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Alberico Monicelli
Alberico Monicelli
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For SBS polymer asphalt modification at ~10 m³/h, the most straightforward match in the GlobeCore line is a continuous modification unit designed for polymer-modified bitumen-specifically USB-3, rated at 12 m³/h and intended to work with all common modifiers, including SBS (granules/powder/liquid). It’s built around controlled heating, intensive mixing/circulation, and stable dosing so you can keep the binder uniform at production-scale flow.
A control power transformer steps down MV/LV supply to low voltages (typically 24-120 V) for relays, protection schemes, PLCs, and auxiliary circuits. It provides isolation and stable regulation during voltage fluctuations, ensuring reliable automation and safety systems.
一月 27, 2026 8:02 下午 回复至： Why should we use star-delta connection in step down power transformers? #332311Star-Delta facilitates phase shift for grid compatibility, supports neutral availability on LV side, suppresses triplen harmonics, and suits distribution where loads are unbalanced.
To calculate the load power factor of a transformer, you measure real power P (kW) and apparent power S (kVA) at its terminals and then compute PF = P / S. Real power is obtained from wattmeters or power quality analyzers, and apparent power from voltage and current measurements. For three phase, S = ?3 × V × I. If the transformer is lightly loaded, power factor can be very low because magnetizing current dominates. It is important to distinguish this load PF from insulation power factor used in dielectric testing.
Thin, insulated laminations of electrical steel engineered for low-loss magnetization.
Losses depend on core material, lamination thickness, operating flux density, conductor resistance, current loading, leakage reactance, and harmonics. Frequency and temperature amplify losses.
一月 22, 2026 9:58 下午 回复至： What design challenges exist for large power transformers in substation environments? #331341Large power transformers face challenges such as high short-circuit forces, transport and installation constraints, noise limits in urban settings, and stringent efficiency requirements. Designers must manage thermal gradients, reduce hotspots, and ensure long-term insulation integrity under variable loading and ambient conditions. Environmental and safety demands include oil containment, fire behavior, seismic resilience, and SF? or alternative insulation integration in some designs. Coordinating protection, monitoring, and communication interfaces with modern digital substations adds further complexity to the design process.
After regeneration, dielectric strength typically increases from around 30 kV to approximately 70 kV, demonstrating a profound improvement in the oil’s capacity to withstand electrical stress.
一月 22, 2026 7:04 上午 回复至： Can the CMM-12R oil regeneration systems operate in combination with other maintenance equipment? #331187Yes – the CMM-12R oil regeneration systems can be integrated with existing degassing, drying, or vacuum systems, enabling flexible configurations for comprehensive transformer maintenance.
Corona in a transformer is a form of partial discharge in gas-filled voids or at sharp electric field gradients, typically in oil, paper interfaces, or at conductor edges. It occurs when the local electric field exceeds the ionization threshold of the surrounding medium, creating micro-discharges without a full breakdown. Over time, corona produces hydrogen, ozone, and acidic byproducts, degrades paper surfaces, and accelerates insulation aging. It is often an early-stage defect that does not trip protection immediately but shows up clearly in hydrogen DGA trends and acoustic/PD measurements.
Concerns mainly relate to audible hum, electromagnetic fields, and aesthetic impact rather than acute hazard. Distribution transformers follow grounding, insulation, and BIL standards to mitigate safety risks. EMF levels near residential pad-mounted or pole units are typically far below regulatory exposure thresholds.
400 Hz transformers are used in aviation, aerospace, military ground-power units, and shipboard systems because higher frequency reduces transformer size and weight. They support avionics, radar, communications, and aircraft auxiliary power units. Although not typical utility grid equipment, they are still power transformers optimized for reduced core volume and tight thermal limits under airborne or naval constraints.
十一月 12, 2025 1:10 上午 回复至： Interested in collaboration for high voltage test equipment manufacturing. #327553Thank you for your offer. GlobeCore focuses on oil purification and electrical insulation treatment systems but remains open to cooperation on high-voltage testing solutions.
Portable oil purification units from 0.6 to 6 m³/h are available in trailer-mounted or frame-mounted configurations. They remove water, gases, and solid impurities from transformer oil. Technical data and pricing will be shared.
GlobeCore can supply mobile oil purification systems that meet ISO 4406 standards, achieving particle count up to 17/14/10 and water content below 200 ppm. The CMM-6, CMM-10, and CMM-12 series can operate 24/7 with heating up to 68°C. We can prepare a rental proposal including logistics and operational support.
十一月 6, 2025 8:09 上午 回复至： Request for quote for a CMM-MSD dielectric oil online drying machine. #326988The CMM-MSD is an online dielectric oil drying and moisture removal unit that operates directly on energized transformers. It maintains oil dryness and dielectric strength during operation. We will prepare a quotation with delivery details.
九月 17, 2025 12:59 下午 回复至： What is a vacuum drying oven and how does it benefit transformer repair? #325588It dries transformer insulation at controlled temperature under deep vacuum – removing bound moisture. GlobeCore’s ovens are used in transformer factories and repair workshops to ensure dielectric integrity before refilling with purified oil.
九月 17, 2025 12:36 下午 回复至： What is a cold trap and how is it used in transformer maintenance? #325586A cold trap condenses water vapor in vacuum drying setups. GlobeCore uses cold trap technology in its vacuum drying ovens to ensure complete moisture removal during transformer core and winding drying.
A transformer oil treatment machine removes moisture, gases, and impurities from insulating oil. GlobeCore’s units use vacuum dehydration, degassing, and multistage filtration to restore oil properties. They support IEC 60296 compliance and BDV >70 kV.
IEC 60156 requires BDV ?60-70 kV for new oils. Used oils often fall below. GlobeCore vacuum dehydrators and filters restore dielectric strength by removing water, dissolved gases, and sludge.
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