M3 Moulded Case Circuit Breaker

XUCKY Electric is a large M3 Moulded Case Circuit Breaker manufacturer and supplier in China. For many years, we have been specializing in Modular Electrical Terminal Equipment, our products have good price advantage and cover most of the European and American markets. We are looking forward to being your long-term partner in China.

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Product Description

China XUCKY Electric customized 1P, 2P, 3P, 4P 400V/415V Moulded case circuit breaker high quality with ASTA, KEMA, SEMKO, CE, CB, ROHS certificate.

The M3 moulded case circuit breakers are intended for conducting current in normal mode and switching it off at short circuits, overload, inadmissible bucking as well as operational actuation and tripping of electric circuit parts. They are designed for use in electric units having the operative voltage limited to 400V per rated current from 12,5 to 1600A.

They correspond to the requirements of EN 60947-1, EN 60947-2

Thermal-Magnetic Circuit Breakers:

Thermal protection function:(For protection under over load conditions)

Bimetal, which provides thermal protection, consists of combination of two metals with different extension coefficients under heat. When bimetal is heated, it bends towards the metal with less extension. In this way, a notch that assists opening of the breaker mechanism is released to disable the breaker. Bending speed of bimetal is in direct proportion with size of the current passing through the breaker. Because, increase of current means increase of heat. In this way, over current protection function of the breaker is fulfilled by bimetal at load currents higher than the rated current

Magnetic protection function (For protection under short circuit conditions)

Another function of the breaker is to protect the connected circuit against short circuits. Short circuit may occur as a result of contact of phases with each other or contact of phase-ground. Since a very high current shall pass through the cables in case of short circuit, system energy should be broken in a shorter time due to thermal protection. Breaker should perform instant opening to protect load it is connected to. The part fulfilling this function is a mechanical opening mechanism that operates with magnetization caused by the magnetic area formed by the short circuit current

Advantages

● Easy independent installation of auxiliary devices:

▷ Alarm contact;

▷ Auxiliary contact;

▷ Under voltage release;

▷ Shunt release;

▷ Handle operating mechanism;

▷ Electrical operating mechanism;

▷ Plug-in device;

▷ Draw-out device.

● Standard set of each circuit breaker consists of connecting busbars or cable lugs, phase separators, a set of screws and nuts for its mounting onto an installation panel.

● With the help of special clamp 125 and 160 units can be installed onto a DIN-rail.

● Weight and dimensions of these circuit breakers are by 10-20% less than that suggested by other home manufacturers. This fact provides for mounting smaller boxes and panels. Besides, small dimensions make it possible to change old circuit breakers to M3.

Application

Moulded case circuit breakers are low-voltage circuit breakers. They meet the installation needs of small users all the way to large industrial substations and power distribution systems. They are commonly applied in steel mills, oil platforms, hospitals, railway systems, airports, computing centers, office buildings, convention centers, theaters, skyscrapers, and other large scale structures.

Electrical parameters of M3 MCCB molded case circuit breaker

hermal-magnetic fixed type MCCB
	Model	code	Icu (KA)	Ics (KA)	Rated Current-In	Ui(V)	Ue(V)	Pole	Uimp(V)
1	M3-160	B	25	18.75	10 - 12,5 - 16 - 20 - 25 - 32 - 40 - 50 - 63- 80 - 100 - 125-160A	500V	230V	1P	10000
		N	36	27
2	M3-200	B	25	18.75	10 - 12,5 - 16 - 20 - 25 - 32 - 40 - 50 - 63- 80 - 100 - 125-160(200)A	750V	400V	2P	10000
		N	36	27
3	M3-125	B	25	12.5	10 - 12,5 - 16 - 20 - 25 - 32(30) - 40 - 50 - 63(60) - 80 - 100 - 125A	750V	400V	3P / 4P	10000
		N	35	17.5
		S	50	37.5
4	M3-160	B	25	12.5	10- 12,5-16-20 - 25 - 32 - 40 - 50 - 63 - 80 - 100 -125 - 160(150)A	750V	400/415V	3P / 4P	8000
		N	35	26.25
		S	50	37.5
5	M3-250	N	35	26.25	63 - 80-100-125 - 160(180) - 200(225) - 250(320)A	750V	400/415V	3P /4P	8000
		S	50	37.5
		H	65	48.75
		G	85	51
6	M3-630(400)	N	35	26.25	250 - 315 (350)- 400 - 500 - 630A	750V	400/415V	3P /4P	8000
		S	50	37.5
		H	70	52.5
		G	85	52.5
7	M3-800	N	35	35	400 - 500 - 630 (700)- 800 -1000A	750V	400/415V	3P /4P	8000
		S	50	37.5
		H	70	52.5
		G	85	52.5
8	M3-1600	S	65	50	800 -1000 - 1250 - 1600A	750V	400V	3P / 4P	8000

·Icu:O-t-CO test(O:Open maneuver,CO:Close-Open maneuver,t:Waiting duration)

·Ics:O-t-CO-t-CO test(O:open maneuver,CO:Close-Open maneuver,t:Waiting duration)

ON/I Position:It indicates that contacts of the breaker are closed. In this position, the breaker lever is in the top position

TRIP Position:It indicates that the breaker is opened due to any failure (over load or short circuit). In this case, breaker lever is in the middle position between ON and OFF positions. In order to take the breaker, which is in trip position, to ON position; push the breaker lever downwards as shown by the OFF sign

Breaker shall be set with "click" sound.After that, pull the lever as shown by ON sign to close the breaker

OFF/0 Position:It indicates that contacts of the breaker are open. In this way, the breaker lever is in the bottom position.

Physical parameters of M3 MCCB molded case circuit breaker

Category (EN 60947-2/IEC 60947-2)				Endurance
Model	Pole	Dielectric Propery (V)	lonization distance (mm)	Total Cycles	Electrical Life	Mechanical Life	Main circuit	Auxiliary circuit
M3-160	1P	2500	≤30/0	20000	3000	17000	A/0	AC-15
M3-200	2P	2500	≤30/0	15000	2500	12500	A/0	AC-15
M3-125	3P / 4P	2500	≤30/0	8000	1000	7000	A/0	AC-15
M3-160	3P / 4P	3000	≤30/0	8000	1000	7000	A/0	AC-15
M3-250	3P / 4P	3000	≤30/0※	8000	1000	7000	A/B	AC-15
M3-630(400)	3P / 4P	3000	≤60/0※	5000	1000	4000	A/B	AC-15
M3-800	3P / 4P	3000	≤80/0※	5000	1000	4000	A/B	AC-15
M3-1600	3P / 4P	3000	≤80/0※	3000	500	2500	A/B	AC-15

Size of MCCB molded case circuit breaker

Model	Pole	Outline dimension (LXWXH)
M3-160	1P	120x30x70mm
M3-200	2P	120x60x70mm
M3-125	3P	120x76x70mm
M3-125	4P	120x101x70mm
M3-160	3P	120x90x70mm
M3-160	4P	120x120x70mm
M3-250	3P	170x105x103.5mm
M3-250	4P	170x140x103.5mm
M3-630(400)	3P	254x140x103.5mm
M3-630(400)	4P	254x184x103.5mm
M3-800	3P	268x210x103.5mm
M3-800	4P	268x280x103.5mm
M3-1600	3P	410x210x138.5mm
M3-1600	4P	410x280x138.5mm