Square D MasterPacT NW DC Rated Circuit Breakers Catalog

MasterPacT NW Circuit Breakers are designed to protect electrical systems from damage caused by short circuits. All MasterPact circuit breakers are designed to open and close a circuit manually and to open the circuit automatically at a predetermined overcurrent setting. Selection of a dc circuit breaker is based on the type of dc system, the rated voltage, and the maximum short-circuit current at the point of installation. UL Listed circuit breakers are for use on ungrounded systems rated 500 Vdc (600 Vdc unloaded) or less. IEC Rated circuit breakers are for use on ungrounded, grounded middle point, or grounded negative systems.