MT-M1 3/4P AC Molded Case Circuit Breaker, 63A–1600A, Reliable Electrical Protection Suppliers, Factory - Zhejiang Mingtuo Electrical Technology Co., Ltd.

MT-M1 3/4P AC Molded Case Circuit Breaker, 63A–1600A, Reliable Electrical Protection

Description:

The MT-M1 series molded case circuit breaker (MCCB) is engineered to deliver reliable protection and control in AC 50Hz power distribution systems, with rated operational voltages up to 400V and currents ranging from 63A to 1600A. Designed to safeguard circuits and connected equipment, the MT-M1 efficiently interrupts overloads, short circuits, and undervoltage conditions, while also managing occasional motor starting without compromising system integrity.

Compact yet robust, this MCCB features a superior breaking capacity and minimal arcing, ensuring long-term operational reliability. Its modular design allows both vertical and horizontal mounting, providing flexible installation in tight electrical panels or motor control centers. Fully certified to IEC 60947-2 and GB14048.2, the MT-M1 meets international quality and safety standards.

Applications:

The MT-M1 MCCB provides dependable protection in diverse electrical systems, including:

Main and secondary power distribution panels

Motor control centers and starter panels

Generator protection circuits

Industrial and manufacturing machinery

Commercial and residential electrical installations

Solar and wind energy integration systems

Working Principle:The working principle of the MT-M1 series MCCB is to monitor circuit current and, in the event of overload, short circuit, or ground fault, automatically determine and trigger the mechanism to quickly interrupt the circuit. It also safely extinguishes the arc through an arc-extinguishing system, thereby reliably cutting off the fault and protecting the circuit and equipment.

MCCB

MCCB Assemble
MCCB Assemble
MCCB Temperature Rise Test Bench
MCCB Temperature Rise Test Bench
MCCB Temperature Rise Test Bench
MCCB Temperature Rise Test Bench
MCCB Temperature Rise Test Bench
MCCB Instantaneous Test

To ensure transportation safety, our electrical products are exported in reinforced wooden crates. The crates undergo heat treatment and bear the ISPM-15 mark, enabling swift customs clearance. The raised base design facilitates forklift operation, while internal shock-absorbing fastening ensures the products arrive intact. All exterior crates are clearly labeled and comply with international logistics standards.

High and Low Voltage Switchgear (ACB, MCCB, VCB)
Box-Type Substation Featuring Our VCB, MCCB, and ACB
High And Low Voltage Cabinets Successfully Powered

Box-typesubstation ACB VCB MCCB
Power transmission successful
Photovoltaic Grid-Connected Cabinet Utilising ACB and MCCB
Box-typesubstation ACB VCB MCCB
Box-typesubstation ACB VCB MCCB
HighandLowVoltageSwitchgearACBMCCBVCB
Box-typesubstationUtilisingourVCB
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Type	pole	External Dimensions						Installation Dimensions (mm)			Rear Panel Connection Dimensions (mm)
		L	L1	W	H	H1	H2	a	b	∅d	a1	b1	d1	H3	H4
MTM1-63L	3	135	21	76	89.5	72	18	25	117	3.5	25	117	18	52	75
	4			103
MTM1-63M	3			76	99	81	28
	4			103
MTM1-125L	2	150	51	65	87	68	24	…	129	4.5	30	132	22	65	100
	3			92				30
	4			121				…
MTM1-125M,H	2			65	103.5	85	23	…
	3			92				30
	4			121				…
MTM1-250L	2	164	64	75	108	87	24	…	126	5.5	35	144	24	70	110
	3			107				35
	4			142				…
MTM1-250M,H	2			75	124.5	104	24	…
	3			107				35
	4			142				…
MTM1-400M,H	3	257	105	150	153	106	38	44	194	7	48	224	32	48.5	108.5
	4			197				Left 44 Right 50
MTM1-630M,H	3	270	105	182	157	111	43	58	200	7	58	234	40	70	120
	4			240
MTM1-800M,H	3	280	105	210	158	116	42	70	243	7	70	243	48	75	125
	4			280

Type	MTM1-63		MTM1-125			MTM1-250
lnmFrameInm（A）	63		125			250
Rated current(A）	10、16、20、25、32、40、50、63		16、20、25、32、40、50、63、80、100、125			100、125、140、160、180、200、225、250
Rated voltage Ue(V)	AC400		AC400	AC400 / AC690	AC400	AC400	AC400 / AC690	AC400
Rated insulation voltageUi(V)	AC800		AC800			AC800
Number of poles	3、4	3、4	2、3、4	2、3、4	2、3、4	2、3、4	2、3、4	2、3、4
IcukA） Rated limit short-circuit breaking capacity level	L	M	S	L	M	S	L	M
IcukA） Rated limit short-circuit breaking capacity	12	35	12	35	50	12	35	50
Ics（kA） Rated short-circuit breaking capacity	6	22	6	22	35	6	22	35
Ratedlimitshort circuit breaking capacity	4500		3000			2500
Operation life(cycle)	8500		7000			6500
Arcing distance (mm）	0、< 50		0、< 50			< 50
Dimensions
Installation size

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Wholesale MT-M1 3/4P AC Molded Case Circuit Breaker, 63A–1600A, Reliable Electrical Protection

MT-M1 3/4P AC Molded Case Circuit Breaker, 63A–1600A, Reliable Electrical Protection