Application scenarios ：

High-rise buildings: offices, residences, hotels; fire-proof and explosion-proof, for interior installation.

Rail transport: underground railway, high-speed rail stations, tunnel power supply systems.

Commercial complexes: Shopping malls, convention centers, big supermarkets.

Industrial and mining areas: precision workshops, dust-free and fire-proof workshops in the chemical and metallurgical industries.

Public facilities: Hospitals, schools, stadiums, data centers.

Municipal power distribution: substations for cities, industrial zones, sites of charging stations.

Ship cabin and offshore platform power supply (marine and offshore)

Main Features: Oil-free flame retardant, low noise, small size, maintenance-free, Top choice for fire-prohibited area.

Product Features：

1.Ultra High Energy Efficiency

The SC(B)18 model is a dry-type transformer of energy efficiency class 1. It has industry-leading energy conversion efficiency, with no-load and load losses much lower than those of lower efficiency classes. This means big savings on electricity over the life of the transformer, making it a smart, long-term investment for energy-conscious companies. Less energy consumption also leads to less greenhouse gas emissions, which will help your company meet its sustainability goals.

2. Better Mechanical and Electrical Performance

The GB20052-2020 standard transformer has a robust mechanical structure which offers superior short-circuit strength and seismic performance. The precision-wound coils and advanced clamping system ensure excellent electrical insulation and mechanical stability even under extreme operating conditions. The risk of equipment failure is reduced and the service life of the transformer increased.

3. Operation Virtually Maintenance Free

Maintenance-free, dry-type transformers are built using a totally enclosed cast resin design which eliminates oil changes, leak detection and other routine maintenance activities associated with oil-immersed transformers. The insulation material is resistant to UV radiation, chemical corrosion and temperature fluctuations, allowing for reliable operation in harsh outdoor and indoor environments with minimum intervention.

4. Improved safety features

The explosion-proof dry-type transformer is fireproof and non-toxic, avoiding the risk of oil fire and environmental pollution. It does not generate any harmful gases or smoke in case of a fault, thus ensuring the safety of persons and property. It also has advanced temperature monitoring and protection systems that automatically shut down the transformer if it overheats, preventing catastrophic failures.

Technical Parameter

Related knowledge 

Dry-type transformers are a new type of power transformer equipment, which is different from traditional oil-immersed transformers. The entire unit does not incorporate any insulation oil as heat dissipation or insulation media. It uses air convection for heat dissipation and solid state insulation instead. The whole structure is accurate and well integrated, mainly including iron core, high and low voltage windings, insulation system, heat dissipation structure, temperature control and protection system, external protective structure. All parts working together, to ensure long-term stable and safe operation.

1. Iron Core Construction

The iron core of the dry-type transformer is made up of high permeability, high quality grain oriented silicon steel sheets. Multi-stage lamination processes and accurate cutting and splicing techniques are effective measures to reduce the hysteresis loss and eddy current loss of the iron core. The iron core adopts close-fitting structure and shock-absorbing design, which can reduce electromagnetic vibration during the operation of the equipment, greatly reduce the noise of no-load and abnormal operation. Meanwhile, the normal iron core structure ensures the uniformity of magnetic flux distribution effectively improves the transformer efficiency, reduces the no-load energy consumption, and makes the transformer more energy efficient and stable under long-term continuous operation.

2. Design of High and Low Tension Winding

Windings are the main conductive and transforming elements of dry-type transformers. Dry-type transformers consist of two sets of structures: high-voltage windings and low-voltage windings. Nowadays, the epoxy resin vacuum casting technology is used in the mainstream dry-type transformers to seal and solidify the winding coils as a whole. Some models use a wound-wound dry type insulation structure. The coil conductors are neatly, tightly and uniformly arranged. After high temperature curing, they are formed into high strength integral solid structure, completely solving the problems of coil loosening and displacement in traditional oil-immersed transformers. The cured windings have very high mechanical strength, can effectively withstand the impact of short-circuit currents in the power grid, are not easily deformed, displaced and damaged, so that the operation stability and service life of the equipment can be improved from the core.

3. All-Solid-State Insulation System

Dry type transformers do not use the oil-based insulation medium of conventional transformers, but use a solid insulation system consisting of only the epoxy resin and composite insulation materials to form a complete high-strength insulation protective layer. The advantages of the insulation structure are high density, seamless, good moisture-proof, dust-proof, dirt-proof, aging-resistant and arc-resistant properties and it is suitable for complex working environments such as humid, dusty and enclosed environments. The insulation performance will not deteriorate over time during long-term energized operation, which will eliminate potential hazards such as oil leakage and insulation failure, and totally prevent common problems in oil-immersed transformers like insulation aging, oil deterioration, and creepage discharge.

4. Air cooling structure

The equipment is primarily cooled by natural air convection. The heat produced by the core and windings is dissipated by natural air circulation between the transformer body and the outside environment, so that oil tanks, oil pipes, cooling oil and other supporting structures are not required. The equipment is equipped with intelligent axial-flow forced-air cooling fan for dry-type transformers under large capacity and high load conditions. When the temperature of the equipment reaches a certain value, the fan will automatically start to increase the flow rate of the air, rapidly reduce the temperature of the body, so that the overload capacity and continuous operation capacity of the transformer can be effectively improved. The overall cooling structure is simple and reliable, there are no easily worn oil circuit components, and the cooling efficiency is stable and long-lasting.

5. Smart Temperature Control and Protective Accessories

The dry type transformer is provided with a full set of accessories as standard: intelligent temperature control system, temperature sensors, cooling fans, tap changers and inlet/outlet terminal blocks. The temperature control system has the functions of accurately monitoring the operating temperature of the three-phase windings in real time, over-temperature alarm, over-temperature tripping, automatic fan start/stop. It can monitor the operating status of the equipment in real time and prevent the high-temperature overload and overheating faults proactively. The tap changer can adjust the voltage level flexibly according to the fluctuation of the grid voltage and adapt to different power supply conditions. The standardized terminal block structure is clean and safe, providing safe and convenient wiring, and is compatible with various power distribution systems.

6. Structure of External Protective Enclosure  

The whole unit is provided with an integral metal protective enclosure. The protection level can be adjusted according to different scenarios, effectively preventing external dust, debris and moisture from entering the device. This also prevents accidental contact with live parts, and guarantees the personal safety and cleanliness of the interior of the equipment. The enclosure structure is strong and durable, impact-resistant and corrosion-resistant, suitable for various installation scenarios such as indoor power distribution rooms, computer rooms and enclosed spaces, effectively protecting the internal core components from external environmental interference.

Key characteristics:

1. Fire and explosion proof: Without insulating oil, there is no possibility of combustion or oil leakage.

2. Safe and reliable Strong short-circuit withstand capability, not easy to catch fire due to malfunction.

3. Easy to maintain: No oiling required, less maintenance, easy daily care.

4. Environmentally Adaptable Moisture-proof and dust-proof, suitable for installation in enclosed indoor places.

5. Low Noise: Low operating vibration and less disturbance to residents.

6. Small Size Small size, high utilization of space in the server room.

7. Green and clean: No oil pollution, green power distribution.

Standard Terms of Application:

1. Max. ambient temperature ≤ +40℃ 2.

2. Minimum ambient temperature is ≥ -25℃

3. Standard installation height ≤1000m

4. Installation indoors only in a dry, well-ventilated place.