Cutler-Hammer KD3400F is a 3-pole circuit breaker rated for 400 A at up to 600 V. The KD3400F model designation identifies a three-pole device designed to interrupt current in 3‑phase electrical circuits. This part number specifies protection for equipment and wiring by breaking the circuit when the trip threshold is reached in systems operating at voltages up to 600 V and currents up to 400 A.
