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Automatic Switch, Also Known As Automatic Air Switch
Aug 11, 2017

  Automatic switch, also known as automatic air switch. When the circuit occurs serious overload, short circuit and loss of pressure and other failures, can automatically cut off the fault circuit, effectively protect the string in the back of their electrical equipment. Under normal circumstances, the automatic switch can also be less frequently connected and disconnect the circuit and control the motor directly start. Therefore, the automatic switch is a low-voltage circuit commonly used with the protection of the broken electrical.

  The main parameters of the automatic switch

  Rated voltage

  Refers to the automatic switching in the normal operation of the allowable safety voltage. Add voltage at both ends of the automatic switch is greater than this value, will cause the two contacts between the spark breakdown.

  Rated current

  Refers to the maximum safe current that is allowed to pass when the automatic switch is switched on. When this value is exceeded, the automatic switch contact will burn out due to excessive current.


  Refers to the automatic switch between the conductor and the ground can withstand the minimum voltage.

  Insulation resistance

  Refers to the automatic switching of the conductor part and the insulation part of the resistance value. Insulation resistance should be more than 100MΩ.

  Contact resistance

  Refers to the automatic switch in the open state, the resistance between each pair of contacts. General requirements in the 0.1-0.5Ω below, the smaller the value the better.

  Life expectancy

  Refers to the automatic switch in the normal working conditions, the number of operations can be. General requirements in 5000-35000 times or so.

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