EM/SM series Moulded Case circuit Breaker (hereinafter called MCCE) is a new type breaker which is applied with rated insulatingvoltage 8oov (500V for EMSM 63), rated working voltage 690v in Ac(5060)Hz condition and used for infrequent exchange.
The MCCB can be used for overload, short-circuit, and under voltage situation to protect circuitsystem and power device from damage.
The MCCB can be divided into B,N,S,H types according to their rated limit short-circuit breaking capacity.
The MCCB has many advantages including compact structure, high breaking capacity zero flashover,short arccasting and superioraseismatic function.
The MCCB has function of insulation with its mark
The EM/SM series complies with IEC60947-2,GB14048.2.