Safety controller applied to circuit overload protection

Abstract

The invention provides a safety controller applied to circuit overload protection. The safety controller comprises an installation housing, a circuit protection device and a knob reset device. The circuit protection device comprises a traction column, an installation support and protection mechanisms. The protection mechanisms are used for fusing melt in the protection mechanisms when the circuitis abnormal and achieving the purpose of protecting the circuit, a plurality of groups of the protection mechanisms are arranged, the melt in the protection mechanism in work is fused, the protectionmechanism is matched with the traction column and enables the next group of the protection mechanism to automatically replace the protection mechanism after the melt is fused, the knob reset device comprises a knob switch, a closing mechanism and a wiring mechanism, the wiring mechanism is used for being connected with the circuit in series, the knob switch is used for being manually opened and closed by a user, and the closing mechanism is used for receiving opening and closing signals of the knob switch and finally matched with the wiring mechanism to control opening and closing of corresponding electrical equipment.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a safety controller applied to circuit overload protection. Background technique [0002] The protection switch is a safety device connected in the circuit. It is mainly used to disconnect the circuit when abnormal faults such as overload and short circuit occur in the circuit, so as to avoid damage to the circuit or corresponding electrical equipment. At present, the commonly used protection switches are generally based on bimetallic strips. It is deformed by heat and finally separates the dynamic and static contacts to achieve the purpose of disconnecting the circuit, but the elastic recovery of the bimetal is limited. After exceeding the elastic recovery limit, it is likely to cause the bimetal to bounce fatigue, or due to abnormal current The resulting contact fusing and adhesion lead to the failure of the protection switch to work normally. For this reason, the inventor designed a pr...

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Problems solved by technology

[0002] The protection switch is a safety device connected in the circuit. It is mainly used to disconnect the circuit when abnormal faults such as overload and short circuit occur in the circuit, so as to avoid damage to the circuit or corresponding electrical equipment. At present, the commonly used protection switches are generally based on bimetallic strips. It is deformed by heat and finally separates the dynamic and static contacts to achieve the purpose of disconnecting the circuit, but the elastic recovery of the bimetal is limited. After exceeding the elastic recovery limit, it is likely to cause the bimetal to

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