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Li Wei
Li Wei
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GlobeCore does offer calcium carbonate grinding and dispersion using its AVS / AVSp vortex layer technology, which is shown in their videos for fine and nano-scale processing. However, achieving a guaranteed D90 = 200-300 nm is not a standard specification and strongly depends on the process setup: wet operation, use of dispersants, multiple passes in recirculation mode, cooling, and PSD measurement method. For nano-range targets, GlobeCore typically recommends AVSp units for lab/pilot trials, followed by industrial AVS units once the recipe is proven.
Li Wei会员Power transformers are rated primarily in kVA/MVA at specific voltage, frequency, cooling class, impedance, temperature rise, and vector group. The rating defines continuous thermal capability without exceeding insulation class. Short-circuit withstand, tap-changer range, sound level, and efficiency parameters are also specified. Nameplates summarize values required for system design, protection coordination, and procurement.
Li Wei会员Wind turbines convert kinetic energy into mechanical rotation, which drives a generator producing electricity. Step-up transformers increase voltage for collection grids and transmission. Substations then integrate generated power into national grids.
Li Wei会员Windings, paper/oil insulation system, bushings, barriers, spacers, and OLTC compartments determine dielectric strength and moisture tolerance.
Li Wei会员Schneider Electric transformers are used in commercial buildings, hospitals, data centers, industrial plants, mining, oil and gas, infrastructure projects, and secondary substations. Their portfolio focuses on MV/LV distribution, dry-type and oil-filled units packaged with switchgear and protection. Sectors value integrated solutions where transformers, switchboards, protection relays, and digital monitoring are sourced from a single vendor for easier engineering, commissioning, and lifecycle maintenance.
Li Wei会员Routine and type testing under IEEE/IEC includes ratio, impedance, dielectric, partial discharge, temperature rise, impulse, and oil analysis. Reports are certified for utility acceptance.
一月 24, 2026 4:21 上午 回复至： How is a single phase power transformer reconditioned during scheduled service intervals? #331591Li Wei会员Reconditioning may involve DGA, oil filtration or replacement, bushings inspection, OLTC servicing, drying or vacuum treatment to remove moisture, and tightening of mechanical clamping. Components with insulation degradation or hotspots are replaced.
一月 24, 2026 1:32 上午 回复至： What determines power transformers prices in industrial procurement? #331569Li Wei会员Prices are shaped by rating, voltage class, loss guarantees, customization, and manufacturer competition. Industrial buyers often evaluate total owning cost, so suppliers may offer multiple loss combinations affecting both purchase price and efficiency. Additional factors include regional labor costs, logistics, currency fluctuations, and the scope of testing and documentation required. Long-term service, spare parts packages, and on-site support can be bundled into pricing for complex industrial projects.
一月 23, 2026 8:23 下午 回复至： Why are power transformers essential for long-distance power transmission #331531Li Wei会员Power transformers are essential because they allow voltage to be stepped up for transmission and stepped down for distribution. High voltage means lower current for the same power, which dramatically reduces I²R losses and permits smaller conductor sizes and longer distances. Without transformers, transmitting large amounts of power over hundreds of kilometers would be inefficient and uneconomical. They also provide galvanic isolation, help control system voltages and enable the interconnection of networks with different voltage levels.
Li Wei会员Performance uses S = VI, efficiency eta = P_{out}/P_{in}, losses (core + I^2R), impedance Z = V/I, and regulation Delta V = (V_{nl}-V_{fl})/V_{fl}.
Li Wei会员It includes oil sampling, DGA, insulation tests, bushing inspection, OLTC service, cooling checks, grounding verification, and visual inspections.
一月 21, 2026 10:45 下午 回复至： When are power line isolation transformers used for noise and safety? #331068Li Wei会员Isolation transformers on MV/LV interfaces or sensitive equipment reduce common-mode noise, provide galvanic isolation, and improve safety and grounding schemes.
Li Wei会员In grid terminology it refers to step-up or step-down units used between generation, transmission and distribution voltage levels for efficient bulk power transfer.
Li Wei会员In Australia, power transformers are used by transmission and distribution utilities, mining and resources (iron ore, coal, LNG), heavy industry, rail and metro, ports, data centers, large commercial developments, and renewable energy projects (solar and wind farms). They appear in bulk supply points, zone substations, mine site substations, and industrial plants, stepping voltages between 66-500 kV transmission levels and medium or low voltage networks feeding urban loads and remote operations.
Li Wei会员Core (hysteresis + eddy), copper (I²R), stray, dielectric, mechanical vibration, and cooling system losses.
Li Wei会员Copper/aluminum content, core steel quality, OLTC complexity, voltage class, MVA rating, cooling system, testing requirements, logistics, and commodity prices drive cost.
Li Wei会员A power factor (PF) test measures dielectric losses in insulation systems of a transformer. By applying a voltage and comparing active to reactive power, technicians evaluate moisture ingress, contamination, aging, or carbonization in oil, paper, bushings, and winding insulation. Low PF indicates healthy insulation; elevated PF suggests deterioration and the need for further diagnostics.
Li Wei会员The USB-2/8 emulsion plant produces cationic emulsions ideal for chip seal work with 2-8 t/h capacity and stable emulsion output.
Li Wei会员The TOR-80 breakdown voltage tester measures dielectric strength of transformer oil up to 80 kV in accordance with IEC 60156. Pricing, delivery, and payment terms will be provided.
十一月 8, 2025 10:41 上午 回复至： I would like to get a commercial offer for CMM-6RL Transformer Oil Regeneration Unit. Thank you. #327204Li Wei会员The CMM-6RL is a regeneration plant for transformer oil with 6 m³/h capacity. It removes acids, oxidation products, and moisture, restoring dielectric strength and color. We will prepare a commercial quotation with technical data and delivery schedule.
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