Single phase circuit breaker for power lines/electrical equipment

Basic parameters, working principle and application: The DDB-A25A~A50A pull-out free tripping single-phase circuit breaker products work on the bimetallic electric thermal tripping principle and have a temperature compensation structure, which can be used in a wide temperature range. Circuit breakers not only provide overload and short-circuit protection for power lines or electrical equipment, but also have the function of monitoring the on/off status of products. Environmental adaptability: Surrounding medium temperature: (-55~70) ℃ Relative humidity: 95% in high temperature and high humidity section at 60 ℃, 95% in low temperature and high humidity section at 30 ℃ Working height: Maximum operating height 18500m; Maximum height

Basic parameters, working principle and purpose:

58彩票The DDB-A25A~A50A pull-out free tripping single-phase circuit breaker products operate based on the bimetallic electric thermal tripping principle and have a temperature compensation structure, which can be used in a wide temperature range. Circuit breakers not only provide overload and short-circuit protection for power lines or electrical equipment, but also have the function of monitoring the on/off status of products.

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Environmental adaptability:

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

  • 58彩票Relative humidity: reaching 95% at 60 ℃ in the high temperature and high humidity section

    95% at 30 ℃ in the low-temperature and high humidity section

  • Working height: maximum usable height 18500m; Maximum height 25000m

  • Random vibration: frequency range: (15~2000) Hz, functional test value: W0=0.07g2/Hz

  • 58彩票Impact: 15g

  • 58彩票Acceleration: Performance test value 10g; Structural strength test value 13.5g

  • 58彩票Cannon vibration: The wideband values (T1~T3) and narrowband values (P1~P4) of the cannon vibration test spectrum are shown in the following table

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Technical requirements:

  • Extreme action current

a) The maximum holding current of the product at 20 ℃, 70 ℃, and -55 ℃ is the rated current.

58彩票b) At 20 ℃, the maximum operating current of the product is 140% of the rated current.

c) At -55 ℃, the maximum operating current of the product is 180% of the rated current.

  • Inverse time characteristic

Vicorv High-Reliability Electronic Components

Vicorv High-Reliability Electronic Components

  • life

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

  • Breaking ability

a) DC interruption: 3000A

b) Communication interruption: 1500A

Exterior installation dimensions:

Vicorv High-Reliability Electronic Components