Electrical Business

Hydro-Quebec’s 735kV line celebrates 50 years

December 1, 2015 – Hydro-Quebec announced it is celebrating the 50-year anniversary of the commissioning of “the world’s first 735kV high-voltage transmission line”.

According to the utility, electricity demand in Quebec was growing rapidly in the 1960s, requiring that Hydro-Quebec double its generating capacity every decade. A number of hydropower projects in the north “seemed promising”, says Hydro-Quebec, but getting electricity to load centres in the south economically “was a challenge that surpassed the existing power transmission technology”.

At that time, Hydro-Quebec says engineer Jean-Jacques Archambault was studying the 735kV voltage level and, in August 1962, the Quebec Hydro-Electric Commission gave the idea project the green light.

Those 735kV lines are the main arteries of Quebec’s transmission system to this day.


A video on the construction of the first 735kV line is currently being screened at the Electrium electricity interpretation centre.

learning curve Sponsored Content
Post your tech sheets, white papers, new technology etc. Contact Anthony Capkun