Standard voltages are 2,300/4,000 volts, 60 HZ. Stock motors are available in 3,600, 1,800 and 1,200 RPM.  They are available from stock from 200 hp through 1,500 hp, three phase, in NEMA 449T through 05812 frame sizes. They feature form coil vacuum pressure impregnated (VPI ) construction, high-pressure die cast aluminum rotors, all cast iron construction, NEMA Premium Efficiency and three year warranties.   Other features include winding resistance temperature detectors (RTDs), provisions for bearing RTDs, space heaters, 1.15 service factor, cast iron conduit boxes, and field convertible from F1 to F2, and Division 2 Zone 2 operation. These TEFC motors are available with several shaft configurations.  All speeds are designed for coupled applications.  The 1,800 RPM motors are designed with ball bearings that are convertible to roller bearings for belted loads.  The 1,200 RPM motors have an oversized shaft with roller bearings, convertible to ball bearings.