Ycm8-Hu Series Photovoltaic DC 3p 1000V MCCB Molded Case Circuit Breaker

Product Description

Product Description General
YCM8-HU series AC molded case circuit breaker is suitable for AC grid circuits with rated voltage up to AC1140V and rated current of 800A. The circuit breaker has the functions of overload long-time delay protection and short-circuit instantaneous protection, and is used to distribute electric energy and protect lines and power supply equipment from overload, short circuit and other faults.
Features
Ultra-wide breaking capacity:
rated working voltage up to AC1140V and rated current up to 800A. Under AC800V working conditions, Icu=Ics=36.5KA, ensuring reliable short-circuit protection.
Ultra-long arc-extinguishing chamber:
the arc-extinguishing chamber has been improved as a whole, with more arc- extinguishing plates, greatly improving the product's breaking characteristics.
Application of narrow-slot arc-extinguishing technology:
advanced current-limiting and narrow-slot arc-extinguishing technology is applied, which enables the high voltage and high short-circuit current to be cut off very quickly, facilitating the extinguishing of the arc in the shortest possible time, effectively limiting the energy and current peak, and greatly reducing damage to cables and equipment caused by short-circuit currents
Selection

250	S	HU	/	3	125A	AC800
Shell frame current	Breaking capacity	Product type	/	Number of poles	Rated current	Rated voltage
250(63~250) 320(250~320) 400(225~400) 630(500~630) 800(700~800)	S: Standard breaking N: Higher breaking	HU: AC high voltage	/	3	63, 80, 100, 125 140, 160, 180 200, 225, 250 280, 315, 320 350, 400, 500 630, 700, 800	AC800 AC1140

Technical data

Model				YCM8- 250HU				YCM8- 320HU				YCM8- 400HU
Appearance
Shell frame current Inm(A)				250				320				400
Number of poles of products				3				3				3
AC working voltage(V)				415	690	800	1140	415	690	800	1140	415	690		800		1140
Rated insulation voltageUi(V)				AC1150				AC1150				AC1150
Rated impulse withstand voltage Uimp(KV)				8				8				12
Rated current In(A)				63, 80, 100, 125, 140, 160, 180, 200, 225, 250				280, 315, 320				225, 250, 315, 350, 400
Ultimate short-circuit breaking capacity Icu (kA)			S	85	50	36.5	10	85	50	36.5	10	85		50		36.5		10
			N	/				/				100		60		50		15
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)				3000	3000	2000		3000	3000	2000		1000		1000		700
Mechanical life(time)				20000				20000				10000
Standard				IEC/EN60947-2
Attached accessories				Shunt,Alarm,Auxiliary,Manual operation,Electric operation
Certifications				CE
Overall dimension (mm)	W		Width(W)	107				107				182
			Height(H)	180				180				250
			Depth(D)	126				126				165

Technical data

Model				YCM8-630HU				YCM8-800HU
Appearance
Shell frame current Inm(A)				630				800
Number of poles of products				3				3
AC working voltage(V)				415	690	800	1140	415	690	800	1140
Rated insulation voltageUi(V)				AC1150				AC1150
Rated impulse withstand voltage Uimp(KV)				12				12
Rated current In(A)				500, 630				630,700, 800
Ultimate short-circuit breaking capacity Icu (kA)			S	85	50	36.5	10	85	50	36.5	10
			N	100	60	50	15	100	60	50	15
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	1000	700	1000	1000	1000	700
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)	182				182
			Height(H)	250				250
			Depth(D)	165				165

Auxiliary contact
Auxiliary contact current parameters

Rated current of shell frame grade	Agreed heating current Ith	The rated working current at AC 400V
Inm<320	3A	0.30A
Inm>400	6A	0.40A

Shunt release
Generally installed in the Phase A of the circuit breaker, when the rated control power voltage is between 70% - 110%, the shunt releaseshall make the circuit breaker trip reliably under all operating conditions.
Control voltage: conventional: AC 50Hz, 110V, 230V, 400V, DC 24V.
Note: when the power supply of the control circuit is DC24V, the following figure is recommended for the design of the shunt control circuit.
KA: DC24V intermediate relay, contact current capacity is 1A
K: the microswitch in series with the coil inside the release aid is a normally closed contact. When the circuit breaker is disconnected, the contact will automatically disconnect and close when it is closed.
Overall and mounting dimension of external accessories
Model and specification of rotating operating handle mechanism

Model	H	B	B1	A	A1	D
YCM8-250/320HU	188.5	116	126	90	35	4.2
YCM8-400/630/800HU	244	176	194	130	48	6.5

Model	L	A		B	C	E
		Without zero arcing cover	With zero arcing cover			Without zero arcing cover	With zero arcing cover
YCM8-250HU	40	100	165	40	40	100	165
YCM8-320HU	40	100	165	40	40	100	165
YCM8-400HU	40	100	165	40	40	100	165
YCM8-630HU	40	100	165	40	40	100	165
YCM8-800HU	40	100	165	40	40	100	165

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