The WEG Underground and Submersible Oil Type Transformer is a specialized power distribution solution developed by an engineering team specifically dedicated to this transformer range to meet specific characteristics and requirements of demanding urban environments. These transformers have streamlined sizes, aiming at reducing the requirement of installation space, making them ideal for confined underground vaults and subways where every square meter counts. They are used in underground power distribution systems in large cities, able to operate in highly aggressive environments with risks of flooding.

Underground and submersible transformers are designed to adjust the distribution voltage coming from utility companies to the levels typical of consumers, especially commercial and residential ones in large urban centers. The compact design allows for safe and efficient operation in areas where traditional transformers cannot be installed due to space constraints or environmental hazards.

Key Features & Advantages

Flood-Resistant and Submersible Design: Specifically engineered to operate in highly aggressive environments with risks of flooding. The oil-filled sealed tank construction provides complete protection against water ingress, allowing the transformer to remain operational even when fully submerged. This makes the transformer ideal for underground vaults that are prone to seasonal flooding or high water table conditions.

Streamlined Compact Dimensions: Developed by a dedicated engineering team, these transformers feature streamlined sizes that significantly reduce the requirement for installation space. The compact footprint enables installation in confined underground vaults, tunnels, and subways where traditional transformers cannot fit, without compromising on power capacity or reliability.

WEG Verticalized Manufacturing Advantage: The verticalization of manufacturing processes is a remarkable characteristic and advantage of WEG. By producing electrical insulating varnish, electric wires, corrugated panels, tanks, insulating kits, coatings, and other components in-house, WEG maintains broad quality control across all production phases. This vertical integration also provides flexibility in lead times and ensures consistent product quality.

Wide Technical Support Network: A wide network of accredited Technical Assistants is present all over Brazil, ensuring fast, local technical service and support to WEG's customers. This extensive service network minimizes downtime and provides peace of mind for utility companies and industrial operators relying on continuous power distribution.

Oil-Type Construction for Reliability: The oil-filled design provides superior dielectric insulation and heat dissipation, ensuring long-term reliability even under continuous heavy load conditions. The oil also provides additional protection against internal arcing and contributes to the transformer's ability to withstand harsh environmental conditions.

Primary and Secondary Voltage Options: Available with primary voltage up to 24.2 kV, the transformer steps down distribution voltage to typical consumer levels with secondary voltage ranging from 208 V to 240 V, accommodating both commercial and residential load requirements in major urban centers.

Proven Technology with Global Recognition: WEG is one of the largest manufacturers of distribution transformers, with over twenty years of experience in transformer manufacturing and consolidated technology for all applications. WEG equipment has been proven and tested in numerous demanding applications worldwide, including subsea electrical systems capable of operating at depths up to 3,000 meters.

Flexible Power Capacity Range: Available in a wide range of power ratings from 15 kVA to 300 kVA, allowing utilities and contractors to select the appropriate size for specific feeder requirements and load demands.

Technical Specifications

• Type: Oil-filled, underground/submersible distribution transformer
• Primary Voltage: Up to 24.2 kV
• Secondary Voltage: 208 V to 240 V
• Power Range: 15 kVA to 300 kVA
• Construction: Sealed tank, flood-resistant, submersible
• Cooling: Oil-immersed, self-cooled (ONAN)
• Frequency: 50/60 Hz
• Application Environment: Underground vaults, tunnels, subways, flood-prone areas
• Certification: INMETRO certified, Brazilian Label Program compliant

Applications

• Urban Underground Power Distribution: City center underground networks in large metropolitan areas
• Flood-Prone Areas: Regions with high water tables or seasonal flooding risks
• Commercial Districts: Power distribution for shopping centers, office complexes, and downtown business areas
• Residential Developments: Step-down distribution for apartment buildings and residential neighborhoods in dense urban environments
• Subway and Tunnel Systems: Power supply for transportation infrastructure requiring compact, flood-resistant equipment
• Industrial Facilities: Power distribution in space-constrained industrial environments with moisture exposure risks