Control apparatus and control method thereof, circuit breaker

Abstract

The invention, which belongs to the field of the low-voltage electric technology, discloses a control apparatus comprising a direct-current power supply, a first controller, a second controller, and a control signal detection unit. The control signal detection unit consists of at least two signal collectors; each signal collector includes a first resistor, a second resistor, and a controllable switch, wherein the first resistor, the second resistor, and the controllable switch are successively connected with the positive electrode of the direct-current power supply. The other end of the controllable switch is connected with the negative electrode of the direct-current power supply and a power negative input terminal of the first controller in a common ground connection mode; a control terminal of the controllable switch is connected with a signal output terminal of the first controller; a node between the first resistor and the second resistor is connected with a signal input terminal of the second controller; and a power positive input terminal of the first controller is connected with the positive electrode of the direct-current power supply. In addition, the invention also discloses a control method of the control apparatus and a circuit breaker. According to the invention, the control channel expansion is realized based on the simple circuit structure; and the control apparatus, the control method, and the circuit breaker can be widely applied to similar fields of circuit breaker contact output devices and the like.

Description

technical field [0001] The invention relates to a control device, in particular to a control device, a control method thereof and a circuit breaker, belonging to the technical field of low-voltage electrics. Background technique [0002] In the low-voltage power distribution system, many users need to provide additional fault alarm functions through the programmable output contacts provided by the circuit breaker, such as overload long-delay fault alarm, short-circuit short-delay fault alarm, short-circuit instantaneous fault alarm, ground fault Call the police, etc. In recent years, circuit breakers are developing in the direction of diversification of functions, and the user's demand for the number of programmable output contacts is increasing. [0003] In the existing various circuit breaker products, the realization of the programmable output contacts is generally through the following methods. Using one pin of the microprocessor in the circuit breaker controller to co...

AI Technical Summary

Problems solved by technology

When the user needs multiple relays, the communication serial port is used for expansion. However, with the increase in circuit breaker functions, the communication serial port resources of the processor are getting tighter and tighter. How to expand the number of relays it controls is a technical problem.

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