CM3430-4 Moulded Case Circuit Breaker

ULM3(CM3) series of molded case circuit breaker, is our company independent research and development of a household or industrial low-voltage circuit breaker. It conforms to GB/T 14048.2 and IEC 60947-2 standards. ULM3(CM3) molded case circuit breaker has the characteristics of compact structure, full modularization, high break, zero arc and so on. Its rated insulation voltage 800V, suitable for ac 50Hz/60Hz, rated working voltage 690V and below, rated working current to 630A circuit for infrequent conversion and motor infrequent start. Circuit breaker has overload, short circuit and undervoltage protection device, can protect the circuit and power equipment from damage.

Download PDF

Get a Quote

Technical Parameters

Product Description
Standard Certifications		IEC60947-2
Item No.		ULM3-400
Number of poles		3,4
Electrical characteristics as per IEC60947-2 and EN60947-2
Rated current,In		250,300,315,350,400
Rated Operating Voltage,Ue		AC: 415V
Rated Insulated Voltage (Ui)		AC: 800V
Rated impulse withstand voltage,Uimp)		8kV
Ultimate breaking capacity (kA rms Icu）	220/240V	75
	380/400V	50
	415V	50
	550V	20
Rated service breaking capacity (kA rms Icu)	220/240V	50
	380/400V	35
	415V	35
	550V	13
Protection function		Overload, Short-circuit
Type of trip unit		Thermal-Magnetic
Magnetic trip range		400A
Utilization category		A
Endurance	Mechanical	7000 operations
Endurance	Electrical	3000 operations
Connection		Front connection
Mounting	Standard	Screw fixing
Dimensions(mm)	Pole
	3	257x140x145
	4	257x185x145
Note) Depth by door cut size : c1 for large cut, c2 for small cut