Fireproof and Moisture-Resistant Dry-Type Transformers | Low-Noise Solutions for Hospitals and Subways
Time：2025-10-28 Auther：ZTelec-www.ztelectransformer.com
In industries where safety, reliability, and environmental performance are paramount—such as healthcare and urban rail transit—there is zero tolerance for electrical failure. The fireproof and moisture-resistant dry-type transformer is specifically engineered to meet these rigorous standards. It provides continuous and stable power while offering low noise, superior safety, and excellent humidity resistance, making it the ideal solution for hospitals, subways, tunnels, and other enclosed facilities.
Why Hospitals and Subways Have High Transformer Requirements
Hospital Application Scenarios
In hospitals, key areas such as operating rooms, ICUs, and imaging departments depend on precision medical equipment that requires a stable, interference-free power supply. Any electrical fire could cause catastrophic consequences. Epoxy resin cast dry-type transformers contain no flammable oil, inherently eliminating fire hazards. Their sealed construction ensures that even under overload or short-circuit conditions, fire risk remains minimal.
Low-noise performance is another critical factor. Optimized magnetic core design and vibration control allow these transformers to operate at noise levels below 50 dB, maintaining quiet environments necessary for patient recovery and sensitive diagnostic equipment.
Moreover, frequent cleaning and disinfection create humidity fluctuations in hospitals. The transformer’s moisture-resistant insulation system ensures consistent dielectric strength even in damp environments, preventing breakdowns caused by condensation or contamination.
Subway Application Scenarios
Subway stations, as underground enclosed spaces with dense passenger flow, place exceptional emphasis on fire safety. The dry-type transformer’s oil-free structure eliminates the combustion and explosion risks associated with oil-immersed models. Its compact, sealed design enables safe operation in limited spaces with poor ventilation.
Passenger comfort and operational reliability are equally important. Low-noise operation enhances the acoustic environment of platforms, tunnels, and control rooms. Additionally, superior moisture and condensation resistance ensures long-term reliability even in humid and leak-prone conditions, making it ideal for subway applications.
Core Advantages of Fireproof and Moisture-Resistant Dry-Type Transformers
1. High Safety and Fire Resistance
Using VPI (Vacuum Pressure Impregnation), VPE (Vacuum Pressure Encapsulation), or epoxy resin casting technology, the coil is formed into a solid, flame-retardant structure. The insulation system meets Class F or H thermal ratings and features self-extinguishing properties, ensuring compliance with the strictest fire safety standards including IEC and IEEE specifications.
2. Superior Moisture and Contamination Resistance
The fully sealed coil structure effectively prevents moisture, dust, and corrosive gases from entering. With a protection rating of IP20 or higher (up to IP23), these transformers perform reliably in damp locations such as hospital basements, tunnels, and subway stations. This high level of protection minimizes maintenance needs and prolongs service life.
3. Exceptional Low-Noise Operation
High-permeability silicon steel sheets combined with step-lap core construction minimize magnetostriction and vibration. Optimized mechanical damping systems and soundproof enclosures ensure operational noise below 50 decibels, meeting the strict acoustic standards required in hospital wards and public transportation areas.
4. High Efficiency and Environmental Protection
The transformers achieve SC(B)H15 and SC(B)H16 energy efficiency levels, characterized by low no-load and load losses. This not only reduces operational costs for high energy consumers such as hospitals and subways but also aligns with sustainability goals. Being oil-free, non-toxic, and recyclable, they fully support green infrastructure initiatives.
Selection Guide for Hospital and Subway Transformer Projects
To ensure optimal performance and long-term reliability, the following selection factors are recommended:
• Energy Efficiency Level: Ensure compliance with the latest energy efficiency standards (e.g., GB 20052 or IEC 60076).
• Noise Level: Request detailed acoustic test reports specifying measurement distance and sound levels.
• Protection Rating (IP Code): Choose the appropriate IP level based on installation humidity and pollution levels.
• Certifications and Standards: Confirm compliance with CE, ISO, UL, and IEC/IEEE certifications.
• Supplier Experience: Select manufacturers with proven experience in supplying transformers for hospitals, metro systems, or public infrastructure projects.
In critical environments related to public safety and healthcare, no compromise is acceptable in power reliability. Fireproof and moisture-resistant dry-type transformers provide not just electricity, but safety, comfort, and long-term efficiency. Designed specifically for hospitals, subways, and underground facilities, these transformers deliver quiet, efficient, and secure power — a cornerstone of modern urban infrastructure and healthcare operations.
