Molded Case Circuit Breaker - MCCB

XYCM1L(M1L) MCCB Molded-Case-Circuit-Breaker 125A-800A

JINGE CM1L (M1L) series residual current molded case circuit breaker (MCCB) is an industrial-grade combined protection device integrating leakage protection, overload protection and short-circuit protection. Developed based on the mature CM1 MCCB platform and upgraded with high-sensitivity residual current release, this breaker is specially designed for industrial and commercial distribution systems requiring electric shock safety protection, fire prevention and equipment leakage monitoring.

CM1L MCCB operates reliably under AC 50/60Hz, 400/415V industrial power grid, covering rated current from 100A to 630A. It effectively detects leakage current caused by insulation aging, cable damage and equipment failure, and trips instantly to avoid electric shock accidents, electrical fire hazards and equipment burnout. Fully compliant with IEC 60947-2 and leakage protection standards, it is the most popular leakage MCCB model for overseas engineering projects and low-voltage distribution matching.

Key Adventages

– Three-in-one integrated protection: Combines leakage residual current protection, overload long-time delay protection and short-circuit instantaneous protection in one unit, realizing full-range circuit safety control for industrial main and branch circuits.
– Fast leakage tripping & fire prevention: Quick response to leakage fault within 0.1s, effectively preventing electrical fire, electric shock injury and equipment damage caused by insulation deterioration in humid, dusty and harsh industrial environments.
– Mature and stable MCCB base platform: Adopts the same reliable mechanical structure and breaking performance as standard CM1 MCCB, with high short-circuit breaking capacity, strong anti-interference and low failure rate.
– Adjustable leakage sensitivity options: Supports 100mA, 300mA, 500mA and 1A residual current setting, suitable for personal protection, fire protection and equipment anti-leakage different requirements.
– Industrial-grade flame-retardant and durable structure: High-strength engineering plastic shell, heat-resistant, impact-resistant and anti-aging, suitable for long-term continuous operation in factories, construction sites and outdoor distribution occasions.
– Compatible installation and wiring flexibility: Standard MCCB size and mounting method, compatible with existing distribution cabinets, easy replacement and on-site wiring, no need to modify cabinet design.
– Most mainstream CE certified model for foreign trade: CM1L is the most widely used leakage MCCB in Yueqing for CE testing, with complete test reports, smooth customs clearance and high recognition by global buyers and engineering contractors.

Main Technical Parameters

XYCM1L Series Residual Current Circuit Breaker Parameter Table

Model	XYCM1L-125	XYCM1L-250	XYCM1L-400	XYCM1L-630	XYCM1L-800
Frame Current INM(A)	125	250	400	630	800
Rated Current IN(A)	10、16、20、32、40、50、63、80、100	100、125、160、180、200、225	225、250、315、350、400	400、500、630	630、700、800
Rated Insulation Voltage Ui(V)	800	800	800	800	800
Rated Operating Voltage Ue(V)	230/400	230/400	230/400	230/400	400
Rated Impulse Withstand Voltage Uimp(KV)	8	8	8	8	8
Pole Number	2、3、4	2、3、4	2、3、4	2、3、4	2、3、4
Breaking Capacity Level	L、M、H	L、M、H	L、M	L、M、H	L、M
Ultimate Short-Circuit Breaking Capacity Icu(KA)AC400V	35、50、65	35、50、65	45、65	45、65	45、65
Service Short-Circuit Breaking Capacity Ics(KA)AC400V	22、30、35	22、30、35	25、25	22、30、35	22.5、32.5
Arc Distance(mm)	50	50	50	100	–
Operating Performance (Times)	Times/Hour：120	Times/Hour：60	Times/Hour：60	Times/Hour：60	Times/Hour：20
Operating Performance (Times)	Energized：1500 De-energized：8500	Energized：1000 De-energized：7000	Energized：1000 De-energized：4000	Energized：1000 De-energized：4000	Energized：1000 De-energized：4000
Rated Residual Operating Current △n(mA)	100、300、500
Residual Current Protection Operating Time	1I△n	2I△n	–	5I△n	10I△n
Maximum Breaking Time(S)	Non-delayed：0.2	Non-delayed：0.1	–	Non-delayed：0.04	Non-delayed：0.04
Maximum Breaking Time(S)	Delayed：0.5/1.15/2.15	Delayed：0.35/1/2	–	Delayed：0.25/0.9/1.9	Delayed：0.25/0.9/1.9
Ultimate Non-operating Time(ms)Delayed	60/500/1000

Applicastion Scenarios

CM1L (M1L) leakage molded case circuit breaker is mainly used for industrial workshops, factory main power incoming lines, commercial complex distribution rooms, construction site temporary power distribution, mining and chemical engineering projects, agricultural irrigation equipment and public infrastructure power supply systems. It is specially applied for circuits requiring both overload/short-circuit protection and residual current fire prevention and electric shock protection. For global electrical distributors and engineering contractors, CM1L is the most cost-effective and most commonly specified leakage MCCB model for project bidding and low-voltage complete cabinet matching. It perfectly solves the core pain points of customers such as strict local electrical safety regulations, mandatory leakage fire protection requirements, and difficult certification and customs clearance.

Working Condition

Normal Operating Conditions

1. Ambient air temperature: The upper limit shall not exceed +40℃, the lower limit shall not be lower than -5℃, and the 24-hour average value shall not exceed +35℃.

2. The altitude of the installation site shall not exceed 2000m.

3. At the maximum temperature of +40℃, the relative humidity of the air shall not exceed 50%. Higher relative humidity is allowed at lower temperatures, e.g., 90% at 20℃. Special measures shall be taken for condensation occasionally caused by temperature changes.

4. Pollution degree: 3.

5. Installation category: Category II.

6. The circuit breaker should generally be installed vertically.

7. The external magnetic field of the circuit breaker installation site shall not exceed 5 times the earth’s magnetic field in any direction.

More Parameters

Inverse Time Delay Tripping Characteristics of Molded Case Circuit Breakers for Distribution

Test Current Name	Setting Current Multiple In	Conventional Time h		Initial State
		In≤63A	In>63A
Conventional Non-tripping Current	1.05	≥1	≥2	Cold State
Conventional Tripping Current	1.30	<1	<2	Hot State

The rated current of the instantaneous release for short-circuit protection is 10In with a standard tolerance of 20%.

Mechanical and electrical operating performance .

Operating Cycle Times

Frame Grade Rated Current Inm(A)	Operating Cycles per Hour	With Current	Without Current	Total Times
100	120	1500	8500	10000
225	120	1000	7000	8000
400	60	1000	4000	5000
630	60	1000	4000	5000

The overcurrent limit value that does not cause tripping in the main circuit is 6In.

The circuit breaker shall not malfunction under the impact voltage of 6kV.

Electric operating mechanism: When the circuit breaker is operated by the motor, it can reliably operate at any voltage between 85% and 110% of the rated control current voltage.

Shunt release: When the power supply voltage is any value between 70% and 110% of the rated control voltage, operating the shunt release can make the circuit breaker operate reliably.

Undervoltage release: When the power supply voltage is between 35% and 70% of the rated control voltage, the undervoltage release shall operate. When the power supply voltage is lower than 35%, the undervoltage release shall prevent the circuit breaker from closing. When the power supply voltage is equal to or greater than 85% of the rated working voltage of the undervoltage release, the circuit breaker shall be guaranteed to close reliably.

10. Arc distance ≤50mm (XYCM1L-100/225), ≤80mm (XYCM1L-400/630).

11. Cross-sectional area of connecting wires for circuit breakers (see Table 5 and Table 6)

Table 5 Matching Cross-sectional Area of Connecting Wires for Rated Current ≤400A

Rated Current(A)	16/20	25	32	40/50	63	80	100	125/140	160	180/200/225	250	315/350	400
Wire Cross-sectional Area (mm²)	2.5	4	6	10	16	25	35	50	70	95	120	185	240

Table 6 Matching Cross-sectional Area of Connecting Wires for Rated Current ≤630A

Rated Current(A)	Cable Cross-sectional Area		Copper Bar Size
	Quantity	Cross-sectional Area(mm²)	Quantity	Size(mm×mm)
500	2	150	2	30×5
630	2	185	2	40×5

Installation and Use

1. Before installation, check whether the shell, handle, terminals, etc. of the circuit breaker are damaged, and verify that the technical data on the nameplate is consistent with the protected equipment.

2. The circuit breaker must be installed in accordance with regulations: 1, 3, 5 represent the power supply terminal, 2, 4, 6 represent the load terminal, and N represents the neutral pole.

3. When leaving the factory, the operating handle of the circuit breaker is in the free tripping position (middle position). To “open” or “close” the circuit breaker, first pull the operating handle to the “open” position to make the operating mechanism “re-engage”, then perform the “open” or “close” operation.

4. When adjusting the residual operating current and residual current breaking time according to actual conditions, the rotary switch should be adjusted to the required position. The overload protection, short-circuit protection, undervoltage release and shunt release of the circuit breaker have been adjusted according to technical requirements at the factory and sealed with red paint at the adjustment points, and shall not be adjusted by the user.

5. The residual current operation test of the circuit breaker shall be carried out once a month. Test method: When the circuit breaker is energized, press the test button to make the circuit breaker operate; tripping of the circuit breaker is qualified. If the circuit breaker cannot open when the test button is pressed, it indicates that the residual current protection function is lost, and the circuit breaker should be immediately removed and sent to the manufacturer for repair.

6. After the circuit breaker trips automatically, the cause must be identified and the fault eliminated before power can be supplied again.

Install Dimension

Outline and Installation Dimensions of Front Panel Wiring for Circuit Breakers

Model	Pole Number	Outline Dimensions				Installation Dimensions
		L1	L2	L3	L4	a	b	Φd
XYCM1L-125L	3	92max	150max	110max	90max	30±0.14	129±0.32	4×Φ4.5
XYCM1L-125L	4	122max	150.5max	92max	72max	60±0.28	129±0.32	6×Φ4.5
XYCM1L-125L	2	62max	150.5max	110max	90max	/	129±0.32	2×Φ4.5
XYCM1L-125L	3	92.5max	150.5max	110max	90max	30±0.14	129±0.32	4×Φ4.5
XYCM1L-125L	4	122.5max	150max	94max	89.5max	60±0.28	129±0.32	6×Φ4.5
XYCM1L-250	3	107max	165.5max	110max	88max	35±0.16	126±0.32	4×Φ4.5
XYCM1L-250	4	142max	165.5max	92max	72max	70±0.32	126±0.32	6×Φ4.5
XYCM1L-250	3	107max	165.5max	110max	88max	35±0.16	126±0.32	4×Φ4.5
XYCM1L-250	2	75max	165.5max	110max	88max	/	126±0.32	2×Φ4.5
XYCM1L-250	4	142max	165.5max	107.5max	88max	70±0.32	126±0.32	6×Φ4.5
XYCM1L-400L, M	3	150max	258max	150max	105max	44±0.20	195±0.32	4×Φ7
XYCM1L-400L, M	4	198max	258max	150max	106max	88±0.40	195±0.32	6×Φ7
XYCM1L-630L, M	3	212max	282max	152max	108max	70±0.20	243±0.50	4×Φ7
XYCM1L-630L, M	4	282max	282max	152max	110max	140±0.40	243±0.50	6×Φ7

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