WiNmaster3 Power Circuit Breakers are a new generation of Air Circuit Breakers with modular construction to offer a truly global product platform meeting IEC, ANSI and UL standards. A line of Three and Four-pole devices ranging from 630 to 4000 Amp in two basic frames with fault interruption ratings of up to 100kA. A design offering a unique combination of High Fault current withstands ratings, short fault interruption time and zone selectivity. The device includes the new state-of-the-art MicroPro3 intelligent trip unit that enables the circuit breaker with the latest technology for system safety, reliability, measurement, relaying and communications using the Modbus, Profibus or device net protocol.