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Nancy Harris
Nancy Harris
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January 24, 2026 at 11:24 pm in reply to: What topics are covered in an electric power transformer engineering PDF? #331751Nancy HarrisMember
Such PDFs summarize design fundamentals, insulation systems, thermal models, short-circuit withstand calculations, OLTC design, testing standards, protection, diagnostics, maintenance, and failure analysis, often with utility practices.
January 24, 2026 at 10:01 am in reply to: Where are medium power transformers installed within the grid? #331647Nancy HarrisMemberSame as above: placed in MV yards, urban substations, renewable plants, campus substations, and industrial service points that require moderate capacity and robust short-circuit withstand.
January 24, 2026 at 8:28 am in reply to: What power transformer tests are performed before commissioning? #331623Nancy HarrisMemberRoutine tests include winding resistance, ratio, vector group, insulation resistance, tan-delta, PD, induced/AC withstand, and OLTC checks.
January 23, 2026 at 11:59 pm in reply to: What role do power system transformers play in grid operations? #331557Nancy HarrisMemberPower transformers step voltages up for transmission and down for distribution, matching levels for efficient energy transfer and load consumption.
January 23, 2026 at 1:27 pm in reply to: What are the power transformer parts and their functions? #331457Nancy HarrisMemberParts include core, primary/secondary windings, tap changers, bushings, cooling, tank, and protection accessories.
January 22, 2026 at 9:45 am in reply to: What is the role of vacuum in the CMM-12R oil regeneration systems process? #331226Nancy HarrisMemberVacuum promotes removal of dissolved gases and moisture, enhances filtration efficiency, and supports deep regeneration of oil chemistry, which is critical for restoring insulating properties.
January 22, 2026 at 1:55 am in reply to: What does a power transformer maintenance schedule include? #331113Nancy HarrisMemberIt defines periodic testing intervals, component inspections, oil processing cycles, and refurbishment actions to manage aging.
January 22, 2026 at 12:48 am in reply to: How does the oil meter on the output hose contribute to service accuracy? #331097Nancy HarrisMemberThe built-in oil meter provides precise measurement of oil volume delivered during refill or drained from the gearbox. Accurate accounting of lubricant volumes helps confirm full exchange, prevents over- or under-filling, and supports record-keeping for maintenance audits and oil life tracking.
January 21, 2026 at 9:49 pm in reply to: Why is gearbox flushing important before refilling with new oil? #331055Nancy HarrisMemberGearbox flushing is critical because it removes residual worn particles, water, oxidation products, and other contaminants that standard draining cannot eliminate. During this process, flushing oil is pumped at pressure (up to 5 bar and heights up to 105 m) through internal gearbox channels to displace old contaminants. This helps prevent contamination of the new oil, ensuring the longevity and performance of the drivetrain.
January 21, 2026 at 8:14 am in reply to: What performance requirements apply to HV power transformers? #330836Nancy HarrisMemberHV units must meet high BIL ratings, low PD levels, controlled losses, stable impedance, robust cooling, and meeting grid protection, harmonics, and transient requirements.
November 11, 2025 at 6:26 am in reply to: Need quotation for one CMM-0.6 degassing and filtration cart suitable for 220 V outlet for use in Norway. Is it normally available from stock? #327480Nancy HarrisMemberThe CMM-0.6L is designed for transformer oil purification and degassing. It can operate on 220 V or 380 V depending on configuration. Production is made to order; current lead time and pricing will be provided.
November 10, 2025 at 11:34 pm in reply to: Request for budgetary price for the TOR-80 tester. #327454Nancy HarrisMemberThe TOR-80 breakdown voltage tester measures dielectric strength up to 80 kV. A budgetary quotation and delivery time will be sent.
November 10, 2025 at 4:13 pm in reply to: A university requires a transformer oil breakdown voltage tester. Please provide a quotation for the TOR-80 model. #327420Nancy HarrisMemberThe TOR-80 tester measures dielectric breakdown voltage up to 80 kV, suitable for educational and laboratory use. It includes automatic test sequences and IEC-compliant electrodes. Pricing and lead time will be provided.
Nancy HarrisMemberThe CMM-G wind turbine gearbox oil changer allows full replacement of oil in turbine gearboxes, including filtration and heating. A quotation and delivery schedule will be sent.
November 7, 2025 at 9:53 am in reply to: Please quote CMM-0.6L to Puerto Cortes, Honduras, Central America. 220V, 60Hz, 1 Phase. #327098Nancy HarrisMemberThe CMM-0.6L transformer oil purification unit operates at 600 L/h and can be configured for 220V, 60Hz, single-phase supply. We will provide a quotation including shipping to Puerto Cortes, Honduras.
November 5, 2025 at 12:11 pm in reply to: we need hydraulic oil purification can you help us to choose one. #326910Nancy HarrisMemberFor hydraulic oil purification, GlobeCore offers vacuum dehydrators (CMM series) and fine filtration systems (CFU series). They remove water and solid particles, improving oil cleanliness and service life. Please specify oil viscosity, contamination type, and required capacity for proper selection.
September 17, 2025 at 9:06 am in reply to: What is the transformer oil filtration procedure? #325547Nancy HarrisMemberThe procedure involves heating the oil, removing solid particles via filters, then applying vacuum dehydration and degassing. GlobeCore systems automate this process, ensuring IEC-compliant results without interrupting transformer operation.
September 15, 2025 at 8:09 am in reply to: What’s the best way to perform hydraulic oil filtration in industrial systems? #325401Nancy HarrisMemberBest practices include using offline filtration carts or bypass systems. GlobeCore provides plug-and-play hydraulic oil filtration units with 3-5 stage filters, particle counters, and optional water separation for oils in injection molding, presses, and gearboxes.
Nancy HarrisMemberIt includes oil testing (BDV, DGA, water content), thermal scans, vacuum oil filtration, and monitoring of core and windings. GlobeCore offers complete transformer service solutions – from on-site oil purification to deep regeneration and thermal vacuum drying.
September 9, 2025 at 12:52 pm in reply to: What is a bitumen tank heating system and why is it critical? #324968Nancy HarrisMemberProper heating is essential to maintain bitumen viscosity for pumping and mixing. GlobeCore offers thermal oil and electric heating systems with precise control, ensuring energy efficiency and preventing overheating or degradation of the bitumen.
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