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Category Com Ed

Illinois Approves ComEd Project for Four Underground 138 kV Transmission Lines and New Substation Near O’Hare

Illinois Approves ComEd Project for Four Underground 138 kV Transmission Lines and New Substation Near O’Hare

A 138 kV rating does not tell you how much power a circuit can carry. ComEd’s approved project near Chicago O’Hare International Airport offers a useful starting point for learning how transmission voltage, cable heating and substation design fit together.…