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15kV epoxy cast dry-type transformers are meticulously developed for 15kV/0.4kV power distribution systems, widely used in Zambia and other African mining projects, photovoltaic power stations, industrial parks, urban power grids, hospitals, commercial buildings, and underground power distribution rooms. The product fully complies with IEC 60076, GB 1094, GB/T 10228, and DOE 2016 international ultra-high energy efficiency standards, significantly lowering long-term power losses and total cost of ownership (TCO). Featuring a solid, dense cast resin structure, there is absolutely no insulating oil inside, permanently eliminating the acrid smell of heated fluids, as well as fire, explosion, and oil leakage risks. It adapts perfectly to tropical high humidity and dusty mining environments. The compact frame design perfectly fits various underground power distribution rooms and packaged box substations. It supports direct air shipment without the complex oil discharge treatment required by traditional fluid-filled units.
Our factory manufactures the full series of 15kV dry transformers, including the highly efficient SC(B)10, SC(B)11, and SC(B)12 energy efficiency models. We can precisely match supporting box substations, provide deeply customized electrical parameters, and arrange export fumigation packaging along with streamlined logistics solutions for both air and sea transport to Zambia.
The high voltage coil adopts a multi-layer thickened insulation structure, expertly engineered to withstand a lightning impulse voltage of up to 125kV. This provides a much larger insulation margin to confidently resist unstable voltage surges, direct lightning strikes, and the frequent switching shocks common in African 15kV overhead grids. The entire coil is formed through a full vacuum epoxy casting process, resulting in a smooth, rock-solid encapsulation with absolutely no internal bubbles. This meticulous encapsulation ensures partial discharge remains strictly controlled at ≤5pC, guaranteeing stable, degradation-free insulation performance under long-term high voltage operation. The physical robustness of the cast resin also acts as an impenetrable barrier against environmental contaminants, ensuring internal components remain pristine.
The core is constructed using premium Cold-Rolled Grain-Oriented (CRGO) silicon steel sheets, paired with a high-mechanical-strength clamping design. This structural rigidity effectively reduces no-load losses while massively enhancing the unit's ability to withstand severe short-circuit impacts without mechanical deformation. The windings adopt 99.99% oxygen-free copper wire or copper foil, delivering excellent electrical conductivity and strong short-circuit resistance. The optimized silicon steel core features precision miter joint cutting, which significantly reduces magnetic resistance and no-load loss. We offer two distinct pricing standards to match your operational goals: 0.0901 USD/W for the standard energy efficiency model, and 0.102 USD/W for the ultra-low loss model. This provides a highly cost-effective path for long-term operation, allowing facility managers to optimize capital expenditure against ongoing energy savings.
Operating without any insulating oil completely removes flammable liquid hazards from your facility. The solid epoxy resin is inherently self-extinguishing and releases absolutely no toxic gases even when exposed to direct flame or extreme ambient heat. To combat harsh external conditions, we offer optional NEMA 3R or IP20/IP23 protective housings. These rugged enclosures provide exceptional moisture-proof, dust-proof, and anti-salt fog performance, perfectly fitting Zambia's tropical humid climate and heavy particulate mining environments. Because there is no fluid to leak or catch fire, the unit can be safely installed indoors, in confined basements, and within densely populated public areas without the need for expensive, space-consuming fire isolation pools or complex fire suppression systems.
Optimized internal air ducts and thermal management ensure safe operation within strict 115℃/150℃ temperature rise limits, easily withstanding intense harmonic interference from heavy mining equipment and photovoltaic grid connections;
Optional F/H high temperature insulation class, supported by an intelligent forced air cooling system that enables a short-time 140% overload capacity to handle sudden peaks in power demand;
Acoustically engineered core clamping keeps running noise to a quiet ≤52dB, eliminating industrial acoustic fatigue and extending the reliable service life to well over 30 years;
Intelligent temperature control system features real-time over-temperature alarms, automatic trip protection, and RS485 remote communication for seamless integration into centralized monitoring grids.
Because there is no fluid medium, facility managers never have to perform oil replacement, routine oil testing, or hazardous oil waste disposal. Daily maintenance is reduced to simple visual inspections and basic dust cleaning, making it highly suitable for remote areas in Zambia with insufficient maintenance personnel. Before dispatch, we maintain a strict raw material traceability system and conduct 100% factory full inspection, including rigorous partial discharge and withstand voltage tests. We provide comprehensive factory inspection reports to guarantee industrial-grade reliability. Furthermore, this dry-type structure belongs to general cargo. It only requires a standard magnetic inspection report before air freight, entirely avoiding the complicated oil draining, drying, and nitrogen sealing procedures of traditional oil transformers, which greatly saves pre-transport processing fees and vital project time.
Our engineering team offers extensive customizable items: specific rated capacity, a 15kV tap range of ±2×2.5% or ±5%, and versatile connection groups like Dyn11/Yyn0. The system fully supports reverse feed applications, making it highly adaptable for complex grid configurations. We also tailor short-circuit impedance, enclosure grades, and specific winding materials (copper wire or copper foil) for mining and photovoltaic special structures. We provide robust export fumigation wooden case packaging, expertly arranged air and sea freight logistics, and dedicated Zambia local customs clearance guidance. Every unit is backed by a comprehensive 3-year full machine warranty and lifetime technical support. We draw upon rich project experience supplying 15kV dry transformers to Southern Africa countries, ensuring your power infrastructure operates flawlessly from day one.
A: Yes, absolutely. The dry-type transformer has no insulating oil, meaning you only need to apply for a standard magnetic inspection certificate before delivery. There are no complicated dangerous goods formalities. It can be directly packed in a secure fumigation wooden case for immediate air transport, saving the extensive oil draining, drying, and nitrogen sealing costs typically associated with traditional oil transformers.
A: The 0.0901 USD/W tier is our standard energy efficiency model, providing excellent baseline performance. The 0.102 USD/W tier is an ultra-low loss high-grade model engineered with superior CRGO steel and optimized winding techniques. It features significantly lower operation power consumption, making it ideal for long-running mining operations and photovoltaic stations. While the high-price model is about 13.21% higher in initial unit price, it drastically reduces the Total Cost of Ownership (TCO) over its 30-year lifespan.
A: We provide a complete suite of documentation, including ISO9001, CE, and IEC test reports, along with the detailed factory inspection certificate. For logistics, we supply the fumigation certificate, magnetic inspection report, commercial invoice, and packing list. We also actively assist with local customs clearance document guidance to ensure smooth import.
A: Yes, the system is fully customizable. We can precisely adjust the high voltage tap position, short-circuit impedance, and overall insulation level according to your local grid voltage fluctuations and specific mining short-circuit requirements.
A: We provide a comprehensive 3-year full product warranty. Alongside the hardware, we supply detailed operation manuals and step-by-step installation videos. If required, we can arrange experienced engineers for on-site guidance. We also guarantee a long-term supply of compatible spare parts at direct factory cost.ost.
