Mobile Substations & Portable Transformers

Scott Brown Winnipeg Products


 Mobile Substation and Transformer Capabilities

Rating HV Voltage LV Voltage
Up to 100 MVA Up to 230kV Up to 69kV


Mobiles are fully equipped electrical substations mounted on semi-trailers or skids. They can be as modest as a trailer-mounted transformer, or as complex as any land-based substation. The PTI Mobiles product line emphasizes both operation flexibility and long-term reliability, making them suitable for a wide variety of custom applications. These can include:

  • Substation relief in the event of equipment failure
  • Supporting substation maintenance and repair activities
  • Emergency power supply in event of natural disasters
  • Supply to Isolated Areas & Mining activities
  • Stand by for peak load demands

Recently a PTI Mobile Substation manufactured in Winnipeg, Canada was seen at various professional sporting championships to provide contingency power should the need arise.

The Mobile Substation design focuses on providing the user with a product that is easy to set up and use along with clear instructions and personalized training to provide a platform for rapid and safe integration into the required application. Our team is experienced integrating various primary and secondary protection and distribution apparatus such as reclosers, breakers, switchgear, etc. PTI manufactured Mobile Substations are in use with many North American utilities and the experienced team at PTI can support delivery of Mobile Substations within 10-12 months from receipt of order.


PTI designers understand that not all substations and applications have unlimited access and as such a wide variety of features are available to optimize maneuverability. To meet local road restrictions, PTI designers optimize the size and weight of the Transformer to the greatest degree possible while at the same time being true to PTI’s philosophy and reputation of reliability and robust manufacturing practices. Our design team stands ready to work closely with you to integrate all available options into your specific application.


PTI designers are Industry leaders and active members in standards groups ranging from IEEE/ ANSI, CSA, IEC, and CIGRE. Our design team typically employs a Hybrid insulation system incorporating high temperature materials in conjunction with traditional cellulose insulation to maximize the power output per unit size and weight.

Temperature Limits for Conventional and Hybrid Insulation Systems
Design Conventional Hybrid
Top oil temperature rise over ambient (ºC) 65 65 65
Average winding rise over ambient temperature (ºC) 65 95 115
Winding hottest-spot rise over ambient temperature (ºC) 80 130 150
Cellulose hottest-spot rise over ambient temperature (ºC) 80 80 80
Ambient temperature (maximum) (°C) 40 40 40
Top oil at maximum ambient temperature (°C) 105 105 105
Average winding temperature at maximum ambient (°C) 105 135 155
Winding hottest-spot at maximum ambient (°C) 120 170 190
Cellulose hottest-spot at maximum ambient (°C) 120 120 120

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Contact A Sales Representative

1155 Park Street
Regina Saskatchewan
Canada S4N 4Y8
Phone: 306.721.3114


Phone: 306.721.3114


101 Rockman Street
Winnipeg, Manitoba
Canada R3T 0L7
Phone: 204.452.7446


Phone: 204.452.7446

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