Metrolinx Installs Traction Power Substations Along Hazel McCallion Line

Written by Kyra Senese, Managing Editor
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Metrolinx has announced updates along Hurontario Street with the installation of traction power substations along the Hazel McCallion Line and at the project’s maintenance and storage facility.

Each TPSS on the Hazel McCallion Line will be connected to utilities and will convert alternating current into 750-volt direct current to power the line via the overhead wires. On March 8, the first TPSS was installed on the west side of Hurontario Street and Skyway Drive.

The 13 power substation units will be installed gradually along the line, with the “burn in” section of track from the OMSF to Matheson being prioritized.

Because all TPSS structures are air-conditioned, they make a low humming noise, comparable to that of a residential air conditioner. They are designed to blend in with their surroundings and can be seen in communities across the GTA and North America.

TPSS structures are employed in similar projects, including powering the TTC, and will power other upcoming rapid transit projects such as the Finch West LRT, a release said. 

They are built with safety in mind and will be monitored on a regular basis by expert personnel. The next two TPSS will be installed this summer at Hurontario Street and Britannia Road, as well as Hurontario Street and Topflight Drive.