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Stephanie Lee
Stephanie Lee
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Stephanie LeeMember
Electric power transformers operate on electromagnetic induction. An alternating voltage applied to the primary winding produces a changing magnetic flux in the core. This time varying flux links to secondary windings and induces voltages proportional to the turns ratio. With a load connected, current flows, transferring energy from primary to secondary through the magnetic field. Ideally, power in equals power out minus small losses. By choosing appropriate turns ratios and insulation, transformers step voltages up or down efficiently while providing galvanic isolation between circuits.
January 26, 2026 at 6:34 pm in reply to: what factor limits the current rating of a power transformer? #332099Stephanie LeeMemberThe current rating of a power transformer is mainly limited by temperature rise in windings and core. As current increases, copper losses (I²R) grow rapidly, causing heating. If the temperature exceeds insulation class limits, insulation ages faster, reducing life expectancy or causing failures. Cooling capability, ambient temperature, winding design, conductor size and oil or air circulation all influence allowable current. Standards define maximum hot spot temperatures and winding gradients. Short term overloads may be allowed if thermal models show that cumulative insulation aging stays within acceptable limits over the transformer’s lifetime.
January 24, 2026 at 6:56 am in reply to: What applications require home power transformers in residential setups? #331611Stephanie LeeMemberResidential setups may use step-down transformers for doorbells, HVAC electronics, lighting, and low-voltage control systems, often integrated into power supplies.
January 22, 2026 at 3:30 am in reply to: What does power factor testing on transformers evaluate? #331136Stephanie LeeMemberIt evaluates insulation health by measuring dielectric losses. Higher power factor values indicate contamination, moisture, or insulation aging.
January 20, 2026 at 5:59 pm in reply to: How is sizing of power transformers performed for industrial loads? #330632Stephanie LeeMemberEngineers evaluate kVA demand, starting currents, harmonics, and duty cycle with margins for future expansion.
January 19, 2026 at 4:52 pm in reply to: What is apparent power in a transformer and how is it calculated? #330374Stephanie LeeMemberApparent power S represents the vector combination of real power P and reactive power Q. It is calculated as S = V × I for single-phase or S = ?3 × V × I for three-phase (line values). Transformer ratings in kVA or MVA are based on apparent power because the windings and insulation must handle both current and voltage magnitude independent of load power factor.
November 11, 2025 at 10:32 pm in reply to: Need the cost of the AVS-150 for humic acid production from leonardite. #327543Stephanie LeeMemberThe AVS-150 efficiently activates and extracts humic substances from leonardite through mechanical and electromagnetic interaction. Productivity and cost depend on feedstock composition.
November 11, 2025 at 10:45 am in reply to: Request for supply, installation, and commissioning of spare parts for a transformer vacuum drying plant. Please provide pricing and authorization letter. #327496Stephanie LeeMemberReplacement components and spare parts for transformer drying and vacuum systems are available. Compatibility with existing plants will be verified, and a list of recommended parts will be included.
Stephanie LeeMemberGlobeCore offers vacuum drying plants for transformer cores and windings. The system achieves vacuum up to 0.1 mbar with controlled heating. Please confirm transformer size and target dryness.
November 6, 2025 at 1:20 am in reply to: The energy division from the Panama Canal Authority needs to purchase fuller dirt for our oil regeneration equipment. Regards Eng. Abdiel Cooper #326962Stephanie LeeMemberThank you for your message. Please specify the model of your regeneration unit to confirm compatibility of the Fuller’s earth (adsorbent). GlobeCore can supply regeneration clay suitable for CMM-R and CMM-RL series units.
Stephanie LeeMemberAbsolutely. GlobeCore’s used oil purifiers regenerate industrial oils by removing oxidation products and restoring key properties. This reduces oil replacement costs and meets environmental targets for waste oil reduction.
September 9, 2025 at 8:33 am in reply to: What is dissolved gas analysis of transformer oil and why do utilities use it? #324825Stephanie LeeMemberIt’s a diagnostic tool to detect internal faults before they escalate. GlobeCore ensures your oil is clean and properly processed prior to DGA, so you avoid false positives and unnecessary transformer shutdowns.
August 4, 2025 at 11:06 pm in reply to: Where can BP 2380 turbine oil for sale be found and how is it maintained? #323866Stephanie LeeMemberBP 2380 turbine oil is sold through aviation lubricant distributors worldwide for use in jet engines and turbines. GlobeCore regeneration plants filter and degas BP 2380, ensuring its quality post-purchase.
Stephanie LeeMemberAeroShell 560 is a synthetic ester-based turbine oil designed for jet engines with high-temperature operating conditions. GlobeCore regeneration systems clean and dry AeroShell 560, ensuring consistent performance.
August 4, 2025 at 7:46 am in reply to: What is Norvey Inc turbine lubricating oil and how is it treated? #323764Stephanie LeeMemberNorvey Inc turbine lubricating oil is a regional brand designed for marine and industrial turbines. GlobeCore purification plants clean and dry Norvey oils, keeping them compliant with performance standards.
Stephanie LeeMemberA type of oil transformer refers to any transformer using insulating oil for cooling and insulation. GlobeCore regeneration units process the oil to maintain breakdown voltage and reduce aging effects.
August 1, 2025 at 3:26 am in reply to: Why use naphthenic transformer oil and how is it maintained? #323290Stephanie LeeMemberNaphthenic transformer oil is preferred for its excellent low-temperature fluidity and stable dielectric properties, making it ideal for cold climates and high-performance transformers. GlobeCore purification systems filter, degas, and regenerate naphthenic oils, extending their service life and reliability.
July 31, 2025 at 5:07 pm in reply to: Why use Indian Oil transformer oil and how is it serviced? #323228Stephanie LeeMemberIndian Oil transformer oils are refined mineral fluids designed for thermal stability and dielectric reliability. GlobeCore purification plants degas, dry, and filter Indian Oil products, extending their usable life.
July 30, 2025 at 8:06 am in reply to: Can burning transformer oil be used in diesel engines? #323015Stephanie LeeMemberWhile some industrial operations repurpose aged transformer oil as fuel, it must be thoroughly cleaned to avoid engine damage. GlobeCore systems purify used oils, removing harmful contaminants before any secondary use.
July 24, 2025 at 10:03 am in reply to: FR3 dielectric fluid gas analysis for energy companies #322241Stephanie LeeMemberPower utilities and energy companies use GlobeCore TOR-8 for dissolved gas monitoring in FR3 dielectric fluid, supporting predictive maintenance and system reliability.
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