The Mobile Substation Leader

As the premier manufacturer of mobile transformers and mobile substations in the United States, Delta Star is the market leader in turnkey substation solutions for investor-owned utilities, electric cooperatives and municipals. 

  • Integrated, compact design 
  • Mounted on heavy-duty trailers or skids 
  • High and low voltage protection options 
  • Arrive fully assembled and ready to install 
Mobile Substations Engineered for Multiple Applications
Delta Star mobile substations are designed and built for easy mobility and quick deployment over a range of applications.
Emergency Service
Ensure your utility stays operational during any emergency.
Seasonal & Temporary Loads
Keep power flowing to your customers when they need it most.
On-Site Projects
Deliver power for long-term projects, maintenance or to unique industrial customers.
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Our Substation Capabilities

TYPE MVA (TOP RATING) HV kV
Mobile & Unitized Substations 133 13.2-345
Portable Substations 100 15-345
Mobile Circuit Protection - 15-345
Voltage Regulator 7 5-69
HV Circuit Switcher Trailer - 138
HV Breaker Trailer - <230
LV Breaker Trailer - <69
Cabie Reel Trailer - -
Capacitor Bank Trailer - -
Related Mobile Solutions
Beyond mobile substations, Delta Star offers a complete lineup of made-to-order mobile solutions designed to maximize uptime and provide utility support.
Mobile Transformers
Explore mobile transformer solutions designed for a range of applications and custom-designed to your utility’s needs.
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Trailer Solutions
Circuit switchers, breakers, switch gear and other auxiliary support mounted on heavy-duty trailers and built to your specifications.
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Field Service
Our expert field technicians offer rapid response times and nationwide coverage on installation, maintenance and repair projects.
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