The Cutler-Hammer DK3400W is a 400-amp, 240-volt molded case circuit breaker designed for three-pole protection in industrial and commercial power distribution. As a molded case breaker, it provides overload and short-circuit protection and is intended for installation in panelboards or distribution panels that require a 3-pole, 400-A device. The DK3400W designation identifies the Cutler-Hammer series for use in main or feeder circuits in electrical installations requiring three-pole protection at 240 V.
