Marshall Municipal Utilities
"Providing Hometown Reliability"
Substations
Miami Substation
Miami Substation
The Miami Substation has two 25 MVA transformers that convert our electricity from 161,000 volts to 13,200 volts. This substation has 8 breakers; 8 MW (400 amps) each. Two breakers are feeders for Units #10 and #11. Miami Substation has a tie to the North Street Substation and a tie to the West Substation. The Miami Substation is located on Miami Street near the Power Plant.
West Substation
West Substation
The West Substation has a 25 MVA transformer that converts our electricity from 161,000 volts to 13,200 volts. It has 6 breakers; each breaker has 8 MW (400 amp) capacity.
Southeast Substation
Southeast Substation
This substation has a 25 MVA transformer that converts our electricity from 161,000 to 13,200 volts, and has 5 breakers-8 MW (400 amps) each.
North Street Substation
North Street Substation
The North Street Substation has ten 6 MW (300 amp) breakers. Two 4160/13.2 transformers in the North Street Substation have a combined 10 MW (500 amp) capacity.
Other Substations
B Substation
MMU also has three smaller substations located throughout Marshall. These are the A Substation on the 900 block of West College, the B Substation at the corner of South Lincoln and East Vest, and the C Substation on North Brunswick and East State Street.