• Parameters

  • Details

  • Size&weight

  • Related

  • Video

  • Message

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℃
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
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
Negative grounding Negative grounding
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



QUICK SIZING

The cross-sectional area of the TXCM1Z connecting wire and the corresponding rated current

Rated current (A) 10 16 12 25 32 40 50 63 80 100 125 140 160 180 200 225 250 315 350 400
Wire 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
Sectional area (mm²) Quantity Size mmxmm Quantity
500 150 2 30×5 2
630,700 185 2 40×5 2
800 200 2 40×5 2


OUTLINE AND INSTALLATION DIMENSIONS


view and download

File name(Click to view)File typefile sizeView timesClick to download

Product related news

News titlePromulgatorRelease timeView timesClick to read