A switching surge protector

Abstract

The invention discloses a switch-type surge protector, comprising a protector casing, wherein a hot-melt action component, a varistor (2) and a resistance bracket (3) for fixing the varistor (2) are arranged in the protector casing, The varistor (2) is fixed in the protector housing through a resistance bracket (3); the lower end of the varistor (2) is provided with two protector terminals (4), and the two sides of the varistor (2) are respectively A conductive sheet (5) is provided; the hot-melt action component includes a fixed iron core (6) and a coil winding (7), the fixed iron core (6) is fixed on the inner wall of the protector shell, and the coil winding (7) is wound around Outside the fixed iron core (6), one end of the coil winding (7) is electrically connected to one of the protector terminals (4) of the varistor (2). The beneficial effects are as follows: to ensure reliable grounding of the surge protector, and to prevent the connection between the ground wire and the terminal of the surge protector 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 larger 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 the discharge of lightning strikes, dangerous overvoltage may occur within the range of 1.5 to 2KM with the lightning strike as the center. Lightning-induced (external) surges are characterized by single-phase pulses with enormous energy. The voltage of an external surge can rapidly rise from a few hundred volts to 20,000V in a few microseconds and can be transmitted over considerable distances. 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 surges outside the syste...

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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