The company said it is in the final stages of testing new equipment installed at two substations that will help improve service reliability in the area.

The substations will also support the anticipated increase in demand for electricity during the summer months.

Work to install the new devices started in January of 2013 and represents about a $15m investment in service reliability.

Toledo Edison regional president Linda Moss said the new transformers will have a direct impact in making service for the company’s customers more reliable.

"This equipment will provide additional support for our transmission system as we enter peak demand time during the summer," Moss said.

Toledo said a multi-year project at another substation has been completed, and a new 59-mile transmission line has been energized between substations in the area.

Toledo Edison serves over 300,000 customers in northwest Ohio.