2002 Square D Company ISO-FLEX Medium Voltage Controller. Model: 4. Class E2, Factory Order No. 17-15018462-004, Category no. AG44D, 3 phase. Nominal system voltage: 4000 / 4160 V, rated maximum voltage 5kv, continuous current 360 amps, control voltage 120 vac volts. Impulse withstand: 60 Kv, Horizontal bus rating: 1200A. Power supply: Control voltage: 120 VAC, 60 Hz, 3 phase. Features include: front and rear access, and a NEMA 1 indoor, painted and gasketed enclosure. Inside enclosure dimensions: 5 ft. 11 in. L. x 2 ft. 7 in. W. x 8 ft. 3 in. H. Overall dimensions: 6 ft. L x 3 ft. W x 8 ft. 8 in. H. Run Hours: 10838.0(BG)(ACN303).