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石川 浩

石川 浩

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Viewing 20 posts - 1 through 20 (of 65 total)
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  • in reply to: How to calculate the power of a transformer? #332301
    石川 浩
    Member

    S = V × I (single-phase) or S = ?3 × V × I (three-phase). Determines kVA/MVA rating.

    in reply to: What is electrical power transformer? #332223
    石川 浩
    Member

    An 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.

    in reply to: How is the power rating of a transformer defined in kVA? #331875
    石川 浩
    Member

    Transformer 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.

    in reply to: What is a power house transformer used for? #330966
    石川 浩
    Member

    In 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.

    石川 浩
    Member

    Нет «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.

    in reply to: What industries drive power transformer sales globally? #330730
    石川 浩
    Member

    Global 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.

    in reply to: What happens to transformers during a power surge? #330580
    石川 浩
    Member

    During 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.

    石川 浩
    Member

    A 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.

    石川 浩
    Member

    The 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.

    石川 浩
    Member

    The CMM-260C system is a stationary transformer drying unit operating under deep vacuum. We will provide indicative pricing, specifications, and delivery schedule.

    石川 浩
    Member

    The 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.

    in reply to: Need offer for CMM-260C STATIONARY TRANSFORMER DRYING UNIT #327132
    石川 浩
    Member

    The 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.

    石川 浩
    Member

    The CMM-4.0F oil filtration unit purifies transformer oil at 4 m³/h. We will provide a quotation including delivery time and available options.

    in reply to: Support Request CMM-2.2 OIL PURIFIER #326966
    石川 浩
    Member

    Thank 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.

    in reply to: What does transformer maintenance and testing involve? #325149
    石川 浩
    Member

    It 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.

    石川 浩
    Member

    Yes. 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.

    in reply to: What does a transformer oil purification machine do? #324941
    石川 浩
    Member

    It 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.

    in reply to: How much is Turbo Oil 2197 and how can costs be reduced? #324042
    石川 浩
    Member

    Turbo 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.

    in reply to: What is Turbine Oil 500 and why is it important? #324030
    石川 浩
    Member

    Turbine 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.

    石川 浩
    Member

    Synthetic 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.

Viewing 20 posts - 1 through 20 (of 65 total)

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