YCM8-PV Photovoltaic DC MCCB

Features

● Ultra-wide breaking capacity:
rated working voltage up to DC1500V and rated current up to 800A. Under DC1500V working conditions, Icu =Ics=20KA, ensuring reliable short-circuit protection.
● Small size:
for frame currents up to 320A, the 2P rated working voltage can reach DC1000V, and for frame currents of 400A and above, the 2P rated working voltage can reach DC1500V.
● 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

Note: The tripping type of this product is thermal-magnetic type
The working voltage of YCM8-250/320PV 2P is DC1000V; The working voltage of 3P is DC1500V; YCM8-400/630/800PV 2P and 3P can work under DC1500.

Accessory selection

Technical data

Model				YCM8- 125PV		YCM8- 250PV			YCM8- 320PV
Appearance
Shell frame current Inm(A)				125		250			320
Number of poles of products				2		2		3	2		3
DC working voltage(V)				250	500	500	1000	1500	500	1000	1500
Rated insulation voltageUi(V)				DC1000		DC1250		DC1500	DC1250		DC1500
Rated impulse withstand voltage Uimp(KV)				8		8		12	8		12
Rated current In(A)				50, 63, 80, 100, 125		63, 80, 100, 125,140, 160, 180, 200, 225, 250			280, 315, 320
Ultimate short-circuit breaking capacity Icu (kA)			S	40	40(5ms)	50	20	20	50	20	20
			N	/		/			/
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)				5000	3000	3000	2000	1500	3000	2000	1500
Mechanical life(time)				20000		20000			20000
Standard				IEC/EN60947-2
Attached accessories				Shunt、Alarm、Auxiliary、Manual operation、Electric operation
Certifications				CE
Overalldimension (mm)			Width(W)	64		76		107	76		107
			Height(H)	150		180			180
			Depth(D)	95		126			126

Note: ① 2P connection in series, ② 3P connection in series

Technical data

Model				YCM8- 400PV				YCM8-630PV				YCM8- 800PV
Appearance
Shell frame current Inm(A)				400				630				800
Number of poles of products				2			3	2			3	2			3
DC working voltage(V)				500	1000	1500	1500	500	1000	1500	1500	500	1000	1500	1500
Rated insulation voltageUi(V)				DC1500				DC1500				DC1500
Rated impulse withstand voltage Uimp(KV)				12				12				12
Rated current In(A)				225, 250, 315,350, 400				400,500,630				630,700,800
Ultimate short-circuit breaking capacity Icu (kA)			S	65	35	15	15① 20②		35		15① 20②	65	35	15	15① 20②
			N	70	40	20	20① 25②				20① 25②	70	40	20	20① 25②
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	700	500					1000	1000	700	500
Mechanical life(time)				10000								10000
Standard				IEC/EN60947-2
Attached accessories				Shunt、Alarm、Auxiliary、Manual operation、Electric operation
Certifications				CE
Overalldimension (mm)			Width(W)	124			182	124			182	124			182
			Height(H)	250				250				250
			Depth(D)	165								165

Note: ① 2P connection in series, ② 3P connection in series

Accessories

Accessory code	Accessory name	125PV	250/320PV	400/630/800PV
SD	Alarm contact
MX	Shunt release
OF	Auxiliary contact(1NO1NC)
OF+OF	Auxiliary contact(2NO2NC)	-	-
MX+OF	Shunt release+ Auxiliary contact(1NO1NC)
OF+OF	2 sets of auxiliary contacts(2NO2NC)			-
MX+SD	Shunt release + Alarm contact	-	-
OF+SD	Auxiliary contact + Alarm contact
MX+OF+SD	Shunt release Auxiliary contact(1NO1NC)+ Alarm contact	-	-
OF+OF+SD	2 sets of auxiliary contacts(2NO2NC)+Alarm contact

Auxiliary contact

Auxiliary contact current parameters

Auxiliary contact and its combination

When the circuit breaker is in the ”off” position
When the circuit breaker is in the ”on” position

Alarm contact

Alarm contact and its combination

Alarm contact Ue=220V, Ith=3A
When the circuit breaker is   in the ”off”and ”on”position
When the circuit breaker is in the ”free trip” position

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, 110V, 220V.
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.

Wiring diagram

Installation method and overall dimension of external accessories

Model and specification of rotating operating handle mechanism

Schematic diagram of hole opening of rotating operating handle

Overall and mounting dimension of external accessories

Model and specification of rotating operating handle mechanism

Outline and installation dimension diagram of CD2

Wiring diagram

Wiring diagram

Overall and mounting dimensions(mm)

YCM8-125PV

YCM8-250PV、320PV

YCM8-400PV、630PV、800PV

Installation drawing of YCM8-PV with arcing cover

Safety distance when installing circuit breaker

Temperature correction factor table

Note: 1. When the ambient temperature is lower than 50 ℃, the product can be used normally without derating;
2. The above derating factors are measured at the rated current of the shell frame.

Use of derating table at high altitude

Curve