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:
