Basic parameters, working principle and purpose:

The DDB-Atwo5A50 pull-out free tripping single-phase circuit breaker product works on the principle of bimetallic electric thermal tripping and has a temperature compensation structure, which can be used in a wide temperature range. The circuit breaker is used for overload or short circuit protection in aircraft AC/DC distribution systems.

Environmental adaptability:

• Surrounding medium temperature: (-55~70) ° C

• Random vibration: frequency range (152000) Hz, functional test value W₀=0.07 g²/Hz

• Impact: 15g

• Acceleration: Performance test value 10g; Structural strength test value 13.5g

• Cannon vibration: broadband values (T1~T3) and narrowband values (P1~P4) are shown in the following table

Electrical performance:

Extreme action current

• At 20 ° C, 70 ° C, and -55 ° C, the maximum holding current of the product is the rated current

• At 20 ℃, the minimum tripping current of the product is 140% of the rated current

• -At 55 ℃, the minimum tripping current of the product is 180% of the rated current

Overload current and action time

• Under standard atmospheric pressure conditions, the overload current and action time of the product are specified in the following list

• life

When the rated current and power factor are cos φ>; Under the condition of 0.5, connect and disconnect 3000 working cycles

• Breaking ability

DC 3000 A; Exchange 1500 A

External dimensions: