Basic parameters, working principle and purpose:

The DDB-AB125-AB200 pull-out free tripping single-phase circuit breaker products work on the principle of bimetallic electric thermal tripping. The circuit breaker is used for overload or short circuit protection in aircraft AC/DC distribution systems.

Environmental adaptability:

• Surrounding medium temperature: (-55~70) ℃

• Sinusoidal vibration: frequency range (10-2000) Hz

• Acceleration: 10g

• Impact: 30g

Electrical performance:

• Extreme action current

At 25 ℃, the maximum holding current of the product is 100% of the rated current, and the minimum tripping current is 150% of the rated current

At 70 ℃, the maximum holding current of the product is 80% of the rated current, and the minimum tripping current is 145% of the rated current

-At 55 ℃, the maximum holding current of the product is 110% of the rated current, and the minimum tripping current is 180% of the rated current

• Overload current and action time

  
  

• life

5000 working cycles under AC resistive load; 2500 cycles of inductive load operation

5000 working cycles under DC resistive load

• Breaking ability

DC 3000A; Communication 2500 A

Exterior installation dimensions: