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250A Overload Protection DC Moulded Case Circuit Breaker

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Product Introduction

TM1Z-250, this type of Moulded case DC circuit breakers are suitable for large photovoltaic systems and energy storage systems, with load isolation and overload/short-circuit protection, also for infrequent switching during normal line operation, and can quickly disconnect DC system fault currents to ensure the stable operation of inverters, junction boxes and battery banks.

Yuming Electric’s TM1Z-250 is designed for direct current control circuit applications for the overcurrent protection of appliances or electrical equipment. We are committed to design products that meets the requirement and standards of PV sector.


Product Parameter

Model

TM1Z-250

Rated current In(A)

125,140,160,180,200,225,250

Rated working voltage Ue(V)DC

250V, 500V, 750V, 1000V

Rated insulation voltage Ui(V)

1000V

Rated impulse withstand voltage Uimp(kV)

8kV

Test pressure for one minute(V)

3550

Ultimate short circuit breaking capacity(kA)Icu

(Ics=75%Icu)

250V

20

500V

20

750V

20

1000V

20

Mechanical life

Total number of times

7000

Electrical life

Total number of times

2000

Total breaking time (ms)

20

20

Mounting position

Any position

Availability of isolation characteristics

Yes

Standard

IEC60947-2、IEC60947-1、GB14048.1、GB14048.2

Permissible ambient temperature

-25℃~+50℃

Protection class

IP20

Available with accessories

Auxiliary, alarm, sub-excitation, hand-operated, electrically operated, mechanical interlock

Arcing distance(mm)

≧50

Instantaneous action value

12In

Mounting method

Fixed, insertion type


Features

It has overload and short-circuit protection. Its purpose is to protect the safety of circuits in solar systems.

It can be used in photovoltaic solar power, UPS, Battery , DC switching power supply system,distribution Apparatusand other applications.


FAQ

Q:Is voltage important for DC breakers?

A:You need to keep the voltage below 32V, but not because the breaker will trip if you have a voltage higher than that. The problem is that if the voltage is too high when the breaker trips, it may not be able to stop the current because of the arcing.


Q:How do I choose an MCCB?

A:Load. The current carrying capacity (In, A) of the circuit breaker should be higher than the expected load in the circuit.



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