DC MCCB 125A ZMM1-125DC

The ZMM1 series molded case circuit breakers (hereinafter referred to as “circuit breakers”) are one of the new-type circuit breakers developed by our company using mature design and manufacturing technologies. With a rated insulation voltage of 800V, they are suitable for circuits with an alternating current of 50Hz, a rated operating voltage of 690V and below (400V for ZMM1-63), and a rated operating current up to 800A, used for infrequent conversion and infrequent starting of motors. The circuit breakers have overload, short-circuit, and undervoltage protection functions, which can protect the circuits and power supply equipment from damage.The product in the picture is the DC MCCB 125A (Model: ZMM1-125DC).

How Does a DC MCCB Work?

A DC molded case circuit breaker monitors the circuit status in real time through its built-in current sensing components and mechanical actuating mechanism. Once a fault (overload/short circuit) is detected, it immediately triggers a tripping action to cut off the circuit, thereby protecting downstream equipment and lines.

Advantages

Excellent DC breaking capacity
Stable performance in DC systems
Strong environmental adaptability
High safety and reliability
Flexible application scenarios
Convenient installation and maintenance

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ZMM1	MX	1	AC230V
Model	Accessories	Adapter shell frame	Accessory voltage
ZMM1	OF: Auxiliary contact MX: Shunt release SD: Alarm module Z: Manual operation mechanism P: Electric operating mechanism TS2: Terminal shield 2P TS3: Terminal shield 3P	1: 250/320 、 2: 400/630/800	MX: AC110V、 AC230V、 AC400V、 DC24V、 DC110V、 DC220V 、	P: AC400V、 AC230V、 DC220V

Technical data

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Model		ZMM1-630PV				ZMM1-800PV
Shell frame current Inm(A)		630				800
Number of poles of products		2			3	2			3
DC working voltage(V)		500	1000	1500	1500	500	1000	1500	1500
Rated insulation voltage Ui(V)		DC1500				DC1500
Rated impulse withstand voltage Uimp(KV)	Rated impulse withstand voltage Uimp(KV)	12				12
Rated current In(A)		500,630				700,800
Ultimate short - circuit breaking capacity Icu (kA)	S	63	35	15	15/20	65	35	15	15/20
	N	70	40	20	20/25	70	40	20	20/25
Running short - circuit breaking capacity Ics(kA)		Ics = 100%Icu
Wiring method		Up in and down out, down in and up out, Down in and up out, up in and down out(3P)

Isolation function		Yes
Tripping type		Thermal - magnetic type
Electrical life(time)		1000	1000	700	500	1000	1000	700	500
Mechanical life(time)		5000				5000
Standard		IEC/EN60947 - 2
Attached accessories		Shunt,Alarm.Auxiliary,Manual operation,Electric operation
Certifications		CE
Overall dimension (mm)	Width(W)	124			182	124			182
	Height(H)	250				250
	Depth(D)	165				165