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石川 浩
石川 浩
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石川 浩Member
S = V × I (single-phase) or S = ?3 × V × I (three-phase). Determines kVA/MVA rating.
石川 浩MemberAn electrical power transformer is an AC electromagnetic apparatus that transfers power between voltage levels at constant frequency via inductive coupling, optimizing transmission and distribution efficiency.
January 25, 2026 at 3:20 pm in reply to: How is the power rating of a transformer defined in kVA? #331875石川 浩MemberTransformer power rating is defined by its apparent power capability at rated voltage, current, frequency, and cooling conditions. Because a transformer transfers AC energy with reactive components, kVA is used instead of kW to avoid dependence on load power factor. Ratings include thermal considerations such as insulation class, temperature rise, and cooling mode.
石川 浩MemberIn industrial or hydro contexts a power house transformer refers to the generator step up transformer feeding the grid. It converts generator voltage to transmission levels and provides isolation, impedance and robust fault performance.
January 21, 2026 at 1:08 pm in reply to: Looking for an oil purifying machine – what options are available? #330911石川 浩MemberНет «универсально лучшего» маслаочистительного оборудования — выбор зависит от типа масла (трансформаторное, турбинное, гидравлическое), характера загрязнений (вода свободная и растворённая, частицы, лак/варниш, кислоты), требуемой пропускной способности и целевых показателей чистоты (ISO-классы, диэлектрическая прочность, кислотное число). Для трансформаторного масла обычно оптимальны вакуумные дегазаторы/деаэраторы с вакуумной дегидратацией и тонкой фильтрацией, они одновременно удаляют воду и газы и восстанавливают диэлектрические свойства; для турбинных и гидравлических систем эффективны передвижные установки с микро-стекловолоконными картриджами и водоотделителями, обеспечивающие достижение требуемого уровня чистоты по частицам; при проблеме лакообразования и растворённых нерастворимых отложений используются электростатические коалессеры и адсорбционные системы (иерархия адсорбентов, молекулярные сита, активированный оксид алюминия/смолы) для удаления растворённых загрязнений и варниша. Перед покупкой проведите анализ масла (Karl Fischer для воды, счёт частиц, кислотное число, диэлектрическая прочность), определите целевой ISO-класс и пропускную способность, затем выбирайте установки по их эффективности удаления конкретных контаминантов, доступности расходников и сервисной поддержки.
January 21, 2026 at 12:51 am in reply to: What industries drive power transformer sales globally? #330730石川 浩MemberGlobal power transformer sales are driven by electric utilities, independent power producers, renewable energy developers, heavy manufacturing, oil and gas, mining, rail and metro systems, data centers and large commercial real estate. Grid expansion, urbanization and electrification of transport and industry increase demand. Integration of wind and solar plants requires new step up and collector transformers. Aging infrastructure replacement in developed regions and rapid load growth in emerging economies together sustain ongoing transformer procurement.
石川 浩MemberDuring a power surge such as lightning or switching overvoltage transformers experience elevated terminal voltages and steep wave fronts. Insulation and bushings are stressed and internal electric fields increase. Surge arresters and protective devices limit peak voltage and protect the insulation system. If protection is inadequate or insulation already weakened, partial discharges or flashover can occur, leading to local damage or more severe faults. Repeated surges accelerate aging even if immediate failure does not occur.
January 19, 2026 at 2:56 am in reply to: What is the definition of a power transformer in electrical engineering? #330280石川 浩MemberA power transformer is a static electromagnetic device that transfers energy between voltage levels at medium or high power, providing isolation and impedance within power networks.
November 11, 2025 at 12:23 pm in reply to: Need a quotation for a transformer oil regeneration system suitable for multi-grade industrial oils. #327502石川 浩MemberThe CMM-R series performs regeneration and purification of both transformer and industrial oils. It restores dielectric strength and removes acids and oxidation products. Technical details and pricing will be provided.
November 11, 2025 at 12:37 am in reply to: Request for indicative price for the CMM-260C transformer drying unit, delivery to Europe. #327458石川 浩MemberThe CMM-260C system is a stationary transformer drying unit operating under deep vacuum. We will provide indicative pricing, specifications, and delivery schedule.
November 10, 2025 at 12:01 pm in reply to: A distributor company is interested in cooperation and requests pricing and delivery terms for the TOR-3 Oil Tan Delta Tester. #327392石川 浩MemberThe TOR-3 Tan Delta Tester measures the dissipation factor and resistivity of dielectric fluids according to IEC standards. It is supplied ready for laboratory or field use. Pricing, delivery terms, and documentation will be provided.
November 7, 2025 at 3:43 pm in reply to: Need offer for CMM-260C STATIONARY TRANSFORMER DRYING UNIT #327132石川 浩MemberThe CMM-260C is a stationary transformer drying unit designed for vacuum drying of transformer cores and windings. It provides deep dehydration and can be equipped with heating and nitrogen protection. A quotation will be issued with specifications.
November 7, 2025 at 8:19 am in reply to: PLEASE COULD GIVE ME INFORMATION, QUOTATION AND DELIVERY TIME OF CMM-4.0F OIL FILTRATION UNIT. THANK YOU #327092石川 浩MemberThe CMM-4.0F oil filtration unit purifies transformer oil at 4 m³/h. We will provide a quotation including delivery time and available options.
石川 浩MemberThank you for reaching out. Please describe the issue or type of support needed for your CMM-2.2 oil purifier. Our technical team can assist with troubleshooting, maintenance, or spare parts.
September 10, 2025 at 10:49 am in reply to: What does transformer maintenance and testing involve? #325149石川 浩MemberIt includes oil analysis (BDV, moisture, DGA), mechanical inspections, and predictive monitoring. GlobeCore supports transformer maintenance with advanced oil purification and testing equipment – helping detect and prevent failures before they occur.
September 10, 2025 at 9:05 am in reply to: Is there a waste oil cleaning machine that restores oil to usable condition? #325135石川 浩MemberYes. GlobeCore offers waste oil cleaning machines capable of deep regeneration – not just filtration. These systems remove sludge, acid compounds, and water from used transformer, turbine, and hydraulic oils, making them fit for reuse and reducing disposal costs.
September 9, 2025 at 12:09 pm in reply to: What does a transformer oil purification machine do? #324941石川 浩MemberIt removes dissolved gases, water, and particles that degrade dielectric strength. GlobeCore’s purification machines use vacuum degassing, fine filtration, and heating to restore oil to IEC standards – ensuring transformer reliability and safety.
August 6, 2025 at 1:50 am in reply to: How much is Turbo Oil 2197 and how can costs be reduced? #324042石川 浩MemberTurbo Oil 2197, a synthetic aviation lubricant, is priced based on certification and supply chain factors. GlobeCore regeneration systems extend its usable life, reducing the frequency of new oil purchases.
石川 浩MemberTurbine Oil 500 is a heavy-duty lubricant used in large industrial turbines where long oxidation life is required. GlobeCore treatment units degas and dry Turbine Oil 500, keeping it service-ready.
August 5, 2025 at 1:11 pm in reply to: Which power model jet oil is best and how is it serviced? #323962石川 浩MemberSynthetic ester-based oils like BP 2380 and AeroShell 560 are preferred for model jet engines due to high-temperature stability. GlobeCore filtration units clean and dry these oils, keeping them effective for repeated use.
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