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Pad-mounted Transformer

1. Tamper-Resistant Compartmental Design: Lockable high- and low-voltage compartments support safe outdoor installation and controlled access.

2. Radial-Feed or Loop-Feed Configurations: Primary arrangements can be engineered to match the project distribution system.

3. Live-Front or Dead-Front Primary Options: Bushing and termination arrangements are selected for the specified voltage class and utility requirements.

4. Project-Specific Protection and Switching: Bay-O-Net fuses, current-limiting fuses, surge arresters and load-break switches are available as required.

5. IEEE/ANSI and DOE Configurations: Designs can be provided to applicable IEEE standards and U.S. Department of Energy efficiency requirements when the product falls within the regulated scope.

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Product Details

Three-Phase Loop-Feed Pad-Mounted Transformer

This oil-immersed, compartmental-type transformer is designed for safe outdoor power distribution in commercial, industrial, utility and renewable-energy projects. Radial-feed and loop-feed configurations are available, with live-front or dead-front primary connections selected according to the approved project requirements.

Typical Technical Parameters

• Rated Capacity: 75–2,500 kVA

• Primary Voltage: 34.5/21/12.47 kV

• Secondary Voltage: 0.48 kV

• Primary BIL: 95 kV

• Secondary BIL: 30 kV

• Vector Group: Dyn11

• Frequency: 50/60 Hz

• Temperature Rise: 65 °C

• Noise Level: ≤63 dBA

• Electrical Efficiency: Up to 99.53%, subject to the final design and rating

Construction and Available Options

• Tamper-resistant high-voltage and low-voltage compartments

• Radial-feed or loop-feed primary arrangements

• Live-front or dead-front primary interfaces

• Bay-O-Net fuses, backup current-limiting fuses, surge arresters and load-break switches as required

• Mineral oil or natural ester insulating fluid options

• Project-specific metering, protection, accessories and corrosion-protection systems

Standards, UL Certification and Testing

UL-certified configurations are available for applicable projects. The final UL listing, marking and certification scope will be confirmed according to the selected model, rating and project requirements. Designs can also be supplied to applicable IEEE/ANSI requirements and U.S. Department of Energy efficiency requirements when the transformer falls within the regulated scope.

Dimensions, weight, impedance, losses, temperature rise, accessories and final performance values vary by rating and project. Final technical data will be stated in the approved drawings, quotation documents and certified test reports.

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