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Matthew Johnson
Matthew Johnson
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Matthew JohnsonMember
For efficient production of humic fertilizers from peat, leonardite, and vermicompost, I recommend alkaline extraction (KOH/NaOH) with process intensification using the GlobeCore AVS vortex layer device. AVS significantly increases extraction yield by activating particles in an electromagnetic vortex layer and accelerating mass transfer. A typical line is: mixing tank with alkali ? AVS (inline or recirculation) ? solid separation ? filtration ? concentration for liquid fertilizer or drying/granulation for dry product. AVS-100 or AVS-150 can be selected depending on capacity.
January 26, 2026 at 5:17 pm in reply to: Why is vector group classification important for power transformers? #332089Matthew JohnsonMemberVector group classification tells you how the windings of a three phase power transformer are connected (delta, star, zigzag) and what phase shift exists between primary and secondary. This is critical for paralleling transformers, avoiding circulating currents, coordinating protection, and ensuring correct phase relationships in the network. Grid operators use vector groups to check compatibility when connecting transformers into existing systems and to select proper CT and relay settings. Using an incorrect vector group can cause unbalanced voltages, unwanted trips or even equipment damage.
January 26, 2026 at 4:41 am in reply to: the transformer (grey box) on this power line is how far above the ground? #331973Matthew JohnsonMemberPole-mounted distribution transformers are typically installed at a height of roughly 5 to 9 meters (16 to 30 feet) above ground level. The clearance depends on national electrical codes, voltage class, conductor sag, and safety requirements for pedestrian and vehicle traffic. The elevated position provides electrical insulation from the public and protects the transformer from accidental mechanical contact. Utilities may increase height in areas with higher trucks or agricultural equipment.
January 26, 2026 at 2:54 am in reply to: What determines power transformer winding configuration? #331959Matthew JohnsonMemberWinding configuration (delta, wye, zigzag, autotransformer, three-winding) is chosen based on system grounding requirements, voltage levels, fault currents, and harmonic performance. Utilities may require specific vector groups to manage phase shifts or parallel operation with existing units. Mechanical considerations, such as short-circuit withstand and ease of manufacturing, also play roles. The configuration affects impedance, zero-sequence behavior, and the ability to connect to particular network topologies in transmission or distribution systems.
January 23, 2026 at 6:51 pm in reply to: Why are power station transformers essential for reliable high voltage energy conversion? #331520Matthew JohnsonMemberPower station transformers, especially generator step up units, are critical for converting generator output to the high voltages used on transmission lines. Their reliability directly affects the availability of generating units and thus grid stability. They must withstand thermal cycling, short circuit stresses and transient overvoltages for decades. High efficiency reduces station losses, and robust design ensures safe operation during faults and switching events. As a result, these transformers are engineered and maintained as key assets in any power plant.
Matthew JohnsonMemberPower losses arise from core (iron) losses, copper (winding) losses, stray losses, and dielectric losses. Core losses include hysteresis and eddy currents due to alternating flux in the core. Copper losses are I²R heating in windings under load. Stray losses occur when leakage flux induces currents in structural parts, clamps, and tank walls. Dielectric losses occur in insulation and oil under electric stress. Together they reduce efficiency and generate heat that must be removed by the cooling system.
January 23, 2026 at 2:44 am in reply to: Which tests do manufacturers of power transformers perform before shipping units to utilities? #331377Matthew JohnsonMemberManufacturers perform routine tests (ratio, winding resistance, insulation resistance, tan-delta, impedance, no-load/load losses, induced and applied voltage withstand), type tests (lightning and switching impulse, temperature rise), and sometimes special tests (partial discharge, FRA, sound level, OLTC mechanical tests). Oil tests (BDV, moisture, DGA baseline) and leak checks are also carried out. Test reports are provided to utilities as part of FAT documentation before shipment.
January 22, 2026 at 5:21 am in reply to: What does a power transformer schematic diagram typically include? #331162Matthew JohnsonMemberIt includes winding symbols, vector groups, tap changer connections, CT/VT points, and terminal designations for electrical interpretation.
January 21, 2026 at 10:29 am in reply to: Can TOR-5 be transferred from one transformer to another? Can it be installed on a wheeled trolley? #330868Matthew JohnsonMemberIn principle, yes – TOR-5 can be transferred from one transformer to another, but this is not its typical or most effective mode of use. The system is designed for permanent installation so that long-term trends and historical data are preserved. Moving it frequently breaks continuity, requires flushing, air removal, and re-commissioning each time, which reduces diagnostic value. Mounting on a wheeled trolley is technically possible for temporary campaigns or trials, but in practice portable analyzers are better suited for that role, while TOR-5 shows its real benefit in fixed installations on critical transformers.
January 21, 2026 at 6:39 am in reply to: Where is a high power transformer used in industrial environments? #330813Matthew JohnsonMemberHigh-power units are used in steel mills, smelters, petrochemical sites, mining, pulp & paper, rail traction, and high-density data centers to feed MV/LV loads.
November 12, 2025 at 8:46 pm in reply to: Need pricing for USB-2 bitumen emulsion units of 2 m³/h and 8 m³/h capacity. #327657Matthew JohnsonMemberThe USB-2 emulsion systems provide continuous production at 2 and 8 m³/h with precision dosing and automatic control. Technical and price data will be included.
November 11, 2025 at 11:51 am in reply to: Already using a TOR-80 tester and would like to connect it to a PC for custom testing profiles. Need software details and system requirements. #327500Matthew JohnsonMemberThe TOR-80 PC interface software supports custom voltage profiles and data logging. It operates on Windows 10+ with standard USB connection. A license key and installation package will be included.
Matthew JohnsonMemberGlobeCore specializes in purification and regeneration of oils but does not perform hazardous waste disposal. We recommend contacting an industrial waste management company certified for oil and coolant disposal.
November 7, 2025 at 9:29 pm in reply to: Kindly quote us the Transformer oil purification machine. Thank you. M., Siva #327154Matthew JohnsonMemberPlease specify the required capacity and voltage. GlobeCore manufactures transformer oil purification machines (CMM-series) ranging from 600 L/h to 12 000 L/h. A quotation will be prepared accordingly.
September 15, 2025 at 8:40 am in reply to: ¿Para qué sirve el filtrado de aceite dieléctrico en el mantenimiento de transformadores? #325412Matthew JohnsonMemberEl filtrado elimina impurezas que afectan la conductividad y aislamiento del aceite. Las unidades GlobeCore aseguran una purificación completa conforme a los estándares internacionales para prolongar la vida útil del transformador.
September 10, 2025 at 2:08 pm in reply to: What are best practices for transformer maintenance? #325245Matthew JohnsonMemberKey practices include regular oil testing, purification, visual checks, and thermography. GlobeCore’s mobile oil service systems allow on-site oil processing – reducing downtime and ensuring reliability in critical power systems.
September 9, 2025 at 11:01 am in reply to: How is the dielectric strength of transformer oil tested and improved? #324901Matthew JohnsonMemberIt’s tested via BDV. If strength is low, GlobeCore dehydration and vacuum purification units can remove root causes like water and sludge, restoring the dielectric properties quickly and cost-effectively.
September 9, 2025 at 10:57 am in reply to: ¿Qué beneficios tiene una filtradora de aceite dieléctrico de alta eficiencia? #324899Matthew JohnsonMemberMejora el rendimiento del aceite, prolonga la vida útil del transformador y evita fallos eléctricos. Las filtradoras GlobeCore eliminan agua libre, gases disueltos y partículas, cumpliendo con los estándares IEC y ASTM.
September 9, 2025 at 7:43 am in reply to: ¿Qué tipo de máquina para filtrar aceite se recomienda en plantas eléctricas? #324799Matthew JohnsonMemberPara subestaciones y plantas eléctricas, GlobeCore recomienda una unidad portátil de purificación al vacío, como la serie CMM. Estas máquinas filtran el aceite de transformador, eliminan la humedad y los gases, y permiten también realizar el llenado de transformadores bajo vacío.
September 9, 2025 at 7:29 am in reply to: ¿Cómo funciona el filtrado de aceite de transformador en equipos modernos? #324790Matthew JohnsonMemberEl filtrado de aceite de transformador moderno se realiza mediante vacío profundo, desgasificación térmica y microfiltración. Los sistemas de GlobeCore eliminan la humedad disuelta y los gases, restaurando las propiedades dieléctricas del aceite in situ, sin necesidad de desmontar el transformador.
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