Dry-type transformers have wide applications in residential and commercial buildings, especially suitable for places with high population density, high fire safety requirements, and space constraints Its fire and explosion protection, low noise, and maintenance-free characteristics perfectly meet the safety and environmental needs of the building industry. The following details specific scenarios, application characteristics, and advantages:

I. High-rise buildings (office buildings, apartments, hotels)

Application scenarios

• Installation location ：Usually installed in the underground substation, floor equipment room or rooftop machine room, providing power for the entire building's lighting, elevators, air conditioning, water supply and drainage systems, fire protection facilities etc. power supply.
• Typical scenarios ：
  • Super high-rise office buildings ：Such as urban landmark buildings, it needs to supply power for thousands of office workstations, central air conditioning, and intelligent building systems.
  • High-end hotels ：Guarantee guest room power supply, kitchen equipment, banquet hall lighting and sound, swimming pool water circulation system, etc.
  • Large apartment communities ：Provide stable power supply for residents' electricity, charging piles, public lighting, and security systems.

Application characteristics

• Compact space ：Dry-type transformers are small in size (30%-50% smaller than oil-immersed transformers), and can be directly embedded in the building structure, saving valuable building area.
• Fire safety ：Using epoxy resin casting insulation or H-class flame-retardant materials, it meets the fire safety regulations of high-rise buildings "no open flame hazards" (such as the requirements of GB50016 "Fire Prevention Regulations for Building Design").
• Low noise design ：The noise level is usually below 50dB, avoiding interference to high-rise residents or office workers (such as hotel rooms need to meet the noise standard of ≤40dB).

Advantageous cases

• A 50-story commercial complex ：Using 10kV dry-type transformers, installed in the underground 2-layer substation, automatically adjusting the fan heat dissipation through the intelligent temperature control system, ensuring that the winding temperature ≤120℃ (F-class insulation standard) under full load operation, and at the same time preventing dust from entering through the IP30 protective shell, adapting to the humid environment of the basement.

II. Public facilities (airports, subways, hospitals, schools, etc.)

1. Transportation hubs (airports, train stations, subway stations)

• Application scenarios ：
  • Airport terminal ：Power supply for check-in systems, security equipment, baggage conveyor belts, waiting hall lighting and air conditioning.
  • Subway station ：Power supply for traction power supply system (indirectly providing power to trains), signaling system (such as track signal lights), escalators, emergency lighting and other key equipment.
• Features and requirements ：
  • High reliability ：Requires 24-hour uninterrupted operation, equipped with dual power switching device, ensuring power interruption time ≤0.5 seconds (such as airport security system does not allow power interruption).
  • Vibration resistance and moisture proof ：The subway platform environment is humid and there is train operation vibration, dry-type transformers need to pass seismic design (such as GB50111 "Seismic Design Code for Railway Engineering") and IP54 protection level test.

2. Hospitals

• Application scenarios ：
  • Operating room, ICU ：Provide independent power supply for precision medical equipment such as shadowless lamps, ventilators, and electrocardiogram monitors, avoiding interference from other loads.
  • Imaging department (CT/MRI room) ：Power supply for high-power imaging equipment, requiring the transformer to have low impedance (reducing voltage fluctuation) and fast overload capacity (to cope with the impact current during equipment startup).
• Features and requirements ：
  • Medical grade safety ：Using "medical isolation transformer" (a type of dry-type transformer), preventing electric shock caused by leakage, and meeting IEC 61558-2-15 medical electrical standards.
  • Quiet operation ：Transformer noise in ward areas needs to be ≤35dB to avoid affecting patients' rest.

3. Schools and educational institutions

• Application scenarios ：
  • Classroom building ：Power supply for classroom lighting, multimedia equipment, and laboratory instruments.
  • Gymnasium, canteen ：Provide stable power supply for large-scale power equipment (such as air conditioning, steamers, swimming pool equipment).
• Features and requirements ：
  • Fire prevention priority ：Complying with the requirements of "Design Code for Primary and Secondary Schools" GB50099, prohibiting the use of oil-immersed transformers, dry-type transformers need to pass the national 3C certification.
  • Overload adaptability ：To cope with the simultaneous startup of a large number of equipment during breaks (such as classroom air conditioners, water heaters), it needs to have a 120% overload capacity for continuous operation for 2 hours.

III. Commercial complexes (shopping malls, shopping centers, exhibition halls)

Application scenarios

• Large shopping malls ：Power supply for shop lighting, elevators, escalators, central air conditioning, cold storage, and fire systems (such as smoke detectors, sprinkler pumps).
• Exhibition hall / Convention and exhibition center Powering temporary high-power lighting (such as spotlights and LED screens), ventilation systems, and security monitoring equipment for temporary exhibitions.
• Supermarkets / Warehouses Powering refrigerators, shelf lighting, cash register systems, and logistics conveying equipment.

Features and requirements

• Flexible Power Distribution Using a "transformer + switchboard" combination scheme, capacity can be flexibly configured according to the power load of different floors or areas (e.g., the power density of shops on the first floor of a shopping mall is higher than that of upper floors).
• Emergency Response Equipped with Emergency Transformer Or linked with a diesel generator to ensure that critical loads such as fire systems and emergency lighting can immediately switch to backup power in the event of a mains power failure (switching time ≤ 1 second).
• Energy-Saving Design Using high-efficiency energy-saving dry-type transformers such as SCB14, with no-load losses 20% lower than national standards, meeting the requirements of the "Green Shopping Mall Building Evaluation Standard" GB/T 38849, and reducing shopping mall operating costs.

IV. Underground Buildings (Underground Shopping Malls, Parking Lots, Civil Air Defense Projects)

Application scenarios

• Underground Shopping Mall Powering shops, lighting, ventilation systems (such as exhaust fans), and emergency evacuation guidance systems.
• Underground Parking Lot Powering lighting, charging piles, fire hydrant pumps, and garage access control systems.
• Civil Air Defense Project Providing backup power for wartime communication equipment, emergency lighting, and ventilation equipment, and meeting the protection requirements of the "People's Air Defense Engineering Design Code" GB50225.

Features and requirements

• Moisture-Proof and Heat Dissipation The underground environment has high humidity (relative humidity often reaches 85% or more), and dry-type transformers need to use Vacuum Impregnated Insulation Or epoxy resin sealed structure to prevent moisture damage to insulation; at the same time, a forced air cooling system (AF) is configured to improve heat dissipation efficiency in high summer temperatures.
• Explosion-Proof Design If fuel vehicles are stored in underground parking lots, there may be combustible gases, and dry-type transformers need to use IP55 protection level to prevent the leakage of electric sparks from causing explosions.

V. Comparison of Core Advantages in Residential and Commercial Building Applications

VI. Selection and Design Suggestions

1. Capacity Selection Based on building load calculation (e.g., unit area load index: commercial buildings 80-120VA/m², residential buildings 50-80VA/m²), reserve 20%-30% margin to cope with future load growth.
2. Insulation Level Preferably F-class (temperature resistant 155℃) or H-class (temperature resistant 180℃), suitable for long-term full-load operation (such as all-day operation of shopping malls).
3. Intelligent Monitoring Configure a temperature controller (such as the WSK-200 series) to monitor the winding temperature in real time, interlock the fan start and stop, and connect the data to the building intelligent system (BMS) through the RS485 interface to achieve remote maintenance.

The application of dry-type transformers in residential and commercial buildings not only meets the needs of modern buildings for safety, environmental protection, and efficiency, but also promotes energy saving and intelligent development of buildings through technological innovation (such as low-loss iron cores and composite insulating materials), becoming the standard equipment for green building power distribution systems.