Heinemann SFM3-G3-32-1 Circuit Breaker hydraulic-magnetic MCB, SFM Series 32 Amp 3 Pole 440VAC 6kA Tripping Curve 1

• CBI has a wide variety of circuit breakers. The QF/SFM, NK and CBE products utilise the Hydraulic Magnetic technology, whereas the SFR and MCCB* ranges utilise the Thermal Magnetic technology.
• In a hydraulic-magnetic circuit breaker, the current travels through a coil that generates a magnetic field that trips the circuit breaker. Therefore, heat is not a factor in tripping a hydraulic-magnetic circuit breaker, and this means that a hydraulic-magnetic circuit breaker is always tripped by rated current, regardless of the ambient temperature. Other benefits include smaller module sizes and lower critical resistance.
• A Curve 1 tripping curve will be similar to a D Curve (long time delay) A Curve 2 will be similar to a C Curve (medium time delay) A Curve 3 will be similar to a B Curve (short time delay)