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Olivia Baker
Olivia Baker
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Apparent power rating: S = V × I (1-phase) or S = ?3 × V × I (3-phase). Used to size MVA ratings for transmission and industrial applications.
Olivia BakerParticipantA power distribution transformer is used to step down medium voltage (for example, 11-33 kV) to low voltage levels suitable for end users, such as 400/230 V in many systems. It is installed on poles, pads or inside kiosks near load centers. Distribution transformers are designed for high efficiency at light to medium loads since they are energized continuously and often lightly loaded. They typically have fixed or limited tap ranges, simple protection and focus on robustness, low no load losses and minimal maintenance in everyday service.
January 26, 2026 at 5:12 am in reply to: in a transformer how does the power input to the primary? #331977Olivia BakerParticipantPower enters the primary winding as AC electrical energy. The alternating current produces a changing magnetic flux in the core, which induces voltage in the secondary winding. Energy transfer occurs magnetically rather than by direct conduction. In an ideal transformer, primary power equals secondary power. In real transformers, core and copper losses reduce delivered power.
January 25, 2026 at 11:03 pm in reply to: What factors influence power transformer designs for utility systems? #331932Olivia BakerParticipantUtility designs reflect grid code requirements, contingency loading, maintenance philosophy, remote monitoring, and interoperability with protection and SCADA systems.
January 25, 2026 at 9:15 pm in reply to: What criteria do utilities consider when selecting a power transformer supplier? #331918Olivia BakerParticipantUtilities evaluate technical compliance with IEC/IEEE standards, proven reliability, loss performance, total cost of ownership, manufacturing capacity, and delivery time. They assess service support, spare parts availability, testing facilities, and previous project performance. Quality certifications, warranty terms, and experience with similar voltage and MVA classes are critical. Environmental and safety practices, including oil containment and fire behavior, also influence supplier selection, alongside commercial factors like price and financing options.
January 21, 2026 at 10:13 pm in reply to: Which industries use international power transformers? #331061Olivia BakerParticipantInternational-spec power transformers are used wherever equipment or projects span multiple grid standards: global EPC projects, export-oriented manufacturing, offshore platforms, shipping, cross-border interconnectors, and multinational industrial groups. These transformers are designed to comply with IEC/IEEE and various regional codes, enabling deployment in Africa, Middle East, Asia, Europe, and the Americas without major redesign, thus serving diverse industrial and utility customers worldwide.
January 21, 2026 at 1:31 pm in reply to: Who are major power transformer manufacturers in China? #330924Olivia BakerParticipantIn China, several large state-owned and private enterprises produce HV/EHV power transformers, autotransformers, and HVDC converter transformers. They serve State Grid, Southern Grid, railways, and export markets. These companies operate large-scale factories with UHV testing capability, supplying 110-1100 kV class transformers, as well as medium-power and distribution units. Exact rankings shift over time, so market overviews usually refer to them collectively as “leading Chinese transformer OEMs.”
January 21, 2026 at 3:29 am in reply to: What industries rely on Hammond Power Solutions transformers for heavy duty applications? #330768Olivia BakerParticipantHammond Power Solutions transformers are often used in heavy duty industrial sectors such as metal processing, mining, automotive manufacturing, chemical plants and large HVAC systems. They also serve data centers, oil and gas, renewable projects and commercial buildings that need robust dry type or liquid filled units. Their control and isolation transformers are common in motor control centers and automation panels. Customers value rugged construction, multiple voltage options and compliance with North American safety standards.
January 20, 2026 at 6:58 pm in reply to: What should be the temperature of the oil heaters during degassing/dehydration in the vacuum purification process? The oil is mineral. #330646Olivia BakerParticipantFor mineral transformer oil in a vacuum dehydration/degassing unit, heater setpoints are usually kept in a moderate band: enough to drop viscosity and speed mass transfer, but not so high that you accelerate oxidation or “stray gassing.” Many service practices run around 60-70 °C for efficient vacuum drying/degassing, while CIGRE guidance also notes that oil treatment can be effective even at ~40-50 °C if the vacuum and process are set correctly. In the field, a common rule is don’t push much above ~65 °C unless you have a specific reason and tight control, because higher temperature increases aging rate.
January 20, 2026 at 4:17 pm in reply to: What is the drying time for a 5 MVA transformer in a US vacuum oven? #330608Olivia BakerParticipantThere is no single fixed drying time for a 5 MVA transformer in a vacuum oven, because it depends strongly on initial moisture content, insulation thickness, and the applied temperature and vacuum level. In practice, for a mid-size 5 MVA unit, a typical drying cycle ranges from 48 to 120 hours. Well-prepared transformers with moderate moisture may be dried in 2-3 days, while heavily wetted insulation can require 5 days or more. The end point is defined by moisture evolution rate and insulation resistance, not by time alone.
January 19, 2026 at 5:08 pm in reply to: How does a power transformers manufacturer verify dielectric strength and insulation quality? #330376Olivia BakerParticipantApplied/induced voltage tests, partial discharge, impulse tests, and oil dielectric breakdown testing validate insulation margins.
January 18, 2026 at 6:20 pm in reply to: Where is a 132/33 kV power transformer used in transmission and distribution networks? #330232Olivia BakerParticipant132/33 kV transformers are used to step down transmission voltages for distribution feeders supplying cities, industrial clusters, and commercial loads.
November 8, 2025 at 11:13 am in reply to: I will need a rental oil regeneration device for assembling of new TR in Palota / Romania. Please contact with me #327206Olivia BakerParticipantThank you for your inquiry. GlobeCore provides transformer oil regeneration units (CMM-R series) for purchase and rental depending on availability. Please specify rental period, oil volume, and transformer capacity, and we will confirm options and delivery to Palota, Romania.
November 6, 2025 at 3:26 am in reply to: RFQ – PURCHASE OF THE REGENERATION, PURIFICATION, TREATMENT, TESTING AND MEASUREMENT OF GAS & STEAM TURBINE OIL AND ELECTRICAL TRANSFORMERS #326970Olivia BakerParticipantGlobeCore provides complete systems for oil regeneration, purification, and testing, including CMM-R (regeneration), CMM (purification), and TOR (testing) series. Please share the scope of supply required to prepare an RFQ response.
September 9, 2025 at 1:17 pm in reply to: Can I use one oil purifier for multiple types of oil? #324985Olivia BakerParticipantYes, GlobeCore machines are built to handle transformer, hydraulic, turbine, and compressor oils with minimal setup change. Their systems offer customizable filtration stages and temperature settings for optimal purification of each fluid type.
September 9, 2025 at 8:44 am in reply to: What are the advantages of GlobeCore oil filtration systems? #324832Olivia BakerParticipantGlobeCore oil filtration systems offer modular design, stainless steel internals, automated safety controls, and international compliance (IEC, CE). Whether for transformer, hydraulic, or turbine oil, they provide reliable purification with low operating costs.
August 3, 2025 at 11:26 pm in reply to: What is jet engine oil and why is maintenance important? #323712Olivia BakerParticipantJet engine oil is a synthetic or ester-based lubricant designed to withstand high temperatures and oxidation in aviation turbines. GlobeCore filtration units degas and clean these oils, ensuring reliability and preventing premature degradation.
Olivia BakerParticipantType II mineral oil is an inhibited insulating fluid with additives to slow oxidation and acid formation. GlobeCore purification units maintain these oils by removing contaminants while preserving the inhibitors’ effectiveness.
Olivia BakerParticipantInsulating mineral oil is a refined petroleum product valued for its cooling properties and electrical insulation in transformers. GlobeCore systems remove water, gases, and sludge from mineral oils, maintaining performance and preventing breakdowns.
July 31, 2025 at 10:47 am in reply to: How are GE oil-filled transformers serviced for reliability? #323172Olivia BakerParticipantGE oil-filled transformers use mineral or ester oils for cooling and insulation in industrial and utility networks. GlobeCore treatment plants purify and regenerate these oils, ensuring stable dielectric performance and longer transformer life.
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