80/100/150/250/300/400 Amp DC Circuit Breaker & DC MCCB

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TXCM1Z Molded Case Circuit Breaker

Moulded Case Circuit Breaker | MCCB

SKYPE:TAIXI ELECTRIC Please contact with me in 8:00-18:00(GMT+8)
MAIL:sales@txele.com Leave your message, we will reply soon.
WHATSAPP:+86-15669851253 You can send messages, pictures, videos

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SCOPE OF APPLICATIONV

TXCM1Z Molded Case Circuit Breaker (16A~250A, 225A~400 amp or 400 amp~ 630A DC Circuit Breaker, PV DC MCCB) is used for low-voltage power generation, transmission and distribution lines of rated voltage of DC500V, 750V and 1000V, rated current of 16A~250A, 225A~400 amp or 400 amp~ 630A to provide isolation, overload and short circuit protection, DC MCCB can also be used for infrequent making and breaking of circuits under normal circumstances.
The DC MCCB are widely used in photovoltaic power generation systems, wind power generation systems, roof building power generation systems, rail transit power distribution systems and infrastructure construction and other low-voltage DC generation, transmission and distribution application occasions.

TWO RELEASE METHODS

Protection function	Frame size	Rated current In (A)	Short-circuit protection current setting Ir (A)	Operation time
Operation time	TXCM1Z-250	16-250	10In	Instantaneous operation
	TXCM1Z-400	225-400	10In
	TXCM1Z-2630	400-630	10In
Operating tolerance	±20%

Thermal + electromagnetic release

Protection function	Frame size	Rated current In (A)	Short-circuit protection current setting Ir (A)	Operation time
Operation time	TXCM1Z-250	16-250	10In	Instantaneous operation
	TXCM1Z-400	225-400	10In
	TXCM1Z-2630	400-630	10In
Operating tolerance	±20%

Protection function	Protection function	Rated current In (A)	Operating characteristics
Overload protection	All series	16~630	According to I²t operation 1.05In (Cold), no operation within 1h (In≤63A) 1.3In (Hot), ≤1h operation (In≤63A) 1.05In (Cold), no operation within 2h (In>63A) 1.3In (Hot), ≤2h operation (In>63A)

ALTITUDE

●Altitude of TXCM1Z DC MCCB installation place in normal work is not more than 2000m.
●If you need to install it at an altitude of more than 2000m, which can be used according to the altitude factor derating table.

Derating factor of altitude corresponds to the circuit breaker

Altitude (m)	2000	3000	4000	5000
Rated frequency withstand voltage	U	U	U	U
Max operating voltage	Ue	Ue	Ue	Ue
Rated operating current	ln	0.97In	0.93In	0.89In

TEMPERATURE

●Can be used in the lowest temperature of -25℃, the highest temperature of +40℃.
●If they need to work at less than -25℃ or higher than +40℃, you can use them according to temperaturecompensation factor table.
●Consult with the manufacturer when using at less than -25℃ or more than +40℃.

Ambient temperature changes in the temperature compensation factor table

Ambient temperature Coefficient Model	+40℃	+45℃	+50℃	+55℃	+60℃
Ambient temperature Coefficient Model	Derating factor	Derating factor	Derating factor	Derating factor	Derating factor
-250	1In	0.96In	0.96In	0.87In	0.82In
-400	1In	0.94In	0.87In	0.81In	0.73In
-630	1In	0.93In	0.88In	0.83In	0.76In

Note: The above derating factors are measured at current value equal to the frame rated current

HUMIDITY

● In the ambient air temperature of +40℃, atmospheric relative humidity can not exceed 50%, if the temperature is low, you can use it under high humidity conditions.
● The monthly average relative humidity of the wettest month is 90%, and the effect of condensation on the productsurface should be considered.

STANDARDS AND CERTIFICATION

International standard		International standard
Product standard	G
IEC 60947-1 (General rules)	G	B 14048.l
IEC 60947-2 (Circuit breaker)	G	B 14048.2
IEC 60947-3(Switch, Isolation)	G	B 14048.3

Extreme environmental test standard		National standard
Extreme environmental test standard	G	B/T 2423.l
IEC 60068-2-2	G	B/T 2423.2
IEC 60068-2-11	G	B/T 2423.17
IEC 60068-2-30	G	B/T 2423.4

MAIN TECHNICAL PARAMETERS

Model of circuit breaker		TXCM1Z-250		TXCM1Z-400		TXCM1Z-630
Frame rated current (A)		250		400		630
Electrical performance
Pole (P)		3	4	3	4	3	4
Rated current In (A)		16/20/25/32/40/SOI 63/80/100/125/140/ 160/180/200/2251250		225/250/315/350/400		400/500/630
Rated insulation voltage Ui (V)		1000		1000		1000
Rated impulse voltage Uimp (V)		8000		8000		8000
Rated operating voltage Ue (V)		DC500	DC750	DC500	DC750	DC500	DC750
		DC750	DC1000	DC750	DC1000	DC750	DC1000
DC1000		≤50		≤100		≤100
Rated ultimate short-circuit breaking capacity Icu (kA)	DC500	65	-	65	-	65	-
	DC750	40	50	40	50	40	50
	DC1000	-	40	-	40	-	40
Rated operating short-circuit breaking capacity Icu(kA)	DC500	100%Icu	-	100%Icu	-	100%Icu	-
	DC750	50%Icu	100%Icu	50%Icu	100%Icu	50%Icu	100%Icu
	DC1000	-	50%Icu	-	50%Icu	-	50%Icu
Rated short-circuit making capacity Icm (kA)		100%Icu		100%Icu		100%Icu
Use category		A		A		A
Electrical life (times)		5000		1000		1000
Mechanical life (times)	Maintenance-free	10000		5000		5000
	Have maintenance	20000		10000		10000
Connection and installation
Outline dimensions (mm)	Width (3P/4P)	107/142		150/198		182/240
	Length	165		257		270
	Height	104.5		104.5		108.5

TIME / CURRENT CHARACTERISTIC CURVE

WIRING MODE

Different power system / load wiring mode

Rated operating voltage	Power / load wiring mode
Rated operating voltage	Ungrounded system				Negative grounded system
DC500	E	-	-	-	E	-	-	-	-
DC750	E		-	-	-	-	-	-	-
DC1000	-	-	-	H	-	-	-	H	H

Note: (1) In the negative grounded system, the wiring must be according to the above table.
(2) In the ungrounded system and the neutral point grounded system, use the wiring on the table. User pagecan exchange the positive and negative based on the actual situation, but also can exchange wiring positionof the power supply and load.

DC SYSTEM APPLICATIONS

Choosing circuit breakers in a DC system need to mainly consider the following aspects:
● Rated operating voltage, consider the breaking poles in series
● Rated current, consider the load power
● Breaking capacity, consider the max short-circuit current at the installation point

System type		Grounding system		Ungrounded system
System type		Negative grounding	Negative grounding	Ungrounded system
Various fault types
Fault effect	Fault 1	Produce maxshort-circuit current,contact connecting to the positivepole of the power supplyis off	U/2 voltage produces the nearest max short-circuit current,contact connecting to the positive pole of the power supply is off	No effect
	Fault 2	Produce max short-circuit current, but the contacts in series are broken	Produce max short-circuit current, but the contacts in series are broken	Produce max short-circuit current, but the contacts in series are broken
	Fault 3	Produce max short-circuit current, but the contacts in series are broken	The same as the fault I, but only for contacts connecting to the negative pole of the power supply	No effect
The worst situation		Fault I	Fault I and II	Fault II
Breaking poles situation		Can be connected to the positive pole in series, carry out the breaking together	For every pole,carry out the breaking of the maximum short-circuit current at U/2	The poles carry out the breaking together

OUTLINE AND INSTALLATION DIMENSION

Type/Installation location / Poles / Accessory name	TXCM1Z-250		TXCM1Z-400		TXCM1Z-630
	3P	4P	3P	4P	3P	4P
Nothing	-		-		-
Shunt release
Auxiliary contact
Undervoltage release
Shunt release Auxiliary contact
Shunt release Undervoltage release
Two sets of auxiliary contact
Undervoltage release Auxiliary contact Auxiliary contact
Alarm contact
Shunt release Alarm contact
Auxiliary contact Alarm contact
Undervoltage release Alarm contact
Shunt release Auxiliary+Alarm contact
Two sets of auxiliary contact Alarm contact
Undervoltage release Auxiliary+Alarm contact