Circuit for automatic time-delay conduction after switch tripping

Abstract

The invention provides a circuit for automatic time-delay conduction after switch tripping. The circuit is composed of a first input terminal, a second input terminal, a third input terminal, a change-over output terminal, a first voltage detection module, a second voltage detection module, a voltage conversion module, a comparison determination module, a driving module, a switch connection module, a power supply module and a standby switch, wherein the first input terminal, the second input terminal, the third input terminal, and the output terminal are independent to each other. The change-over output terminal serving as a standby switch output terminal connected to the third input terminal is connected with a rear-end load. The first voltage detection module is connected with the first input terminal electrically; the second voltage detection module is connected with the second input terminal electrically; the outputs of the first voltage detection module and the second voltage detection module are connected with the voltage conversion module; and the input of the comparison determination module is connected with the output terminal of the voltage conversion module. The circuit has the following beneficial effect: automatic time-delay conduction after once tripping can be provided for a monitoring switch.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a circuit for automatically delaying conduction after a switch trips. Background technique [0002] A number of circuit breakers with short-circuit protection function are usually installed in the low-voltage power distribution box or low-voltage power distribution cabinet. When the circuit breaker trips automatically, people can generally quickly judge whether it is affected by the excessive power of the back-end load, and take corresponding measures. Power consumption adjustment measures, such as disconnecting the power connection of high-power load equipment or closing other unimportant load connections, and re-closing the tripped switch after a certain time interval, the current circuit breaker only has an independent switch function, It usually requires personnel to re-close the trip switch at the distribution box. In the actual production and living environment, it is not a...

AI Technical Summary

Problems solved by technology

[0002] A number of circuit breakers with short-circuit protection function are usually installed in the low-voltage power distribution box or low-voltage power distribution cabinet. When the circuit breaker trips automatically, people can generally quickly judge whether it is affected by the excessive power of the back-end load, and take corresponding measures. Power consumption adjustment measures, such as disconnecting the power connection of high-power load equipment or closing other unimportant load connections, and re-closing the tripped switch after a certain time interval, the current circuit breaker only has an independent switch function, It usually requires personnel to re-close the trip switch at the distribution box. In the actual production and living environment, it is not always possible to manually close the switch in time, which will bring unnecessary troubles to people's production and life. Therefore, it is necessary to design A new circuit solves

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