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Ahmed Abdullah
Ahmed Abdullah
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January 28, 2026 at 4:10 pm in reply to: Which equipment would you recommend for simple filtration and removal of solid particles from pivot hydraulic oil used in TL pivots? #332420Ahmed AbdullahMember
For simple “polishing” of TL pivot hydraulic oil (mainly solid particles), I’d use a portable GlobeCore CMM-F / CMM-4.0F filtration cart: it’s designed specifically to remove solid particulate contamination from industrial/lube oils on-site. If you also see moisture issues (condensation, milky oil), step up to a GlobeCore CMM-LT hydraulic oil purification unit, which adds multistage fine filtration plus dehydration via heating/vacuum.
January 28, 2026 at 1:57 am in reply to: What is the range of no load power factor of transformer? #332357Ahmed AbdullahMemberNo-load PF is low, typically 0.05-0.2 lagging due to dominant magnetizing reactive current and minimal real power.
January 27, 2026 at 8:27 am in reply to: Why transformers are important in AC power generations? #332205Ahmed AbdullahMemberAC enables electromagnetic induction and transformer action, allowing voltage stepping for loss reduction, flexible network design, and multi-voltage distribution tiers. This was historically decisive in AC winning over DC for bulk grids.
Ahmed AbdullahMemberPower transformer ratings use kVA or MVA because they depend on apparent power, which represents the combination of voltage and current regardless of load power factor. Losses and heating relate to voltage and current, not only to real power in kW or MW. Using MVA allows the same transformer to serve different types of loads with different power factors as long as current and voltage limits are respected. It also simplifies coordination across systems, since other apparatus like generators and switchgear are often rated in apparent power too.
Ahmed AbdullahMemberYes. A transformer draws magnetizing current at no-load to energize the core. This produces hysteresis and eddy current losses, known as no-load losses. Even without load, these losses appear as heat and reactive power consumption.
January 25, 2026 at 2:33 pm in reply to: Why are substation power transformers required to operate under strict thermal limits? #331869Ahmed AbdullahMemberTransformer insulation aging is temperature-dependent. Exceeding thermal limits accelerates cellulose degradation, reduces dielectric strength, and shortens operational life. Thermal monitoring prevents failure and ensures loading compliance.
January 25, 2026 at 10:42 am in reply to: How are 3-phase transformer power calculations performed? #331839Ahmed AbdullahMemberThree-phase transformer power is calculated as S = ?3 × VLL × Iline for apparent power. Real power includes power factor. Engineers also consider winding configurations (Y/?), impedance, temperature rise and loading limits.
January 24, 2026 at 2:49 am in reply to: How is rated power calculated for a transformer under load? #331579Ahmed AbdullahMemberRated power is apparent power at rated voltage and current, with limits set by thermal rise and insulation class.
January 23, 2026 at 9:25 pm in reply to: What is the definition of power transformers in grid applications? #331539Ahmed AbdullahMemberPower transformers enable voltage adaptation in the grid for transmission efficiency and safe delivery to consumers.
January 22, 2026 at 6:56 am in reply to: What does a shore power transformer do in marine applications? #331185Ahmed AbdullahMemberIt isolates ship electrical systems from dock power, matches voltage and frequency when needed, and reduces galvanic corrosion through isolation.
January 21, 2026 at 7:19 pm in reply to: What industries require European power transformers for compatibility? #331018Ahmed AbdullahMemberIndustries operating in Europe or using European standard voltages and grid codes require compatible transformers. These include utilities, manufacturing plants, data centers, rail networks, offshore wind, industrial parks and large commercial complexes. Equipment exported into Europe from other regions also needs transformers designed for European frequency, voltage levels, insulation coordination and standards like EN and IEC. Multinational companies often standardize on European transformer designs across multiple sites for easier engineering and spare parts management.
January 21, 2026 at 9:33 am in reply to: How are Hyundai power transformers Alabama facilities handling factory testing and refurbishment cycles for large power units? #330854Ahmed AbdullahMemberHyundai’s Alabama facilities conduct factory acceptance tests (ratio, impedance, losses, insulation, partial discharge, and withstand tests) before shipment. Refurbishment cycles may include bushing replacement, OLTC inspection, gasket renewal, corrosion control, oil filtration/degasification, and relay upgrades. After refurbishment each transformer is re-tested to verify compliance with IEC/IEEE standards before being returned to substation service.
January 20, 2026 at 10:44 pm in reply to: In what sectors are GE power transformers deployed? #330700Ahmed AbdullahMemberGE transformers are deployed in utilities, petrochemical plants, steel mills, data centers, and renewable generation projects.
January 20, 2026 at 12:03 pm in reply to: Is separate TOR-5 online monitoring system required for each transformer? #330541Ahmed AbdullahMemberNo — the TOR-5 is an online monitoring and diagnostics system for transformer oil; it measures parameters such as moisture, dissolved gases, temperature and trends but does not physically generate or purify oil. Oil generation, dehydration, degassing and particle removal require mechanical treatment steps (heating, vacuum dehydration, filtration, adsorption/regeneration) that are performed by dedicated oil purification and regeneration equipment.
In practice you should use TOR-5 to continuously monitor oil condition and set alarm thresholds so that, when moisture, dissolved gas or contamination exceed limits, a vacuum oil purifier or oil regeneration unit is scheduled to treat the dielectric fluid. Integrating TOR-5 alarms with a maintenance program allows targeted use of vacuum dehydrators, filters and adsorbents to restore transformer oil quality and extend insulation life.
Ahmed AbdullahMemberCommon transformer faults include winding insulation breakdown, turn-to-turn shorts, bushing flashover, oil degradation, partial discharge, OLTC contact wear, cooling system failure, and core grounding faults. These issues originate from thermal aging, moisture ingress, overvoltage events, mechanical shocks, and contamination. Protection systems detect abnormalities through differential relays, sudden pressure relays, Buchholz relays, and thermal alarms.
Ahmed AbdullahMember50 MVA class power transformers are used in transmission and sub-transmission substations, large industrial complexes, mining operations, data centers, and large renewable plants. At this rating, units commonly operate in the 69-230 kV class and serve as primary step-downs to industrial MV feeders or as interties between transmission voltage levels.
November 10, 2025 at 5:16 pm in reply to: Request for dealer price for TOR-100 breakdown analyzer with IEC 156 test vessel and mushroom electrodes. #327430Ahmed AbdullahMemberThe TOR-100 is a high-voltage breakdown tester (up to 100 kV) for transformer and insulating oils. It includes the IEC 156 vessel and electrode set. Dealer pricing and delivery details will be provided.
Ahmed AbdullahMemberGlobeCore vacuum drying plants are designed for transformers up to 5000 kVA. The process time depends on transformer size and insulation condition but typically ranges from 8 to 20 hours. We will provide a quotation and process details.
November 6, 2025 at 2:27 pm in reply to: REQUEST FOR QOTATION AND SUPPORTING DOCUMENTS FOR A TRANSFORMER OIL MOISTURE AND TEMPERATURE ANALYZER #327024Ahmed AbdullahMemberThe TOR-1 moisture analyzer measures water content in transformer oil in ppm with temperature compensation. GlobeCore can provide full supporting documents, including CE, ISO, and calibration certificates.
Ahmed AbdullahMemberDesign should prioritize insulation, energy efficiency, safety, and ease of maintenance. GlobeCore offers tanks with electric or thermal oil heating, automated controls, and anti-corrosion coatings. Their modular design supports both stationary and mobile applications for standard and polymer-modified bitumen.
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