MCCBs - Enclosed compact circuit breakers from 15 to 2.000 A with only four frame sizes. These circuit breakers can be useduniversally – from the smallest of service distribution boards, to machine controls or motor starter combinations, up to largeenergy distribution systems with a maximum short-circuit breaking capacity of 150 kA. Special versions are available forsmaller power ratings with phase failure sensitivity protection for motor and motor-related applications. The range of CBs isrounded off nicely with switch actuation using toggle-lever, rotary- or remote operators. Shunt-, undervoltage- and earthfault- and residualcurrent releases complete the range. The MCCBs can be used universally for DC applications thanks to theirhigh DC-3 utilization category: ranging from photo-voltaics to emergency generator batteries to sophisticated breaking andprotection of DC shunt-wound motors in reverse- and jog mode. The new MC-A circuit breakers are the ideal protectiondevices for DC current networks with operating voltages up to 750 V and operating currents up to 500 A. Featuringthermomagnetic release systems for exact r.m.s. detection of operating and fault currents. These contacts feature a doublebreak system which enables safe breaking in high-energy networks with short-circuit currents of up to 70.000 amps.