Switch type surge protector

Abstract

The invention discloses a switch type surge protector, which comprises a protector shell, wherein a hot melting action assembly, a piezoresistor (2) and a resistor bracket (3) for fixing the piezoresistor (2) are arranged in the protector shell, the piezoresistor (2) is fixed in the protector shell through the resistor bracket (3), the lower end of the piezoresistor (2) is provided with two protector terminals (4), two sides of the piezoresistor (2) are respectively provided with a conducting sheet (5), the hot melting action assembly comprises a fixed iron core (6) and a coil winding (7), thefixed iron core (6) is fixed on the inner wall of the protector shell, the coil winding (7) is wound outside the fixed iron core (6), and one end of the coil winding (7) is electrically connected with one protector terminal (4) of the piezoresistor (2). According to the invention, the grounding reliability of the surge protector is guaranteed, and the connection between the grounding wire and thewiring end of the surge protector is prevented from loosening after being pulled.

Description

technical field [0001] The invention relates to a switch-type surge protector, which belongs to the field of electrical equipment. Background technique [0002] Inrush current refers to the peak current or overload current that is much greater than the steady-state current when the power is turned on or when the circuit is abnormal. The surge caused by lightning strikes is the most harmful. During lightning discharge, dangerous overvoltage may be generated within 1.5~2KM centered on the lightning strike. Lightning-induced (external) surges are characterized by single-phase pulses of enormous energy. The voltage of the external surge can quickly rise from several hundred volts to 20000V in a few microseconds, which can be transmitted over a considerable distance. According to ANSI / IEEE C62.41-1991, the instantaneous surge can be as high as 20000V, and the instantaneous current can reach 10000A. According to statistics, the surge outside the system mainly comes from the imp...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: when the circuit is inspected or maintained, the wiring of the circuit is pulled out from the wire harness groove, and the grounding wire of the surge protector is easily pulled at this time, so that the surge protector The connection between the ground wire and the terminal of the surge protector is loose, which may easily cause poor ground contact and cannot discharge the overcurrent to the ground. The problem that the connection between the two is loose after being pulled

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