This Old Control Box Became Obsolete and Was Taken Out of Service.
Click on photo to get the largest view to read numbers. TR13395, at upper left, Has large three wires which enter and then exit. I believe this is an "electrical current transformer", which has an output proportional to the amount of 3-electrical current passing through it. TR14016, at upper right, looks like a single phase step down transformer, but I am less sure of it's function. At lower left corner are three fuses to block excessive three phase current.
HVAC Equipment Room, Basement of Science Building, USCA Campus, Aiken, SC.
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(Photo = 5156 ...... WayPt = `000 |w|' 420 ft)