A miniature dual-way power switcher with lightning protection

Abstract

The invention relates to a lightning protection miniature dual-channel power supply switching device which comprises a casing upper cover and a casing base. A rectangular input port is arranged in the back side of the casing upper cover. A rectangular output port is arranged in the front side of the casing upper cover. An indication light window is arranged in the surface of the casing upper cover. A circuit board is arranged in the casing base. An input terminal is arranged on the rear side of the circuit board. The input terminal is dual-channel. A wiring hole of the input terminal is embedded in the input port of the casing upper cover. An output terminal is arranged on the front side of the circuit board. A wiring hole of the output terminal is embedded in the output port of the casing upper cover. A control circuit and a light emitting tube are arranged in the circuit board. A mounting chuck is arranged on the side of the bottom of the casing base. According to the invention, the lightning protection miniature dual-channel power supply switching device has the advantage of small volume, and can control the switching time of two power supplies; the phenomenon of arcing caused by two-phase common zero power supply switching is avoided; and the performances of lightning protection and surging protection of the whole machine are improved.

Description

technical field [0001] The invention relates to the technical field of power switching, in particular to a miniature dual-way power switch with lightning protection. Background technique [0002] In important workplaces and important electrical equipment, it is necessary to ensure that the working power supply cannot be interrupted at all times, so at least two input power sources must be used for power supply, one of which is the main power supply and the other is the backup power supply, which is automatically switched through the dual power supply device or switcher to ensure the continuous operation of electrical equipment; when both power supplies are normal, the main power supply is connected to the electrical equipment, and the backup power is disconnected; when the main power fails and loses power, the backup power is connected to the electrical equipment , the main power supply is disconnected; when the main power supply is restored to power, the main power supply i...

AI Technical Summary

Problems solved by technology

[0003] At present, for the power supply of some small electronic equipment and precise control devices, it is often necessary to select a small dual-way power switch to ensure the power supply, but the switch made of AC contactors or thyristors cannot be made larger. Very small, if a smaller AC relay is used for power switching, the load on the contacts is insufficient, and it cannot solve the problem of "arcing" between lines when switching between two-phase and zero-phase dual-circuit power sources. In addition, the power line's Lightning disturbances and surge spikes from power switching are also not appreciated in small dual power switchers

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