4P 250A 200A Molded Case Circuit Breaker

In the context of increasingly strict modern electrical safety standards, more and more application scenarios require complete isolation and protection of all live conductors, including neutral wires. The SPX factory's high quality 4P 250A 200A Molded Case Circuit Breaker is an engineering practice under this core concept. It is specifically deployed on critical circuits with unbalanced three-phase loads, significant harmonic components, or where four pole isolation is required according to regulations. This series is not only a protective appliance, but also a solemn commitment to system compliance, operation and maintenance safety, and load adaptability, ensuring safe and secure power entry from medium-sized commercial facilities to high-end industrial applications.

Feature:

The two specifications of 200A and 250A accurately cover the mainstream medium-sized distribution capacity requirements of approximately 100kW to 125kW (400V system). The 4P 250A 200A Molded Case Circuit Breaker is the most suitable choice for floor distribution boxes, large equipment group power supplies, data center column cabinets, and other scenarios.

Users can choose the most suitable model based on accurate calculation of load current, avoiding the cost and space waste caused by "big horse pulling small car", and achieving the optimal balance between protection benefits and investment benefits.

When a large number of single-phase nonlinear loads (such as IT servers, LED lighting) cause the third harmonic to overlap on the neutral line, the full current protection capability of the 4P 250A 200A Molded Case Circuit Breaker N-pole can prevent the hidden and dangerous fire hazard of neutral line overload heating.

During maintenance or repair, by disconnecting this circuit breaker, synchronous and absolute isolation of all live conductors (L1, L2, L3, N) can be achieved, creating an absolutely safe electrical environment for operators and meeting the mandatory requirements for isolation integrity in TN-S and other systems.

Any pole (including the N pole) that detects an overload or short circuit fault will trigger a four pole synchronous instantaneous disconnection, ensuring that the fault is completely isolated and preventing the accident from escalating.

Application:

As the main distribution circuit breaker for standard floors of office buildings and large retail stores under the TN-S system, it meets safety regulations and protects mixed loads of lighting and sockets. 

The input switch of the column head cabinet in the medium-sized data center provides power to downstream server cabinets and manages the neutral line harmonic current generated by IT loads. 

The power supply incoming protection in the control center of the automated production line has mixed loads such as motors (three-phase) and controllers (single-phase) on the production line.

The SPX SM50-250 Series Of Moulded Case Circuit Breaker MCCB Parameter

Frame(A)		SM50-250(NF-CV)
Rated current In(A)		100、125、140、150、160、175、200、225、250
Rated voltage(V)		AC 400V
Rated insulation voltage(V)		AC 690V
Number of poles		3			4
Limited breaking capacity		C	S	H	C	S	H
Short circuit interrupting capacity(kA) AC400V		18	30	50	18	30	50
Operate short circuit(kA) AC400V		9	15	25	9	15	25
Profile picture
	a	165			165
	b	105			140
	c	90			90
Mounting picture
	d	126			126
	e	35			35
	f	5			5
Machine life		4000
Electrical life		2000
Electrical-operation device(MD)		●
Extemal rotary handle		●
Automatic tripping device		Thermal-magnetic