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Ashley Hall
Ashley Hall
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enero 27, 2026 a las 6:29 pm en respuesta a: Why the no-load power factor of an induction motor / transformer is very low? #332299Ashley HallMiembro
Magnetizing current is largely reactive, producing low real power at no-load.
enero 27, 2026 a las 1:00 am en respuesta a: what is the difference between voltage transformer and power transformer? #332149Ashley HallMiembroA voltage transformer, often called an instrument or potential transformer, is designed to reproduce system voltage at a lower, safe level for metering and protection devices with high accuracy and low burden. A power transformer is built to transfer significant power between circuits, prioritizing efficiency and thermal performance rather than precise ratio accuracy. Voltage transformers operate at low VA ratings and are part of measurement circuits, while power transformers handle kVA or MVA, feeding loads or other network sections. Their insulation, construction and testing requirements differ accordingly.
Ashley HallMiembroIn an ideal transformer, apparent power remains constant between primary and secondary. Voltage and current change inversely according to the turns ratio. Real transformers incur copper, core, and stray losses, so input power equals output power plus losses.
enero 25, 2026 a las 8:28 pm en respuesta a: What factors influence the power transformer market globally? #331912Ashley HallMiembroUrbanization, renewable integration, grid modernization, utility investment cycles, and regulatory efficiency mandates drive demand.
enero 25, 2026 a las 3:51 pm en respuesta a: How does a transformer interact with the power grid? #331879Ashley HallMiembroTransformers form voltage tiers between generation, transmission, and distribution, ensuring impedance matching, fault withstand, and regulation coordination.
enero 25, 2026 a las 1:32 pm en respuesta a: What formula is used to calculate power loss in a transformer? #331861Ashley HallMiembroTotal losses = core losses + copper losses; P_{loss} = P_{core} + I^2R plus stray and dielectric losses for detailed studies.
enero 24, 2026 a las 12:45 am en respuesta a: What affects the price list of power transformers in the Philippines? #331563Ashley HallMiembroPrice depends on kVA rating, voltage class, cooling, copper and steel costs, logistics, and local utility specifications and standards.
enero 23, 2026 a las 12:56 pm en respuesta a: Why are power transformers operated in parallel? #331452Ashley HallMiembroParallel operation allows utilities to increase total kVA capacity, share load, improve redundancy, and maintain service continuity during maintenance. For safe paralleling, transformers must match in voltage ratio, vector group, impedance, and phase displacement. Mismatches cause circulating currents, thermal stress, and uneven load distribution. Parallel banks also enhance system flexibility for seasonal and industrial load variations.
enero 22, 2026 a las 8:24 pm en respuesta a: How is a power transformer for an amplifier selected? #331329Ashley HallMiembrokVA, voltage taps, regulation, and noise performance guide selection for audio electronics.
enero 21, 2026 a las 9:42 pm en respuesta a: How does a transformer blowing cause a power outage? #331053Ashley HallMiembroInternal faults trigger protection that isolates the transformer and de-energizes downstream feeders, causing localized outages until switching restores service.
enero 21, 2026 a las 8:38 pm en respuesta a: What components are found inside a power transformer? #331037Ashley HallMiembroInside a power transformer you find the magnetic core, primary and secondary windings, insulation systems (paper, pressboard, spacers), clamping structures, core/coil assembly supports, oil channels or ducts, and, in oil-filled units, the insulating liquid itself. Bushings connect windings to external circuits, while internal leads route current to tap changers. Many designs include temperature sensors, winding supports, and internal shields to control electrical stress and stray flux. Each component is selected to withstand electrical, thermal, and mechanical stresses over decades.
enero 21, 2026 a las 2:26 am en respuesta a: Is it possible to determine the average age of a transformer’s paper insulation by any method? #330752Ashley HallMiembroThere is no method that can determine the exact average age of paper insulation, but there are well-established indirect techniques to estimate its remaining life. The most common is furan analysis of the oil, which correlates furan concentration with the degree of polymerization (DP) of cellulose. DP gives a good indication of mechanical aging. Additional methods include trend analysis of moisture, acidity, CO/CO? ratio in DGA, and historical thermal loading. These together allow a reasonable estimate of insulation aging, but never a precise «age» in years.
Ashley HallMiembroGE control transformers supply low-voltage AC for relays, contactors, PLC I/O, and automation equipment in industrial and utility switchgear.
enero 18, 2026 a las 9:12 pm en respuesta a: What does a power meter current transformer measure? #330248Ashley HallMiembroA current transformer for meters measures line current by scaling high primary currents to small secondary currents suitable for metering and billing. It maintains ratio accuracy and isolation for safe measurement.
noviembre 12, 2025 a las 8:29 pm en respuesta a: Start-up company looking for equipment for mixing and homogenizing bitumen, kerosene, acid, and amine. #327655Ashley HallMiembroGlobeCore offers bitumen modification systems capable of producing blended emulsions and cutbacks with consistent product quality.
noviembre 12, 2025 a las 12:07 am en respuesta a: Interested in pigment dispersion using AVS-100. Need pricing and performance data. #327549Ashley HallMiembroThe AVS-100 provides ultrafine pigment dispersion with uniform particle distribution. Typical particle size reduction is to 0.2-0.5 ?m. Throughput and energy data will be provided.
noviembre 11, 2025 a las 8:24 pm en respuesta a: Interested in cavitation reactors for use in India. #327535Ashley HallMiembroGlobeCore supplies cavitation systems worldwide. Local technical support can be arranged remotely or via partner distributors.
noviembre 11, 2025 a las 4:08 pm en respuesta a: Interested in the Electromagnetic Mill and want to understand the difference between AVS-100 and AVS-150. #327516Ashley HallMiembroBoth AVS-100 and AVS-150 electromagnetic mills work on the same vortex layer principle. The AVS-150 has a larger chamber volume, higher throughput, and more powerful inductor, allowing continuous operation with coarser materials or higher loads.
noviembre 8, 2025 a las 11:44 am en respuesta a: I was considering the TOR-80 or the TOR-100. What is the difference and the price? Rob #327208Ashley HallMiembroThe TOR-80 is a semi-automatic breakdown voltage tester up to 80 kV, while the TOR-100 is a fully automatic version up to 100 kV with programmable voltage rise rate and data storage. We will provide a quotation for both models including technical datasheets and lead time.
noviembre 7, 2025 a las 3:09 pm en respuesta a: Need quotation of breakdown voltage tester TOR-80 and detailed brochure. #327130Ashley HallMiembroThe TOR-80 is a semi-automatic breakdown voltage tester for insulating oils up to 80 kV. It conforms to IEC 60156 standards. We will send a quotation, brochure, and lead time information.
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