The Eaton Cutler-Hammer KT3400T Trip Unit is a 400 Amp replacement trip module for KT3400T K-frame circuit breakers, supporting Type KD and HKD trip configurations. It governs overcurrent protection and trip behavior for the associated breaker, enabling proper fault isolation. Designed for the KT3400T family, this unit is compatible with KD and HKD trip options to preserve the breaker's intended protection characteristics.
