What is the function of the gap? What is the working principle of air switch?

Everyone will install certain circuit protection devices when decorating the circuit. Open circuit is one of the circuit protection devices. Thank you. Circuit protection devices are also called circuit breakers. Circuit breaker is a kind of protective device that automatically cuts off the circuit when abnormal current and voltage appear in use. If these protective devices are installed in the circuit, the circuit can be protected when the circuit is abnormal, and it will not have a great impact on the family. The following is a detailed introduction of Bian Xiao's role in air circuit opening.

principle of operation

There are three tripping modes: thermal tripping, electromagnetic tripping and compound tripping.

When the line is generally overloaded, the overload current can not make the electromagnetic trip work, but it can make the thermal element generate a certain amount of heat, make the bimetal bend upward when heated, push the lever to disengage the hook from the lock, disconnect the main contact and cut off the power supply. When the line is short-circuited or the current is seriously overloaded, the short-circuit current exceeds the instantaneous tripping setting current value, and the electromagnetic release generates enough suction force to attract the armature to impact the lever, so that the hook rotates upward around the rotating shaft seat and disengages from the lock catch, and the lock catch disconnects three pairs of main contacts and cuts off the power supply under the action of the reaction spring.

Function of air switch

Under normal circumstances, the armature of the overcurrent release is released; In case of serious overload or short circuit fault, the coil connected in series with the main circuit will generate strong electromagnetic attraction, which will attract the armature downwards and push the unlocking hook to disconnect the main contact. The working principle of undervoltage release is just the opposite. When the voltage is normal, electromagnetic attraction attracts the armature and the main contact is closed. Once the voltage drops seriously or the power is cut off, the armature is released and the main contact is disconnected. When the power supply voltage returns to normal, it must be switched on again to work, thus realizing voltage loss protection.

Conditions of use

Ambient temperature: upper limit of ambient temperature+40℃; The lower limit of ambient air temperature is-5℃; The average ambient temperature for 24 hours should not exceed +35℃.

Altitude: The altitude of the installation site shall not exceed 2000m.

Atmospheric conditions: When the ambient air temperature is +40℃, the relative humidity of the atmosphere shall not exceed 50%; It can have higher relative humidity at lower temperature; The monthly average maximum relative humidity in the wettest month is 90%, and the monthly average minimum temperature in this month is +25℃, considering the dew condensation on the product surface caused by temperature change. Pollution level: the pollution level is level 3.

Through the above introduction, everyone must have a certain understanding of the circuit breaker. Opening is a very advanced circuit breaker, which has its own advantages compared with traditional circuit breakers. But it is not suitable for every kind of circuit. When choosing a circuit breaker, you must choose the most suitable circuit breaker according to your actual situation. There are many different brands and manufacturers in the market, and the mass quality of different brands is also uneven. Here Bian Xiao recommends you to choose some big brands, because the quality and after-sales service of big brands are more reliable. I hope Bian Xiao's introduction can bring some help to everyone.

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