Replace T1 and T2 Transformers (RenewUS Phase 1)

This project provides for the replacement of two of the four transformers at Preston Substation which feed electricity to the campus.   

Two of the four existing transformers at the Preston Substation were manufactured in 1968 and a third in 1988. The 1968 units are now over 40 years old and starting to show signs of deterioration. Though unlikely, it is possible these units could be of use for some time, so their condition is assessed annually. These transformers are oil filled and through the analysis of the oil it can be seen that the insulation is degrading, signaling the end of life. Due to the expansion (T4) and upgrade of the Preston Avenue substation in 2001, all of the related primary and secondary equipment should not require any changes or improvements for 20  years or at least as long as parts are available.

This project provides for the replacement of two of the four transformers at Preston Substation which feed electricity to the campus from SaskPower. The new transformers will be ordered with a dual primary of 138/72 kV. This will allow for SaskPower to upgrade our service to 138 kV which is a lower electrical rate. It will also provide the ability to connect to the Saskatoon Light & Power transmission system should the need arise, such as a long term outage in the SaskPower distribution system.