Siemens FR355DTK Heavy Duty Fusible Safety Switch, 600 VAC, 400 A, 350 hp, TPDT Contact Form, 3 Pole

Double throw safety switches are intended to transfer loads from one power source to another. All two- and three pole double throw switches are suitable for use as service equipment. All are UL listed. Switches are rated for use on systems up to 10,000A when protected with Class H fuses or 100,000A when protected with Class R or Class T fuses. They can also be used to connect a single source of power to either of two loads. In this application it is necessary to field modify fusible switches so that the fuses are on the load side of the switching mechanism. A cover interlock is provided on all ampere ratings. The operating handle may be padlocked in the OFF position.