This is a basic frame for 4 poles Masterpact MTZ2 40H1 fixed circuit breaker. Masterpact MTZ is the last generation of high current air circuit breakers up to 6300 A embedding advanced digital technologies. Masterpact MTZ is designed to protect electrical systems from damage caused by overloads, short circuits and equipment ground faults. The breaking capacity (Icu) is 66kA rms at 440VAC 50/60Hz. The rated current is 4000A. The basic frame must be associated with the corresponding chassis which has also to be ordered separately. This basic frame is compatible with Micrologic X control unit which has to be ordered separately. With Micrologic X control unit, Masterpact MTZ contributes to safety and energy efficiency. It can be equipped with a variety of optional functions and accessories. The dimensions are 537mm (W) x 352mm (H) x 300mm (D). It ensures compliance with international standards (IEC 60947), UL489, CCC, EAC and marine specifications. Masterpact MTZ and Micrologic X are part of EcoStruxure architecture system.