reagents), solids load, target metals, and the downstream separation step (settling/DAF/filtration), because AVS accelerates reactions but you still need to remove the formed precipitate.
January 20, 2026 at 11:44 pm in reply to: Can the vortex layer device (AVS) technology remove selenium down to the ppb level? This is required for the mining industry – it is currently a major problem. #330714David LeeMemberGetting selenium to ppb is usually less about “stronger mixing” and more about selenium speciation + a polishing step. AVS (vortex layer) can intensify redox/precipitation and improve reagent contact, so it may help as a reaction accelerator in a chemical treatment train (similar to how GlobeCore describes AVS intensifying heavy-metal reduction/precipitation processes). But on its own, AVS is not a selective Se separator. In mining waters, iron co-precipitation works well for selenite, but removes very little selenate, and ppb targets typically require downstream clarification/filtration and often a final “polishing” technology (anion exchange, membranes, etc.). So: Yes, ppb is achievable, but usually with a multi-stage scheme (convert selenate ? selenite, co-precip/filtration, then polishing). AVS can be a useful intensifier in the reaction step-just don’t expect it to be the single device that guarantees ppb by itself.
January 20, 2026 at 7:18 pm in reply to: What causes a power transformer blowing up during fault events? #330651David LeeMemberFault currents, arcing, and rapid thermal/pressure rise in oil lead to tank rupture if protections fail or are delayed.
January 20, 2026 at 9:15 am in reply to: How are power transformer design calculations performed? #330498David LeeMemberDesign calculations address core cross-section, flux density, copper losses, impedance, insulation levels, and thermal rise. Standards and load profiles guide the final design.
David LeeMemberBitumen emulsion storage tanks are available in capacities from 10 to 100 m³ with heating coils, mixers, and temperature regulation.
November 9, 2025 at 9:51 pm in reply to: Need pricing for TOR-100 equipment or information about authorized distributors. #327338David LeeMemberThe TOR-100 oil breakdown voltage tester measures dielectric strength of transformer oils up to 100 kV in accordance with IEC 60156. We will provide pricing, availability, and information about official supply channels.
November 9, 2025 at 7:45 pm in reply to: Would like to request servicing for a CMM-4.0LT device and confirm whether it can be used with turbine or gear oil. #327330David LeeMemberThe CMM-4.0LT unit can process transformer, turbine, and gear oils if viscosity and contamination levels are within standard limits. We can arrange service or provide technical guidance in the preferred language.
November 9, 2025 at 4:36 pm in reply to: Need a transformer oil purification unit suitable for local operation. #327318David LeeMemberThe CMM series purification systems remove moisture, gases, and solid contaminants from transformer oil. Available capacities range from 600 to 12 000 L/h. We’ll provide options and pricing details.
November 7, 2025 at 2:37 pm in reply to: New request for quote for GlobeCore – Model CMM-R2 – Transformer Oil Regeneration Plant #327128David LeeMemberThe CMM-R2 is a compact regeneration plant for 2 m³/h transformer oil processing. It removes acids, sludge, and oxidation products, restoring oil quality. A detailed quotation will be sent shortly.
November 6, 2025 at 7:38 am in reply to: Request for Specifications and Features of Transformer Oil Filtration Equipment #326986David LeeMemberTransformer oil filtration systems by GlobeCore are designed to remove water, gases, and solids. Available models (CMM-0.6 to CMM-12) feature automatic controls, vacuum systems, and stainless-steel piping. Full specifications can be provided upon request.
David LeeMemberThe DGA (Dissolved Gas Analysis) test detects fault gases in oil. Before running the test, oil should be degassed to avoid false results. GlobeCore offers degassing units that prepare oil for accurate DGA readings and extend equipment life.
David LeeMemberShell Turbo 32 is a light-viscosity mineral turbine oil commonly used in compressors, pumps, and turbines. GlobeCore treatment plants remove particulates and water, extending the oil’s lifespan.
August 2, 2025 at 4:26 pm in reply to: Transformer me kon sa oil hota hai? (Which type of oil is used in transformers?) #323526David LeeMemberMost transformers use inhibited mineral insulating oils, but esters and silicone fluids are also common in specific applications. GlobeCore purification plants maintain all these oil types, ensuring reliability and extended service life.
David LeeMemberOil filled power transformers need their insulating oils periodically dried, degassed, and filtered to maintain performance. GlobeCore systems handle this process, helping utilities avoid costly replacements and outages.
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