dry transformer set

35kV epoxy resin cast dry-type transformer.

I. Product Overview

The design uses oil-free technology, vacuum epoxy casting, multi-step core, and an integrated intelligent temperature control system. It offers advantages such as Level 1 energy efficiency, fire resistance, explosion protection, moisture and dust resistance, short-circuit tolerance, maintenance-free operation, and an ultra-long service life, fully meeting the needs of modern power grids for green, low-carbon, safe, intelligent, and automated operation.

II. Key Technical Parameters (Customizable)

• Rated voltage: 35 kV (tap range ±2×2.5%) / 0.4 kV

• Rated power: 50 kVA-8000 kVA

• Connection group: Dyn11 (standard)

• Insulation class: Class F (155℃)

• Cooling modes: AN (natural air cooling) / AF (forced air cooling)

• Protection degree: IP20 / IP30 / IP40 / IP54 (for outdoor use)

• Short-circuit impedance: 6% (standard)

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III. Main structural and technological features

1. Main features: Ultra-low losses and exceptional silence.

• Uses grain-oriented silicon steel sheet with ultra-high magnetic permeability, thickness 0.23–0.27 mm, featuring high magnetic conductivity and extremely low losses.

• Nine-step stepped lap joint technology and step lamination ensure a uniform magnetic circuit, minimal magnetic resistance, and minimal vibration.

• Integral epoxy coating, providing moisture resistance, rust and corrosion protection, as well as noise reduction.

• The high-strength non-magnetic fastening strap, combined with an elastic damping structure, prevents loosening or abnormal noise during operation.

• Noise level is 3–5 dB(A) lower than SCB14, close to ambient background noise.

2. Winding: High strength, excellent insulation, and high short-circuit resistance.

• Low-voltage foil winding: Continuously wound from high-precision oxygen-free copper foil, ensuring uniform current distribution and extremely low eddy current losses.

• High-voltage multi-layer cylindrical winding: Balanced ampere-turn distribution, uniform interlayer insulation, excellent resistance to sudden short circuits.

• Vacuum epoxy casting with fiberglass reinforcement: No bubbles, voids, or weak points, high strength.

• Insulation properties include high impact resistance, moisture resistance, pollution resistance, no cracking, and no aging.

• Fire resistance class FV-0, smokeless, non-toxic, non-flammable during combustion, meeting the highest fire safety requirements.

IV. Key performance advantages

Extreme energy savings

With the lowest long-term operating costs.

• Suitable for 24-hour high-load operation in environments such as data centers, power grids, industry, and commerce.

• Reduces network losses, improves power factor, and cuts investment in reactive power compensation.

2. Highest level of safety

• Completely oil-free design, eliminating leaks, fires, and explosions.

• Can be installed directly indoors, in basements, high-rise buildings, and distribution centers.

• No need for oil storage, fire partitions, or fire pipelines, significantly reducing civil construction investment.

• Complies with the highest fire safety standards for crowded places such as hospitals, schools, subways, airports, and shopping malls.

3. Highest short-circuit resistance in the industry.

• Foil and cylindrical winding design ensures short-circuit and impact resistance, significantly exceeding national standards.

• High insulation integrity, no cracks, no aging, extremely low failure rate during long-term operation.

• Fully suitable for noise-sensitive areas such as residential neighborhoods, hospitals, schools, office buildings, and laboratories.

5. Ultra-high environmental adaptability

• Moisture-proof, dust-proof, resistant to salt spray, pollution, and condensation.

• Stably operates for long periods in coastal, chemical, mining, humid, dusty, and high-altitude environments.

V. Full range of applications

• Power grid systems: 35 kV substations, urban distribution networks, step-down substations in industrial parks, energy-saving upgrades of power grids.

• Data centers and new infrastructure: data centers, cloud computing centers, big data industrial parks, computing centers (preferably with low PUE).

• Premium public buildings: airports, subways, high-speed railway stations, hospitals, schools, shopping malls, office buildings, high-rise buildings.

• New energy power generation: 35 kV collector substations for photovoltaic and wind power plants, auxiliary facilities for power plants using energy storage.

• Hazardous industrial environments: oil, chemical, coal, pharmaceutical, metallurgical industries, as well as areas with flammable and explosive substances.

• Special conditions: coastal fog with high salt concentration, humid and rainy climate, severe air pollution, high-altitude areas, low temperatures, and noise-restricted zones.