ORANGE >> At 3-5 a.m. Saturday, Sept. 16, United Illuminating will be testing its system at its Barnum electrical substation in Stratford to maintain the reliability of its energy grid.

During this procedure, customers in some areas of Stratford, Milford and Trumbull may experience a power outage of less than five minutes.

Customers may wish to check clocks and electronic devices that typically need to be reset following an outage.