Circuit breakers for DC current applications

For DC current networks with up 750 V of operating voltage and operating currents of up to500 A, the new NZM-A circuit breakers are the ideal protective devices. Equipped with thermo-magnetic tripping systems, they guarantee an accurate measurement of the effective value for operating and residual currents. The double-breaking contact systems allow for safe switching in high-energy networks with up to 60,000 amps of short-circuit current. Thanks to the high DC-3 utilisation category, these switches can be used universally, from photovoltaics, to network replacement batteries, and on to the demanding switching and protecting of DC-shunt motors in reversing and inching operation.