Adjustable voltage-stabilizing automatic power-off relay

Abstract

The invention provides an adjustable voltage-stabilizing automatic power-off relay which comprises a shell, a voltmeter, a power-on switch, a load device, a resistance regulator, a capacitor and a power-off switch, a power input part and a power output part are arranged on the shell, and the power-off switch is electrically connected with the power input part, one side of the power-on switch and the load device. The other side of the power-on switch is electrically connected with the load, the resistance regulator and the capacitor. The voltmeter is fixedly connected to one side of the shell, faces the outside and is connected with the power output part in parallel. According to the invention, the load device is adopted to consume an out-of-range input voltage, and meanwhile, the capacitor is used to carry out follow current on power utilization of an external electric appliance, so that continuous operation of the external electric appliance is guaranteed; and the resistance regulator is adopted to regulate the voltage output by the power supply output part so as to adapt to the requirements of various electric appliances, so that a user can have multiple purposes, and relay resources are saved.

Description

technical field [0001] The invention relates to the technical field of relays, in particular to an adjustable voltage-stabilizing automatic power-off relay. Background technique [0002] The relay is an electrical control device, which is an electrical appliance that causes the controlled quantity to undergo a predetermined step change in the electrical output circuit when the change of the input quantity meets the specified requirements. It has an interactive relationship between the control system and the controlled system. [0003] At present, the output voltage of the relay cannot be manually adjusted at will, and the output voltage can only be changed by means of an external circuit through a series resistor. Different relays are required for electrical appliances corresponding to different voltage requirements, which reduces the number of relays of the same type. The scope of application is not conducive to saving resources. [0004] The existing relays will directly...

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Problems solved by technology

[0003] At present, the output voltage of the relay cannot be manually adjusted at will, and the output voltage can only be changed by an external circuit through a series resistor. Different relays are required for electrical appliances corresponding to different voltage requirements, which reduces the number of relays of the same type. The range of application is not conducive to saving resources

[0004] The existing relays will directly cut off the electrical appliances when the input voltage exceeds the tolerance range, and sometimes the input voltage is only temporarily beyond the tolerance range of the relay (instantaneous boost caused by lightning strikes), at this time the relay will The power is still cut off, which will cause trouble when the user uses the electrical appliance, which is not conducive to the user's continuous use of the electrical appliance

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