Molded Case Circuit Breaker - MCCB

XYCM1 MCCB Molded-Case-Circuit-Breaker 63A-1250A Transparent case

The CM1 series molded case circuit breakers are mainly applicable to AC 50Hz circuits with a rated working voltage up to 690V and a rated working current up to 1250A, for power distribution and motor protection. Circuit breakers for power distribution are used to distribute electric energy in the power distribution network and provide overload, short-circuit and under-voltage protection for lines and power supply equipment; circuit breakers for motor protection provide overload, short-circuit and under-voltage protection for motors in the circuit. Featured with small volume, high breaking capacity, short arcing distance and vibration resistance, the breakers can be installed vertically (vertical mounting) or horizontally (horizontal mounting), and are widely used in the power distribution systems of construction, electric power, metallurgy, petrochemical, mining and other industries.

Main Technical Parameters

Item	XYCM1-63	XYCM1-100	XYCM1-125	XYCM1-250	XYCM1-400	XYCM1-630	XYCM1-800
Frame Current Inm (A)	63	100	125	250	400	630	800
Rated Current In (A)	(6), 10, 16, 20, 25, 32, 40, 50, 63	10, 16, 20, 32, 40, 50, 63, 80, 100	80, 100, 125	100, 125, 160, 180, 200, 225, 250	225, 250, 315, 350, 400	400, 500, 630	630, 700, 800
Rated Insulation Voltage Ui (V)	500	690	800	800	690	690	690
Rated Operating Voltage Ue (V)	400	400	230 / 400	230 / 400	400	400	400
Rated Impulse Withstand Voltage Uimp (kV)	6	6	8	8	6	6	6
No. of Poles	3 / 4	3 / 4	2 / 3 / 4	2 / 3 / 4	3 / 4	3 / 4	3 / 4
Breaking Class	L / M	L / M	L / M / H	L / M / H	L / M	L / M	L / M
Ultimate Breaking Capacity Icu (kA) AC400V	10 / 15 / 35	35 / 50	35 / 50 / 65	35 / 50 / 65	45 / 65	45 / 65	50 / 65
Service Breaking Capacity Ics (kA) AC400V	5 / 10 / 25	25 / 30	25 / 30 / 50	25 / 30 / 50	22.5 / 32.5	22.5 / 32.5	25 / 32.5
Arc Flash Distance (mm)	≤50	≤50	≤50	≤50	≤100	≤100	≤100
Operating Cycles / Hour	120	120	120	120	60	60	20
Mechanical Life With Load	4000	3000	3000	1500	1500	1000	500
Mechanical Life No Load	6000	7000	7000	6500	6500	4000	2500

Working Condition

Ambient air temperature: The upper limit does not exceed +40℃, the lower limit is not lower than -5℃, and the average temperature within 24 hours does not exceed +35℃;
Altitude: The altitude of the installation site does not exceed 2000m;
Atmospheric conditions: The relative humidity of air at the installation site does not exceed 50% at the maximum temperature of +40℃, and a higher relative humidity is allowed at lower temperatures. The monthly average maximum relative humidity of the wettest month is 90%, while the monthly average minimum temperature of the month is +25℃, taking into account the condensation on the product surface due to temperature changes;
Pollution degree: Pollution degree is Grade 3;
Installation conditions: Installed in a place without significant shaking, impact and vibration, can be installed vertically or horizontally, and the inclination of the installation direction from the vertical direction does not exceed 5°;
Power supply conditions: The voltage deviation does not exceed ±10% of the rated working voltage, and the frequency deviation does not exceed ±5% of the rated frequency.

Characteristics of Overcurrent Protection

Overcurrent Inverse Time Protection Characteristics for Distribution Protection

Test Current Name	I/Ih	Conventional Time (Ih≤63)	Conventional Time (63<In≤250)	Conventional Time (In≥250)	Initial State	Ambient Temperature
Conventional Non-Tripping Current	1.05	≥1h	≥2h	≥2h	Cold State	+30℃
Conventional Tripping Current	1.30	<1h	<2h	<2h	Hot State	+30℃
Recoverable Time	3.0	5s	8s	12s	Cold State	+30℃

Overcurrent Inverse Time Protection Characteristics for Motor Protection

Test Current Name	I/Ih	Conventional Time (10≤In≤250)	Conventional Time (250≤In≤630)	Initial State	Ambient Temperature
Conventional Non-Tripping Current	1.0	≥2h	≥2h	Cold State	+40℃
Conventional Tripping Current	1.2	<2h	<2h	Hot State	+40℃
–	1.5	≤4min	≤8min	Cold State	+40℃
Recoverable Time	7.2	4s≤T≤10s	6s≤T≤20s	Hot State	+40℃

Setting Value of Overcurrent Release Under Short Circuit Condition

Inm (A)	For Distribution	For Motor Protection
63, 100, 125, 250, 400	10In	12In
630	5In and 10In	–
800	10In	–

Electric Operating Mechanism

(1) The rated operating voltage of the electric operating mechanism includes: AC50Hz 110V, 230V; DC110V, 220V and other types.

(2) The power consumption of the motor of the electric operating mechanism is shown in Table 7.

Circuit Breaker for Matching	Starting Current (A)	Power Consumption (W)	Circuit Breaker for Matching	Starting Current (A)	Power Consumption (W)
XYCM1-63	≤5	1100	XYCM1-400	≤5.7	1200
XYCM1-100(125)	≤7	1540	XYCM1-630	≤5.7	1200
XYCM1-125	≤8.5	1870	–	–	–

Installation, Use and Maintenace

1. Close and open the circuit breaker several times to check whether the operating mechanism of the circuit breaker is stuck and whether the mechanism action is reliable.

2. The “N”, “1”, “3”, “5” of the breaker are incoming terminals, and “N”, “2”, “4”, “6” are outgoing terminals, which are not allowed to be installed reversely.

3. The cross-sectional area of the connecting wire selected for the circuit breaker wiring must be adapted to the rated current. For the cross-sectional area of the main circuit wire when using copper wire or copper bar, refer to Table

Rated Current (A)	10	16 20	25	32	40 50	63	80	100	125 140	160	180 200 225	250	315 350	400
Wire Cross-Sectional Area (mm²)	1.5	2.5	4	6	10	16	25	35	50	70	95	120	185	240

Rated Current (A)	Cable			Copper Bar
–	Cross-Sectional Area (mm²)	Quantity	Size (mm×mm)	Size (mm×mm)	Quantity
500	150	2	30×5	–	2
630	185	2	40×5	–	2
800	240	3	50×5	–	2

Confirm that the terminal connections and fixing screws are tight and free of looseness before use.

The single-mounted circuit breaker shall be vertically fixed in a dry and ventilated place. It shall be easy to maintain and operate, with a distance of ≥1.5 meters from the ground.

6. Confirm that there is no short circuit or ground fault between the terminals or exposed live parts.

7. After the circuit breaker trips due to overload, check the cause to eliminate the fault, and reset the bimetallic sheet inside the circuit breaker before closing and energizing.

Installation height of electric operating mechanism

Install Dimension

Outline and Installation Dimensions

Type	Item	XYCM1-63		XYCM1-100, 125		XYCM1-250		XYCM1-400		XYCM1-630		XYCM1-800
Type	Item	L	M	L	M	L	M	L	M	L	M	L	M
Front Wiring	W	78		92		107		150		182		210
	W1	50		60		70		96		118		140
	W2	103		122		142		198		240		280
	W3	75		90		105		144		174		211
	L	135		150		165		257		270		280
	L1	169		185		295		456		476		490
	L2	117		132		144		224		234		243
	H	74	82	68	86	86	103	107	107	112	116	116	116
	H1	90.5	98.5	86	104	110	127	155	155	160	168	168	168
	H2	20.5		24		24		38		42		41.5
	H3	52		63		52		60.5		61		74
Rear Wiring	H4	75		103		97		120.5		121		74
	W4	60		72		87		124		156		178
	W5	85		102		122		172		214		–
	φd1	5.5		5.5		5.5		6.5		7		7
	φD	18		22		24		32		40		48
	L3	87		90		93		164		164		158
Plug-in	L4	90		87		83		160		177		177
	L5	146		172		190		282		302		–
	L6	85		101.5		117		151		226		226
	H5	28		50		50.5		60.5		91		91
	H6	36		64		71.5		83.5		92		–
	H7	–		76		86.5		106.5		110		–
	H8	–		17.5		17.5		21		21		–
	K	60		62		54		128		142		142
	C	50		60		70		60		105		105
	φd2	5.5		6.5		6.5		8.5		12		12
	M	5		8		8		12		14		14
	A	25		30		35		44		58		70
	B	117		129		126		194		200		243
Installation Dimensions	φd	3.5		4.5		4.5		7		7		7